提交 ddf32b8b 编写于 作者: Y Yangys

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Signed-off-by: NYangys <yangyousheng@huawei.com>
上级 3cbd24d2
# @ohos.net.http (数据请求)
本模块提供HTTP数据请求能力。应用可以通过HTTP发起一个数据请求,支持常见的GET、POST、OPTIONS、HEAD、PUT、DELETE、TRACE、CONNECT方法。
>**说明:**
>
>本模块首批接口从API version 6开始支持。后续版本的新增接口,采用上角标单独标记接口的起始版本。
>
## 导入模块
```js
import http from '@ohos.net.http';
```
## 完整示例
```js
import http from '@ohos.net.http';
// 每一个httpRequest对应一个HTTP请求任务,不可复用
let httpRequest = http.createHttp();
// 用于订阅HTTP响应头,此接口会比request请求先返回。可以根据业务需要订阅此消息
// 从API 8开始,使用on('headersReceive', Callback)替代on('headerReceive', AsyncCallback)。 8+
httpRequest.on('headersReceive', (header) => {
console.info('header: ' + JSON.stringify(header));
});
httpRequest.request(
// 填写HTTP请求的URL地址,可以带参数也可以不带参数。URL地址需要开发者自定义。请求的参数可以在extraData中指定
"EXAMPLE_URL",
{
method: http.RequestMethod.POST, // 可选,默认为http.RequestMethod.GET
// 开发者根据自身业务需要添加header字段
header: {
'Content-Type': 'application/json'
},
// 当使用POST请求时此字段用于传递内容
extraData: {
"data": "data to send",
},
expectDataType: http.HttpDataType.STRING, // 可选,指定返回数据的类型
usingCache: true, // 可选,默认为true
priority: 1, // 可选,默认为1
connectTimeout: 60000, // 可选,默认为60000ms
readTimeout: 60000, // 可选,默认为60000ms
usingProtocol: http.HttpProtocol.HTTP1_1, // 可选,协议类型默认值由系统自动指定
}, (err, data) => {
if (!err) {
// data.result为HTTP响应内容,可根据业务需要进行解析
console.info('Result:' + data.result);
console.info('code:' + data.responseCode);
// data.header为HTTP响应头,可根据业务需要进行解析
console.info('header:' + JSON.stringify(data.header));
console.info('cookies:' + data.cookies); // 8+
} else {
console.info('error:' + JSON.stringify(err));
// 当该请求使用完毕时,调用destroy方法主动销毁。
httpRequest.destroy();
}
}
);
```
## http.createHttp
createHttp\(\): HttpRequest
创建一个HTTP请求,里面包括发起请求、中断请求、订阅/取消订阅HTTP Response Header事件。每一个HttpRequest对象对应一个HTTP请求。如需发起多个HTTP请求,须为每个HTTP请求创建对应HttpRequest对象。
**系统能力**:SystemCapability.Communication.NetStack
**返回值:**
| 类型 | 说明 |
| :---------- | :----------------------------------------------------------- |
| HttpRequest | 返回一个HttpRequest对象,里面包括request、destroy、on和off方法。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2100002 | System internal error. |
| 2300999 | Unknown Other Error |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
**示例:**
```js
import http from '@ohos.net.http';
let httpRequest = http.createHttp();
```
## HttpRequest
HTTP请求任务。在调用HttpRequest的方法前,需要先通过[createHttp\(\)](#httpcreatehttp)创建一个任务。
### request
request\(url: string, callback: AsyncCallback\<HttpResponse\>\):void
根据URL地址,发起HTTP网络请求,使用callback方式作为异步方法。
**需要权限**:ohos.permission.INTERNET
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | ---------------------------------------------- | ---- | ----------------------- |
| url | string | 是 | 发起网络请求的URL地址。 |
| callback | AsyncCallback\<[HttpResponse](#httpresponse)\> | 是 | 回调函数。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol |
| 2300003 | URL using bad/illegal format or missing URL |
| 2300005 | Couldn't resolve proxy name |
| 2300006 | Couldn't resolve host name |
| 2300007 | Couldn't connect to server |
| 2300052 | Server returned nothing (no headers, no data) |
| 2300999 | Unknown Other Error |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
**示例:**
```js
httpRequest.request("EXAMPLE_URL", (err, data) => {
if (!err) {
console.info('Result:' + data.result);
console.info('code:' + data.responseCode);
console.info('header:' + JSON.stringify(data.header));
console.info('cookies:' + data.cookies); // 8+
} else {
console.info('error:' + JSON.stringify(err));
}
});
```
### request
request\(url: string, options: HttpRequestOptions, callback: AsyncCallback<HttpResponse\>\):void
根据URL地址和相关配置项,发起HTTP网络请求,使用callback方式作为异步方法。
**需要权限**:ohos.permission.INTERNET
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | ---------------------------------------------- | ---- | ----------------------------------------------- |
| url | string | 是 | 发起网络请求的URL地址。 |
| options | HttpRequestOptions | 是 | 参考[HttpRequestOptions](#httprequestoptions)。 |
| callback | AsyncCallback\<[HttpResponse](#httpresponse)\> | 是 | 回调函数。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol |
| 2300003 | URL using bad/illegal format or missing URL |
| 2300005 | Couldn't resolve proxy name |
| 2300006 | Couldn't resolve host name |
| 2300007 | Couldn't connect to server |
| 2300008 | Weird server reply |
| 2300009 | Access denied to remote resource |
| 2300999 | Unknown Other Error |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
**示例:**
```js
httpRequest.request("EXAMPLE_URL",
{
method: http.RequestMethod.GET,
header: {
'Content-Type': 'application/json'
},
readTimeout: 60000,
connectTimeout: 60000
}, (err, data) => {
if (!err) {
console.info('Result:' + data.result);
console.info('code:' + data.responseCode);
console.info('header:' + JSON.stringify(data.header));
console.info('cookies:' + data.cookies); // 8+
console.info('header.Content-Type:' + data.header['Content-Type']);
console.info('header.Status-Line:' + data.header['Status-Line']);
} else {
console.info('error:' + JSON.stringify(err));
}
});
```
### request
request\(url: string, options? : HttpRequestOptions\): Promise<HttpResponse\>
根据URL地址,发起HTTP网络请求,使用Promise方式作为异步方法。
**需要权限**:ohos.permission.INTERNET
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| ------- | ------------------ | ---- | ----------------------------------------------- |
| url | string | 是 | 发起网络请求的URL地址。 |
| options | HttpRequestOptions | 否 | 参考[HttpRequestOptions](#httprequestoptions)。 |
**返回值:**
| 类型 | 说明 |
| :------------------------------------- | :-------------------------------- |
| Promise<[HttpResponse](#httpresponse)> | 以Promise形式返回发起请求的结果。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol |
| 2300003 | URL using bad/illegal format or missing URL |
| 2300005 | Couldn't resolve proxy name |
| 2300006 | Couldn't resolve host name |
| 2300007 | Couldn't connect to server |
| 2300009 | Access denied to remote resource |
| 2300999 | Unknown Other Error |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
**示例:**
```js
let promise = httpRequest.request("EXAMPLE_URL", {
method: http.RequestMethod.GET,
connectTimeout: 60000,
readTimeout: 60000,
header: {
'Content-Type': 'application/json'
}
});
promise.then((data) => {
console.info('Result:' + data.result);
console.info('code:' + data.responseCode);
console.info('header:' + JSON.stringify(data.header));
console.info('cookies:' + data.cookies); // 8+
console.info('header.Content-Type:' + data.header['Content-Type']);
console.info('header.Status-Line:' + data.header['Status-Line']);
}).catch((err) => {
console.info('error:' + JSON.stringify(err));
});
```
### destroy
destroy\(\): void
中断请求任务。
**系统能力**:SystemCapability.Communication.NetStack
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300999 | Unknown Other Error |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
**示例:**
```js
httpRequest.destroy();
```
### on\('headerReceive'\)
on\(type: 'headerReceive', callback: AsyncCallback<Object\>\): void
订阅HTTP Response Header 事件。
>![](public_sys-resources/icon-note.gif) **说明:**
>此接口已废弃,建议使用[on\('headersReceive'\)<sup>8+</sup>](#onheadersreceive8)替代。
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | ----------------------- | ---- | --------------------------------- |
| type | string | 是 | 订阅的事件类型,'headerReceive'。 |
| callback | AsyncCallback\<Object\> | 是 | 回调函数。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol |
| 2300003 | URL using bad/illegal format or missing URL |
| 2300005 | Couldn't resolve proxy name |
| 2300006 | Couldn't resolve host name |
| 2300007 | Couldn't connect to server |
| 2300008 | Weird server reply |
| 2300009 | Access denied to remote resource |
| 2300023 | Failed writing received data to disk/application |
| 2300025 | Upload failed |
| 2300027 | Out of memory |
| 2300028 | Timeout was reached |
| 2300052 | Server returned nothing (no headers, no data) |
| 2300056 | Failure when receiving data from the peer |
| 2300058 | Problem with the local SSL certificate |
| 2300060 | SSL peer certificate or SSH remote key was not OK |
| 2300061 | Unrecognized or bad HTTP Content or Transfer-Encoding |
| 2300063 | Maximum file size exceeded |
| 2300070 | Disk full or allocation exceeded |
| 2300077 | Problem with the SSL CA cert (path? access rights?) |
| 2300078 | Remote file not found |
| 2300999 | Unknown Other Error |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
**示例:**
```js
httpRequest.on('headerReceive', (err, data) => {
if (!err) {
console.info('header: ' + JSON.stringify(data));
} else {
console.info('error:' + JSON.stringify(err));
}
});
```
### off\('headerReceive'\)
off\(type: 'headerReceive', callback?: AsyncCallback<Object\>\): void
取消订阅HTTP Response Header 事件。
>![](public_sys-resources/icon-note.gif) **说明:**
>
>1. 此接口已废弃,建议使用[off\('headersReceive'\)<sup>8+</sup>](#offheadersreceive8)替代。
>
>2. 可以指定传入on中的callback取消一个订阅,也可以不指定callback清空所有订阅。
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | ----------------------- | ---- | ------------------------------------- |
| type | string | 是 | 取消订阅的事件类型,'headerReceive'。 |
| callback | AsyncCallback\<Object\> | 否 | 回调函数。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol |
| 2300003 | URL using bad/illegal format or missing URL |
| 2300005 | Couldn't resolve proxy name |
| 2300006 | Couldn't resolve host name |
| 2300007 | Couldn't connect to server |
| 2300008 | Weird server reply |
| 2300009 | Access denied to remote resource |
| 2300999 | Unknown Other Error |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
**示例:**
```js
httpRequest.off('headerReceive');
```
### on\('headersReceive'\)<sup>8+</sup>
on\(type: 'headersReceive', callback: Callback<Object\>\): void
订阅HTTP Response Header 事件。
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | ------------------ | ---- | ---------------------------------- |
| type | string | 是 | 订阅的事件类型:'headersReceive'。 |
| callback | Callback\<Object\> | 是 | 回调函数。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol |
| 2300003 | URL using bad/illegal format or missing URL |
| 2300005 | Couldn't resolve proxy name |
| 2300006 | Couldn't resolve host name |
| 2300007 | Couldn't connect to server |
| 2300008 | Weird server reply |
| 2300009 | Access denied to remote resource |
| 2300023 | Failed writing received data to disk/application |
| 2300025 | Upload failed |
| 2300027 | Out of memory |
| 2300028 | Timeout was reached |
| 2300052 | Server returned nothing (no headers, no data) |
| 2300056 | Failure when receiving data from the peer |
| 2300058 | Problem with the local SSL certificate |
| 2300060 | SSL peer certificate or SSH remote key was not OK |
| 2300061 | Unrecognized or bad HTTP Content or Transfer-Encoding |
| 2300063 | Maximum file size exceeded |
| 2300070 | Disk full or allocation exceeded |
| 2300077 | Problem with the SSL CA cert (path? access rights?) |
| 2300078 | Remote file not found |
| 2300999 | Unknown Other Error |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
**示例:**
```js
httpRequest.on('headersReceive', (header) => {
console.info('header: ' + JSON.stringify(header));
});
```
### off\('headersReceive'\)<sup>8+</sup>
off\(type: 'headersReceive', callback?: Callback<Object\>\): void
取消订阅HTTP Response Header 事件。
>![](public_sys-resources/icon-note.gif) **说明:**
>可以指定传入on中的callback取消一个订阅,也可以不指定callback清空所有订阅。
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | ------------------ | ---- | -------------------------------------- |
| type | string | 是 | 取消订阅的事件类型:'headersReceive'。 |
| callback | Callback\<Object\> | 否 | 回调函数。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol |
| 2300003 | URL using bad/illegal format or missing URL |
| 2300005 | Couldn't resolve proxy name |
| 2300006 | Couldn't resolve host name |
| 2300007 | Couldn't connect to server |
| 2300008 | Weird server reply |
| 2300009 | Access denied to remote resource |
| 2300999 | Unknown Other Error |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
**示例:**
```js
httpRequest.off('headersReceive');
```
### once\('headersReceive'\)<sup>8+</sup>
once\(type: 'headersReceive', callback: Callback<Object\>\): void
订阅HTTP Response Header 事件,但是只触发一次。一旦触发之后,订阅器就会被移除。使用callback方式作为异步方法。
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | ------------------ | ---- | ---------------------------------- |
| type | string | 是 | 订阅的事件类型:'headersReceive'。 |
| callback | Callback\<Object\> | 是 | 回调函数。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol |
| 2300003 | URL using bad/illegal format or missing URL |
| 2300005 | Couldn't resolve proxy name |
| 2300006 | Couldn't resolve host name |
| 2300007 | Couldn't connect to server |
| 2300008 | Weird server reply |
| 2300009 | Access denied to remote resource |
| 2300023 | Failed writing received data to disk/application |
| 2300025 | Upload failed |
| 2300027 | Out of memory |
| 2300028 | Timeout was reached |
| 2300052 | Server returned nothing (no headers, no data) |
| 2300056 | Failure when receiving data from the peer |
| 2300058 | Problem with the local SSL certificate |
| 2300060 | SSL peer certificate or SSH remote key was not OK |
| 2300061 | Unrecognized or bad HTTP Content or Transfer-Encoding |
| 2300063 | Maximum file size exceeded |
| 2300070 | Disk full or allocation exceeded |
| 2300077 | Problem with the SSL CA cert (path? access rights?) |
| 2300078 | Remote file not found |
| 2300999 | Unknown Other Error |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
**示例:**
```js
httpRequest.once('headersReceive', (header) => {
console.info('header: ' + JSON.stringify(header));
});
```
## HttpRequestOptions
发起请求可选参数的类型和取值范围。
**系统能力**:以下各项对应的系统能力均为SystemCapability.Communication.NetStack。
| 名称 | 类型 | 必填 | 说明 |
| -------------- | --------------------------------------------- | ---- | ------------------------------------------------------------ |
| method | [RequestMethod](#requestmethod) | 否 | 请求方式。 |
| extraData | string \| Object \| ArrayBuffer<sup>6+</sup> | 否 | 发送请求的额外数据。<br />- 当HTTP请求为POST、PUT等方法时,此字段为HTTP请求的content。<br />- 当HTTP请求为GET、OPTIONS、DELETE、TRACE、CONNECT等方法时,此字段为HTTP请求的参数补充,参数内容会拼接到URL中进行发送。<sup>6+</sup><br />- 开发者传入string对象,开发者需要自行编码,将编码后的string传入。<sup>6+</sup> |
| expectDataType<sup>9+</sup> | [HttpDataType](#httpdatatype9) | 否 | 指定返回数据的类型。如果设置了此参数,系统将优先返回指定的类型。 |
| usingCache<sup>9+</sup> | boolean | 否 | 是否使用缓存,默认为true。 |
| priority<sup>9+</sup> | number | 否 | 优先级,范围\[1,1000],默认是1。 |
| header | Object | 否 | HTTP请求头字段。默认{'Content-Type': 'application/json'}。 |
| readTimeout | number | 否 | 读取超时时间。单位为毫秒(ms),默认为60000ms。 |
| connectTimeout | number | 否 | 连接超时时间。单位为毫秒(ms),默认为60000ms。 |
| usingProtocol<sup>9+</sup> | [HttpProtocol](#httpprotocol9) | 否 | 使用协议。默认值由系统自动指定。 |
## RequestMethod
HTTP 请求方法。
**系统能力**:以下各项对应的系统能力均为SystemCapability.Communication.NetStack。
| 名称 | 值 | 说明 |
| :------ | ------- | :------------------ |
| OPTIONS | "OPTIONS" | HTTP 请求 OPTIONS。 |
| GET | "GET" | HTTP 请求 GET。 |
| HEAD | "HEAD" | HTTP 请求 HEAD。 |
| POST | "POST" | HTTP 请求 POST。 |
| PUT | "PUT" | HTTP 请求 PUT。 |
| DELETE | "DELETE" | HTTP 请求 DELETE。 |
| TRACE | "TRACE" | HTTP 请求 TRACE。 |
| CONNECT | "CONNECT" | HTTP 请求 CONNECT。 |
## ResponseCode
发起请求返回的响应码。
**系统能力**:以下各项对应的系统能力均为SystemCapability.Communication.NetStack。
| 名称 | 值 | 说明 |
| ----------------- | ---- | ------------------------------------------------------------ |
| OK | 200 | 请求成功。一般用于GET与POST请求。 |
| CREATED | 201 | 已创建。成功请求并创建了新的资源。 |
| ACCEPTED | 202 | 已接受。已经接受请求,但未处理完成。 |
| NOT_AUTHORITATIVE | 203 | 非授权信息。请求成功。 |
| NO_CONTENT | 204 | 无内容。服务器成功处理,但未返回内容。 |
| RESET | 205 | 重置内容。 |
| PARTIAL | 206 | 部分内容。服务器成功处理了部分GET请求。 |
| MULT_CHOICE | 300 | 多种选择。 |
| MOVED_PERM | 301 | 永久移动。请求的资源已被永久的移动到新URI,返回信息会包括新的URI,浏览器会自动定向到新URI。 |
| MOVED_TEMP | 302 | 临时移动。 |
| SEE_OTHER | 303 | 查看其它地址。 |
| NOT_MODIFIED | 304 | 未修改。 |
| USE_PROXY | 305 | 使用代理。 |
| BAD_REQUEST | 400 | 客户端请求的语法错误,服务器无法理解。 |
| UNAUTHORIZED | 401 | 请求要求用户的身份认证。 |
| PAYMENT_REQUIRED | 402 | 保留,将来使用。 |
| FORBIDDEN | 403 | 服务器理解请求客户端的请求,但是拒绝执行此请求。 |
| NOT_FOUND | 404 | 服务器无法根据客户端的请求找到资源(网页)。 |
| BAD_METHOD | 405 | 客户端请求中的方法被禁止。 |
| NOT_ACCEPTABLE | 406 | 服务器无法根据客户端请求的内容特性完成请求。 |
| PROXY_AUTH | 407 | 请求要求代理的身份认证。 |
| CLIENT_TIMEOUT | 408 | 请求时间过长,超时。 |
| CONFLICT | 409 | 服务器完成客户端的PUT请求是可能返回此代码,服务器处理请求时发生了冲突。 |
| GONE | 410 | 客户端请求的资源已经不存在。 |
| LENGTH_REQUIRED | 411 | 服务器无法处理客户端发送的不带Content-Length的请求信息。 |
| PRECON_FAILED | 412 | 客户端请求信息的先决条件错误。 |
| ENTITY_TOO_LARGE | 413 | 由于请求的实体过大,服务器无法处理,因此拒绝请求。 |
| REQ_TOO_LONG | 414 | 请求的URI过长(URI通常为网址),服务器无法处理。 |
| UNSUPPORTED_TYPE | 415 | 服务器无法处理请求的格式。 |
| INTERNAL_ERROR | 500 | 服务器内部错误,无法完成请求。 |
| NOT_IMPLEMENTED | 501 | 服务器不支持请求的功能,无法完成请求。 |
| BAD_GATEWAY | 502 | 充当网关或代理的服务器,从远端服务器接收到了一个无效的请求。 |
| UNAVAILABLE | 503 | 由于超载或系统维护,服务器暂时的无法处理客户端的请求。 |
| GATEWAY_TIMEOUT | 504 | 充当网关或代理的服务器,未及时从远端服务器获取请求。 |
| VERSION | 505 | 服务器请求的HTTP协议的版本。 |
## HttpResponse
request方法回调函数的返回值类型。
**系统能力**:以下各项对应的系统能力均为SystemCapability.Communication.NetStack。
| 名称 | 类型 | 必填 | 说明 |
| -------------------- | -------------------------------------------- | ---- | ------------------------------------------------------------ |
| result | string \| Object \| ArrayBuffer<sup>6+</sup> | 是 | HTTP请求根据响应头中Content-type类型返回对应的响应格式内容:<br />- application/json:返回JSON格式的字符串,如需HTTP响应具体内容,需开发者自行解析<br />- application/octet-stream:ArrayBuffer<br />- 其他:string |
| resultType<sup>9+</sup> | [HttpDataType](#httpdatatype9) | 是 | 返回值类型。 |
| responseCode | [ResponseCode](#responsecode) \| number | 是 | 回调函数执行成功时,此字段为[ResponseCode](#responsecode)。若执行失败,错误码将会从AsyncCallback中的err字段返回。 |
| header | Object | 是 | 发起HTTP请求返回来的响应头。当前返回的是JSON格式字符串,如需具体字段内容,需开发者自行解析。常见字段及解析方式如下:<br/>- Content-Type:header['Content-Type'];<br />- Status-Line:header['Status-Line'];<br />- Date:header.Date/header['Date'];<br />- Server:header.Server/header['Server']; |
| cookies<sup>8+</sup> | Array\<string\> | 是 | 服务器返回的 cookies。 |
## http.createHttpResponseCache<sup>9+</sup>
createHttpResponseCache(cacheSize?: number): HttpResponseCache
创建一个默认的对象来存储HTTP访问请求的响应。
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | --------------------------------------- | ---- | ---------- |
| cacheSize | number | 否 | 缓存大小最大为10\*1024\*1024(10MB),默认最大。 |
**返回值:**
| 类型 | 说明 |
| :---------- | :----------------------------------------------------------- |
| [HttpResponseCache](#httpresponsecache9) | 返回一个存储HTTP访问请求响应的对象。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300008 | Weird server reply |
| 2300009 | Access denied to remote resource |
| 2300016 | Error in the HTTP2 framing layer |
| 2300018 | Transferred a partial file |
| 2300023 | Failed writing received data to disk/application |
| 2300025 | Upload failed |
| 2300026 | Failed to open/read local data from file/application |
| 2300027 | Out of memory |
| 2300028 | Timeout was reached |
| 2300047 | Number of redirects hit maximum amount |
| 2300052 | Server returned nothing (no headers, no data) |
| 2300055 | Failed sending data to the peer |
| 2300056 | Failure when receiving data from the peer |
| 2300058 | Problem with the local SSL certificate |
| 2300059 | Couldn't use specified SSL cipher |
| 2300060 | SSL peer certificate or SSH remote key was not OK |
| 2300061 | Unrecognized or bad HTTP Content or Transfer-Encoding |
| 2300063 | Maximum file size exceeded |
| 2300070 | Disk full or allocation exceeded |
| 2300073 | Remote file already exists |
| 2300077 | Problem with the SSL CA cert (path? access rights?) |
| 2300078 | Remote file not found |
| 2300094 | An authentication function returned an error |
| 2300999 | Unknown Other Error |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
**示例:**
```js
import http from '@ohos.net.http';
let httpResponseCache = http.createHttpResponseCache();
```
## HttpResponseCache<sup>9+</sup>
存储HTTP访问请求响应的对象。
### flush<sup>9+</sup>
flush(callback: AsyncCallback\<void>): void
将缓存中的数据写入文件系统,以便在下一个HTTP请求中访问所有缓存数据,使用callback方式作为异步方法。
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | --------------------------------------- | ---- | ---------- |
| callback | AsyncCallback\<void> | 是 | 回调函数返回写入结果。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol |
| 2300008 | Weird server reply |
| 2300009 | Access denied to remote resource |
| 2300016 | Error in the HTTP2 framing layer |
| 2300018 | Transferred a partial file |
| 2300023 | Failed writing received data to disk/application |
| 2300025 | Upload failed |
| 2300026 | Failed to open/read local data from file/application |
| 2300027 | Out of memory |
| 2300028 | Timeout was reached |
| 2300047 | Number of redirects hit maximum amount |
| 2300052 | Server returned nothing (no headers, no data) |
| 2300055 | Failed sending data to the peer |
| 2300056 | Failure when receiving data from the peer |
| 2300058 | Problem with the local SSL certificate |
| 2300059 | Couldn't use specified SSL cipher |
| 2300060 | SSL peer certificate or SSH remote key was not OK |
| 2300061 | Unrecognized or bad HTTP Content or Transfer-Encoding |
| 2300063 | Maximum file size exceeded |
| 2300070 | Disk full or allocation exceeded |
| 2300073 | Remote file already exists |
| 2300077 | Problem with the SSL CA cert (path? access rights?) |
| 2300078 | Remote file not found |
| 2300094 | An authentication function returned an error |
| 2300999 | Unknown Other Error |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
**示例:**
```js
httpResponseCache.flush(err => {
if (err) {
console.log('flush fail');
return;
}
console.log('flush success');
});
```
### flush<sup>9+</sup>
flush(): Promise\<void>
将缓存中的数据写入文件系统,以便在下一个HTTP请求中访问所有缓存数据,使用Promise方式作为异步方法。
**系统能力**:SystemCapability.Communication.NetStack
**返回值:**
| 类型 | 说明 |
| --------------------------------- | ------------------------------------- |
| Promise\<void>> | 以Promise形式返回写入结果。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol |
| 2300008 | Weird server reply |
| 2300009 | Access denied to remote resource |
| 2300016 | Error in the HTTP2 framing layer |
| 2300018 | Transferred a partial file |
| 2300023 | Failed writing received data to disk/application |
| 2300025 | Upload failed |
| 2300026 | Failed to open/read local data from file/application |
| 2300027 | Out of memory |
| 2300028 | Timeout was reached |
| 2300047 | Number of redirects hit maximum amount |
| 2300052 | Server returned nothing (no headers, no data) |
| 2300055 | Failed sending data to the peer |
| 2300056 | Failure when receiving data from the peer |
| 2300058 | Problem with the local SSL certificate |
| 2300059 | Couldn't use specified SSL cipher |
| 2300060 | SSL peer certificate or SSH remote key was not OK |
| 2300061 | Unrecognized or bad HTTP Content or Transfer-Encoding |
| 2300063 | Maximum file size exceeded |
| 2300070 | Disk full or allocation exceeded |
| 2300073 | Remote file already exists |
| 2300077 | Problem with the SSL CA cert (path? access rights?) |
| 2300078 | Remote file not found |
| 2300094 | An authentication function returned an error |
| 2300999 | Unknown Other Error |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
**示例:**
```js
httpResponseCache.flush().then(() => {
console.log('flush success');
}).catch(err => {
console.log('flush fail');
});
```
### delete<sup>9+</sup>
delete(callback: AsyncCallback\<void>): void
禁用缓存并删除其中的数据,使用callback方式作为异步方法。
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | --------------------------------------- | ---- | ---------- |
| callback | AsyncCallback\<void> | 是 | 回调函数返回删除结果。|
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol |
| 2300003 | URL using bad/illegal format or missing URL |
| 2300005 | Couldn't resolve proxy name |
| 2300006 | Couldn't resolve host name |
| 2300007 | Couldn't connect to server |
| 2300008 | Weird server reply |
| 2300009 | Access denied to remote resource |
| 2300999 | Unknown Other Error |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
**示例:**
```js
httpResponseCache.delete(err => {
if (err) {
console.log('delete fail');
return;
}
console.log('delete success');
});
```
### delete<sup>9+</sup>
delete(): Promise\<void>
禁用缓存并删除其中的数据,使用Promise方式作为异步方法。
**系统能力**:SystemCapability.Communication.NetStack
**返回值:**
| 类型 | 说明 |
| --------------------------------- | ------------------------------------- |
| Promise\<void> | 以Promise形式返回删除结果。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300999 | Unknown Other Error |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
**示例:**
```js
httpResponseCache.delete().then(() => {
console.log('delete success');
}).catch(err => {
console.log('delete fail');
});
```
## HttpDataType<sup>9+</sup>
http的数据类型。
**系统能力**:SystemCapability.Communication.NetStack
| 名称 | 值 | 说明 |
| ------------------ | -- | ----------- |
| STRING | 0 | 字符串类型。 |
| OBJECT | 1 | 对象类型。 |
| ARRAY_BUFFER | 2 | 二进制数组类型。|
## HttpProtocol<sup>9+</sup>
http协议版本。
**系统能力**:SystemCapability.Communication.NetStack
| 名称 | 说明 |
| :-------- | :----------- |
| HTTP1_1 | 协议http1.1 |
| HTTP2 | 协议http2 |
# @ohos.net.http (数据请求)
本模块提供HTTP数据请求能力。应用可以通过HTTP发起一个数据请求,支持常见的GET、POST、OPTIONS、HEAD、PUT、DELETE、TRACE、CONNECT方法。
>**说明:**
>
>本模块首批接口从API version 6开始支持。后续版本的新增接口,采用上角标单独标记接口的起始版本。
>
## 导入模块
```js
import http from '@ohos.net.http';
```
## 完整示例
```js
import http from '@ohos.net.http';
// 每一个httpRequest对应一个HTTP请求任务,不可复用
let httpRequest = http.createHttp();
// 用于订阅HTTP响应头,此接口会比request请求先返回。可以根据业务需要订阅此消息
// 从API 8开始,使用on('headersReceive', Callback)替代on('headerReceive', AsyncCallback)。 8+
httpRequest.on('headersReceive', (header) => {
console.info('header: ' + JSON.stringify(header));
});
httpRequest.request(
// 填写HTTP请求的URL地址,可以带参数也可以不带参数。URL地址需要开发者自定义。请求的参数可以在extraData中指定
"EXAMPLE_URL",
{
method: http.RequestMethod.POST, // 可选,默认为http.RequestMethod.GET
// 开发者根据自身业务需要添加header字段
header: {
'Content-Type': 'application/json'
},
// 当使用POST请求时此字段用于传递内容
extraData: {
"data": "data to send",
},
expectDataType: http.HttpDataType.STRING, // 可选,指定返回数据的类型
usingCache: true, // 可选,默认为true
priority: 1, // 可选,默认为1
connectTimeout: 60000, // 可选,默认为60000ms
readTimeout: 60000, // 可选,默认为60000ms
usingProtocol: http.HttpProtocol.HTTP1_1, // 可选,协议类型默认值由系统自动指定
}, (err, data) => {
if (!err) {
// data.result为HTTP响应内容,可根据业务需要进行解析
console.info('Result:' + data.result);
console.info('code:' + data.responseCode);
// data.header为HTTP响应头,可根据业务需要进行解析
console.info('header:' + JSON.stringify(data.header));
console.info('cookies:' + data.cookies); // 8+
} else {
console.info('error:' + JSON.stringify(err));
// 当该请求使用完毕时,调用destroy方法主动销毁。
httpRequest.destroy();
}
}
);
```
## http.createHttp
createHttp\(\): HttpRequest
创建一个HTTP请求,里面包括发起请求、中断请求、订阅/取消订阅HTTP Response Header事件。每一个HttpRequest对象对应一个HTTP请求。如需发起多个HTTP请求,须为每个HTTP请求创建对应HttpRequest对象。
**系统能力**:SystemCapability.Communication.NetStack
**返回值:**
| 类型 | 说明 |
| :---------- | :----------------------------------------------------------- |
| HttpRequest | 返回一个HttpRequest对象,里面包括request、destroy、on和off方法。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2100002 | System internal error. |
| 2300999 | Unknown Other Error。 |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
**示例:**
```js
import http from '@ohos.net.http';
let httpRequest = http.createHttp();
```
## HttpRequest
HTTP请求任务。在调用HttpRequest的方法前,需要先通过[createHttp\(\)](#httpcreatehttp)创建一个任务。
### request
request\(url: string, callback: AsyncCallback\<HttpResponse\>\):void
根据URL地址,发起HTTP网络请求,使用callback方式作为异步方法。
**需要权限**:ohos.permission.INTERNET
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | ---------------------------------------------- | ---- | ----------------------- |
| url | string | 是 | 发起网络请求的URL地址。 |
| callback | AsyncCallback\<[HttpResponse](#httpresponse)\> | 是 | 回调函数。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol |
| 2300003 | URL using bad/illegal format or missing URL |
| 2300005 | Couldn't resolve proxy name |
| 2300006 | Couldn't resolve host name |
| 2300007 | Couldn't connect to server |
| 2300052 | Server returned nothing (no headers, no data) |
| 2300999 | Unknown Other Error |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
**示例:**
```js
httpRequest.request("EXAMPLE_URL", (err, data) => {
if (!err) {
console.info('Result:' + data.result);
console.info('code:' + data.responseCode);
console.info('header:' + JSON.stringify(data.header));
console.info('cookies:' + data.cookies); // 8+
} else {
console.info('error:' + JSON.stringify(err));
}
});
```
### request
request\(url: string, options: HttpRequestOptions, callback: AsyncCallback<HttpResponse\>\):void
根据URL地址和相关配置项,发起HTTP网络请求,使用callback方式作为异步方法。
**需要权限**:ohos.permission.INTERNET
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | ---------------------------------------------- | ---- | ----------------------------------------------- |
| url | string | 是 | 发起网络请求的URL地址。 |
| options | HttpRequestOptions | 是 | 参考[HttpRequestOptions](#httprequestoptions)。 |
| callback | AsyncCallback\<[HttpResponse](#httpresponse)\> | 是 | 回调函数。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol |
| 2300003 | URL using bad/illegal format or missing URL |
| 2300005 | Couldn't resolve proxy name |
| 2300006 | Couldn't resolve host name |
| 2300007 | Couldn't connect to server |
| 2300008 | Weird server reply |
| 2300009 | Access denied to remote resource |
| 2300999 | Unknown Other Error |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
**示例:**
```js
httpRequest.request("EXAMPLE_URL",
{
method: http.RequestMethod.GET,
header: {
'Content-Type': 'application/json'
},
readTimeout: 60000,
connectTimeout: 60000
}, (err, data) => {
if (!err) {
console.info('Result:' + data.result);
console.info('code:' + data.responseCode);
console.info('header:' + JSON.stringify(data.header));
console.info('cookies:' + data.cookies); // 8+
console.info('header.Content-Type:' + data.header['Content-Type']);
console.info('header.Status-Line:' + data.header['Status-Line']);
} else {
console.info('error:' + JSON.stringify(err));
}
});
```
### request
request\(url: string, options? : HttpRequestOptions\): Promise<HttpResponse\>
根据URL地址,发起HTTP网络请求,使用Promise方式作为异步方法。
**需要权限**:ohos.permission.INTERNET
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| ------- | ------------------ | ---- | ----------------------------------------------- |
| url | string | 是 | 发起网络请求的URL地址。 |
| options | HttpRequestOptions | 否 | 参考[HttpRequestOptions](#httprequestoptions)。 |
**返回值:**
| 类型 | 说明 |
| :------------------------------------- | :-------------------------------- |
| Promise<[HttpResponse](#httpresponse)> | 以Promise形式返回发起请求的结果。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol |
| 2300003 | URL using bad/illegal format or missing URL |
| 2300005 | Couldn't resolve proxy name |
| 2300006 | Couldn't resolve host name |
| 2300007 | Couldn't connect to server |
| 2300009 | Access denied to remote resource |
| 2300999 | Unknown Other Error |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
**示例:**
```js
let promise = httpRequest.request("EXAMPLE_URL", {
method: http.RequestMethod.GET,
connectTimeout: 60000,
readTimeout: 60000,
header: {
'Content-Type': 'application/json'
}
});
promise.then((data) => {
console.info('Result:' + data.result);
console.info('code:' + data.responseCode);
console.info('header:' + JSON.stringify(data.header));
console.info('cookies:' + data.cookies); // 8+
console.info('header.Content-Type:' + data.header['Content-Type']);
console.info('header.Status-Line:' + data.header['Status-Line']);
}).catch((err) => {
console.info('error:' + JSON.stringify(err));
});
```
### destroy
destroy\(\): void
中断请求任务。
**系统能力**:SystemCapability.Communication.NetStack
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300999 | Unknown Other Error |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
**示例:**
```js
httpRequest.destroy();
```
### on\('headerReceive'\)
on\(type: 'headerReceive', callback: AsyncCallback<Object\>\): void
订阅HTTP Response Header 事件。
>![](public_sys-resources/icon-note.gif) **说明:**
>此接口已废弃,建议使用[on\('headersReceive'\)<sup>8+</sup>](#onheadersreceive8)替代。
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | ----------------------- | ---- | --------------------------------- |
| type | string | 是 | 订阅的事件类型,'headerReceive'。 |
| callback | AsyncCallback\<Object\> | 是 | 回调函数。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol |
| 2300003 | URL using bad/illegal format or missing URL |
| 2300005 | Couldn't resolve proxy name |
| 2300006 | Couldn't resolve host name |
| 2300007 | Couldn't connect to server |
| 2300008 | Weird server reply |
| 2300009 | Access denied to remote resource |
| 2300023 | Failed writing received data to disk/application |
| 2300025 | Upload failed |
| 2300027 | Out of memory |
| 2300028 | Timeout was reached |
| 2300052 | Server returned nothing (no headers, no data) |
| 2300056 | Failure when receiving data from the peer |
| 2300058 | Problem with the local SSL certificate |
| 2300060 | SSL peer certificate or SSH remote key was not OK |
| 2300061 | Unrecognized or bad HTTP Content or Transfer-Encoding |
| 2300063 | Maximum file size exceeded |
| 2300070 | Disk full or allocation exceeded |
| 2300077 | Problem with the SSL CA cert (path? access rights?) |
| 2300078 | Remote file not found |
| 2300999 | Unknown Other Error |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
**示例:**
```js
httpRequest.on('headerReceive', (err, data) => {
if (!err) {
console.info('header: ' + JSON.stringify(data));
} else {
console.info('error:' + JSON.stringify(err));
}
});
```
### off\('headerReceive'\)
off\(type: 'headerReceive', callback?: AsyncCallback<Object\>\): void
取消订阅HTTP Response Header 事件。
>![](public_sys-resources/icon-note.gif) **说明:**
>
>1. 此接口已废弃,建议使用[off\('headersReceive'\)<sup>8+</sup>](#offheadersreceive8)替代。
>
>2. 可以指定传入on中的callback取消一个订阅,也可以不指定callback清空所有订阅。
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | ----------------------- | ---- | ------------------------------------- |
| type | string | 是 | 取消订阅的事件类型,'headerReceive'。 |
| callback | AsyncCallback\<Object\> | 否 | 回调函数。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol |
| 2300003 | URL using bad/illegal format or missing URL |
| 2300005 | Couldn't resolve proxy name |
| 2300006 | Couldn't resolve host name |
| 2300007 | Couldn't connect to server |
| 2300008 | Weird server reply |
| 2300009 | Access denied to remote resource |
| 2300999 | Unknown Other Error |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
**示例:**
```js
httpRequest.off('headerReceive');
```
### on\('headersReceive'\)<sup>8+</sup>
on\(type: 'headersReceive', callback: Callback<Object\>\): void
订阅HTTP Response Header 事件。
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | ------------------ | ---- | ---------------------------------- |
| type | string | 是 | 订阅的事件类型:'headersReceive'。 |
| callback | Callback\<Object\> | 是 | 回调函数。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol |
| 2300003 | URL using bad/illegal format or missing URL |
| 2300005 | Couldn't resolve proxy name |
| 2300006 | Couldn't resolve host name |
| 2300007 | Couldn't connect to server |
| 2300008 | Weird server reply |
| 2300009 | Access denied to remote resource |
| 2300023 | Failed writing received data to disk/application |
| 2300025 | Upload failed |
| 2300027 | Out of memory |
| 2300028 | Timeout was reached |
| 2300052 | Server returned nothing (no headers, no data) |
| 2300056 | Failure when receiving data from the peer |
| 2300058 | Problem with the local SSL certificate |
| 2300060 | SSL peer certificate or SSH remote key was not OK |
| 2300061 | Unrecognized or bad HTTP Content or Transfer-Encoding |
| 2300063 | Maximum file size exceeded |
| 2300070 | Disk full or allocation exceeded |
| 2300077 | Problem with the SSL CA cert (path? access rights?) |
| 2300078 | Remote file not found |
| 2300999 | Unknown Other Error |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
**示例:**
```js
httpRequest.on('headersReceive', (header) => {
console.info('header: ' + JSON.stringify(header));
});
```
### off\('headersReceive'\)<sup>8+</sup>
off\(type: 'headersReceive', callback?: Callback<Object\>\): void
取消订阅HTTP Response Header 事件。
>![](public_sys-resources/icon-note.gif) **说明:**
>可以指定传入on中的callback取消一个订阅,也可以不指定callback清空所有订阅。
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | ------------------ | ---- | -------------------------------------- |
| type | string | 是 | 取消订阅的事件类型:'headersReceive'。 |
| callback | Callback\<Object\> | 否 | 回调函数。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol |
| 2300003 | URL using bad/illegal format or missing URL |
| 2300005 | Couldn't resolve proxy name |
| 2300006 | Couldn't resolve host name |
| 2300007 | Couldn't connect to server |
| 2300008 | Weird server reply |
| 2300009 | Access denied to remote resource |
| 2300999 | Unknown Other Error |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
**示例:**
```js
httpRequest.off('headersReceive');
```
### once\('headersReceive'\)<sup>8+</sup>
once\(type: 'headersReceive', callback: Callback<Object\>\): void
订阅HTTP Response Header 事件,但是只触发一次。一旦触发之后,订阅器就会被移除。使用callback方式作为异步方法。
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | ------------------ | ---- | ---------------------------------- |
| type | string | 是 | 订阅的事件类型:'headersReceive'。 |
| callback | Callback\<Object\> | 是 | 回调函数。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol |
| 2300003 | URL using bad/illegal format or missing URL |
| 2300005 | Couldn't resolve proxy name |
| 2300006 | Couldn't resolve host name |
| 2300007 | Couldn't connect to server |
| 2300008 | Weird server reply |
| 2300009 | Access denied to remote resource |
| 2300023 | Failed writing received data to disk/application |
| 2300025 | Upload failed |
| 2300027 | Out of memory |
| 2300028 | Timeout was reached |
| 2300052 | Server returned nothing (no headers, no data) |
| 2300056 | Failure when receiving data from the peer |
| 2300058 | Problem with the local SSL certificate |
| 2300060 | SSL peer certificate or SSH remote key was not OK |
| 2300061 | Unrecognized or bad HTTP Content or Transfer-Encoding |
| 2300063 | Maximum file size exceeded |
| 2300070 | Disk full or allocation exceeded |
| 2300077 | Problem with the SSL CA cert (path? access rights?) |
| 2300078 | Remote file not found |
| 2300999 | Unknown Other Error |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
**示例:**
```js
httpRequest.once('headersReceive', (header) => {
console.info('header: ' + JSON.stringify(header));
});
```
## HttpRequestOptions
发起请求可选参数的类型和取值范围。
**系统能力**:以下各项对应的系统能力均为SystemCapability.Communication.NetStack。
| 名称 | 类型 | 必填 | 说明 |
| -------------- | --------------------------------------------- | ---- | ------------------------------------------------------------ |
| method | [RequestMethod](#requestmethod) | 否 | 请求方式。 |
| extraData | string \| Object \| ArrayBuffer<sup>6+</sup> | 否 | 发送请求的额外数据。<br />- 当HTTP请求为POST、PUT等方法时,此字段为HTTP请求的content。<br />- 当HTTP请求为GET、OPTIONS、DELETE、TRACE、CONNECT等方法时,此字段为HTTP请求的参数补充,参数内容会拼接到URL中进行发送。<sup>6+</sup><br />- 开发者传入string对象,开发者需要自行编码,将编码后的string传入。<sup>6+</sup> |
| expectDataType<sup>9+</sup> | [HttpDataType](#httpdatatype9) | 否 | 指定返回数据的类型。如果设置了此参数,系统将优先返回指定的类型。 |
| usingCache<sup>9+</sup> | boolean | 否 | 是否使用缓存,默认为true。 |
| priority<sup>9+</sup> | number | 否 | 优先级,范围\[1,1000],默认是1。 |
| header | Object | 否 | HTTP请求头字段。默认{'Content-Type': 'application/json'}。 |
| readTimeout | number | 否 | 读取超时时间。单位为毫秒(ms),默认为60000ms。 |
| connectTimeout | number | 否 | 连接超时时间。单位为毫秒(ms),默认为60000ms。 |
| usingProtocol<sup>9+</sup> | [HttpProtocol](#httpprotocol9) | 否 | 使用协议。默认值由系统自动指定。 |
## RequestMethod
HTTP 请求方法。
**系统能力**:以下各项对应的系统能力均为SystemCapability.Communication.NetStack。
| 名称 | 值 | 说明 |
| :------ | ------- | :------------------ |
| OPTIONS | "OPTIONS" | HTTP 请求 OPTIONS。 |
| GET | "GET" | HTTP 请求 GET。 |
| HEAD | "HEAD" | HTTP 请求 HEAD。 |
| POST | "POST" | HTTP 请求 POST。 |
| PUT | "PUT" | HTTP 请求 PUT。 |
| DELETE | "DELETE" | HTTP 请求 DELETE。 |
| TRACE | "TRACE" | HTTP 请求 TRACE。 |
| CONNECT | "CONNECT" | HTTP 请求 CONNECT。 |
## ResponseCode
发起请求返回的响应码。
**系统能力**:以下各项对应的系统能力均为SystemCapability.Communication.NetStack。
| 名称 | 值 | 说明 |
| ----------------- | ---- | ------------------------------------------------------------ |
| OK | 200 | 请求成功。一般用于GET与POST请求。 |
| CREATED | 201 | 已创建。成功请求并创建了新的资源。 |
| ACCEPTED | 202 | 已接受。已经接受请求,但未处理完成。 |
| NOT_AUTHORITATIVE | 203 | 非授权信息。请求成功。 |
| NO_CONTENT | 204 | 无内容。服务器成功处理,但未返回内容。 |
| RESET | 205 | 重置内容。 |
| PARTIAL | 206 | 部分内容。服务器成功处理了部分GET请求。 |
| MULT_CHOICE | 300 | 多种选择。 |
| MOVED_PERM | 301 | 永久移动。请求的资源已被永久的移动到新URI,返回信息会包括新的URI,浏览器会自动定向到新URI。 |
| MOVED_TEMP | 302 | 临时移动。 |
| SEE_OTHER | 303 | 查看其它地址。 |
| NOT_MODIFIED | 304 | 未修改。 |
| USE_PROXY | 305 | 使用代理。 |
| BAD_REQUEST | 400 | 客户端请求的语法错误,服务器无法理解。 |
| UNAUTHORIZED | 401 | 请求要求用户的身份认证。 |
| PAYMENT_REQUIRED | 402 | 保留,将来使用。 |
| FORBIDDEN | 403 | 服务器理解请求客户端的请求,但是拒绝执行此请求。 |
| NOT_FOUND | 404 | 服务器无法根据客户端的请求找到资源(网页)。 |
| BAD_METHOD | 405 | 客户端请求中的方法被禁止。 |
| NOT_ACCEPTABLE | 406 | 服务器无法根据客户端请求的内容特性完成请求。 |
| PROXY_AUTH | 407 | 请求要求代理的身份认证。 |
| CLIENT_TIMEOUT | 408 | 请求时间过长,超时。 |
| CONFLICT | 409 | 服务器完成客户端的PUT请求是可能返回此代码,服务器处理请求时发生了冲突。 |
| GONE | 410 | 客户端请求的资源已经不存在。 |
| LENGTH_REQUIRED | 411 | 服务器无法处理客户端发送的不带Content-Length的请求信息。 |
| PRECON_FAILED | 412 | 客户端请求信息的先决条件错误。 |
| ENTITY_TOO_LARGE | 413 | 由于请求的实体过大,服务器无法处理,因此拒绝请求。 |
| REQ_TOO_LONG | 414 | 请求的URI过长(URI通常为网址),服务器无法处理。 |
| UNSUPPORTED_TYPE | 415 | 服务器无法处理请求的格式。 |
| INTERNAL_ERROR | 500 | 服务器内部错误,无法完成请求。 |
| NOT_IMPLEMENTED | 501 | 服务器不支持请求的功能,无法完成请求。 |
| BAD_GATEWAY | 502 | 充当网关或代理的服务器,从远端服务器接收到了一个无效的请求。 |
| UNAVAILABLE | 503 | 由于超载或系统维护,服务器暂时的无法处理客户端的请求。 |
| GATEWAY_TIMEOUT | 504 | 充当网关或代理的服务器,未及时从远端服务器获取请求。 |
| VERSION | 505 | 服务器请求的HTTP协议的版本。 |
## HttpResponse
request方法回调函数的返回值类型。
**系统能力**:以下各项对应的系统能力均为SystemCapability.Communication.NetStack。
| 名称 | 类型 | 必填 | 说明 |
| -------------------- | -------------------------------------------- | ---- | ------------------------------------------------------------ |
| result | string \| Object \| ArrayBuffer<sup>6+</sup> | 是 | HTTP请求根据响应头中Content-type类型返回对应的响应格式内容:<br />- application/json:返回JSON格式的字符串,如需HTTP响应具体内容,需开发者自行解析<br />- application/octet-stream:ArrayBuffer<br />- 其他:string |
| resultType<sup>9+</sup> | [HttpDataType](#httpdatatype9) | 是 | 返回值类型。 |
| responseCode | [ResponseCode](#responsecode) \| number | 是 | 回调函数执行成功时,此字段为[ResponseCode](#responsecode)。若执行失败,错误码将会从AsyncCallback中的err字段返回。 |
| header | Object | 是 | 发起HTTP请求返回来的响应头。当前返回的是JSON格式字符串,如需具体字段内容,需开发者自行解析。常见字段及解析方式如下:<br/>- Content-Type:header['Content-Type'];<br />- Status-Line:header['Status-Line'];<br />- Date:header.Date/header['Date'];<br />- Server:header.Server/header['Server']; |
| cookies<sup>8+</sup> | Array\<string\> | 是 | 服务器返回的 cookies。 |
## http.createHttpResponseCache<sup>9+</sup>
createHttpResponseCache(cacheSize?: number): HttpResponseCache
创建一个默认的对象来存储HTTP访问请求的响应。
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | --------------------------------------- | ---- | ---------- |
| cacheSize | number | 否 | 缓存大小最大为10\*1024\*1024(10MB),默认最大。 |
**返回值:**
| 类型 | 说明 |
| :---------- | :----------------------------------------------------------- |
| [HttpResponseCache](#httpresponsecache9) | 返回一个存储HTTP访问请求响应的对象。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300008 | Weird server reply |
| 2300009 | Access denied to remote resource |
| 2300016 | Error in the HTTP2 framing layer |
| 2300018 | Transferred a partial file |
| 2300023 | Failed writing received data to disk/application |
| 2300025 | Upload failed |
| 2300026 | Failed to open/read local data from file/application |
| 2300027 | Out of memory |
| 2300028 | Timeout was reached |
| 2300047 | Number of redirects hit maximum amount |
| 2300052 | Server returned nothing (no headers, no data) |
| 2300055 | Failed sending data to the peer |
| 2300056 | Failure when receiving data from the peer |
| 2300058 | Problem with the local SSL certificate |
| 2300059 | Couldn't use specified SSL cipher |
| 2300060 | SSL peer certificate or SSH remote key was not OK |
| 2300061 | Unrecognized or bad HTTP Content or Transfer-Encoding |
| 2300063 | Maximum file size exceeded |
| 2300070 | Disk full or allocation exceeded |
| 2300073 | Remote file already exists |
| 2300077 | Problem with the SSL CA cert (path? access rights?) |
| 2300078 | Remote file not found |
| 2300094 | An authentication function returned an error |
| 2300999 | Unknown Other Error |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
**示例:**
```js
import http from '@ohos.net.http';
let httpResponseCache = http.createHttpResponseCache();
```
## HttpResponseCache<sup>9+</sup>
存储HTTP访问请求响应的对象。
### flush<sup>9+</sup>
flush(callback: AsyncCallback\<void>): void
将缓存中的数据写入文件系统,以便在下一个HTTP请求中访问所有缓存数据,使用callback方式作为异步方法。
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | --------------------------------------- | ---- | ---------- |
| callback | AsyncCallback\<void> | 是 | 回调函数返回写入结果。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol |
| 2300008 | Weird server reply |
| 2300009 | Access denied to remote resource |
| 2300016 | Error in the HTTP2 framing layer |
| 2300018 | Transferred a partial file |
| 2300023 | Failed writing received data to disk/application |
| 2300025 | Upload failed |
| 2300026 | Failed to open/read local data from file/application |
| 2300027 | Out of memory |
| 2300028 | Timeout was reached |
| 2300047 | Number of redirects hit maximum amount |
| 2300052 | Server returned nothing (no headers, no data) |
| 2300055 | Failed sending data to the peer |
| 2300056 | Failure when receiving data from the peer |
| 2300058 | Problem with the local SSL certificate |
| 2300059 | Couldn't use specified SSL cipher |
| 2300060 | SSL peer certificate or SSH remote key was not OK |
| 2300061 | Unrecognized or bad HTTP Content or Transfer-Encoding |
| 2300063 | Maximum file size exceeded |
| 2300070 | Disk full or allocation exceeded |
| 2300073 | Remote file already exists |
| 2300077 | Problem with the SSL CA cert (path? access rights?) |
| 2300078 | Remote file not found |
| 2300094 | An authentication function returned an error |
| 2300999 | Unknown Other Error |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
**示例:**
```js
httpResponseCache.flush(err => {
if (err) {
console.log('flush fail');
return;
}
console.log('flush success');
});
```
### flush<sup>9+</sup>
flush(): Promise\<void>
将缓存中的数据写入文件系统,以便在下一个HTTP请求中访问所有缓存数据,使用Promise方式作为异步方法。
**系统能力**:SystemCapability.Communication.NetStack
**返回值:**
| 类型 | 说明 |
| --------------------------------- | ------------------------------------- |
| Promise\<void>> | 以Promise形式返回写入结果。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol |
| 2300008 | Weird server reply |
| 2300009 | Access denied to remote resource |
| 2300016 | Error in the HTTP2 framing layer |
| 2300018 | Transferred a partial file |
| 2300023 | Failed writing received data to disk/application |
| 2300025 | Upload failed |
| 2300026 | Failed to open/read local data from file/application |
| 2300027 | Out of memory |
| 2300028 | Timeout was reached |
| 2300047 | Number of redirects hit maximum amount |
| 2300052 | Server returned nothing (no headers, no data) |
| 2300055 | Failed sending data to the peer |
| 2300056 | Failure when receiving data from the peer |
| 2300058 | Problem with the local SSL certificate |
| 2300059 | Couldn't use specified SSL cipher |
| 2300060 | SSL peer certificate or SSH remote key was not OK |
| 2300061 | Unrecognized or bad HTTP Content or Transfer-Encoding |
| 2300063 | Maximum file size exceeded |
| 2300070 | Disk full or allocation exceeded |
| 2300073 | Remote file already exists |
| 2300077 | Problem with the SSL CA cert (path? access rights?) |
| 2300078 | Remote file not found |
| 2300094 | An authentication function returned an error |
| 2300999 | Unknown Other Error |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
**示例:**
```js
httpResponseCache.flush().then(() => {
console.log('flush success');
}).catch(err => {
console.log('flush fail');
});
```
### delete<sup>9+</sup>
delete(callback: AsyncCallback\<void>): void
禁用缓存并删除其中的数据,使用callback方式作为异步方法。
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | --------------------------------------- | ---- | ---------- |
| callback | AsyncCallback\<void> | 是 | 回调函数返回删除结果。|
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol |
| 2300003 | URL using bad/illegal format or missing URL |
| 2300005 | Couldn't resolve proxy name |
| 2300006 | Couldn't resolve host name |
| 2300007 | Couldn't connect to server |
| 2300008 | Weird server reply |
| 2300009 | Access denied to remote resource |
| 2300999 | Unknown Other Error |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
**示例:**
```js
httpResponseCache.delete(err => {
if (err) {
console.log('delete fail');
return;
}
console.log('delete success');
});
```
### delete<sup>9+</sup>
delete(): Promise\<void>
禁用缓存并删除其中的数据,使用Promise方式作为异步方法。
**系统能力**:SystemCapability.Communication.NetStack
**返回值:**
| 类型 | 说明 |
| --------------------------------- | ------------------------------------- |
| Promise\<void> | 以Promise形式返回删除结果。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300999 | Unknown Other Error |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
**示例:**
```js
httpResponseCache.delete().then(() => {
console.log('delete success');
}).catch(err => {
console.log('delete fail');
});
```
## HttpDataType<sup>9+</sup>
http的数据类型。
**系统能力**:SystemCapability.Communication.NetStack
| 名称 | 值 | 说明 |
| ------------------ | -- | ----------- |
| STRING | 0 | 字符串类型。 |
| OBJECT | 1 | 对象类型。 |
| ARRAY_BUFFER | 2 | 二进制数组类型。|
## HttpProtocol<sup>9+</sup>
http协议版本。
**系统能力**:SystemCapability.Communication.NetStack
| 名称 | 说明 |
| :-------- | :----------- |
| HTTP1_1 | 协议http1.1 |
| HTTP2 | 协议http2 |
# @ohos.net.http (数据请求)
本模块提供HTTP数据请求能力。应用可以通过HTTP发起一个数据请求,支持常见的GET、POST、OPTIONS、HEAD、PUT、DELETE、TRACE、CONNECT方法。
>**说明:**
>
>本模块首批接口从API version 6开始支持。后续版本的新增接口,采用上角标单独标记接口的起始版本。
>
## 导入模块
```js
import http from '@ohos.net.http';
```
## 完整示例
```js
import http from '@ohos.net.http';
// 每一个httpRequest对应一个HTTP请求任务,不可复用
let httpRequest = http.createHttp();
// 用于订阅HTTP响应头,此接口会比request请求先返回。可以根据业务需要订阅此消息
// 从API 8开始,使用on('headersReceive', Callback)替代on('headerReceive', AsyncCallback)。 8+
httpRequest.on('headersReceive', (header) => {
console.info('header: ' + JSON.stringify(header));
});
httpRequest.request(
// 填写HTTP请求的URL地址,可以带参数也可以不带参数。URL地址需要开发者自定义。请求的参数可以在extraData中指定
"EXAMPLE_URL",
{
method: http.RequestMethod.POST, // 可选,默认为http.RequestMethod.GET
// 开发者根据自身业务需要添加header字段
header: {
'Content-Type': 'application/json'
},
// 当使用POST请求时此字段用于传递内容
extraData: {
"data": "data to send",
},
expectDataType: http.HttpDataType.STRING, // 可选,指定返回数据的类型
usingCache: true, // 可选,默认为true
priority: 1, // 可选,默认为1
connectTimeout: 60000, // 可选,默认为60000ms
readTimeout: 60000, // 可选,默认为60000ms
usingProtocol: http.HttpProtocol.HTTP1_1, // 可选,协议类型默认值由系统自动指定
}, (err, data) => {
if (!err) {
// data.result为HTTP响应内容,可根据业务需要进行解析
console.info('Result:' + data.result);
console.info('code:' + data.responseCode);
// data.header为HTTP响应头,可根据业务需要进行解析
console.info('header:' + JSON.stringify(data.header));
console.info('cookies:' + data.cookies); // 8+
} else {
console.info('error:' + JSON.stringify(err));
// 当该请求使用完毕时,调用destroy方法主动销毁。
httpRequest.destroy();
}
}
);
```
## http.createHttp
createHttp\(\): HttpRequest
创建一个HTTP请求,里面包括发起请求、中断请求、订阅/取消订阅HTTP Response Header事件。每一个HttpRequest对象对应一个HTTP请求。如需发起多个HTTP请求,须为每个HTTP请求创建对应HttpRequest对象。
**系统能力**:SystemCapability.Communication.NetStack
**返回值:**
| 类型 | 说明 |
| :---------- | :----------------------------------------------------------- |
| HttpRequest | 返回一个HttpRequest对象,里面包括request、destroy、on和off方法。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300999 | Unknown Other Error. |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
**示例:**
```js
import http from '@ohos.net.http';
let httpRequest = http.createHttp();
```
## HttpRequest
HTTP请求任务。在调用HttpRequest的方法前,需要先通过[createHttp\(\)](#httpcreatehttp)创建一个任务。
### request
request\(url: string, callback: AsyncCallback\<HttpResponse\>\):void
根据URL地址,发起HTTP网络请求,使用callback方式作为异步方法。
**需要权限**:ohos.permission.INTERNET
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | ---------------------------------------------- | ---- | ----------------------- |
| url | string | 是 | 发起网络请求的URL地址。 |
| callback | AsyncCallback\<[HttpResponse](#httpresponse)\> | 是 | 回调函数。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol. |
| 2300003 | URL using bad/illegal format or missing URL. |
| 2300005 | Couldn't resolve proxy name. |
| 2300006 | Couldn't resolve host name. |
| 2300007 | Couldn't connect to server. |
| 2300052 | Server returned nothing (no headers, no data). |
| 2300999 | Unknown Other Error. |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
**示例:**
```js
httpRequest.request("EXAMPLE_URL", (err, data) => {
if (!err) {
console.info('Result:' + data.result);
console.info('code:' + data.responseCode);
console.info('header:' + JSON.stringify(data.header));
console.info('cookies:' + data.cookies); // 8+
} else {
console.info('error:' + JSON.stringify(err));
}
});
```
### request
request\(url: string, options: HttpRequestOptions, callback: AsyncCallback<HttpResponse\>\):void
根据URL地址和相关配置项,发起HTTP网络请求,使用callback方式作为异步方法。
**需要权限**:ohos.permission.INTERNET
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | ---------------------------------------------- | ---- | ----------------------------------------------- |
| url | string | 是 | 发起网络请求的URL地址。 |
| options | HttpRequestOptions | 是 | 参考[HttpRequestOptions](#httprequestoptions)。 |
| callback | AsyncCallback\<[HttpResponse](#httpresponse)\> | 是 | 回调函数。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol |
| 2300003 | URL using bad/illegal format or missing URL |
| 2300005 | Couldn't resolve proxy name |
| 2300006 | Couldn't resolve host name |
| 2300007 | Couldn't connect to server |
| 2300008 | Weird server reply |
| 2300009 | Access denied to remote resource |
| 2300999 | Unknown Other Error |
>**错误码说明:**
>HTTP 错误码映射关系:2300000 + curl错误码。更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)。
**示例:**
```js
httpRequest.request("EXAMPLE_URL",
{
method: http.RequestMethod.GET,
header: {
'Content-Type': 'application/json'
},
readTimeout: 60000,
connectTimeout: 60000
}, (err, data) => {
if (!err) {
console.info('Result:' + data.result);
console.info('code:' + data.responseCode);
console.info('header:' + JSON.stringify(data.header));
console.info('cookies:' + data.cookies); // 8+
console.info('header.Content-Type:' + data.header['Content-Type']);
console.info('header.Status-Line:' + data.header['Status-Line']);
} else {
console.info('error:' + JSON.stringify(err));
}
});
```
### request
request\(url: string, options? : HttpRequestOptions\): Promise<HttpResponse\>
根据URL地址,发起HTTP网络请求,使用Promise方式作为异步方法。
**需要权限**:ohos.permission.INTERNET
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| ------- | ------------------ | ---- | ----------------------------------------------- |
| url | string | 是 | 发起网络请求的URL地址。 |
| options | HttpRequestOptions | 否 | 参考[HttpRequestOptions](#httprequestoptions)。 |
**返回值:**
| 类型 | 说明 |
| :------------------------------------- | :-------------------------------- |
| Promise<[HttpResponse](#httpresponse)> | 以Promise形式返回发起请求的结果。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol |
| 2300003 | URL using bad/illegal format or missing URL |
| 2300005 | Couldn't resolve proxy name |
| 2300006 | Couldn't resolve host name |
| 2300007 | Couldn't connect to server |
| 2300009 | Access denied to remote resource |
| 2300025 | Upload failed |
| 2300028 | Timeout was reached |
| 2300058 | Problem with the local SSL certificate |
| 2300060 | SSL peer certificate or SSH remote key was not OK |
| 2300061 | Unrecognized or bad HTTP Content or Transfer-Encoding |
| 2300063 | Maximum file size exceeded |
| 2300077 | Problem with the SSL CA cert (path? access rights?) |
| 2300078 | Remote file not found |
| 2300999 | Unknown Other Error |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
**示例:**
```js
let promise = httpRequest.request("EXAMPLE_URL", {
method: http.RequestMethod.GET,
connectTimeout: 60000,
readTimeout: 60000,
header: {
'Content-Type': 'application/json'
}
});
promise.then((data) => {
console.info('Result:' + data.result);
console.info('code:' + data.responseCode);
console.info('header:' + JSON.stringify(data.header));
console.info('cookies:' + data.cookies); // 8+
console.info('header.Content-Type:' + data.header['Content-Type']);
console.info('header.Status-Line:' + data.header['Status-Line']);
}).catch((err) => {
console.info('error:' + JSON.stringify(err));
});
```
### destroy
destroy\(\): void
中断请求任务。
**系统能力**:SystemCapability.Communication.NetStack
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 2300999 | Unknown Other Error |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
**示例:**
```js
httpRequest.destroy();
```
### on\('headerReceive'\)
on\(type: 'headerReceive', callback: AsyncCallback<Object\>\): void
订阅HTTP Response Header 事件。
>![](public_sys-resources/icon-note.gif) **说明:**
>此接口已废弃,建议使用[on\('headersReceive'\)<sup>8+</sup>](#onheadersreceive8)替代。
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | ----------------------- | ---- | --------------------------------- |
| type | string | 是 | 订阅的事件类型,'headerReceive'。 |
| callback | AsyncCallback\<Object\> | 是 | 回调函数。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol |
| 2300003 | URL using bad/illegal format or missing URL |
| 2300005 | Couldn't resolve proxy name |
| 2300006 | Couldn't resolve host name |
| 2300007 | Couldn't connect to server |
| 2300008 | Weird server reply |
| 2300009 | Access denied to remote resource |
| 2300023 | Failed writing received data to disk/application |
| 2300025 | Upload failed |
| 2300027 | Out of memory |
| 2300028 | Timeout was reached |
| 2300052 | Server returned nothing (no headers, no data) |
| 2300056 | Failure when receiving data from the peer |
| 2300058 | Problem with the local SSL certificate |
| 2300060 | SSL peer certificate or SSH remote key was not OK |
| 2300061 | Unrecognized or bad HTTP Content or Transfer-Encoding |
| 2300063 | Maximum file size exceeded |
| 2300070 | Disk full or allocation exceeded |
| 2300077 | Problem with the SSL CA cert (path? access rights?) |
| 2300078 | Remote file not found |
| 2300999 | Unknown Other Error |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
**示例:**
```js
httpRequest.on('headerReceive', (err, data) => {
if (!err) {
console.info('header: ' + JSON.stringify(data));
} else {
console.info('error:' + JSON.stringify(err));
}
});
```
### off\('headerReceive'\)
off\(type: 'headerReceive', callback?: AsyncCallback<Object\>\): void
取消订阅HTTP Response Header 事件。
>![](public_sys-resources/icon-note.gif) **说明:**
>
>1. 此接口已废弃,建议使用[off\('headersReceive'\)<sup>8+</sup>](#offheadersreceive8)替代。
>
>2. 可以指定传入on中的callback取消一个订阅,也可以不指定callback清空所有订阅。
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | ----------------------- | ---- | ------------------------------------- |
| type | string | 是 | 取消订阅的事件类型,'headerReceive'。 |
| callback | AsyncCallback\<Object\> | 否 | 回调函数。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol |
| 2300003 | URL using bad/illegal format or missing URL |
| 2300005 | Couldn't resolve proxy name |
| 2300006 | Couldn't resolve host name |
| 2300007 | Couldn't connect to server |
| 2300008 | Weird server reply |
| 2300009 | Access denied to remote resource |
| 2300999 | Unknown Other Error |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
**示例:**
```js
httpRequest.off('headerReceive');
```
### on\('headersReceive'\)<sup>8+</sup>
on\(type: 'headersReceive', callback: Callback<Object\>\): void
订阅HTTP Response Header 事件。
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | ------------------ | ---- | ---------------------------------- |
| type | string | 是 | 订阅的事件类型:'headersReceive'。 |
| callback | Callback\<Object\> | 是 | 回调函数。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol |
| 2300003 | URL using bad/illegal format or missing URL |
| 2300005 | Couldn't resolve proxy name |
| 2300006 | Couldn't resolve host name |
| 2300007 | Couldn't connect to server |
| 2300008 | Weird server reply |
| 2300009 | Access denied to remote resource |
| 2300023 | Failed writing received data to disk/application |
| 2300025 | Upload failed |
| 2300027 | Out of memory |
| 2300028 | Timeout was reached |
| 2300052 | Server returned nothing (no headers, no data) |
| 2300056 | Failure when receiving data from the peer |
| 2300058 | Problem with the local SSL certificate |
| 2300060 | SSL peer certificate or SSH remote key was not OK |
| 2300061 | Unrecognized or bad HTTP Content or Transfer-Encoding |
| 2300063 | Maximum file size exceeded |
| 2300070 | Disk full or allocation exceeded |
| 2300077 | Problem with the SSL CA cert (path? access rights?) |
| 2300078 | Remote file not found |
| 2300999 | Unknown Other Error |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
**示例:**
```js
httpRequest.on('headersReceive', (header) => {
console.info('header: ' + JSON.stringify(header));
});
```
### off\('headersReceive'\)<sup>8+</sup>
off\(type: 'headersReceive', callback?: Callback<Object\>\): void
取消订阅HTTP Response Header 事件。
>![](public_sys-resources/icon-note.gif) **说明:**
>可以指定传入on中的callback取消一个订阅,也可以不指定callback清空所有订阅。
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | ------------------ | ---- | -------------------------------------- |
| type | string | 是 | 取消订阅的事件类型:'headersReceive'。 |
| callback | Callback\<Object\> | 否 | 回调函数。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol |
| 2300003 | URL using bad/illegal format or missing URL |
| 2300005 | Couldn't resolve proxy name |
| 2300006 | Couldn't resolve host name |
| 2300007 | Couldn't connect to server |
| 2300008 | Weird server reply |
| 2300009 | Access denied to remote resource |
| 2300999 | Unknown Other Error |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
**示例:**
```js
httpRequest.off('headersReceive');
```
### once\('headersReceive'\)<sup>8+</sup>
once\(type: 'headersReceive', callback: Callback<Object\>\): void
订阅HTTP Response Header 事件,但是只触发一次。一旦触发之后,订阅器就会被移除。使用callback方式作为异步方法。
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | ------------------ | ---- | ---------------------------------- |
| type | string | 是 | 订阅的事件类型:'headersReceive'。 |
| callback | Callback\<Object\> | 是 | 回调函数。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol |
| 2300003 | URL using bad/illegal format or missing URL |
| 2300005 | Couldn't resolve proxy name |
| 2300006 | Couldn't resolve host name |
| 2300007 | Couldn't connect to server |
| 2300008 | Weird server reply |
| 2300009 | Access denied to remote resource |
| 2300023 | Failed writing received data to disk/application |
| 2300025 | Upload failed |
| 2300027 | Out of memory |
| 2300028 | Timeout was reached |
| 2300052 | Server returned nothing (no headers, no data) |
| 2300056 | Failure when receiving data from the peer |
| 2300058 | Problem with the local SSL certificate |
| 2300060 | SSL peer certificate or SSH remote key was not OK |
| 2300061 | Unrecognized or bad HTTP Content or Transfer-Encoding |
| 2300063 | Maximum file size exceeded |
| 2300070 | Disk full or allocation exceeded |
| 2300077 | Problem with the SSL CA cert (path? access rights?) |
| 2300078 | Remote file not found |
| 2300999 | Unknown Other Error |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
**示例:**
```js
httpRequest.once('headersReceive', (header) => {
console.info('header: ' + JSON.stringify(header));
});
```
## HttpRequestOptions
发起请求可选参数的类型和取值范围。
**系统能力**:以下各项对应的系统能力均为SystemCapability.Communication.NetStack。
| 名称 | 类型 | 必填 | 说明 |
| -------------- | --------------------------------------------- | ---- | ------------------------------------------------------------ |
| method | [RequestMethod](#requestmethod) | 否 | 请求方式。 |
| extraData | string \| Object \| ArrayBuffer<sup>6+</sup> | 否 | 发送请求的额外数据。<br />- 当HTTP请求为POST、PUT等方法时,此字段为HTTP请求的content。<br />- 当HTTP请求为GET、OPTIONS、DELETE、TRACE、CONNECT等方法时,此字段为HTTP请求的参数补充,参数内容会拼接到URL中进行发送。<sup>6+</sup><br />- 开发者传入string对象,开发者需要自行编码,将编码后的string传入。<sup>6+</sup> |
| expectDataType<sup>9+</sup> | [HttpDataType](#httpdatatype9) | 否 | 指定返回数据的类型。如果设置了此参数,系统将优先返回指定的类型。 |
| usingCache<sup>9+</sup> | boolean | 否 | 是否使用缓存,默认为true。 |
| priority<sup>9+</sup> | number | 否 | 优先级,范围\[1,1000],默认是1。 |
| header | Object | 否 | HTTP请求头字段。默认{'Content-Type': 'application/json'}。 |
| readTimeout | number | 否 | 读取超时时间。单位为毫秒(ms),默认为60000ms。 |
| connectTimeout | number | 否 | 连接超时时间。单位为毫秒(ms),默认为60000ms。 |
| usingProtocol<sup>9+</sup> | [HttpProtocol](#httpprotocol9) | 否 | 使用协议。默认值由系统自动指定。 |
## RequestMethod
HTTP 请求方法。
**系统能力**:以下各项对应的系统能力均为SystemCapability.Communication.NetStack。
| 名称 | 值 | 说明 |
| :------ | ------- | :------------------ |
| OPTIONS | "OPTIONS" | HTTP 请求 OPTIONS。 |
| GET | "GET" | HTTP 请求 GET。 |
| HEAD | "HEAD" | HTTP 请求 HEAD。 |
| POST | "POST" | HTTP 请求 POST。 |
| PUT | "PUT" | HTTP 请求 PUT。 |
| DELETE | "DELETE" | HTTP 请求 DELETE。 |
| TRACE | "TRACE" | HTTP 请求 TRACE。 |
| CONNECT | "CONNECT" | HTTP 请求 CONNECT。 |
## ResponseCode
发起请求返回的响应码。
**系统能力**:以下各项对应的系统能力均为SystemCapability.Communication.NetStack。
| 名称 | 值 | 说明 |
| ----------------- | ---- | ------------------------------------------------------------ |
| OK | 200 | 请求成功。一般用于GET与POST请求。 |
| CREATED | 201 | 已创建。成功请求并创建了新的资源。 |
| ACCEPTED | 202 | 已接受。已经接受请求,但未处理完成。 |
| NOT_AUTHORITATIVE | 203 | 非授权信息。请求成功。 |
| NO_CONTENT | 204 | 无内容。服务器成功处理,但未返回内容。 |
| RESET | 205 | 重置内容。 |
| PARTIAL | 206 | 部分内容。服务器成功处理了部分GET请求。 |
| MULT_CHOICE | 300 | 多种选择。 |
| MOVED_PERM | 301 | 永久移动。请求的资源已被永久的移动到新URI,返回信息会包括新的URI,浏览器会自动定向到新URI。 |
| MOVED_TEMP | 302 | 临时移动。 |
| SEE_OTHER | 303 | 查看其它地址。 |
| NOT_MODIFIED | 304 | 未修改。 |
| USE_PROXY | 305 | 使用代理。 |
| BAD_REQUEST | 400 | 客户端请求的语法错误,服务器无法理解。 |
| UNAUTHORIZED | 401 | 请求要求用户的身份认证。 |
| PAYMENT_REQUIRED | 402 | 保留,将来使用。 |
| FORBIDDEN | 403 | 服务器理解请求客户端的请求,但是拒绝执行此请求。 |
| NOT_FOUND | 404 | 服务器无法根据客户端的请求找到资源(网页)。 |
| BAD_METHOD | 405 | 客户端请求中的方法被禁止。 |
| NOT_ACCEPTABLE | 406 | 服务器无法根据客户端请求的内容特性完成请求。 |
| PROXY_AUTH | 407 | 请求要求代理的身份认证。 |
| CLIENT_TIMEOUT | 408 | 请求时间过长,超时。 |
| CONFLICT | 409 | 服务器完成客户端的PUT请求是可能返回此代码,服务器处理请求时发生了冲突。 |
| GONE | 410 | 客户端请求的资源已经不存在。 |
| LENGTH_REQUIRED | 411 | 服务器无法处理客户端发送的不带Content-Length的请求信息。 |
| PRECON_FAILED | 412 | 客户端请求信息的先决条件错误。 |
| ENTITY_TOO_LARGE | 413 | 由于请求的实体过大,服务器无法处理,因此拒绝请求。 |
| REQ_TOO_LONG | 414 | 请求的URI过长(URI通常为网址),服务器无法处理。 |
| UNSUPPORTED_TYPE | 415 | 服务器无法处理请求的格式。 |
| INTERNAL_ERROR | 500 | 服务器内部错误,无法完成请求。 |
| NOT_IMPLEMENTED | 501 | 服务器不支持请求的功能,无法完成请求。 |
| BAD_GATEWAY | 502 | 充当网关或代理的服务器,从远端服务器接收到了一个无效的请求。 |
| UNAVAILABLE | 503 | 由于超载或系统维护,服务器暂时的无法处理客户端的请求。 |
| GATEWAY_TIMEOUT | 504 | 充当网关或代理的服务器,未及时从远端服务器获取请求。 |
| VERSION | 505 | 服务器请求的HTTP协议的版本。 |
## HttpResponse
request方法回调函数的返回值类型。
**系统能力**:以下各项对应的系统能力均为SystemCapability.Communication.NetStack。
| 名称 | 类型 | 必填 | 说明 |
| -------------------- | -------------------------------------------- | ---- | ------------------------------------------------------------ |
| result | string \| Object \| ArrayBuffer<sup>6+</sup> | 是 | HTTP请求根据响应头中Content-type类型返回对应的响应格式内容:<br />- application/json:返回JSON格式的字符串,如需HTTP响应具体内容,需开发者自行解析<br />- application/octet-stream:ArrayBuffer<br />- 其他:string |
| resultType<sup>9+</sup> | [HttpDataType](#httpdatatype9) | 是 | 返回值类型。 |
| responseCode | [ResponseCode](#responsecode) \| number | 是 | 回调函数执行成功时,此字段为[ResponseCode](#responsecode)。若执行失败,错误码将会从AsyncCallback中的err字段返回。 |
| header | Object | 是 | 发起HTTP请求返回来的响应头。当前返回的是JSON格式字符串,如需具体字段内容,需开发者自行解析。常见字段及解析方式如下:<br/>- Content-Type:header['Content-Type'];<br />- Status-Line:header['Status-Line'];<br />- Date:header.Date/header['Date'];<br />- Server:header.Server/header['Server']; |
| cookies<sup>8+</sup> | Array\<string\> | 是 | 服务器返回的 cookies。 |
## http.createHttpResponseCache<sup>9+</sup>
createHttpResponseCache(cacheSize?: number): HttpResponseCache
创建一个默认的对象来存储HTTP访问请求的响应。
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | --------------------------------------- | ---- | ---------- |
| cacheSize | number | 否 | 缓存大小最大为10\*1024\*1024(10MB),默认最大。 |
**返回值:**
| 类型 | 说明 |
| :---------- | :----------------------------------------------------------- |
| [HttpResponseCache](#httpresponsecache9) | 返回一个存储HTTP访问请求响应的对象。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300008 | Weird server reply |
| 2300009 | Access denied to remote resource |
| 2300016 | Error in the HTTP2 framing layer |
| 2300018 | Transferred a partial file |
| 2300023 | Failed writing received data to disk/application |
| 2300025 | Upload failed |
| 2300026 | Failed to open/read local data from file/application |
| 2300027 | Out of memory |
| 2300028 | Timeout was reached |
| 2300047 | Number of redirects hit maximum amount |
| 2300052 | Server returned nothing (no headers, no data) |
| 2300055 | Failed sending data to the peer |
| 2300056 | Failure when receiving data from the peer |
| 2300058 | Problem with the local SSL certificate |
| 2300059 | Couldn't use specified SSL cipher |
| 2300060 | SSL peer certificate or SSH remote key was not OK |
| 2300061 | Unrecognized or bad HTTP Content or Transfer-Encoding |
| 2300063 | Maximum file size exceeded |
| 2300070 | Disk full or allocation exceeded |
| 2300073 | Remote file already exists |
| 2300077 | Problem with the SSL CA cert (path? access rights?) |
| 2300078 | Remote file not found |
| 2300094 | An authentication function returned an error |
| 2300999 | Unknown Other Error |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
**示例:**
```js
import http from '@ohos.net.http';
let httpResponseCache = http.createHttpResponseCache();
```
## HttpResponseCache<sup>9+</sup>
存储HTTP访问请求响应的对象。
### flush<sup>9+</sup>
flush(callback: AsyncCallback\<void>): void
将缓存中的数据写入文件系统,以便在下一个HTTP请求中访问所有缓存数据,使用callback方式作为异步方法。
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | --------------------------------------- | ---- | ---------- |
| callback | AsyncCallback\<void> | 是 | 回调函数返回写入结果。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol |
| 2300008 | Weird server reply |
| 2300009 | Access denied to remote resource |
| 2300016 | Error in the HTTP2 framing layer |
| 2300018 | Transferred a partial file |
| 2300023 | Failed writing received data to disk/application |
| 2300025 | Upload failed |
| 2300026 | Failed to open/read local data from file/application |
| 2300027 | Out of memory |
| 2300028 | Timeout was reached |
| 2300047 | Number of redirects hit maximum amount |
| 2300052 | Server returned nothing (no headers, no data) |
| 2300055 | Failed sending data to the peer |
| 2300056 | Failure when receiving data from the peer |
| 2300058 | Problem with the local SSL certificate |
| 2300059 | Couldn't use specified SSL cipher |
| 2300060 | SSL peer certificate or SSH remote key was not OK |
| 2300061 | Unrecognized or bad HTTP Content or Transfer-Encoding |
| 2300063 | Maximum file size exceeded |
| 2300070 | Disk full or allocation exceeded |
| 2300073 | Remote file already exists |
| 2300077 | Problem with the SSL CA cert (path? access rights?) |
| 2300078 | Remote file not found |
| 2300094 | An authentication function returned an error |
| 2300999 | Unknown Other Error |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
**示例:**
```js
httpResponseCache.flush(err => {
if (err) {
console.log('flush fail');
return;
}
console.log('flush success');
});
```
### flush<sup>9+</sup>
flush(): Promise\<void>
将缓存中的数据写入文件系统,以便在下一个HTTP请求中访问所有缓存数据,使用Promise方式作为异步方法。
**系统能力**:SystemCapability.Communication.NetStack
**返回值:**
| 类型 | 说明 |
| --------------------------------- | ------------------------------------- |
| Promise\<void>> | 以Promise形式返回写入结果。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol |
| 2300008 | Weird server reply |
| 2300009 | Access denied to remote resource |
| 2300016 | Error in the HTTP2 framing layer |
| 2300018 | Transferred a partial file |
| 2300023 | Failed writing received data to disk/application |
| 2300025 | Upload failed |
| 2300026 | Failed to open/read local data from file/application |
| 2300027 | Out of memory |
| 2300028 | Timeout was reached |
| 2300047 | Number of redirects hit maximum amount |
| 2300052 | Server returned nothing (no headers, no data) |
| 2300055 | Failed sending data to the peer |
| 2300056 | Failure when receiving data from the peer |
| 2300058 | Problem with the local SSL certificate |
| 2300059 | Couldn't use specified SSL cipher |
| 2300060 | SSL peer certificate or SSH remote key was not OK |
| 2300061 | Unrecognized or bad HTTP Content or Transfer-Encoding |
| 2300063 | Maximum file size exceeded |
| 2300070 | Disk full or allocation exceeded |
| 2300073 | Remote file already exists |
| 2300077 | Problem with the SSL CA cert (path? access rights?) |
| 2300078 | Remote file not found |
| 2300094 | An authentication function returned an error |
| 2300999 | Unknown Other Error |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
**示例:**
```js
httpResponseCache.flush().then(() => {
console.log('flush success');
}).catch(err => {
console.log('flush fail');
});
```
### delete<sup>9+</sup>
delete(callback: AsyncCallback\<void>): void
禁用缓存并删除其中的数据,使用callback方式作为异步方法。
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | --------------------------------------- | ---- | ---------- |
| callback | AsyncCallback\<void> | 是 | 回调函数返回删除结果。|
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol |
| 2300003 | URL using bad/illegal format or missing URL |
| 2300005 | Couldn't resolve proxy name |
| 2300006 | Couldn't resolve host name |
| 2300007 | Couldn't connect to server |
| 2300008 | Weird server reply |
| 2300009 | Access denied to remote resource |
| 2300999 | Unknown Other Error |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
**示例:**
```js
httpResponseCache.delete(err => {
if (err) {
console.log('delete fail');
return;
}
console.log('delete success');
});
```
### delete<sup>9+</sup>
delete(): Promise\<void>
禁用缓存并删除其中的数据,使用Promise方式作为异步方法。
**系统能力**:SystemCapability.Communication.NetStack
**返回值:**
| 类型 | 说明 |
| --------------------------------- | ------------------------------------- |
| Promise\<void> | 以Promise形式返回删除结果。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300999 | Unknown Other Error |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
**示例:**
```js
httpResponseCache.delete().then(() => {
console.log('delete success');
}).catch(err => {
console.log('delete fail');
});
```
## HttpDataType<sup>9+</sup>
http的数据类型。
**系统能力**:SystemCapability.Communication.NetStack
| 名称 | 值 | 说明 |
| ------------------ | -- | ----------- |
| STRING | 0 | 字符串类型。 |
| OBJECT | 1 | 对象类型。 |
| ARRAY_BUFFER | 2 | 二进制数组类型。|
## HttpProtocol<sup>9+</sup>
http协议版本。
**系统能力**:SystemCapability.Communication.NetStack
| 名称 | 说明 |
| :-------- | :----------- |
| HTTP1_1 | 协议http1.1 |
| HTTP2 | 协议http2 |
# @ohos.net.http (数据请求)
本模块提供HTTP数据请求能力。应用可以通过HTTP发起一个数据请求,支持常见的GET、POST、OPTIONS、HEAD、PUT、DELETE、TRACE、CONNECT方法。
>**说明:**
>
>本模块首批接口从API version 6开始支持。后续版本的新增接口,采用上角标单独标记接口的起始版本。
>
## 导入模块
```js
import http from '@ohos.net.http';
```
## 完整示例
```js
import http from '@ohos.net.http';
// 每一个httpRequest对应一个HTTP请求任务,不可复用
let httpRequest = http.createHttp();
// 用于订阅HTTP响应头,此接口会比request请求先返回。可以根据业务需要订阅此消息
// 从API 8开始,使用on('headersReceive', Callback)替代on('headerReceive', AsyncCallback)。 8+
httpRequest.on('headersReceive', (header) => {
console.info('header: ' + JSON.stringify(header));
});
httpRequest.request(
// 填写HTTP请求的URL地址,可以带参数也可以不带参数。URL地址需要开发者自定义。请求的参数可以在extraData中指定
"EXAMPLE_URL",
{
method: http.RequestMethod.POST, // 可选,默认为http.RequestMethod.GET
// 开发者根据自身业务需要添加header字段
header: {
'Content-Type': 'application/json'
},
// 当使用POST请求时此字段用于传递内容
extraData: {
"data": "data to send",
},
expectDataType: http.HttpDataType.STRING, // 可选,指定返回数据的类型
usingCache: true, // 可选,默认为true
priority: 1, // 可选,默认为1
connectTimeout: 60000, // 可选,默认为60000ms
readTimeout: 60000, // 可选,默认为60000ms
usingProtocol: http.HttpProtocol.HTTP1_1, // 可选,协议类型默认值由系统自动指定
}, (err, data) => {
if (!err) {
// data.result为HTTP响应内容,可根据业务需要进行解析
console.info('Result:' + data.result);
console.info('code:' + data.responseCode);
// data.header为HTTP响应头,可根据业务需要进行解析
console.info('header:' + JSON.stringify(data.header));
console.info('cookies:' + data.cookies); // 8+
} else {
console.info('error:' + JSON.stringify(err));
// 当该请求使用完毕时,调用destroy方法主动销毁。
httpRequest.destroy();
}
}
);
```
## http.createHttp
createHttp\(\): HttpRequest
创建一个HTTP请求,里面包括发起请求、中断请求、订阅/取消订阅HTTP Response Header事件。每一个HttpRequest对象对应一个HTTP请求。如需发起多个HTTP请求,须为每个HTTP请求创建对应HttpRequest对象。
**系统能力**:SystemCapability.Communication.NetStack
**返回值:**
| 类型 | 说明 |
| :---------- | :----------------------------------------------------------- |
| HttpRequest | 返回一个HttpRequest对象,里面包括request、destroy、on和off方法。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 2300999 | Unknown Other Error. |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
**示例:**
```js
import http from '@ohos.net.http';
let httpRequest = http.createHttp();
```
## HttpRequest
HTTP请求任务。在调用HttpRequest的方法前,需要先通过[createHttp\(\)](#httpcreatehttp)创建一个任务。
### request
request\(url: string, callback: AsyncCallback\<HttpResponse\>\):void
根据URL地址,发起HTTP网络请求,使用callback方式作为异步方法。
**需要权限**:ohos.permission.INTERNET
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | ---------------------------------------------- | ---- | ----------------------- |
| url | string | 是 | 发起网络请求的URL地址。 |
| callback | AsyncCallback\<[HttpResponse](#httpresponse)\> | 是 | 回调函数。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300008 | Weird server reply. |
| 2300009 | Access denied to remote resource. |
| 2300016 | Error in the HTTP2 framing layer. |
| 2300018 | Transferred a partial file. |
| 2300023 | Failed writing received data to disk/application. |
| 2300025 | Upload failed. |
| 2300026 | Failed to open/read local data from file/application. |
| 2300027 | Out of memory. |
| 2300028 | Timeout was reached. |
| 2300047 | Number of redirects hit maximum amount. |
| 2300052 | Server returned nothing (no headers, no data). |
| 2300055 | Failed sending data to the peer. |
| 2300056 | Failure when receiving data from the peer. |
| 2300058 | Problem with the local SSL certificate. |
| 2300059 | Couldn't use specified SSL cipher. |
| 2300060 | SSL peer certificate or SSH remote key was not OK. |
| 2300061 | Unrecognized or bad HTTP Content or Transfer-Encoding.|
| 2300063 | Maximum file size exceeded. |
| 2300070 | Disk full or allocation exceeded. |
| 2300073 | Remote file already exists. |
| 2300077 | Problem with the SSL CA cert (path? access rights?). |
| 2300078 | Remote file not found. |
| 2300094 | An authentication function returned an error. |
| 2300999 | Unknown Other Error. |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
**示例:**
```js
httpRequest.request("EXAMPLE_URL", (err, data) => {
if (!err) {
console.info('Result:' + data.result);
console.info('code:' + data.responseCode);
console.info('header:' + JSON.stringify(data.header));
console.info('cookies:' + data.cookies); // 8+
} else {
console.info('error:' + JSON.stringify(err));
}
});
```
### request
request\(url: string, options: HttpRequestOptions, callback: AsyncCallback<HttpResponse\>\):void
根据URL地址和相关配置项,发起HTTP网络请求,使用callback方式作为异步方法。
**需要权限**:ohos.permission.INTERNET
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | ---------------------------------------------- | ---- | ----------------------------------------------- |
| url | string | 是 | 发起网络请求的URL地址。 |
| options | HttpRequestOptions | 是 | 参考[HttpRequestOptions](#httprequestoptions)。 |
| callback | AsyncCallback\<[HttpResponse](#httpresponse)\> | 是 | 回调函数。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol |
| 2300003 | URL using bad/illegal format or missing URL |
| 2300005 | Couldn't resolve proxy name |
| 2300006 | Couldn't resolve host name |
| 2300007 | Couldn't connect to server |
| 2300008 | Weird server reply |
| 2300009 | Access denied to remote resource |
| 2300999 | Unknown Other Error |
>**错误码说明:**
>HTTP 错误码映射关系:2300000 + curl错误码。更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)。
**示例:**
```js
httpRequest.request("EXAMPLE_URL",
{
method: http.RequestMethod.GET,
header: {
'Content-Type': 'application/json'
},
readTimeout: 60000,
connectTimeout: 60000
}, (err, data) => {
if (!err) {
console.info('Result:' + data.result);
console.info('code:' + data.responseCode);
console.info('header:' + JSON.stringify(data.header));
console.info('cookies:' + data.cookies); // 8+
console.info('header.Content-Type:' + data.header['Content-Type']);
console.info('header.Status-Line:' + data.header['Status-Line']);
} else {
console.info('error:' + JSON.stringify(err));
}
});
```
### request
request\(url: string, options? : HttpRequestOptions\): Promise<HttpResponse\>
根据URL地址,发起HTTP网络请求,使用Promise方式作为异步方法。
**需要权限**:ohos.permission.INTERNET
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| ------- | ------------------ | ---- | ----------------------------------------------- |
| url | string | 是 | 发起网络请求的URL地址。 |
| options | HttpRequestOptions | 否 | 参考[HttpRequestOptions](#httprequestoptions)。 |
**返回值:**
| 类型 | 说明 |
| :------------------------------------- | :-------------------------------- |
| Promise<[HttpResponse](#httpresponse)> | 以Promise形式返回发起请求的结果。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol |
| 2300003 | URL using bad/illegal format or missing URL |
| 2300005 | Couldn't resolve proxy name |
| 2300006 | Couldn't resolve host name |
| 2300007 | Couldn't connect to server |
| 2300009 | Access denied to remote resource |
| 2300025 | Upload failed |
| 2300028 | Timeout was reached |
| 2300058 | Problem with the local SSL certificate |
| 2300060 | SSL peer certificate or SSH remote key was not OK |
| 2300061 | Unrecognized or bad HTTP Content or Transfer-Encoding |
| 2300063 | Maximum file size exceeded |
| 2300077 | Problem with the SSL CA cert (path? access rights?) |
| 2300078 | Remote file not found |
| 2300999 | Unknown Other Error |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
**示例:**
```js
let promise = httpRequest.request("EXAMPLE_URL", {
method: http.RequestMethod.GET,
connectTimeout: 60000,
readTimeout: 60000,
header: {
'Content-Type': 'application/json'
}
});
promise.then((data) => {
console.info('Result:' + data.result);
console.info('code:' + data.responseCode);
console.info('header:' + JSON.stringify(data.header));
console.info('cookies:' + data.cookies); // 8+
console.info('header.Content-Type:' + data.header['Content-Type']);
console.info('header.Status-Line:' + data.header['Status-Line']);
}).catch((err) => {
console.info('error:' + JSON.stringify(err));
});
```
### destroy
destroy\(\): void
中断请求任务。
**系统能力**:SystemCapability.Communication.NetStack
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 2300999 | Unknown Other Error |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
**示例:**
```js
httpRequest.destroy();
```
### on\('headerReceive'\)
on\(type: 'headerReceive', callback: AsyncCallback<Object\>\): void
订阅HTTP Response Header 事件。
>![](public_sys-resources/icon-note.gif) **说明:**
>此接口已废弃,建议使用[on\('headersReceive'\)<sup>8+</sup>](#onheadersreceive8)替代。
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | ----------------------- | ---- | --------------------------------- |
| type | string | 是 | 订阅的事件类型,'headerReceive'。 |
| callback | AsyncCallback\<Object\> | 是 | 回调函数。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol |
| 2300003 | URL using bad/illegal format or missing URL |
| 2300005 | Couldn't resolve proxy name |
| 2300006 | Couldn't resolve host name |
| 2300007 | Couldn't connect to server |
| 2300008 | Weird server reply |
| 2300009 | Access denied to remote resource |
| 2300023 | Failed writing received data to disk/application |
| 2300025 | Upload failed |
| 2300027 | Out of memory |
| 2300028 | Timeout was reached |
| 2300052 | Server returned nothing (no headers, no data) |
| 2300056 | Failure when receiving data from the peer |
| 2300058 | Problem with the local SSL certificate |
| 2300060 | SSL peer certificate or SSH remote key was not OK |
| 2300061 | Unrecognized or bad HTTP Content or Transfer-Encoding |
| 2300063 | Maximum file size exceeded |
| 2300070 | Disk full or allocation exceeded |
| 2300077 | Problem with the SSL CA cert (path? access rights?) |
| 2300078 | Remote file not found |
| 2300999 | Unknown Other Error |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
**示例:**
```js
httpRequest.on('headerReceive', (err, data) => {
if (!err) {
console.info('header: ' + JSON.stringify(data));
} else {
console.info('error:' + JSON.stringify(err));
}
});
```
### off\('headerReceive'\)
off\(type: 'headerReceive', callback?: AsyncCallback<Object\>\): void
取消订阅HTTP Response Header 事件。
>![](public_sys-resources/icon-note.gif) **说明:**
>
>1. 此接口已废弃,建议使用[off\('headersReceive'\)<sup>8+</sup>](#offheadersreceive8)替代。
>
>2. 可以指定传入on中的callback取消一个订阅,也可以不指定callback清空所有订阅。
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | ----------------------- | ---- | ------------------------------------- |
| type | string | 是 | 取消订阅的事件类型,'headerReceive'。 |
| callback | AsyncCallback\<Object\> | 否 | 回调函数。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol |
| 2300003 | URL using bad/illegal format or missing URL |
| 2300005 | Couldn't resolve proxy name |
| 2300006 | Couldn't resolve host name |
| 2300007 | Couldn't connect to server |
| 2300008 | Weird server reply |
| 2300009 | Access denied to remote resource |
| 2300999 | Unknown Other Error |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
**示例:**
```js
httpRequest.off('headerReceive');
```
### on\('headersReceive'\)<sup>8+</sup>
on\(type: 'headersReceive', callback: Callback<Object\>\): void
订阅HTTP Response Header 事件。
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | ------------------ | ---- | ---------------------------------- |
| type | string | 是 | 订阅的事件类型:'headersReceive'。 |
| callback | Callback\<Object\> | 是 | 回调函数。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol |
| 2300003 | URL using bad/illegal format or missing URL |
| 2300005 | Couldn't resolve proxy name |
| 2300006 | Couldn't resolve host name |
| 2300007 | Couldn't connect to server |
| 2300008 | Weird server reply |
| 2300009 | Access denied to remote resource |
| 2300023 | Failed writing received data to disk/application |
| 2300025 | Upload failed |
| 2300027 | Out of memory |
| 2300028 | Timeout was reached |
| 2300052 | Server returned nothing (no headers, no data) |
| 2300056 | Failure when receiving data from the peer |
| 2300058 | Problem with the local SSL certificate |
| 2300060 | SSL peer certificate or SSH remote key was not OK |
| 2300061 | Unrecognized or bad HTTP Content or Transfer-Encoding |
| 2300063 | Maximum file size exceeded |
| 2300070 | Disk full or allocation exceeded |
| 2300077 | Problem with the SSL CA cert (path? access rights?) |
| 2300078 | Remote file not found |
| 2300999 | Unknown Other Error |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
**示例:**
```js
httpRequest.on('headersReceive', (header) => {
console.info('header: ' + JSON.stringify(header));
});
```
### off\('headersReceive'\)<sup>8+</sup>
off\(type: 'headersReceive', callback?: Callback<Object\>\): void
取消订阅HTTP Response Header 事件。
>![](public_sys-resources/icon-note.gif) **说明:**
>可以指定传入on中的callback取消一个订阅,也可以不指定callback清空所有订阅。
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | ------------------ | ---- | -------------------------------------- |
| type | string | 是 | 取消订阅的事件类型:'headersReceive'。 |
| callback | Callback\<Object\> | 否 | 回调函数。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol |
| 2300003 | URL using bad/illegal format or missing URL |
| 2300005 | Couldn't resolve proxy name |
| 2300006 | Couldn't resolve host name |
| 2300007 | Couldn't connect to server |
| 2300008 | Weird server reply |
| 2300009 | Access denied to remote resource |
| 2300999 | Unknown Other Error |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
**示例:**
```js
httpRequest.off('headersReceive');
```
### once\('headersReceive'\)<sup>8+</sup>
once\(type: 'headersReceive', callback: Callback<Object\>\): void
订阅HTTP Response Header 事件,但是只触发一次。一旦触发之后,订阅器就会被移除。使用callback方式作为异步方法。
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | ------------------ | ---- | ---------------------------------- |
| type | string | 是 | 订阅的事件类型:'headersReceive'。 |
| callback | Callback\<Object\> | 是 | 回调函数。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol |
| 2300003 | URL using bad/illegal format or missing URL |
| 2300005 | Couldn't resolve proxy name |
| 2300006 | Couldn't resolve host name |
| 2300007 | Couldn't connect to server |
| 2300008 | Weird server reply |
| 2300009 | Access denied to remote resource |
| 2300023 | Failed writing received data to disk/application |
| 2300025 | Upload failed |
| 2300027 | Out of memory |
| 2300028 | Timeout was reached |
| 2300052 | Server returned nothing (no headers, no data) |
| 2300056 | Failure when receiving data from the peer |
| 2300058 | Problem with the local SSL certificate |
| 2300060 | SSL peer certificate or SSH remote key was not OK |
| 2300061 | Unrecognized or bad HTTP Content or Transfer-Encoding |
| 2300063 | Maximum file size exceeded |
| 2300070 | Disk full or allocation exceeded |
| 2300077 | Problem with the SSL CA cert (path? access rights?) |
| 2300078 | Remote file not found |
| 2300999 | Unknown Other Error |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
**示例:**
```js
httpRequest.once('headersReceive', (header) => {
console.info('header: ' + JSON.stringify(header));
});
```
## HttpRequestOptions
发起请求可选参数的类型和取值范围。
**系统能力**:以下各项对应的系统能力均为SystemCapability.Communication.NetStack。
| 名称 | 类型 | 必填 | 说明 |
| -------------- | --------------------------------------------- | ---- | ------------------------------------------------------------ |
| method | [RequestMethod](#requestmethod) | 否 | 请求方式。 |
| extraData | string \| Object \| ArrayBuffer<sup>6+</sup> | 否 | 发送请求的额外数据。<br />- 当HTTP请求为POST、PUT等方法时,此字段为HTTP请求的content。<br />- 当HTTP请求为GET、OPTIONS、DELETE、TRACE、CONNECT等方法时,此字段为HTTP请求的参数补充,参数内容会拼接到URL中进行发送。<sup>6+</sup><br />- 开发者传入string对象,开发者需要自行编码,将编码后的string传入。<sup>6+</sup> |
| expectDataType<sup>9+</sup> | [HttpDataType](#httpdatatype9) | 否 | 指定返回数据的类型。如果设置了此参数,系统将优先返回指定的类型。 |
| usingCache<sup>9+</sup> | boolean | 否 | 是否使用缓存,默认为true。 |
| priority<sup>9+</sup> | number | 否 | 优先级,范围\[1,1000],默认是1。 |
| header | Object | 否 | HTTP请求头字段。默认{'Content-Type': 'application/json'}。 |
| readTimeout | number | 否 | 读取超时时间。单位为毫秒(ms),默认为60000ms。 |
| connectTimeout | number | 否 | 连接超时时间。单位为毫秒(ms),默认为60000ms。 |
| usingProtocol<sup>9+</sup> | [HttpProtocol](#httpprotocol9) | 否 | 使用协议。默认值由系统自动指定。 |
## RequestMethod
HTTP 请求方法。
**系统能力**:以下各项对应的系统能力均为SystemCapability.Communication.NetStack。
| 名称 | 值 | 说明 |
| :------ | ------- | :------------------ |
| OPTIONS | "OPTIONS" | HTTP 请求 OPTIONS。 |
| GET | "GET" | HTTP 请求 GET。 |
| HEAD | "HEAD" | HTTP 请求 HEAD。 |
| POST | "POST" | HTTP 请求 POST。 |
| PUT | "PUT" | HTTP 请求 PUT。 |
| DELETE | "DELETE" | HTTP 请求 DELETE。 |
| TRACE | "TRACE" | HTTP 请求 TRACE。 |
| CONNECT | "CONNECT" | HTTP 请求 CONNECT。 |
## ResponseCode
发起请求返回的响应码。
**系统能力**:以下各项对应的系统能力均为SystemCapability.Communication.NetStack。
| 名称 | 值 | 说明 |
| ----------------- | ---- | ------------------------------------------------------------ |
| OK | 200 | 请求成功。一般用于GET与POST请求。 |
| CREATED | 201 | 已创建。成功请求并创建了新的资源。 |
| ACCEPTED | 202 | 已接受。已经接受请求,但未处理完成。 |
| NOT_AUTHORITATIVE | 203 | 非授权信息。请求成功。 |
| NO_CONTENT | 204 | 无内容。服务器成功处理,但未返回内容。 |
| RESET | 205 | 重置内容。 |
| PARTIAL | 206 | 部分内容。服务器成功处理了部分GET请求。 |
| MULT_CHOICE | 300 | 多种选择。 |
| MOVED_PERM | 301 | 永久移动。请求的资源已被永久的移动到新URI,返回信息会包括新的URI,浏览器会自动定向到新URI。 |
| MOVED_TEMP | 302 | 临时移动。 |
| SEE_OTHER | 303 | 查看其它地址。 |
| NOT_MODIFIED | 304 | 未修改。 |
| USE_PROXY | 305 | 使用代理。 |
| BAD_REQUEST | 400 | 客户端请求的语法错误,服务器无法理解。 |
| UNAUTHORIZED | 401 | 请求要求用户的身份认证。 |
| PAYMENT_REQUIRED | 402 | 保留,将来使用。 |
| FORBIDDEN | 403 | 服务器理解请求客户端的请求,但是拒绝执行此请求。 |
| NOT_FOUND | 404 | 服务器无法根据客户端的请求找到资源(网页)。 |
| BAD_METHOD | 405 | 客户端请求中的方法被禁止。 |
| NOT_ACCEPTABLE | 406 | 服务器无法根据客户端请求的内容特性完成请求。 |
| PROXY_AUTH | 407 | 请求要求代理的身份认证。 |
| CLIENT_TIMEOUT | 408 | 请求时间过长,超时。 |
| CONFLICT | 409 | 服务器完成客户端的PUT请求是可能返回此代码,服务器处理请求时发生了冲突。 |
| GONE | 410 | 客户端请求的资源已经不存在。 |
| LENGTH_REQUIRED | 411 | 服务器无法处理客户端发送的不带Content-Length的请求信息。 |
| PRECON_FAILED | 412 | 客户端请求信息的先决条件错误。 |
| ENTITY_TOO_LARGE | 413 | 由于请求的实体过大,服务器无法处理,因此拒绝请求。 |
| REQ_TOO_LONG | 414 | 请求的URI过长(URI通常为网址),服务器无法处理。 |
| UNSUPPORTED_TYPE | 415 | 服务器无法处理请求的格式。 |
| INTERNAL_ERROR | 500 | 服务器内部错误,无法完成请求。 |
| NOT_IMPLEMENTED | 501 | 服务器不支持请求的功能,无法完成请求。 |
| BAD_GATEWAY | 502 | 充当网关或代理的服务器,从远端服务器接收到了一个无效的请求。 |
| UNAVAILABLE | 503 | 由于超载或系统维护,服务器暂时的无法处理客户端的请求。 |
| GATEWAY_TIMEOUT | 504 | 充当网关或代理的服务器,未及时从远端服务器获取请求。 |
| VERSION | 505 | 服务器请求的HTTP协议的版本。 |
## HttpResponse
request方法回调函数的返回值类型。
**系统能力**:以下各项对应的系统能力均为SystemCapability.Communication.NetStack。
| 名称 | 类型 | 必填 | 说明 |
| -------------------- | -------------------------------------------- | ---- | ------------------------------------------------------------ |
| result | string \| Object \| ArrayBuffer<sup>6+</sup> | 是 | HTTP请求根据响应头中Content-type类型返回对应的响应格式内容:<br />- application/json:返回JSON格式的字符串,如需HTTP响应具体内容,需开发者自行解析<br />- application/octet-stream:ArrayBuffer<br />- 其他:string |
| resultType<sup>9+</sup> | [HttpDataType](#httpdatatype9) | 是 | 返回值类型。 |
| responseCode | [ResponseCode](#responsecode) \| number | 是 | 回调函数执行成功时,此字段为[ResponseCode](#responsecode)。若执行失败,错误码将会从AsyncCallback中的err字段返回。 |
| header | Object | 是 | 发起HTTP请求返回来的响应头。当前返回的是JSON格式字符串,如需具体字段内容,需开发者自行解析。常见字段及解析方式如下:<br/>- Content-Type:header['Content-Type'];<br />- Status-Line:header['Status-Line'];<br />- Date:header.Date/header['Date'];<br />- Server:header.Server/header['Server']; |
| cookies<sup>8+</sup> | Array\<string\> | 是 | 服务器返回的 cookies。 |
## http.createHttpResponseCache<sup>9+</sup>
createHttpResponseCache(cacheSize?: number): HttpResponseCache
创建一个默认的对象来存储HTTP访问请求的响应。
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | --------------------------------------- | ---- | ---------- |
| cacheSize | number | 否 | 缓存大小最大为10\*1024\*1024(10MB),默认最大。 |
**返回值:**
| 类型 | 说明 |
| :---------- | :----------------------------------------------------------- |
| [HttpResponseCache](#httpresponsecache9) | 返回一个存储HTTP访问请求响应的对象。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300008 | Weird server reply |
| 2300009 | Access denied to remote resource |
| 2300016 | Error in the HTTP2 framing layer |
| 2300018 | Transferred a partial file |
| 2300023 | Failed writing received data to disk/application |
| 2300025 | Upload failed |
| 2300026 | Failed to open/read local data from file/application |
| 2300027 | Out of memory |
| 2300028 | Timeout was reached |
| 2300047 | Number of redirects hit maximum amount |
| 2300052 | Server returned nothing (no headers, no data) |
| 2300055 | Failed sending data to the peer |
| 2300056 | Failure when receiving data from the peer |
| 2300058 | Problem with the local SSL certificate |
| 2300059 | Couldn't use specified SSL cipher |
| 2300060 | SSL peer certificate or SSH remote key was not OK |
| 2300061 | Unrecognized or bad HTTP Content or Transfer-Encoding |
| 2300063 | Maximum file size exceeded |
| 2300070 | Disk full or allocation exceeded |
| 2300073 | Remote file already exists |
| 2300077 | Problem with the SSL CA cert (path? access rights?) |
| 2300078 | Remote file not found |
| 2300094 | An authentication function returned an error |
| 2300999 | Unknown Other Error |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
**示例:**
```js
import http from '@ohos.net.http';
let httpResponseCache = http.createHttpResponseCache();
```
## HttpResponseCache<sup>9+</sup>
存储HTTP访问请求响应的对象。
### flush<sup>9+</sup>
flush(callback: AsyncCallback\<void>): void
将缓存中的数据写入文件系统,以便在下一个HTTP请求中访问所有缓存数据,使用callback方式作为异步方法。
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | --------------------------------------- | ---- | ---------- |
| callback | AsyncCallback\<void> | 是 | 回调函数返回写入结果。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol |
| 2300008 | Weird server reply |
| 2300009 | Access denied to remote resource |
| 2300016 | Error in the HTTP2 framing layer |
| 2300018 | Transferred a partial file |
| 2300023 | Failed writing received data to disk/application |
| 2300025 | Upload failed |
| 2300026 | Failed to open/read local data from file/application |
| 2300027 | Out of memory |
| 2300028 | Timeout was reached |
| 2300047 | Number of redirects hit maximum amount |
| 2300052 | Server returned nothing (no headers, no data) |
| 2300055 | Failed sending data to the peer |
| 2300056 | Failure when receiving data from the peer |
| 2300058 | Problem with the local SSL certificate |
| 2300059 | Couldn't use specified SSL cipher |
| 2300060 | SSL peer certificate or SSH remote key was not OK |
| 2300061 | Unrecognized or bad HTTP Content or Transfer-Encoding |
| 2300063 | Maximum file size exceeded |
| 2300070 | Disk full or allocation exceeded |
| 2300073 | Remote file already exists |
| 2300077 | Problem with the SSL CA cert (path? access rights?) |
| 2300078 | Remote file not found |
| 2300094 | An authentication function returned an error |
| 2300999 | Unknown Other Error |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
**示例:**
```js
httpResponseCache.flush(err => {
if (err) {
console.log('flush fail');
return;
}
console.log('flush success');
});
```
### flush<sup>9+</sup>
flush(): Promise\<void>
将缓存中的数据写入文件系统,以便在下一个HTTP请求中访问所有缓存数据,使用Promise方式作为异步方法。
**系统能力**:SystemCapability.Communication.NetStack
**返回值:**
| 类型 | 说明 |
| --------------------------------- | ------------------------------------- |
| Promise\<void>> | 以Promise形式返回写入结果。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol |
| 2300008 | Weird server reply |
| 2300009 | Access denied to remote resource |
| 2300016 | Error in the HTTP2 framing layer |
| 2300018 | Transferred a partial file |
| 2300023 | Failed writing received data to disk/application |
| 2300025 | Upload failed |
| 2300026 | Failed to open/read local data from file/application |
| 2300027 | Out of memory |
| 2300028 | Timeout was reached |
| 2300047 | Number of redirects hit maximum amount |
| 2300052 | Server returned nothing (no headers, no data) |
| 2300055 | Failed sending data to the peer |
| 2300056 | Failure when receiving data from the peer |
| 2300058 | Problem with the local SSL certificate |
| 2300059 | Couldn't use specified SSL cipher |
| 2300060 | SSL peer certificate or SSH remote key was not OK |
| 2300061 | Unrecognized or bad HTTP Content or Transfer-Encoding |
| 2300063 | Maximum file size exceeded |
| 2300070 | Disk full or allocation exceeded |
| 2300073 | Remote file already exists |
| 2300077 | Problem with the SSL CA cert (path? access rights?) |
| 2300078 | Remote file not found |
| 2300094 | An authentication function returned an error |
| 2300999 | Unknown Other Error |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
**示例:**
```js
httpResponseCache.flush().then(() => {
console.log('flush success');
}).catch(err => {
console.log('flush fail');
});
```
### delete<sup>9+</sup>
delete(callback: AsyncCallback\<void>): void
禁用缓存并删除其中的数据,使用callback方式作为异步方法。
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | --------------------------------------- | ---- | ---------- |
| callback | AsyncCallback\<void> | 是 | 回调函数返回删除结果。|
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol |
| 2300003 | URL using bad/illegal format or missing URL |
| 2300005 | Couldn't resolve proxy name |
| 2300006 | Couldn't resolve host name |
| 2300007 | Couldn't connect to server |
| 2300008 | Weird server reply |
| 2300009 | Access denied to remote resource |
| 2300999 | Unknown Other Error |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
**示例:**
```js
httpResponseCache.delete(err => {
if (err) {
console.log('delete fail');
return;
}
console.log('delete success');
});
```
### delete<sup>9+</sup>
delete(): Promise\<void>
禁用缓存并删除其中的数据,使用Promise方式作为异步方法。
**系统能力**:SystemCapability.Communication.NetStack
**返回值:**
| 类型 | 说明 |
| --------------------------------- | ------------------------------------- |
| Promise\<void> | 以Promise形式返回删除结果。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300999 | Unknown Other Error |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
**示例:**
```js
httpResponseCache.delete().then(() => {
console.log('delete success');
}).catch(err => {
console.log('delete fail');
});
```
## HttpDataType<sup>9+</sup>
http的数据类型。
**系统能力**:SystemCapability.Communication.NetStack
| 名称 | 值 | 说明 |
| ------------------ | -- | ----------- |
| STRING | 0 | 字符串类型。 |
| OBJECT | 1 | 对象类型。 |
| ARRAY_BUFFER | 2 | 二进制数组类型。|
## HttpProtocol<sup>9+</sup>
http协议版本。
**系统能力**:SystemCapability.Communication.NetStack
| 名称 | 说明 |
| :-------- | :----------- |
| HTTP1_1 | 协议http1.1 |
| HTTP2 | 协议http2 |
# @ohos.net.http (数据请求)
本模块提供HTTP数据请求能力。应用可以通过HTTP发起一个数据请求,支持常见的GET、POST、OPTIONS、HEAD、PUT、DELETE、TRACE、CONNECT方法。
>**说明:**
>
>本模块首批接口从API version 6开始支持。后续版本的新增接口,采用上角标单独标记接口的起始版本。
>
## 导入模块
```js
import http from '@ohos.net.http';
```
## 完整示例
```js
import http from '@ohos.net.http';
// 每一个httpRequest对应一个HTTP请求任务,不可复用
let httpRequest = http.createHttp();
// 用于订阅HTTP响应头,此接口会比request请求先返回。可以根据业务需要订阅此消息
// 从API 8开始,使用on('headersReceive', Callback)替代on('headerReceive', AsyncCallback)。 8+
httpRequest.on('headersReceive', (header) => {
console.info('header: ' + JSON.stringify(header));
});
httpRequest.request(
// 填写HTTP请求的URL地址,可以带参数也可以不带参数。URL地址需要开发者自定义。请求的参数可以在extraData中指定
"EXAMPLE_URL",
{
method: http.RequestMethod.POST, // 可选,默认为http.RequestMethod.GET
// 开发者根据自身业务需要添加header字段
header: {
'Content-Type': 'application/json'
},
// 当使用POST请求时此字段用于传递内容
extraData: {
"data": "data to send",
},
expectDataType: http.HttpDataType.STRING, // 可选,指定返回数据的类型
usingCache: true, // 可选,默认为true
priority: 1, // 可选,默认为1
connectTimeout: 60000, // 可选,默认为60000ms
readTimeout: 60000, // 可选,默认为60000ms
usingProtocol: http.HttpProtocol.HTTP1_1, // 可选,协议类型默认值由系统自动指定
}, (err, data) => {
if (!err) {
// data.result为HTTP响应内容,可根据业务需要进行解析
console.info('Result:' + data.result);
console.info('code:' + data.responseCode);
// data.header为HTTP响应头,可根据业务需要进行解析
console.info('header:' + JSON.stringify(data.header));
console.info('cookies:' + data.cookies); // 8+
} else {
console.info('error:' + JSON.stringify(err));
// 当该请求使用完毕时,调用destroy方法主动销毁。
httpRequest.destroy();
}
}
);
```
## http.createHttp
createHttp\(\): HttpRequest
创建一个HTTP请求,里面包括发起请求、中断请求、订阅/取消订阅HTTP Response Header事件。每一个HttpRequest对象对应一个HTTP请求。如需发起多个HTTP请求,须为每个HTTP请求创建对应HttpRequest对象。
**系统能力**:SystemCapability.Communication.NetStack
**返回值:**
| 类型 | 说明 |
| :---------- | :----------------------------------------------------------- |
| HttpRequest | 返回一个HttpRequest对象,里面包括request、destroy、on和off方法。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 2300999 | Unknown Other Error. |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
**示例:**
```js
import http from '@ohos.net.http';
let httpRequest = http.createHttp();
```
## HttpRequest
HTTP请求任务。在调用HttpRequest的方法前,需要先通过[createHttp\(\)](#httpcreatehttp)创建一个任务。
### request
request\(url: string, callback: AsyncCallback\<HttpResponse\>\):void
根据URL地址,发起HTTP网络请求,使用callback方式作为异步方法。
**需要权限**:ohos.permission.INTERNET
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | ---------------------------------------------- | ---- | ----------------------- |
| url | string | 是 | 发起网络请求的URL地址。 |
| callback | AsyncCallback\<[HttpResponse](#httpresponse)\> | 是 | 回调函数。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol. |
| 2300003 | URL using bad/illegal format or missing URL. |
| 2300005 | Couldn't resolve proxy name. |
| 2300006 | Couldn't resolve host name. |
| 2300007 | Couldn't connect to server. |
| 2300008 | Weird server reply. |
| 2300009 | Access denied to remote resource. |
| 2300016 | Error in the HTTP2 framing layer. |
| 2300018 | Transferred a partial file. |
| 2300023 | Failed writing received data to disk/application. |
| 2300025 | Upload failed. |
| 2300026 | Failed to open/read local data from file/application. |
| 2300027 | Out of memory. |
| 2300028 | Timeout was reached. |
| 2300047 | Number of redirects hit maximum amount. |
| 2300052 | Server returned nothing (no headers, no data). |
| 2300055 | Failed sending data to the peer. |
| 2300056 | Failure when receiving data from the peer. |
| 2300058 | Problem with the local SSL certificate. |
| 2300059 | Couldn't use specified SSL cipher. |
| 2300060 | SSL peer certificate or SSH remote key was not OK. |
| 2300061 | Unrecognized or bad HTTP Content or Transfer-Encoding.|
| 2300063 | Maximum file size exceeded. |
| 2300070 | Disk full or allocation exceeded. |
| 2300073 | Remote file already exists. |
| 2300077 | Problem with the SSL CA cert (path? access rights?). |
| 2300078 | Remote file not found. |
| 2300094 | An authentication function returned an error. |
| 2300999 | Unknown Other Error. |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
**示例:**
```js
httpRequest.request("EXAMPLE_URL", (err, data) => {
if (!err) {
console.info('Result:' + data.result);
console.info('code:' + data.responseCode);
console.info('header:' + JSON.stringify(data.header));
console.info('cookies:' + data.cookies); // 8+
} else {
console.info('error:' + JSON.stringify(err));
}
});
```
### request
request\(url: string, options: HttpRequestOptions, callback: AsyncCallback<HttpResponse\>\):void
根据URL地址和相关配置项,发起HTTP网络请求,使用callback方式作为异步方法。
**需要权限**:ohos.permission.INTERNET
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | ---------------------------------------------- | ---- | ----------------------------------------------- |
| url | string | 是 | 发起网络请求的URL地址。 |
| options | HttpRequestOptions | 是 | 参考[HttpRequestOptions](#httprequestoptions)。 |
| callback | AsyncCallback\<[HttpResponse](#httpresponse)\> | 是 | 回调函数。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol |
| 2300003 | URL using bad/illegal format or missing URL |
| 2300005 | Couldn't resolve proxy name |
| 2300006 | Couldn't resolve host name |
| 2300007 | Couldn't connect to server |
| 2300008 | Weird server reply |
| 2300009 | Access denied to remote resource |
| 2300999 | Unknown Other Error |
>**错误码说明:**
>HTTP 错误码映射关系:2300000 + curl错误码。更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)。
**示例:**
```js
httpRequest.request("EXAMPLE_URL",
{
method: http.RequestMethod.GET,
header: {
'Content-Type': 'application/json'
},
readTimeout: 60000,
connectTimeout: 60000
}, (err, data) => {
if (!err) {
console.info('Result:' + data.result);
console.info('code:' + data.responseCode);
console.info('header:' + JSON.stringify(data.header));
console.info('cookies:' + data.cookies); // 8+
console.info('header.Content-Type:' + data.header['Content-Type']);
console.info('header.Status-Line:' + data.header['Status-Line']);
} else {
console.info('error:' + JSON.stringify(err));
}
});
```
### request
request\(url: string, options? : HttpRequestOptions\): Promise<HttpResponse\>
根据URL地址,发起HTTP网络请求,使用Promise方式作为异步方法。
**需要权限**:ohos.permission.INTERNET
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| ------- | ------------------ | ---- | ----------------------------------------------- |
| url | string | 是 | 发起网络请求的URL地址。 |
| options | HttpRequestOptions | 否 | 参考[HttpRequestOptions](#httprequestoptions)。 |
**返回值:**
| 类型 | 说明 |
| :------------------------------------- | :-------------------------------- |
| Promise<[HttpResponse](#httpresponse)> | 以Promise形式返回发起请求的结果。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol |
| 2300003 | URL using bad/illegal format or missing URL |
| 2300005 | Couldn't resolve proxy name |
| 2300006 | Couldn't resolve host name |
| 2300007 | Couldn't connect to server |
| 2300009 | Access denied to remote resource |
| 2300025 | Upload failed |
| 2300028 | Timeout was reached |
| 2300058 | Problem with the local SSL certificate |
| 2300060 | SSL peer certificate or SSH remote key was not OK |
| 2300061 | Unrecognized or bad HTTP Content or Transfer-Encoding |
| 2300063 | Maximum file size exceeded |
| 2300077 | Problem with the SSL CA cert (path? access rights?) |
| 2300078 | Remote file not found |
| 2300999 | Unknown Other Error |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
**示例:**
```js
let promise = httpRequest.request("EXAMPLE_URL", {
method: http.RequestMethod.GET,
connectTimeout: 60000,
readTimeout: 60000,
header: {
'Content-Type': 'application/json'
}
});
promise.then((data) => {
console.info('Result:' + data.result);
console.info('code:' + data.responseCode);
console.info('header:' + JSON.stringify(data.header));
console.info('cookies:' + data.cookies); // 8+
console.info('header.Content-Type:' + data.header['Content-Type']);
console.info('header.Status-Line:' + data.header['Status-Line']);
}).catch((err) => {
console.info('error:' + JSON.stringify(err));
});
```
### destroy
destroy\(\): void
中断请求任务。
**系统能力**:SystemCapability.Communication.NetStack
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 2300999 | Unknown Other Error |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
**示例:**
```js
httpRequest.destroy();
```
### on\('headerReceive'\)
on\(type: 'headerReceive', callback: AsyncCallback<Object\>\): void
订阅HTTP Response Header 事件。
>![](public_sys-resources/icon-note.gif) **说明:**
>此接口已废弃,建议使用[on\('headersReceive'\)<sup>8+</sup>](#onheadersreceive8)替代。
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | ----------------------- | ---- | --------------------------------- |
| type | string | 是 | 订阅的事件类型,'headerReceive'。 |
| callback | AsyncCallback\<Object\> | 是 | 回调函数。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol |
| 2300003 | URL using bad/illegal format or missing URL |
| 2300005 | Couldn't resolve proxy name |
| 2300006 | Couldn't resolve host name |
| 2300007 | Couldn't connect to server |
| 2300008 | Weird server reply |
| 2300009 | Access denied to remote resource |
| 2300023 | Failed writing received data to disk/application |
| 2300025 | Upload failed |
| 2300027 | Out of memory |
| 2300028 | Timeout was reached |
| 2300052 | Server returned nothing (no headers, no data) |
| 2300056 | Failure when receiving data from the peer |
| 2300058 | Problem with the local SSL certificate |
| 2300060 | SSL peer certificate or SSH remote key was not OK |
| 2300061 | Unrecognized or bad HTTP Content or Transfer-Encoding |
| 2300063 | Maximum file size exceeded |
| 2300070 | Disk full or allocation exceeded |
| 2300077 | Problem with the SSL CA cert (path? access rights?) |
| 2300078 | Remote file not found |
| 2300999 | Unknown Other Error |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
**示例:**
```js
httpRequest.on('headerReceive', (err, data) => {
if (!err) {
console.info('header: ' + JSON.stringify(data));
} else {
console.info('error:' + JSON.stringify(err));
}
});
```
### off\('headerReceive'\)
off\(type: 'headerReceive', callback?: AsyncCallback<Object\>\): void
取消订阅HTTP Response Header 事件。
>![](public_sys-resources/icon-note.gif) **说明:**
>
>1. 此接口已废弃,建议使用[off\('headersReceive'\)<sup>8+</sup>](#offheadersreceive8)替代。
>
>2. 可以指定传入on中的callback取消一个订阅,也可以不指定callback清空所有订阅。
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | ----------------------- | ---- | ------------------------------------- |
| type | string | 是 | 取消订阅的事件类型,'headerReceive'。 |
| callback | AsyncCallback\<Object\> | 否 | 回调函数。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol |
| 2300003 | URL using bad/illegal format or missing URL |
| 2300005 | Couldn't resolve proxy name |
| 2300006 | Couldn't resolve host name |
| 2300007 | Couldn't connect to server |
| 2300008 | Weird server reply |
| 2300009 | Access denied to remote resource |
| 2300999 | Unknown Other Error |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
**示例:**
```js
httpRequest.off('headerReceive');
```
### on\('headersReceive'\)<sup>8+</sup>
on\(type: 'headersReceive', callback: Callback<Object\>\): void
订阅HTTP Response Header 事件。
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | ------------------ | ---- | ---------------------------------- |
| type | string | 是 | 订阅的事件类型:'headersReceive'。 |
| callback | Callback\<Object\> | 是 | 回调函数。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol |
| 2300003 | URL using bad/illegal format or missing URL |
| 2300005 | Couldn't resolve proxy name |
| 2300006 | Couldn't resolve host name |
| 2300007 | Couldn't connect to server |
| 2300008 | Weird server reply |
| 2300009 | Access denied to remote resource |
| 2300023 | Failed writing received data to disk/application |
| 2300025 | Upload failed |
| 2300027 | Out of memory |
| 2300028 | Timeout was reached |
| 2300052 | Server returned nothing (no headers, no data) |
| 2300056 | Failure when receiving data from the peer |
| 2300058 | Problem with the local SSL certificate |
| 2300060 | SSL peer certificate or SSH remote key was not OK |
| 2300061 | Unrecognized or bad HTTP Content or Transfer-Encoding |
| 2300063 | Maximum file size exceeded |
| 2300070 | Disk full or allocation exceeded |
| 2300077 | Problem with the SSL CA cert (path? access rights?) |
| 2300078 | Remote file not found |
| 2300999 | Unknown Other Error |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
**示例:**
```js
httpRequest.on('headersReceive', (header) => {
console.info('header: ' + JSON.stringify(header));
});
```
### off\('headersReceive'\)<sup>8+</sup>
off\(type: 'headersReceive', callback?: Callback<Object\>\): void
取消订阅HTTP Response Header 事件。
>![](public_sys-resources/icon-note.gif) **说明:**
>可以指定传入on中的callback取消一个订阅,也可以不指定callback清空所有订阅。
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | ------------------ | ---- | -------------------------------------- |
| type | string | 是 | 取消订阅的事件类型:'headersReceive'。 |
| callback | Callback\<Object\> | 否 | 回调函数。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol |
| 2300003 | URL using bad/illegal format or missing URL |
| 2300005 | Couldn't resolve proxy name |
| 2300006 | Couldn't resolve host name |
| 2300007 | Couldn't connect to server |
| 2300008 | Weird server reply |
| 2300009 | Access denied to remote resource |
| 2300999 | Unknown Other Error |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
**示例:**
```js
httpRequest.off('headersReceive');
```
### once\('headersReceive'\)<sup>8+</sup>
once\(type: 'headersReceive', callback: Callback<Object\>\): void
订阅HTTP Response Header 事件,但是只触发一次。一旦触发之后,订阅器就会被移除。使用callback方式作为异步方法。
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | ------------------ | ---- | ---------------------------------- |
| type | string | 是 | 订阅的事件类型:'headersReceive'。 |
| callback | Callback\<Object\> | 是 | 回调函数。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol |
| 2300003 | URL using bad/illegal format or missing URL |
| 2300005 | Couldn't resolve proxy name |
| 2300006 | Couldn't resolve host name |
| 2300007 | Couldn't connect to server |
| 2300008 | Weird server reply |
| 2300009 | Access denied to remote resource |
| 2300023 | Failed writing received data to disk/application |
| 2300025 | Upload failed |
| 2300027 | Out of memory |
| 2300028 | Timeout was reached |
| 2300052 | Server returned nothing (no headers, no data) |
| 2300056 | Failure when receiving data from the peer |
| 2300058 | Problem with the local SSL certificate |
| 2300060 | SSL peer certificate or SSH remote key was not OK |
| 2300061 | Unrecognized or bad HTTP Content or Transfer-Encoding |
| 2300063 | Maximum file size exceeded |
| 2300070 | Disk full or allocation exceeded |
| 2300077 | Problem with the SSL CA cert (path? access rights?) |
| 2300078 | Remote file not found |
| 2300999 | Unknown Other Error |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
**示例:**
```js
httpRequest.once('headersReceive', (header) => {
console.info('header: ' + JSON.stringify(header));
});
```
## HttpRequestOptions
发起请求可选参数的类型和取值范围。
**系统能力**:以下各项对应的系统能力均为SystemCapability.Communication.NetStack。
| 名称 | 类型 | 必填 | 说明 |
| -------------- | --------------------------------------------- | ---- | ------------------------------------------------------------ |
| method | [RequestMethod](#requestmethod) | 否 | 请求方式。 |
| extraData | string \| Object \| ArrayBuffer<sup>6+</sup> | 否 | 发送请求的额外数据。<br />- 当HTTP请求为POST、PUT等方法时,此字段为HTTP请求的content。<br />- 当HTTP请求为GET、OPTIONS、DELETE、TRACE、CONNECT等方法时,此字段为HTTP请求的参数补充,参数内容会拼接到URL中进行发送。<sup>6+</sup><br />- 开发者传入string对象,开发者需要自行编码,将编码后的string传入。<sup>6+</sup> |
| expectDataType<sup>9+</sup> | [HttpDataType](#httpdatatype9) | 否 | 指定返回数据的类型。如果设置了此参数,系统将优先返回指定的类型。 |
| usingCache<sup>9+</sup> | boolean | 否 | 是否使用缓存,默认为true。 |
| priority<sup>9+</sup> | number | 否 | 优先级,范围\[1,1000],默认是1。 |
| header | Object | 否 | HTTP请求头字段。默认{'Content-Type': 'application/json'}。 |
| readTimeout | number | 否 | 读取超时时间。单位为毫秒(ms),默认为60000ms。 |
| connectTimeout | number | 否 | 连接超时时间。单位为毫秒(ms),默认为60000ms。 |
| usingProtocol<sup>9+</sup> | [HttpProtocol](#httpprotocol9) | 否 | 使用协议。默认值由系统自动指定。 |
## RequestMethod
HTTP 请求方法。
**系统能力**:以下各项对应的系统能力均为SystemCapability.Communication.NetStack。
| 名称 | 值 | 说明 |
| :------ | ------- | :------------------ |
| OPTIONS | "OPTIONS" | HTTP 请求 OPTIONS。 |
| GET | "GET" | HTTP 请求 GET。 |
| HEAD | "HEAD" | HTTP 请求 HEAD。 |
| POST | "POST" | HTTP 请求 POST。 |
| PUT | "PUT" | HTTP 请求 PUT。 |
| DELETE | "DELETE" | HTTP 请求 DELETE。 |
| TRACE | "TRACE" | HTTP 请求 TRACE。 |
| CONNECT | "CONNECT" | HTTP 请求 CONNECT。 |
## ResponseCode
发起请求返回的响应码。
**系统能力**:以下各项对应的系统能力均为SystemCapability.Communication.NetStack。
| 名称 | 值 | 说明 |
| ----------------- | ---- | ------------------------------------------------------------ |
| OK | 200 | 请求成功。一般用于GET与POST请求。 |
| CREATED | 201 | 已创建。成功请求并创建了新的资源。 |
| ACCEPTED | 202 | 已接受。已经接受请求,但未处理完成。 |
| NOT_AUTHORITATIVE | 203 | 非授权信息。请求成功。 |
| NO_CONTENT | 204 | 无内容。服务器成功处理,但未返回内容。 |
| RESET | 205 | 重置内容。 |
| PARTIAL | 206 | 部分内容。服务器成功处理了部分GET请求。 |
| MULT_CHOICE | 300 | 多种选择。 |
| MOVED_PERM | 301 | 永久移动。请求的资源已被永久的移动到新URI,返回信息会包括新的URI,浏览器会自动定向到新URI。 |
| MOVED_TEMP | 302 | 临时移动。 |
| SEE_OTHER | 303 | 查看其它地址。 |
| NOT_MODIFIED | 304 | 未修改。 |
| USE_PROXY | 305 | 使用代理。 |
| BAD_REQUEST | 400 | 客户端请求的语法错误,服务器无法理解。 |
| UNAUTHORIZED | 401 | 请求要求用户的身份认证。 |
| PAYMENT_REQUIRED | 402 | 保留,将来使用。 |
| FORBIDDEN | 403 | 服务器理解请求客户端的请求,但是拒绝执行此请求。 |
| NOT_FOUND | 404 | 服务器无法根据客户端的请求找到资源(网页)。 |
| BAD_METHOD | 405 | 客户端请求中的方法被禁止。 |
| NOT_ACCEPTABLE | 406 | 服务器无法根据客户端请求的内容特性完成请求。 |
| PROXY_AUTH | 407 | 请求要求代理的身份认证。 |
| CLIENT_TIMEOUT | 408 | 请求时间过长,超时。 |
| CONFLICT | 409 | 服务器完成客户端的PUT请求是可能返回此代码,服务器处理请求时发生了冲突。 |
| GONE | 410 | 客户端请求的资源已经不存在。 |
| LENGTH_REQUIRED | 411 | 服务器无法处理客户端发送的不带Content-Length的请求信息。 |
| PRECON_FAILED | 412 | 客户端请求信息的先决条件错误。 |
| ENTITY_TOO_LARGE | 413 | 由于请求的实体过大,服务器无法处理,因此拒绝请求。 |
| REQ_TOO_LONG | 414 | 请求的URI过长(URI通常为网址),服务器无法处理。 |
| UNSUPPORTED_TYPE | 415 | 服务器无法处理请求的格式。 |
| INTERNAL_ERROR | 500 | 服务器内部错误,无法完成请求。 |
| NOT_IMPLEMENTED | 501 | 服务器不支持请求的功能,无法完成请求。 |
| BAD_GATEWAY | 502 | 充当网关或代理的服务器,从远端服务器接收到了一个无效的请求。 |
| UNAVAILABLE | 503 | 由于超载或系统维护,服务器暂时的无法处理客户端的请求。 |
| GATEWAY_TIMEOUT | 504 | 充当网关或代理的服务器,未及时从远端服务器获取请求。 |
| VERSION | 505 | 服务器请求的HTTP协议的版本。 |
## HttpResponse
request方法回调函数的返回值类型。
**系统能力**:以下各项对应的系统能力均为SystemCapability.Communication.NetStack。
| 名称 | 类型 | 必填 | 说明 |
| -------------------- | -------------------------------------------- | ---- | ------------------------------------------------------------ |
| result | string \| Object \| ArrayBuffer<sup>6+</sup> | 是 | HTTP请求根据响应头中Content-type类型返回对应的响应格式内容:<br />- application/json:返回JSON格式的字符串,如需HTTP响应具体内容,需开发者自行解析<br />- application/octet-stream:ArrayBuffer<br />- 其他:string |
| resultType<sup>9+</sup> | [HttpDataType](#httpdatatype9) | 是 | 返回值类型。 |
| responseCode | [ResponseCode](#responsecode) \| number | 是 | 回调函数执行成功时,此字段为[ResponseCode](#responsecode)。若执行失败,错误码将会从AsyncCallback中的err字段返回。 |
| header | Object | 是 | 发起HTTP请求返回来的响应头。当前返回的是JSON格式字符串,如需具体字段内容,需开发者自行解析。常见字段及解析方式如下:<br/>- Content-Type:header['Content-Type'];<br />- Status-Line:header['Status-Line'];<br />- Date:header.Date/header['Date'];<br />- Server:header.Server/header['Server']; |
| cookies<sup>8+</sup> | Array\<string\> | 是 | 服务器返回的 cookies。 |
## http.createHttpResponseCache<sup>9+</sup>
createHttpResponseCache(cacheSize?: number): HttpResponseCache
创建一个默认的对象来存储HTTP访问请求的响应。
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | --------------------------------------- | ---- | ---------- |
| cacheSize | number | 否 | 缓存大小最大为10\*1024\*1024(10MB),默认最大。 |
**返回值:**
| 类型 | 说明 |
| :---------- | :----------------------------------------------------------- |
| [HttpResponseCache](#httpresponsecache9) | 返回一个存储HTTP访问请求响应的对象。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300008 | Weird server reply |
| 2300009 | Access denied to remote resource |
| 2300016 | Error in the HTTP2 framing layer |
| 2300018 | Transferred a partial file |
| 2300023 | Failed writing received data to disk/application |
| 2300025 | Upload failed |
| 2300026 | Failed to open/read local data from file/application |
| 2300027 | Out of memory |
| 2300028 | Timeout was reached |
| 2300047 | Number of redirects hit maximum amount |
| 2300052 | Server returned nothing (no headers, no data) |
| 2300055 | Failed sending data to the peer |
| 2300056 | Failure when receiving data from the peer |
| 2300058 | Problem with the local SSL certificate |
| 2300059 | Couldn't use specified SSL cipher |
| 2300060 | SSL peer certificate or SSH remote key was not OK |
| 2300061 | Unrecognized or bad HTTP Content or Transfer-Encoding |
| 2300063 | Maximum file size exceeded |
| 2300070 | Disk full or allocation exceeded |
| 2300073 | Remote file already exists |
| 2300077 | Problem with the SSL CA cert (path? access rights?) |
| 2300078 | Remote file not found |
| 2300094 | An authentication function returned an error |
| 2300999 | Unknown Other Error |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
**示例:**
```js
import http from '@ohos.net.http';
let httpResponseCache = http.createHttpResponseCache();
```
## HttpResponseCache<sup>9+</sup>
存储HTTP访问请求响应的对象。
### flush<sup>9+</sup>
flush(callback: AsyncCallback\<void>): void
将缓存中的数据写入文件系统,以便在下一个HTTP请求中访问所有缓存数据,使用callback方式作为异步方法。
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | --------------------------------------- | ---- | ---------- |
| callback | AsyncCallback\<void> | 是 | 回调函数返回写入结果。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol |
| 2300008 | Weird server reply |
| 2300009 | Access denied to remote resource |
| 2300016 | Error in the HTTP2 framing layer |
| 2300018 | Transferred a partial file |
| 2300023 | Failed writing received data to disk/application |
| 2300025 | Upload failed |
| 2300026 | Failed to open/read local data from file/application |
| 2300027 | Out of memory |
| 2300028 | Timeout was reached |
| 2300047 | Number of redirects hit maximum amount |
| 2300052 | Server returned nothing (no headers, no data) |
| 2300055 | Failed sending data to the peer |
| 2300056 | Failure when receiving data from the peer |
| 2300058 | Problem with the local SSL certificate |
| 2300059 | Couldn't use specified SSL cipher |
| 2300060 | SSL peer certificate or SSH remote key was not OK |
| 2300061 | Unrecognized or bad HTTP Content or Transfer-Encoding |
| 2300063 | Maximum file size exceeded |
| 2300070 | Disk full or allocation exceeded |
| 2300073 | Remote file already exists |
| 2300077 | Problem with the SSL CA cert (path? access rights?) |
| 2300078 | Remote file not found |
| 2300094 | An authentication function returned an error |
| 2300999 | Unknown Other Error |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
**示例:**
```js
httpResponseCache.flush(err => {
if (err) {
console.log('flush fail');
return;
}
console.log('flush success');
});
```
### flush<sup>9+</sup>
flush(): Promise\<void>
将缓存中的数据写入文件系统,以便在下一个HTTP请求中访问所有缓存数据,使用Promise方式作为异步方法。
**系统能力**:SystemCapability.Communication.NetStack
**返回值:**
| 类型 | 说明 |
| --------------------------------- | ------------------------------------- |
| Promise\<void>> | 以Promise形式返回写入结果。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol |
| 2300008 | Weird server reply |
| 2300009 | Access denied to remote resource |
| 2300016 | Error in the HTTP2 framing layer |
| 2300018 | Transferred a partial file |
| 2300023 | Failed writing received data to disk/application |
| 2300025 | Upload failed |
| 2300026 | Failed to open/read local data from file/application |
| 2300027 | Out of memory |
| 2300028 | Timeout was reached |
| 2300047 | Number of redirects hit maximum amount |
| 2300052 | Server returned nothing (no headers, no data) |
| 2300055 | Failed sending data to the peer |
| 2300056 | Failure when receiving data from the peer |
| 2300058 | Problem with the local SSL certificate |
| 2300059 | Couldn't use specified SSL cipher |
| 2300060 | SSL peer certificate or SSH remote key was not OK |
| 2300061 | Unrecognized or bad HTTP Content or Transfer-Encoding |
| 2300063 | Maximum file size exceeded |
| 2300070 | Disk full or allocation exceeded |
| 2300073 | Remote file already exists |
| 2300077 | Problem with the SSL CA cert (path? access rights?) |
| 2300078 | Remote file not found |
| 2300094 | An authentication function returned an error |
| 2300999 | Unknown Other Error |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
**示例:**
```js
httpResponseCache.flush().then(() => {
console.log('flush success');
}).catch(err => {
console.log('flush fail');
});
```
### delete<sup>9+</sup>
delete(callback: AsyncCallback\<void>): void
禁用缓存并删除其中的数据,使用callback方式作为异步方法。
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | --------------------------------------- | ---- | ---------- |
| callback | AsyncCallback\<void> | 是 | 回调函数返回删除结果。|
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol |
| 2300003 | URL using bad/illegal format or missing URL |
| 2300005 | Couldn't resolve proxy name |
| 2300006 | Couldn't resolve host name |
| 2300007 | Couldn't connect to server |
| 2300008 | Weird server reply |
| 2300009 | Access denied to remote resource |
| 2300999 | Unknown Other Error |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
**示例:**
```js
httpResponseCache.delete(err => {
if (err) {
console.log('delete fail');
return;
}
console.log('delete success');
});
```
### delete<sup>9+</sup>
delete(): Promise\<void>
禁用缓存并删除其中的数据,使用Promise方式作为异步方法。
**系统能力**:SystemCapability.Communication.NetStack
**返回值:**
| 类型 | 说明 |
| --------------------------------- | ------------------------------------- |
| Promise\<void> | 以Promise形式返回删除结果。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300999 | Unknown Other Error |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
**示例:**
```js
httpResponseCache.delete().then(() => {
console.log('delete success');
}).catch(err => {
console.log('delete fail');
});
```
## HttpDataType<sup>9+</sup>
http的数据类型。
**系统能力**:SystemCapability.Communication.NetStack
| 名称 | 值 | 说明 |
| ------------------ | -- | ----------- |
| STRING | 0 | 字符串类型。 |
| OBJECT | 1 | 对象类型。 |
| ARRAY_BUFFER | 2 | 二进制数组类型。|
## HttpProtocol<sup>9+</sup>
http协议版本。
**系统能力**:SystemCapability.Communication.NetStack
| 名称 | 说明 |
| :-------- | :----------- |
| HTTP1_1 | 协议http1.1 |
| HTTP2 | 协议http2 |
# @ohos.net.http (数据请求)
本模块提供HTTP数据请求能力。应用可以通过HTTP发起一个数据请求,支持常见的GET、POST、OPTIONS、HEAD、PUT、DELETE、TRACE、CONNECT方法。
>**说明:**
>
>本模块首批接口从API version 6开始支持。后续版本的新增接口,采用上角标单独标记接口的起始版本。
>
## 导入模块
```js
import http from '@ohos.net.http';
```
## 完整示例
```js
import http from '@ohos.net.http';
// 每一个httpRequest对应一个HTTP请求任务,不可复用
let httpRequest = http.createHttp();
// 用于订阅HTTP响应头,此接口会比request请求先返回。可以根据业务需要订阅此消息
// 从API 8开始,使用on('headersReceive', Callback)替代on('headerReceive', AsyncCallback)。 8+
httpRequest.on('headersReceive', (header) => {
console.info('header: ' + JSON.stringify(header));
});
httpRequest.request(
// 填写HTTP请求的URL地址,可以带参数也可以不带参数。URL地址需要开发者自定义。请求的参数可以在extraData中指定
"EXAMPLE_URL",
{
method: http.RequestMethod.POST, // 可选,默认为http.RequestMethod.GET
// 开发者根据自身业务需要添加header字段
header: {
'Content-Type': 'application/json'
},
// 当使用POST请求时此字段用于传递内容
extraData: {
"data": "data to send",
},
expectDataType: http.HttpDataType.STRING, // 可选,指定返回数据的类型
usingCache: true, // 可选,默认为true
priority: 1, // 可选,默认为1
connectTimeout: 60000, // 可选,默认为60000ms
readTimeout: 60000, // 可选,默认为60000ms
usingProtocol: http.HttpProtocol.HTTP1_1, // 可选,协议类型默认值由系统自动指定
}, (err, data) => {
if (!err) {
// data.result为HTTP响应内容,可根据业务需要进行解析
console.info('Result:' + data.result);
console.info('code:' + data.responseCode);
// data.header为HTTP响应头,可根据业务需要进行解析
console.info('header:' + JSON.stringify(data.header));
console.info('cookies:' + data.cookies); // 8+
} else {
console.info('error:' + JSON.stringify(err));
// 当该请求使用完毕时,调用destroy方法主动销毁。
httpRequest.destroy();
}
}
);
```
## http.createHttp
createHttp\(\): HttpRequest
创建一个HTTP请求,里面包括发起请求、中断请求、订阅/取消订阅HTTP Response Header事件。每一个HttpRequest对象对应一个HTTP请求。如需发起多个HTTP请求,须为每个HTTP请求创建对应HttpRequest对象。
**系统能力**:SystemCapability.Communication.NetStack
**返回值:**
| 类型 | 说明 |
| :---------- | :----------------------------------------------------------- |
| HttpRequest | 返回一个HttpRequest对象,里面包括request、destroy、on和off方法。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 2300999 | Unknown Other Error. |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
**示例:**
```js
import http from '@ohos.net.http';
let httpRequest = http.createHttp();
```
## HttpRequest
HTTP请求任务。在调用HttpRequest的方法前,需要先通过[createHttp\(\)](#httpcreatehttp)创建一个任务。
### request
request\(url: string, callback: AsyncCallback\<HttpResponse\>\):void
根据URL地址,发起HTTP网络请求,使用callback方式作为异步方法。
**需要权限**:ohos.permission.INTERNET
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | ---------------------------------------------- | ---- | ----------------------- |
| url | string | 是 | 发起网络请求的URL地址。 |
| callback | AsyncCallback\<[HttpResponse](#httpresponse)\> | 是 | 回调函数。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol. |
| 2300003 | URL using bad/illegal format or missing URL. |
| 2300005 | Couldn't resolve proxy name. |
| 2300006 | Couldn't resolve host name. |
| 2300007 | Couldn't connect to server. |
| 2300008 | Weird server reply. |
| 2300009 | Access denied to remote resource. |
| 2300016 | Error in the HTTP2 framing layer. |
| 2300018 | Transferred a partial file. |
| 2300023 | Failed writing received data to disk/application. |
| 2300025 | Upload failed. |
| 2300026 | Failed to open/read local data from file/application. |
| 2300027 | Out of memory. |
| 2300028 | Timeout was reached. |
| 2300047 | Number of redirects hit maximum amount. |
| 2300052 | Server returned nothing (no headers, no data). |
| 2300055 | Failed sending data to the peer. |
| 2300056 | Failure when receiving data from the peer. |
| 2300058 | Problem with the local SSL certificate. |
| 2300059 | Couldn't use specified SSL cipher. |
| 2300060 | SSL peer certificate or SSH remote key was not OK. |
| 2300061 | Unrecognized or bad HTTP Content or Transfer-Encoding.|
| 2300063 | Maximum file size exceeded. |
| 2300070 | Disk full or allocation exceeded. |
| 2300073 | Remote file already exists. |
| 2300077 | Problem with the SSL CA cert (path? access rights?). |
| 2300078 | Remote file not found. |
| 2300094 | An authentication function returned an error. |
| 2300999 | Unknown Other Error. |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
**示例:**
```js
httpRequest.request("EXAMPLE_URL", (err, data) => {
if (!err) {
console.info('Result:' + data.result);
console.info('code:' + data.responseCode);
console.info('header:' + JSON.stringify(data.header));
console.info('cookies:' + data.cookies); // 8+
} else {
console.info('error:' + JSON.stringify(err));
}
});
```
### request
request\(url: string, options: HttpRequestOptions, callback: AsyncCallback<HttpResponse\>\):void
根据URL地址和相关配置项,发起HTTP网络请求,使用callback方式作为异步方法。
**需要权限**:ohos.permission.INTERNET
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | ---------------------------------------------- | ---- | ----------------------------------------------- |
| url | string | 是 | 发起网络请求的URL地址。 |
| options | HttpRequestOptions | 是 | 参考[HttpRequestOptions](#httprequestoptions)。 |
| callback | AsyncCallback\<[HttpResponse](#httpresponse)\> | 是 | 回调函数。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol |
| 2300003 | URL using bad/illegal format or missing URL |
| 2300005 | Couldn't resolve proxy name |
| 2300006 | Couldn't resolve host name |
| 2300007 | Couldn't connect to server |
| 2300008 | Weird server reply |
| 2300009 | Access denied to remote resource |
| 2300999 | Unknown Other Error |
>**错误码说明:**
>HTTP 错误码映射关系:2300000 + curl错误码。更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)。
**示例:**
```js
httpRequest.request("EXAMPLE_URL",
{
method: http.RequestMethod.GET,
header: {
'Content-Type': 'application/json'
},
readTimeout: 60000,
connectTimeout: 60000
}, (err, data) => {
if (!err) {
console.info('Result:' + data.result);
console.info('code:' + data.responseCode);
console.info('header:' + JSON.stringify(data.header));
console.info('cookies:' + data.cookies); // 8+
console.info('header.Content-Type:' + data.header['Content-Type']);
console.info('header.Status-Line:' + data.header['Status-Line']);
} else {
console.info('error:' + JSON.stringify(err));
}
});
```
### request
request\(url: string, options? : HttpRequestOptions\): Promise<HttpResponse\>
根据URL地址,发起HTTP网络请求,使用Promise方式作为异步方法。
**需要权限**:ohos.permission.INTERNET
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| ------- | ------------------ | ---- | ----------------------------------------------- |
| url | string | 是 | 发起网络请求的URL地址。 |
| options | HttpRequestOptions | 否 | 参考[HttpRequestOptions](#httprequestoptions)。 |
**返回值:**
| 类型 | 说明 |
| :------------------------------------- | :-------------------------------- |
| Promise<[HttpResponse](#httpresponse)> | 以Promise形式返回发起请求的结果。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol |
| 2300003 | URL using bad/illegal format or missing URL |
| 2300005 | Couldn't resolve proxy name |
| 2300006 | Couldn't resolve host name |
| 2300007 | Couldn't connect to server |
| 2300009 | Access denied to remote resource |
| 2300025 | Upload failed |
| 2300028 | Timeout was reached |
| 2300058 | Problem with the local SSL certificate |
| 2300060 | SSL peer certificate or SSH remote key was not OK |
| 2300061 | Unrecognized or bad HTTP Content or Transfer-Encoding |
| 2300063 | Maximum file size exceeded |
| 2300077 | Problem with the SSL CA cert (path? access rights?) |
| 2300078 | Remote file not found |
| 2300999 | Unknown Other Error |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
**示例:**
```js
let promise = httpRequest.request("EXAMPLE_URL", {
method: http.RequestMethod.GET,
connectTimeout: 60000,
readTimeout: 60000,
header: {
'Content-Type': 'application/json'
}
});
promise.then((data) => {
console.info('Result:' + data.result);
console.info('code:' + data.responseCode);
console.info('header:' + JSON.stringify(data.header));
console.info('cookies:' + data.cookies); // 8+
console.info('header.Content-Type:' + data.header['Content-Type']);
console.info('header.Status-Line:' + data.header['Status-Line']);
}).catch((err) => {
console.info('error:' + JSON.stringify(err));
});
```
### destroy
destroy\(\): void
中断请求任务。
**系统能力**:SystemCapability.Communication.NetStack
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 2300999 | Unknown Other Error |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
**示例:**
```js
httpRequest.destroy();
```
### on\('headerReceive'\)
on\(type: 'headerReceive', callback: AsyncCallback<Object\>\): void
订阅HTTP Response Header 事件。
>![](public_sys-resources/icon-note.gif) **说明:**
>此接口已废弃,建议使用[on\('headersReceive'\)<sup>8+</sup>](#onheadersreceive8)替代。
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | ----------------------- | ---- | --------------------------------- |
| type | string | 是 | 订阅的事件类型,'headerReceive'。 |
| callback | AsyncCallback\<Object\> | 是 | 回调函数。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol |
| 2300003 | URL using bad/illegal format or missing URL |
| 2300005 | Couldn't resolve proxy name |
| 2300006 | Couldn't resolve host name |
| 2300007 | Couldn't connect to server |
| 2300008 | Weird server reply |
| 2300009 | Access denied to remote resource |
| 2300023 | Failed writing received data to disk/application |
| 2300025 | Upload failed |
| 2300027 | Out of memory |
| 2300028 | Timeout was reached |
| 2300052 | Server returned nothing (no headers, no data) |
| 2300056 | Failure when receiving data from the peer |
| 2300058 | Problem with the local SSL certificate |
| 2300060 | SSL peer certificate or SSH remote key was not OK |
| 2300061 | Unrecognized or bad HTTP Content or Transfer-Encoding |
| 2300063 | Maximum file size exceeded |
| 2300070 | Disk full or allocation exceeded |
| 2300077 | Problem with the SSL CA cert (path? access rights?) |
| 2300078 | Remote file not found |
| 2300999 | Unknown Other Error |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
**示例:**
```js
httpRequest.on('headerReceive', (err, data) => {
if (!err) {
console.info('header: ' + JSON.stringify(data));
} else {
console.info('error:' + JSON.stringify(err));
}
});
```
### off\('headerReceive'\)
off\(type: 'headerReceive', callback?: AsyncCallback<Object\>\): void
取消订阅HTTP Response Header 事件。
>![](public_sys-resources/icon-note.gif) **说明:**
>
>1. 此接口已废弃,建议使用[off\('headersReceive'\)<sup>8+</sup>](#offheadersreceive8)替代。
>
>2. 可以指定传入on中的callback取消一个订阅,也可以不指定callback清空所有订阅。
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | ----------------------- | ---- | ------------------------------------- |
| type | string | 是 | 取消订阅的事件类型,'headerReceive'。 |
| callback | AsyncCallback\<Object\> | 否 | 回调函数。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol |
| 2300003 | URL using bad/illegal format or missing URL |
| 2300005 | Couldn't resolve proxy name |
| 2300006 | Couldn't resolve host name |
| 2300007 | Couldn't connect to server |
| 2300008 | Weird server reply |
| 2300009 | Access denied to remote resource |
| 2300999 | Unknown Other Error |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
**示例:**
```js
httpRequest.off('headerReceive');
```
### on\('headersReceive'\)<sup>8+</sup>
on\(type: 'headersReceive', callback: Callback<Object\>\): void
订阅HTTP Response Header 事件。
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | ------------------ | ---- | ---------------------------------- |
| type | string | 是 | 订阅的事件类型:'headersReceive'。 |
| callback | Callback\<Object\> | 是 | 回调函数。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol |
| 2300003 | URL using bad/illegal format or missing URL |
| 2300005 | Couldn't resolve proxy name |
| 2300006 | Couldn't resolve host name |
| 2300007 | Couldn't connect to server |
| 2300008 | Weird server reply |
| 2300009 | Access denied to remote resource |
| 2300023 | Failed writing received data to disk/application |
| 2300025 | Upload failed |
| 2300027 | Out of memory |
| 2300028 | Timeout was reached |
| 2300052 | Server returned nothing (no headers, no data) |
| 2300056 | Failure when receiving data from the peer |
| 2300058 | Problem with the local SSL certificate |
| 2300060 | SSL peer certificate or SSH remote key was not OK |
| 2300061 | Unrecognized or bad HTTP Content or Transfer-Encoding |
| 2300063 | Maximum file size exceeded |
| 2300070 | Disk full or allocation exceeded |
| 2300077 | Problem with the SSL CA cert (path? access rights?) |
| 2300078 | Remote file not found |
| 2300999 | Unknown Other Error |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
**示例:**
```js
httpRequest.on('headersReceive', (header) => {
console.info('header: ' + JSON.stringify(header));
});
```
### off\('headersReceive'\)<sup>8+</sup>
off\(type: 'headersReceive', callback?: Callback<Object\>\): void
取消订阅HTTP Response Header 事件。
>![](public_sys-resources/icon-note.gif) **说明:**
>可以指定传入on中的callback取消一个订阅,也可以不指定callback清空所有订阅。
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | ------------------ | ---- | -------------------------------------- |
| type | string | 是 | 取消订阅的事件类型:'headersReceive'。 |
| callback | Callback\<Object\> | 否 | 回调函数。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol |
| 2300003 | URL using bad/illegal format or missing URL |
| 2300005 | Couldn't resolve proxy name |
| 2300006 | Couldn't resolve host name |
| 2300007 | Couldn't connect to server |
| 2300008 | Weird server reply |
| 2300009 | Access denied to remote resource |
| 2300999 | Unknown Other Error |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
**示例:**
```js
httpRequest.off('headersReceive');
```
### once\('headersReceive'\)<sup>8+</sup>
once\(type: 'headersReceive', callback: Callback<Object\>\): void
订阅HTTP Response Header 事件,但是只触发一次。一旦触发之后,订阅器就会被移除。使用callback方式作为异步方法。
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | ------------------ | ---- | ---------------------------------- |
| type | string | 是 | 订阅的事件类型:'headersReceive'。 |
| callback | Callback\<Object\> | 是 | 回调函数。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol |
| 2300003 | URL using bad/illegal format or missing URL |
| 2300005 | Couldn't resolve proxy name |
| 2300006 | Couldn't resolve host name |
| 2300007 | Couldn't connect to server |
| 2300008 | Weird server reply |
| 2300009 | Access denied to remote resource |
| 2300023 | Failed writing received data to disk/application |
| 2300025 | Upload failed |
| 2300027 | Out of memory |
| 2300028 | Timeout was reached |
| 2300052 | Server returned nothing (no headers, no data) |
| 2300056 | Failure when receiving data from the peer |
| 2300058 | Problem with the local SSL certificate |
| 2300060 | SSL peer certificate or SSH remote key was not OK |
| 2300061 | Unrecognized or bad HTTP Content or Transfer-Encoding |
| 2300063 | Maximum file size exceeded |
| 2300070 | Disk full or allocation exceeded |
| 2300077 | Problem with the SSL CA cert (path? access rights?) |
| 2300078 | Remote file not found |
| 2300999 | Unknown Other Error |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
**示例:**
```js
httpRequest.once('headersReceive', (header) => {
console.info('header: ' + JSON.stringify(header));
});
```
## HttpRequestOptions
发起请求可选参数的类型和取值范围。
**系统能力**:以下各项对应的系统能力均为SystemCapability.Communication.NetStack。
| 名称 | 类型 | 必填 | 说明 |
| -------------- | --------------------------------------------- | ---- | ------------------------------------------------------------ |
| method | [RequestMethod](#requestmethod) | 否 | 请求方式。 |
| extraData | string \| Object \| ArrayBuffer<sup>6+</sup> | 否 | 发送请求的额外数据。<br />- 当HTTP请求为POST、PUT等方法时,此字段为HTTP请求的content。<br />- 当HTTP请求为GET、OPTIONS、DELETE、TRACE、CONNECT等方法时,此字段为HTTP请求的参数补充,参数内容会拼接到URL中进行发送。<sup>6+</sup><br />- 开发者传入string对象,开发者需要自行编码,将编码后的string传入。<sup>6+</sup> |
| expectDataType<sup>9+</sup> | [HttpDataType](#httpdatatype9) | 否 | 指定返回数据的类型。如果设置了此参数,系统将优先返回指定的类型。 |
| usingCache<sup>9+</sup> | boolean | 否 | 是否使用缓存,默认为true。 |
| priority<sup>9+</sup> | number | 否 | 优先级,范围\[1,1000],默认是1。 |
| header | Object | 否 | HTTP请求头字段。默认{'Content-Type': 'application/json'}。 |
| readTimeout | number | 否 | 读取超时时间。单位为毫秒(ms),默认为60000ms。 |
| connectTimeout | number | 否 | 连接超时时间。单位为毫秒(ms),默认为60000ms。 |
| usingProtocol<sup>9+</sup> | [HttpProtocol](#httpprotocol9) | 否 | 使用协议。默认值由系统自动指定。 |
## RequestMethod
HTTP 请求方法。
**系统能力**:以下各项对应的系统能力均为SystemCapability.Communication.NetStack。
| 名称 | 值 | 说明 |
| :------ | ------- | :------------------ |
| OPTIONS | "OPTIONS" | HTTP 请求 OPTIONS。 |
| GET | "GET" | HTTP 请求 GET。 |
| HEAD | "HEAD" | HTTP 请求 HEAD。 |
| POST | "POST" | HTTP 请求 POST。 |
| PUT | "PUT" | HTTP 请求 PUT。 |
| DELETE | "DELETE" | HTTP 请求 DELETE。 |
| TRACE | "TRACE" | HTTP 请求 TRACE。 |
| CONNECT | "CONNECT" | HTTP 请求 CONNECT。 |
## ResponseCode
发起请求返回的响应码。
**系统能力**:以下各项对应的系统能力均为SystemCapability.Communication.NetStack。
| 名称 | 值 | 说明 |
| ----------------- | ---- | ------------------------------------------------------------ |
| OK | 200 | 请求成功。一般用于GET与POST请求。 |
| CREATED | 201 | 已创建。成功请求并创建了新的资源。 |
| ACCEPTED | 202 | 已接受。已经接受请求,但未处理完成。 |
| NOT_AUTHORITATIVE | 203 | 非授权信息。请求成功。 |
| NO_CONTENT | 204 | 无内容。服务器成功处理,但未返回内容。 |
| RESET | 205 | 重置内容。 |
| PARTIAL | 206 | 部分内容。服务器成功处理了部分GET请求。 |
| MULT_CHOICE | 300 | 多种选择。 |
| MOVED_PERM | 301 | 永久移动。请求的资源已被永久的移动到新URI,返回信息会包括新的URI,浏览器会自动定向到新URI。 |
| MOVED_TEMP | 302 | 临时移动。 |
| SEE_OTHER | 303 | 查看其它地址。 |
| NOT_MODIFIED | 304 | 未修改。 |
| USE_PROXY | 305 | 使用代理。 |
| BAD_REQUEST | 400 | 客户端请求的语法错误,服务器无法理解。 |
| UNAUTHORIZED | 401 | 请求要求用户的身份认证。 |
| PAYMENT_REQUIRED | 402 | 保留,将来使用。 |
| FORBIDDEN | 403 | 服务器理解请求客户端的请求,但是拒绝执行此请求。 |
| NOT_FOUND | 404 | 服务器无法根据客户端的请求找到资源(网页)。 |
| BAD_METHOD | 405 | 客户端请求中的方法被禁止。 |
| NOT_ACCEPTABLE | 406 | 服务器无法根据客户端请求的内容特性完成请求。 |
| PROXY_AUTH | 407 | 请求要求代理的身份认证。 |
| CLIENT_TIMEOUT | 408 | 请求时间过长,超时。 |
| CONFLICT | 409 | 服务器完成客户端的PUT请求是可能返回此代码,服务器处理请求时发生了冲突。 |
| GONE | 410 | 客户端请求的资源已经不存在。 |
| LENGTH_REQUIRED | 411 | 服务器无法处理客户端发送的不带Content-Length的请求信息。 |
| PRECON_FAILED | 412 | 客户端请求信息的先决条件错误。 |
| ENTITY_TOO_LARGE | 413 | 由于请求的实体过大,服务器无法处理,因此拒绝请求。 |
| REQ_TOO_LONG | 414 | 请求的URI过长(URI通常为网址),服务器无法处理。 |
| UNSUPPORTED_TYPE | 415 | 服务器无法处理请求的格式。 |
| INTERNAL_ERROR | 500 | 服务器内部错误,无法完成请求。 |
| NOT_IMPLEMENTED | 501 | 服务器不支持请求的功能,无法完成请求。 |
| BAD_GATEWAY | 502 | 充当网关或代理的服务器,从远端服务器接收到了一个无效的请求。 |
| UNAVAILABLE | 503 | 由于超载或系统维护,服务器暂时的无法处理客户端的请求。 |
| GATEWAY_TIMEOUT | 504 | 充当网关或代理的服务器,未及时从远端服务器获取请求。 |
| VERSION | 505 | 服务器请求的HTTP协议的版本。 |
## HttpResponse
request方法回调函数的返回值类型。
**系统能力**:以下各项对应的系统能力均为SystemCapability.Communication.NetStack。
| 名称 | 类型 | 必填 | 说明 |
| -------------------- | -------------------------------------------- | ---- | ------------------------------------------------------------ |
| result | string \| Object \| ArrayBuffer<sup>6+</sup> | 是 | HTTP请求根据响应头中Content-type类型返回对应的响应格式内容:<br />- application/json:返回JSON格式的字符串,如需HTTP响应具体内容,需开发者自行解析<br />- application/octet-stream:ArrayBuffer<br />- 其他:string |
| resultType<sup>9+</sup> | [HttpDataType](#httpdatatype9) | 是 | 返回值类型。 |
| responseCode | [ResponseCode](#responsecode) \| number | 是 | 回调函数执行成功时,此字段为[ResponseCode](#responsecode)。若执行失败,错误码将会从AsyncCallback中的err字段返回。 |
| header | Object | 是 | 发起HTTP请求返回来的响应头。当前返回的是JSON格式字符串,如需具体字段内容,需开发者自行解析。常见字段及解析方式如下:<br/>- Content-Type:header['Content-Type'];<br />- Status-Line:header['Status-Line'];<br />- Date:header.Date/header['Date'];<br />- Server:header.Server/header['Server']; |
| cookies<sup>8+</sup> | Array\<string\> | 是 | 服务器返回的 cookies。 |
## http.createHttpResponseCache<sup>9+</sup>
createHttpResponseCache(cacheSize?: number): HttpResponseCache
创建一个默认的对象来存储HTTP访问请求的响应。
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | --------------------------------------- | ---- | ---------- |
| cacheSize | number | 否 | 缓存大小最大为10\*1024\*1024(10MB),默认最大。 |
**返回值:**
| 类型 | 说明 |
| :---------- | :----------------------------------------------------------- |
| [HttpResponseCache](#httpresponsecache9) | 返回一个存储HTTP访问请求响应的对象。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300008 | Weird server reply |
| 2300009 | Access denied to remote resource |
| 2300016 | Error in the HTTP2 framing layer |
| 2300018 | Transferred a partial file |
| 2300023 | Failed writing received data to disk/application |
| 2300025 | Upload failed |
| 2300026 | Failed to open/read local data from file/application |
| 2300027 | Out of memory |
| 2300028 | Timeout was reached |
| 2300047 | Number of redirects hit maximum amount |
| 2300052 | Server returned nothing (no headers, no data) |
| 2300055 | Failed sending data to the peer |
| 2300056 | Failure when receiving data from the peer |
| 2300058 | Problem with the local SSL certificate |
| 2300059 | Couldn't use specified SSL cipher |
| 2300060 | SSL peer certificate or SSH remote key was not OK |
| 2300061 | Unrecognized or bad HTTP Content or Transfer-Encoding |
| 2300063 | Maximum file size exceeded |
| 2300070 | Disk full or allocation exceeded |
| 2300073 | Remote file already exists |
| 2300077 | Problem with the SSL CA cert (path? access rights?) |
| 2300078 | Remote file not found |
| 2300094 | An authentication function returned an error |
| 2300999 | Unknown Other Error |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
**示例:**
```js
import http from '@ohos.net.http';
let httpResponseCache = http.createHttpResponseCache();
```
## HttpResponseCache<sup>9+</sup>
存储HTTP访问请求响应的对象。
### flush<sup>9+</sup>
flush(callback: AsyncCallback\<void>): void
将缓存中的数据写入文件系统,以便在下一个HTTP请求中访问所有缓存数据,使用callback方式作为异步方法。
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | --------------------------------------- | ---- | ---------- |
| callback | AsyncCallback\<void> | 是 | 回调函数返回写入结果。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol |
| 2300008 | Weird server reply |
| 2300009 | Access denied to remote resource |
| 2300016 | Error in the HTTP2 framing layer |
| 2300018 | Transferred a partial file |
| 2300023 | Failed writing received data to disk/application |
| 2300025 | Upload failed |
| 2300026 | Failed to open/read local data from file/application |
| 2300027 | Out of memory |
| 2300028 | Timeout was reached |
| 2300047 | Number of redirects hit maximum amount |
| 2300052 | Server returned nothing (no headers, no data) |
| 2300055 | Failed sending data to the peer |
| 2300056 | Failure when receiving data from the peer |
| 2300058 | Problem with the local SSL certificate |
| 2300059 | Couldn't use specified SSL cipher |
| 2300060 | SSL peer certificate or SSH remote key was not OK |
| 2300061 | Unrecognized or bad HTTP Content or Transfer-Encoding |
| 2300063 | Maximum file size exceeded |
| 2300070 | Disk full or allocation exceeded |
| 2300073 | Remote file already exists |
| 2300077 | Problem with the SSL CA cert (path? access rights?) |
| 2300078 | Remote file not found |
| 2300094 | An authentication function returned an error |
| 2300999 | Unknown Other Error |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
**示例:**
```js
httpResponseCache.flush(err => {
if (err) {
console.log('flush fail');
return;
}
console.log('flush success');
});
```
### flush<sup>9+</sup>
flush(): Promise\<void>
将缓存中的数据写入文件系统,以便在下一个HTTP请求中访问所有缓存数据,使用Promise方式作为异步方法。
**系统能力**:SystemCapability.Communication.NetStack
**返回值:**
| 类型 | 说明 |
| --------------------------------- | ------------------------------------- |
| Promise\<void>> | 以Promise形式返回写入结果。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol |
| 2300008 | Weird server reply |
| 2300009 | Access denied to remote resource |
| 2300016 | Error in the HTTP2 framing layer |
| 2300018 | Transferred a partial file |
| 2300023 | Failed writing received data to disk/application |
| 2300025 | Upload failed |
| 2300026 | Failed to open/read local data from file/application |
| 2300027 | Out of memory |
| 2300028 | Timeout was reached |
| 2300047 | Number of redirects hit maximum amount |
| 2300052 | Server returned nothing (no headers, no data) |
| 2300055 | Failed sending data to the peer |
| 2300056 | Failure when receiving data from the peer |
| 2300058 | Problem with the local SSL certificate |
| 2300059 | Couldn't use specified SSL cipher |
| 2300060 | SSL peer certificate or SSH remote key was not OK |
| 2300061 | Unrecognized or bad HTTP Content or Transfer-Encoding |
| 2300063 | Maximum file size exceeded |
| 2300070 | Disk full or allocation exceeded |
| 2300073 | Remote file already exists |
| 2300077 | Problem with the SSL CA cert (path? access rights?) |
| 2300078 | Remote file not found |
| 2300094 | An authentication function returned an error |
| 2300999 | Unknown Other Error |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
**示例:**
```js
httpResponseCache.flush().then(() => {
console.log('flush success');
}).catch(err => {
console.log('flush fail');
});
```
### delete<sup>9+</sup>
delete(callback: AsyncCallback\<void>): void
禁用缓存并删除其中的数据,使用callback方式作为异步方法。
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | --------------------------------------- | ---- | ---------- |
| callback | AsyncCallback\<void> | 是 | 回调函数返回删除结果。|
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol |
| 2300003 | URL using bad/illegal format or missing URL |
| 2300005 | Couldn't resolve proxy name |
| 2300006 | Couldn't resolve host name |
| 2300007 | Couldn't connect to server |
| 2300008 | Weird server reply |
| 2300009 | Access denied to remote resource |
| 2300999 | Unknown Other Error |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
**示例:**
```js
httpResponseCache.delete(err => {
if (err) {
console.log('delete fail');
return;
}
console.log('delete success');
});
```
### delete<sup>9+</sup>
delete(): Promise\<void>
禁用缓存并删除其中的数据,使用Promise方式作为异步方法。
**系统能力**:SystemCapability.Communication.NetStack
**返回值:**
| 类型 | 说明 |
| --------------------------------- | ------------------------------------- |
| Promise\<void> | 以Promise形式返回删除结果。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300999 | Unknown Other Error |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
**示例:**
```js
httpResponseCache.delete().then(() => {
console.log('delete success');
}).catch(err => {
console.log('delete fail');
});
```
## HttpDataType<sup>9+</sup>
http的数据类型。
**系统能力**:SystemCapability.Communication.NetStack
| 名称 | 值 | 说明 |
| ------------------ | -- | ----------- |
| STRING | 0 | 字符串类型。 |
| OBJECT | 1 | 对象类型。 |
| ARRAY_BUFFER | 2 | 二进制数组类型。|
## HttpProtocol<sup>9+</sup>
http协议版本。
**系统能力**:SystemCapability.Communication.NetStack
| 名称 | 说明 |
| :-------- | :----------- |
| HTTP1_1 | 协议http1.1 |
| HTTP2 | 协议http2 |
# @ohos.net.http (数据请求)
本模块提供HTTP数据请求能力。应用可以通过HTTP发起一个数据请求,支持常见的GET、POST、OPTIONS、HEAD、PUT、DELETE、TRACE、CONNECT方法。
>**说明:**
>
>本模块首批接口从API version 6开始支持。后续版本的新增接口,采用上角标单独标记接口的起始版本。
>
## 导入模块
```js
import http from '@ohos.net.http';
```
## 完整示例
```js
import http from '@ohos.net.http';
// 每一个httpRequest对应一个HTTP请求任务,不可复用
let httpRequest = http.createHttp();
// 用于订阅HTTP响应头,此接口会比request请求先返回。可以根据业务需要订阅此消息
// 从API 8开始,使用on('headersReceive', Callback)替代on('headerReceive', AsyncCallback)。 8+
httpRequest.on('headersReceive', (header) => {
console.info('header: ' + JSON.stringify(header));
});
httpRequest.request(
// 填写HTTP请求的URL地址,可以带参数也可以不带参数。URL地址需要开发者自定义。请求的参数可以在extraData中指定
"EXAMPLE_URL",
{
method: http.RequestMethod.POST, // 可选,默认为http.RequestMethod.GET
// 开发者根据自身业务需要添加header字段
header: {
'Content-Type': 'application/json'
},
// 当使用POST请求时此字段用于传递内容
extraData: {
"data": "data to send",
},
expectDataType: http.HttpDataType.STRING, // 可选,指定返回数据的类型
usingCache: true, // 可选,默认为true
priority: 1, // 可选,默认为1
connectTimeout: 60000, // 可选,默认为60000ms
readTimeout: 60000, // 可选,默认为60000ms
usingProtocol: http.HttpProtocol.HTTP1_1, // 可选,协议类型默认值由系统自动指定
}, (err, data) => {
if (!err) {
// data.result为HTTP响应内容,可根据业务需要进行解析
console.info('Result:' + data.result);
console.info('code:' + data.responseCode);
// data.header为HTTP响应头,可根据业务需要进行解析
console.info('header:' + JSON.stringify(data.header));
console.info('cookies:' + data.cookies); // 8+
} else {
console.info('error:' + JSON.stringify(err));
// 当该请求使用完毕时,调用destroy方法主动销毁。
httpRequest.destroy();
}
}
);
```
## http.createHttp
createHttp\(\): HttpRequest
创建一个HTTP请求,里面包括发起请求、中断请求、订阅/取消订阅HTTP Response Header事件。每一个HttpRequest对象对应一个HTTP请求。如需发起多个HTTP请求,须为每个HTTP请求创建对应HttpRequest对象。
**系统能力**:SystemCapability.Communication.NetStack
**返回值:**
| 类型 | 说明 |
| :---------- | :----------------------------------------------------------- |
| HttpRequest | 返回一个HttpRequest对象,里面包括request、destroy、on和off方法。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 2300999 | Unknown Other Error. |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
**示例:**
```js
import http from '@ohos.net.http';
let httpRequest = http.createHttp();
```
## HttpRequest
HTTP请求任务。在调用HttpRequest的方法前,需要先通过[createHttp\(\)](#httpcreatehttp)创建一个任务。
### request
request\(url: string, callback: AsyncCallback\<HttpResponse\>\):void
根据URL地址,发起HTTP网络请求,使用callback方式作为异步方法。
**需要权限**:ohos.permission.INTERNET
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | ---------------------------------------------- | ---- | ----------------------- |
| url | string | 是 | 发起网络请求的URL地址。 |
| callback | AsyncCallback\<[HttpResponse](#httpresponse)\> | 是 | 回调函数。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol. |
| 2300003 | URL using bad/illegal format or missing URL. |
| 2300005 | Couldn't resolve proxy name. |
| 2300006 | Couldn't resolve host name. |
| 2300007 | Couldn't connect to server. |
| 2300008 | Weird server reply. |
| 2300009 | Access denied to remote resource. |
| 2300016 | Error in the HTTP2 framing layer. |
| 2300018 | Transferred a partial file. |
| 2300023 | Failed writing received data to disk/application. |
| 2300025 | Upload failed. |
| 2300026 | Failed to open/read local data from file/application. |
| 2300027 | Out of memory. |
| 2300028 | Timeout was reached. |
| 2300047 | Number of redirects hit maximum amount. |
| 2300052 | Server returned nothing (no headers, no data). |
| 2300055 | Failed sending data to the peer. |
| 2300056 | Failure when receiving data from the peer. |
| 2300058 | Problem with the local SSL certificate. |
| 2300059 | Couldn't use specified SSL cipher. |
| 2300060 | SSL peer certificate or SSH remote key was not OK. |
| 2300061 | Unrecognized or bad HTTP Content or Transfer-Encoding.|
| 2300063 | Maximum file size exceeded. |
| 2300070 | Disk full or allocation exceeded. |
| 2300073 | Remote file already exists. |
| 2300077 | Problem with the SSL CA cert (path? access rights?). |
| 2300078 | Remote file not found. |
| 2300094 | An authentication function returned an error. |
| 2300999 | Unknown Other Error. |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
**示例:**
```js
httpRequest.request("EXAMPLE_URL", (err, data) => {
if (!err) {
console.info('Result:' + data.result);
console.info('code:' + data.responseCode);
console.info('header:' + JSON.stringify(data.header));
console.info('cookies:' + data.cookies); // 8+
} else {
console.info('error:' + JSON.stringify(err));
}
});
```
### request
request\(url: string, options: HttpRequestOptions, callback: AsyncCallback<HttpResponse\>\):void
根据URL地址和相关配置项,发起HTTP网络请求,使用callback方式作为异步方法。
**需要权限**:ohos.permission.INTERNET
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | ---------------------------------------------- | ---- | ----------------------------------------------- |
| url | string | 是 | 发起网络请求的URL地址。 |
| options | HttpRequestOptions | 是 | 参考[HttpRequestOptions](#httprequestoptions)。 |
| callback | AsyncCallback\<[HttpResponse](#httpresponse)\> | 是 | 回调函数。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol |
| 2300003 | URL using bad/illegal format or missing URL |
| 2300005 | Couldn't resolve proxy name |
| 2300006 | Couldn't resolve host name |
| 2300007 | Couldn't connect to server |
| 2300008 | Weird server reply |
| 2300009 | Access denied to remote resource |
| 2300999 | Unknown Other Error |
>**错误码说明:**
>HTTP 错误码映射关系:2300000 + curl错误码。更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)。
**示例:**
```js
httpRequest.request("EXAMPLE_URL",
{
method: http.RequestMethod.GET,
header: {
'Content-Type': 'application/json'
},
readTimeout: 60000,
connectTimeout: 60000
}, (err, data) => {
if (!err) {
console.info('Result:' + data.result);
console.info('code:' + data.responseCode);
console.info('header:' + JSON.stringify(data.header));
console.info('cookies:' + data.cookies); // 8+
console.info('header.Content-Type:' + data.header['Content-Type']);
console.info('header.Status-Line:' + data.header['Status-Line']);
} else {
console.info('error:' + JSON.stringify(err));
}
});
```
### request
request\(url: string, options? : HttpRequestOptions\): Promise<HttpResponse\>
根据URL地址,发起HTTP网络请求,使用Promise方式作为异步方法。
**需要权限**:ohos.permission.INTERNET
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| ------- | ------------------ | ---- | ----------------------------------------------- |
| url | string | 是 | 发起网络请求的URL地址。 |
| options | HttpRequestOptions | 否 | 参考[HttpRequestOptions](#httprequestoptions)。 |
**返回值:**
| 类型 | 说明 |
| :------------------------------------- | :-------------------------------- |
| Promise<[HttpResponse](#httpresponse)> | 以Promise形式返回发起请求的结果。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol |
| 2300003 | URL using bad/illegal format or missing URL |
| 2300005 | Couldn't resolve proxy name |
| 2300006 | Couldn't resolve host name |
| 2300007 | Couldn't connect to server |
| 2300009 | Access denied to remote resource |
| 2300025 | Upload failed |
| 2300028 | Timeout was reached |
| 2300058 | Problem with the local SSL certificate |
| 2300060 | SSL peer certificate or SSH remote key was not OK |
| 2300061 | Unrecognized or bad HTTP Content or Transfer-Encoding |
| 2300063 | Maximum file size exceeded |
| 2300077 | Problem with the SSL CA cert (path? access rights?) |
| 2300078 | Remote file not found |
| 2300999 | Unknown Other Error |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
**示例:**
```js
let promise = httpRequest.request("EXAMPLE_URL", {
method: http.RequestMethod.GET,
connectTimeout: 60000,
readTimeout: 60000,
header: {
'Content-Type': 'application/json'
}
});
promise.then((data) => {
console.info('Result:' + data.result);
console.info('code:' + data.responseCode);
console.info('header:' + JSON.stringify(data.header));
console.info('cookies:' + data.cookies); // 8+
console.info('header.Content-Type:' + data.header['Content-Type']);
console.info('header.Status-Line:' + data.header['Status-Line']);
}).catch((err) => {
console.info('error:' + JSON.stringify(err));
});
```
### destroy
destroy\(\): void
中断请求任务。
**系统能力**:SystemCapability.Communication.NetStack
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 2300999 | Unknown Other Error |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
**示例:**
```js
httpRequest.destroy();
```
### on\('headerReceive'\)
on\(type: 'headerReceive', callback: AsyncCallback<Object\>\): void
订阅HTTP Response Header 事件。
>![](public_sys-resources/icon-note.gif) **说明:**
>此接口已废弃,建议使用[on\('headersReceive'\)<sup>8+</sup>](#onheadersreceive8)替代。
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | ----------------------- | ---- | --------------------------------- |
| type | string | 是 | 订阅的事件类型,'headerReceive'。 |
| callback | AsyncCallback\<Object\> | 是 | 回调函数。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol |
| 2300003 | URL using bad/illegal format or missing URL |
| 2300005 | Couldn't resolve proxy name |
| 2300006 | Couldn't resolve host name |
| 2300007 | Couldn't connect to server |
| 2300008 | Weird server reply |
| 2300009 | Access denied to remote resource |
| 2300023 | Failed writing received data to disk/application |
| 2300025 | Upload failed |
| 2300027 | Out of memory |
| 2300028 | Timeout was reached |
| 2300052 | Server returned nothing (no headers, no data) |
| 2300056 | Failure when receiving data from the peer |
| 2300058 | Problem with the local SSL certificate |
| 2300060 | SSL peer certificate or SSH remote key was not OK |
| 2300061 | Unrecognized or bad HTTP Content or Transfer-Encoding |
| 2300063 | Maximum file size exceeded |
| 2300070 | Disk full or allocation exceeded |
| 2300077 | Problem with the SSL CA cert (path? access rights?) |
| 2300078 | Remote file not found |
| 2300999 | Unknown Other Error |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
**示例:**
```js
httpRequest.on('headerReceive', (err, data) => {
if (!err) {
console.info('header: ' + JSON.stringify(data));
} else {
console.info('error:' + JSON.stringify(err));
}
});
```
### off\('headerReceive'\)
off\(type: 'headerReceive', callback?: AsyncCallback<Object\>\): void
取消订阅HTTP Response Header 事件。
>![](public_sys-resources/icon-note.gif) **说明:**
>
>1. 此接口已废弃,建议使用[off\('headersReceive'\)<sup>8+</sup>](#offheadersreceive8)替代。
>
>2. 可以指定传入on中的callback取消一个订阅,也可以不指定callback清空所有订阅。
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | ----------------------- | ---- | ------------------------------------- |
| type | string | 是 | 取消订阅的事件类型,'headerReceive'。 |
| callback | AsyncCallback\<Object\> | 否 | 回调函数。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol |
| 2300003 | URL using bad/illegal format or missing URL |
| 2300005 | Couldn't resolve proxy name |
| 2300006 | Couldn't resolve host name |
| 2300007 | Couldn't connect to server |
| 2300008 | Weird server reply |
| 2300009 | Access denied to remote resource |
| 2300999 | Unknown Other Error |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
**示例:**
```js
httpRequest.off('headerReceive');
```
### on\('headersReceive'\)<sup>8+</sup>
on\(type: 'headersReceive', callback: Callback<Object\>\): void
订阅HTTP Response Header 事件。
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | ------------------ | ---- | ---------------------------------- |
| type | string | 是 | 订阅的事件类型:'headersReceive'。 |
| callback | Callback\<Object\> | 是 | 回调函数。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol |
| 2300003 | URL using bad/illegal format or missing URL |
| 2300005 | Couldn't resolve proxy name |
| 2300006 | Couldn't resolve host name |
| 2300007 | Couldn't connect to server |
| 2300008 | Weird server reply |
| 2300009 | Access denied to remote resource |
| 2300023 | Failed writing received data to disk/application |
| 2300025 | Upload failed |
| 2300027 | Out of memory |
| 2300028 | Timeout was reached |
| 2300052 | Server returned nothing (no headers, no data) |
| 2300056 | Failure when receiving data from the peer |
| 2300058 | Problem with the local SSL certificate |
| 2300060 | SSL peer certificate or SSH remote key was not OK |
| 2300061 | Unrecognized or bad HTTP Content or Transfer-Encoding |
| 2300063 | Maximum file size exceeded |
| 2300070 | Disk full or allocation exceeded |
| 2300077 | Problem with the SSL CA cert (path? access rights?) |
| 2300078 | Remote file not found |
| 2300999 | Unknown Other Error |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
**示例:**
```js
httpRequest.on('headersReceive', (header) => {
console.info('header: ' + JSON.stringify(header));
});
```
### off\('headersReceive'\)<sup>8+</sup>
off\(type: 'headersReceive', callback?: Callback<Object\>\): void
取消订阅HTTP Response Header 事件。
>![](public_sys-resources/icon-note.gif) **说明:**
>可以指定传入on中的callback取消一个订阅,也可以不指定callback清空所有订阅。
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | ------------------ | ---- | -------------------------------------- |
| type | string | 是 | 取消订阅的事件类型:'headersReceive'。 |
| callback | Callback\<Object\> | 否 | 回调函数。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol |
| 2300003 | URL using bad/illegal format or missing URL |
| 2300005 | Couldn't resolve proxy name |
| 2300006 | Couldn't resolve host name |
| 2300007 | Couldn't connect to server |
| 2300008 | Weird server reply |
| 2300009 | Access denied to remote resource |
| 2300999 | Unknown Other Error |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
**示例:**
```js
httpRequest.off('headersReceive');
```
### once\('headersReceive'\)<sup>8+</sup>
once\(type: 'headersReceive', callback: Callback<Object\>\): void
订阅HTTP Response Header 事件,但是只触发一次。一旦触发之后,订阅器就会被移除。使用callback方式作为异步方法。
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | ------------------ | ---- | ---------------------------------- |
| type | string | 是 | 订阅的事件类型:'headersReceive'。 |
| callback | Callback\<Object\> | 是 | 回调函数。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol |
| 2300003 | URL using bad/illegal format or missing URL |
| 2300005 | Couldn't resolve proxy name |
| 2300006 | Couldn't resolve host name |
| 2300007 | Couldn't connect to server |
| 2300008 | Weird server reply |
| 2300009 | Access denied to remote resource |
| 2300023 | Failed writing received data to disk/application |
| 2300025 | Upload failed |
| 2300027 | Out of memory |
| 2300028 | Timeout was reached |
| 2300052 | Server returned nothing (no headers, no data) |
| 2300056 | Failure when receiving data from the peer |
| 2300058 | Problem with the local SSL certificate |
| 2300060 | SSL peer certificate or SSH remote key was not OK |
| 2300061 | Unrecognized or bad HTTP Content or Transfer-Encoding |
| 2300063 | Maximum file size exceeded |
| 2300070 | Disk full or allocation exceeded |
| 2300077 | Problem with the SSL CA cert (path? access rights?) |
| 2300078 | Remote file not found |
| 2300999 | Unknown Other Error |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
**示例:**
```js
httpRequest.once('headersReceive', (header) => {
console.info('header: ' + JSON.stringify(header));
});
```
## HttpRequestOptions
发起请求可选参数的类型和取值范围。
**系统能力**:以下各项对应的系统能力均为SystemCapability.Communication.NetStack。
| 名称 | 类型 | 必填 | 说明 |
| -------------- | --------------------------------------------- | ---- | ------------------------------------------------------------ |
| method | [RequestMethod](#requestmethod) | 否 | 请求方式。 |
| extraData | string \| Object \| ArrayBuffer<sup>6+</sup> | 否 | 发送请求的额外数据。<br />- 当HTTP请求为POST、PUT等方法时,此字段为HTTP请求的content。<br />- 当HTTP请求为GET、OPTIONS、DELETE、TRACE、CONNECT等方法时,此字段为HTTP请求的参数补充,参数内容会拼接到URL中进行发送。<sup>6+</sup><br />- 开发者传入string对象,开发者需要自行编码,将编码后的string传入。<sup>6+</sup> |
| expectDataType<sup>9+</sup> | [HttpDataType](#httpdatatype9) | 否 | 指定返回数据的类型。如果设置了此参数,系统将优先返回指定的类型。 |
| usingCache<sup>9+</sup> | boolean | 否 | 是否使用缓存,默认为true。 |
| priority<sup>9+</sup> | number | 否 | 优先级,范围\[1,1000],默认是1。 |
| header | Object | 否 | HTTP请求头字段。默认{'Content-Type': 'application/json'}。 |
| readTimeout | number | 否 | 读取超时时间。单位为毫秒(ms),默认为60000ms。 |
| connectTimeout | number | 否 | 连接超时时间。单位为毫秒(ms),默认为60000ms。 |
| usingProtocol<sup>9+</sup> | [HttpProtocol](#httpprotocol9) | 否 | 使用协议。默认值由系统自动指定。 |
## RequestMethod
HTTP 请求方法。
**系统能力**:以下各项对应的系统能力均为SystemCapability.Communication.NetStack。
| 名称 | 值 | 说明 |
| :------ | ------- | :------------------ |
| OPTIONS | "OPTIONS" | HTTP 请求 OPTIONS。 |
| GET | "GET" | HTTP 请求 GET。 |
| HEAD | "HEAD" | HTTP 请求 HEAD。 |
| POST | "POST" | HTTP 请求 POST。 |
| PUT | "PUT" | HTTP 请求 PUT。 |
| DELETE | "DELETE" | HTTP 请求 DELETE。 |
| TRACE | "TRACE" | HTTP 请求 TRACE。 |
| CONNECT | "CONNECT" | HTTP 请求 CONNECT。 |
## ResponseCode
发起请求返回的响应码。
**系统能力**:以下各项对应的系统能力均为SystemCapability.Communication.NetStack。
| 名称 | 值 | 说明 |
| ----------------- | ---- | ------------------------------------------------------------ |
| OK | 200 | 请求成功。一般用于GET与POST请求。 |
| CREATED | 201 | 已创建。成功请求并创建了新的资源。 |
| ACCEPTED | 202 | 已接受。已经接受请求,但未处理完成。 |
| NOT_AUTHORITATIVE | 203 | 非授权信息。请求成功。 |
| NO_CONTENT | 204 | 无内容。服务器成功处理,但未返回内容。 |
| RESET | 205 | 重置内容。 |
| PARTIAL | 206 | 部分内容。服务器成功处理了部分GET请求。 |
| MULT_CHOICE | 300 | 多种选择。 |
| MOVED_PERM | 301 | 永久移动。请求的资源已被永久的移动到新URI,返回信息会包括新的URI,浏览器会自动定向到新URI。 |
| MOVED_TEMP | 302 | 临时移动。 |
| SEE_OTHER | 303 | 查看其它地址。 |
| NOT_MODIFIED | 304 | 未修改。 |
| USE_PROXY | 305 | 使用代理。 |
| BAD_REQUEST | 400 | 客户端请求的语法错误,服务器无法理解。 |
| UNAUTHORIZED | 401 | 请求要求用户的身份认证。 |
| PAYMENT_REQUIRED | 402 | 保留,将来使用。 |
| FORBIDDEN | 403 | 服务器理解请求客户端的请求,但是拒绝执行此请求。 |
| NOT_FOUND | 404 | 服务器无法根据客户端的请求找到资源(网页)。 |
| BAD_METHOD | 405 | 客户端请求中的方法被禁止。 |
| NOT_ACCEPTABLE | 406 | 服务器无法根据客户端请求的内容特性完成请求。 |
| PROXY_AUTH | 407 | 请求要求代理的身份认证。 |
| CLIENT_TIMEOUT | 408 | 请求时间过长,超时。 |
| CONFLICT | 409 | 服务器完成客户端的PUT请求是可能返回此代码,服务器处理请求时发生了冲突。 |
| GONE | 410 | 客户端请求的资源已经不存在。 |
| LENGTH_REQUIRED | 411 | 服务器无法处理客户端发送的不带Content-Length的请求信息。 |
| PRECON_FAILED | 412 | 客户端请求信息的先决条件错误。 |
| ENTITY_TOO_LARGE | 413 | 由于请求的实体过大,服务器无法处理,因此拒绝请求。 |
| REQ_TOO_LONG | 414 | 请求的URI过长(URI通常为网址),服务器无法处理。 |
| UNSUPPORTED_TYPE | 415 | 服务器无法处理请求的格式。 |
| INTERNAL_ERROR | 500 | 服务器内部错误,无法完成请求。 |
| NOT_IMPLEMENTED | 501 | 服务器不支持请求的功能,无法完成请求。 |
| BAD_GATEWAY | 502 | 充当网关或代理的服务器,从远端服务器接收到了一个无效的请求。 |
| UNAVAILABLE | 503 | 由于超载或系统维护,服务器暂时的无法处理客户端的请求。 |
| GATEWAY_TIMEOUT | 504 | 充当网关或代理的服务器,未及时从远端服务器获取请求。 |
| VERSION | 505 | 服务器请求的HTTP协议的版本。 |
## HttpResponse
request方法回调函数的返回值类型。
**系统能力**:以下各项对应的系统能力均为SystemCapability.Communication.NetStack。
| 名称 | 类型 | 必填 | 说明 |
| -------------------- | -------------------------------------------- | ---- | ------------------------------------------------------------ |
| result | string \| Object \| ArrayBuffer<sup>6+</sup> | 是 | HTTP请求根据响应头中Content-type类型返回对应的响应格式内容:<br />- application/json:返回JSON格式的字符串,如需HTTP响应具体内容,需开发者自行解析<br />- application/octet-stream:ArrayBuffer<br />- 其他:string |
| resultType<sup>9+</sup> | [HttpDataType](#httpdatatype9) | 是 | 返回值类型。 |
| responseCode | [ResponseCode](#responsecode) \| number | 是 | 回调函数执行成功时,此字段为[ResponseCode](#responsecode)。若执行失败,错误码将会从AsyncCallback中的err字段返回。 |
| header | Object | 是 | 发起HTTP请求返回来的响应头。当前返回的是JSON格式字符串,如需具体字段内容,需开发者自行解析。常见字段及解析方式如下:<br/>- Content-Type:header['Content-Type'];<br />- Status-Line:header['Status-Line'];<br />- Date:header.Date/header['Date'];<br />- Server:header.Server/header['Server']; |
| cookies<sup>8+</sup> | Array\<string\> | 是 | 服务器返回的 cookies。 |
## http.createHttpResponseCache<sup>9+</sup>
createHttpResponseCache(cacheSize?: number): HttpResponseCache
创建一个默认的对象来存储HTTP访问请求的响应。
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | --------------------------------------- | ---- | ---------- |
| cacheSize | number | 否 | 缓存大小最大为10\*1024\*1024(10MB),默认最大。 |
**返回值:**
| 类型 | 说明 |
| :---------- | :----------------------------------------------------------- |
| [HttpResponseCache](#httpresponsecache9) | 返回一个存储HTTP访问请求响应的对象。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300008 | Weird server reply |
| 2300009 | Access denied to remote resource |
| 2300016 | Error in the HTTP2 framing layer |
| 2300018 | Transferred a partial file |
| 2300023 | Failed writing received data to disk/application |
| 2300025 | Upload failed |
| 2300026 | Failed to open/read local data from file/application |
| 2300027 | Out of memory |
| 2300028 | Timeout was reached |
| 2300047 | Number of redirects hit maximum amount |
| 2300052 | Server returned nothing (no headers, no data) |
| 2300055 | Failed sending data to the peer |
| 2300056 | Failure when receiving data from the peer |
| 2300058 | Problem with the local SSL certificate |
| 2300059 | Couldn't use specified SSL cipher |
| 2300060 | SSL peer certificate or SSH remote key was not OK |
| 2300061 | Unrecognized or bad HTTP Content or Transfer-Encoding |
| 2300063 | Maximum file size exceeded |
| 2300070 | Disk full or allocation exceeded |
| 2300073 | Remote file already exists |
| 2300077 | Problem with the SSL CA cert (path? access rights?) |
| 2300078 | Remote file not found |
| 2300094 | An authentication function returned an error |
| 2300999 | Unknown Other Error |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
**示例:**
```js
import http from '@ohos.net.http';
let httpResponseCache = http.createHttpResponseCache();
```
## HttpResponseCache<sup>9+</sup>
存储HTTP访问请求响应的对象。
### flush<sup>9+</sup>
flush(callback: AsyncCallback\<void>): void
将缓存中的数据写入文件系统,以便在下一个HTTP请求中访问所有缓存数据,使用callback方式作为异步方法。
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | --------------------------------------- | ---- | ---------- |
| callback | AsyncCallback\<void> | 是 | 回调函数返回写入结果。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol |
| 2300008 | Weird server reply |
| 2300009 | Access denied to remote resource |
| 2300016 | Error in the HTTP2 framing layer |
| 2300018 | Transferred a partial file |
| 2300023 | Failed writing received data to disk/application |
| 2300025 | Upload failed |
| 2300026 | Failed to open/read local data from file/application |
| 2300027 | Out of memory |
| 2300028 | Timeout was reached |
| 2300047 | Number of redirects hit maximum amount |
| 2300052 | Server returned nothing (no headers, no data) |
| 2300055 | Failed sending data to the peer |
| 2300056 | Failure when receiving data from the peer |
| 2300058 | Problem with the local SSL certificate |
| 2300059 | Couldn't use specified SSL cipher |
| 2300060 | SSL peer certificate or SSH remote key was not OK |
| 2300061 | Unrecognized or bad HTTP Content or Transfer-Encoding |
| 2300063 | Maximum file size exceeded |
| 2300070 | Disk full or allocation exceeded |
| 2300073 | Remote file already exists |
| 2300077 | Problem with the SSL CA cert (path? access rights?) |
| 2300078 | Remote file not found |
| 2300094 | An authentication function returned an error |
| 2300999 | Unknown Other Error |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
**示例:**
```js
httpResponseCache.flush(err => {
if (err) {
console.log('flush fail');
return;
}
console.log('flush success');
});
```
### flush<sup>9+</sup>
flush(): Promise\<void>
将缓存中的数据写入文件系统,以便在下一个HTTP请求中访问所有缓存数据,使用Promise方式作为异步方法。
**系统能力**:SystemCapability.Communication.NetStack
**返回值:**
| 类型 | 说明 |
| --------------------------------- | ------------------------------------- |
| Promise\<void>> | 以Promise形式返回写入结果。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol |
| 2300008 | Weird server reply |
| 2300009 | Access denied to remote resource |
| 2300016 | Error in the HTTP2 framing layer |
| 2300018 | Transferred a partial file |
| 2300023 | Failed writing received data to disk/application |
| 2300025 | Upload failed |
| 2300026 | Failed to open/read local data from file/application |
| 2300027 | Out of memory |
| 2300028 | Timeout was reached |
| 2300047 | Number of redirects hit maximum amount |
| 2300052 | Server returned nothing (no headers, no data) |
| 2300055 | Failed sending data to the peer |
| 2300056 | Failure when receiving data from the peer |
| 2300058 | Problem with the local SSL certificate |
| 2300059 | Couldn't use specified SSL cipher |
| 2300060 | SSL peer certificate or SSH remote key was not OK |
| 2300061 | Unrecognized or bad HTTP Content or Transfer-Encoding |
| 2300063 | Maximum file size exceeded |
| 2300070 | Disk full or allocation exceeded |
| 2300073 | Remote file already exists |
| 2300077 | Problem with the SSL CA cert (path? access rights?) |
| 2300078 | Remote file not found |
| 2300094 | An authentication function returned an error |
| 2300999 | Unknown Other Error |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
**示例:**
```js
httpResponseCache.flush().then(() => {
console.log('flush success');
}).catch(err => {
console.log('flush fail');
});
```
### delete<sup>9+</sup>
delete(callback: AsyncCallback\<void>): void
禁用缓存并删除其中的数据,使用callback方式作为异步方法。
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | --------------------------------------- | ---- | ---------- |
| callback | AsyncCallback\<void> | 是 | 回调函数返回删除结果。|
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol |
| 2300003 | URL using bad/illegal format or missing URL |
| 2300005 | Couldn't resolve proxy name |
| 2300006 | Couldn't resolve host name |
| 2300007 | Couldn't connect to server |
| 2300008 | Weird server reply |
| 2300009 | Access denied to remote resource |
| 2300999 | Unknown Other Error |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
**示例:**
```js
httpResponseCache.delete(err => {
if (err) {
console.log('delete fail');
return;
}
console.log('delete success');
});
```
### delete<sup>9+</sup>
delete(): Promise\<void>
禁用缓存并删除其中的数据,使用Promise方式作为异步方法。
**系统能力**:SystemCapability.Communication.NetStack
**返回值:**
| 类型 | 说明 |
| --------------------------------- | ------------------------------------- |
| Promise\<void> | 以Promise形式返回删除结果。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300999 | Unknown Other Error |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
**示例:**
```js
httpResponseCache.delete().then(() => {
console.log('delete success');
}).catch(err => {
console.log('delete fail');
});
```
## HttpDataType<sup>9+</sup>
http的数据类型。
**系统能力**:SystemCapability.Communication.NetStack
| 名称 | 值 | 说明 |
| ------------------ | -- | ----------- |
| STRING | 0 | 字符串类型。 |
| OBJECT | 1 | 对象类型。 |
| ARRAY_BUFFER | 2 | 二进制数组类型。|
## HttpProtocol<sup>9+</sup>
http协议版本。
**系统能力**:SystemCapability.Communication.NetStack
| 名称 | 说明 |
| :-------- | :----------- |
| HTTP1_1 | 协议http1.1 |
| HTTP2 | 协议http2 |
# @ohos.net.http (数据请求)
本模块提供HTTP数据请求能力。应用可以通过HTTP发起一个数据请求,支持常见的GET、POST、OPTIONS、HEAD、PUT、DELETE、TRACE、CONNECT方法。
>**说明:**
>
>本模块首批接口从API version 6开始支持。后续版本的新增接口,采用上角标单独标记接口的起始版本。
>
## 导入模块
```js
import http from '@ohos.net.http';
```
## 完整示例
```js
import http from '@ohos.net.http';
// 每一个httpRequest对应一个HTTP请求任务,不可复用
let httpRequest = http.createHttp();
// 用于订阅HTTP响应头,此接口会比request请求先返回。可以根据业务需要订阅此消息
// 从API 8开始,使用on('headersReceive', Callback)替代on('headerReceive', AsyncCallback)。 8+
httpRequest.on('headersReceive', (header) => {
console.info('header: ' + JSON.stringify(header));
});
httpRequest.request(
// 填写HTTP请求的URL地址,可以带参数也可以不带参数。URL地址需要开发者自定义。请求的参数可以在extraData中指定
"EXAMPLE_URL",
{
method: http.RequestMethod.POST, // 可选,默认为http.RequestMethod.GET
// 开发者根据自身业务需要添加header字段
header: {
'Content-Type': 'application/json'
},
// 当使用POST请求时此字段用于传递内容
extraData: {
"data": "data to send",
},
expectDataType: http.HttpDataType.STRING, // 可选,指定返回数据的类型
usingCache: true, // 可选,默认为true
priority: 1, // 可选,默认为1
connectTimeout: 60000, // 可选,默认为60000ms
readTimeout: 60000, // 可选,默认为60000ms
usingProtocol: http.HttpProtocol.HTTP1_1, // 可选,协议类型默认值由系统自动指定
}, (err, data) => {
if (!err) {
// data.result为HTTP响应内容,可根据业务需要进行解析
console.info('Result:' + data.result);
console.info('code:' + data.responseCode);
// data.header为HTTP响应头,可根据业务需要进行解析
console.info('header:' + JSON.stringify(data.header));
console.info('cookies:' + data.cookies); // 8+
} else {
console.info('error:' + JSON.stringify(err));
// 当该请求使用完毕时,调用destroy方法主动销毁。
httpRequest.destroy();
}
}
);
```
## http.createHttp
createHttp\(\): HttpRequest
创建一个HTTP请求,里面包括发起请求、中断请求、订阅/取消订阅HTTP Response Header事件。每一个HttpRequest对象对应一个HTTP请求。如需发起多个HTTP请求,须为每个HTTP请求创建对应HttpRequest对象。
**系统能力**:SystemCapability.Communication.NetStack
**返回值:**
| 类型 | 说明 |
| :---------- | :----------------------------------------------------------- |
| HttpRequest | 返回一个HttpRequest对象,里面包括request、destroy、on和off方法。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 2300999 | Unknown Other Error. |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
**示例:**
```js
import http from '@ohos.net.http';
let httpRequest = http.createHttp();
```
## HttpRequest
HTTP请求任务。在调用HttpRequest的方法前,需要先通过[createHttp\(\)](#httpcreatehttp)创建一个任务。
### request
request\(url: string, callback: AsyncCallback\<HttpResponse\>\):void
根据URL地址,发起HTTP网络请求,使用callback方式作为异步方法。
**需要权限**:ohos.permission.INTERNET
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | ---------------------------------------------- | ---- | ----------------------- |
| url | string | 是 | 发起网络请求的URL地址。 |
| callback | AsyncCallback\<[HttpResponse](#httpresponse)\> | 是 | 回调函数。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300003 | URL using bad/illegal format or missing URL. |
| 2300007 | Couldn't connect to server. |
| 2300028 | Timeout was reached. |
| 2300052 | Server returned nothing (no headers, no data). |
| 2300999 | Unknown Other Error. |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
**示例:**
```js
httpRequest.request("EXAMPLE_URL", (err, data) => {
if (!err) {
console.info('Result:' + data.result);
console.info('code:' + data.responseCode);
console.info('header:' + JSON.stringify(data.header));
console.info('cookies:' + data.cookies); // 8+
} else {
console.info('error:' + JSON.stringify(err));
}
});
```
### request
request\(url: string, options: HttpRequestOptions, callback: AsyncCallback<HttpResponse\>\):void
根据URL地址和相关配置项,发起HTTP网络请求,使用callback方式作为异步方法。
**需要权限**:ohos.permission.INTERNET
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | ---------------------------------------------- | ---- | ----------------------------------------------- |
| url | string | 是 | 发起网络请求的URL地址。 |
| options | HttpRequestOptions | 是 | 参考[HttpRequestOptions](#httprequestoptions)。 |
| callback | AsyncCallback\<[HttpResponse](#httpresponse)\> | 是 | 回调函数。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol. |
| 2300003 | URL using bad/illegal format or missing URL. |
| 2300005 | Couldn't resolve proxy name. |
| 2300006 | Couldn't resolve host name. |
| 2300007 | Couldn't connect to server. |
| 2300008 | Weird server reply. |
| 2300009 | Access denied to remote resource. |
| 2300016 | Error in the HTTP2 framing layer. |
| 2300018 | Transferred a partial file. |
| 2300023 | Failed writing received data to disk/application. |
| 2300025 | Upload failed. |
| 2300026 | Failed to open/read local data from file/application. |
| 2300027 | Out of memory. |
| 2300028 | Timeout was reached. |
| 2300047 | Number of redirects hit maximum amount. |
| 2300052 | Server returned nothing (no headers, no data). |
| 2300055 | Failed sending data to the peer. |
| 2300056 | Failure when receiving data from the peer. |
| 2300058 | Problem with the local SSL certificate. |
| 2300059 | Couldn't use specified SSL cipher. |
| 2300060 | SSL peer certificate or SSH remote key was not OK. |
| 2300061 | Unrecognized or bad HTTP Content or Transfer-Encoding.|
| 2300063 | Maximum file size exceeded. |
| 2300070 | Disk full or allocation exceeded. |
| 2300073 | Remote file already exists. |
| 2300077 | Problem with the SSL CA cert (path? access rights?). |
| 2300078 | Remote file not found. |
| 2300094 | An authentication function returned an error. |
| 2300999 | Unknown Other Error. |
>**错误码说明:**
>HTTP 错误码映射关系:2300000 + curl错误码。更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)。
**示例:**
```js
httpRequest.request("EXAMPLE_URL",
{
method: http.RequestMethod.GET,
header: {
'Content-Type': 'application/json'
},
readTimeout: 60000,
connectTimeout: 60000
}, (err, data) => {
if (!err) {
console.info('Result:' + data.result);
console.info('code:' + data.responseCode);
console.info('header:' + JSON.stringify(data.header));
console.info('cookies:' + data.cookies); // 8+
console.info('header.Content-Type:' + data.header['Content-Type']);
console.info('header.Status-Line:' + data.header['Status-Line']);
} else {
console.info('error:' + JSON.stringify(err));
}
});
```
### request
request\(url: string, options? : HttpRequestOptions\): Promise<HttpResponse\>
根据URL地址,发起HTTP网络请求,使用Promise方式作为异步方法。
**需要权限**:ohos.permission.INTERNET
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| ------- | ------------------ | ---- | ----------------------------------------------- |
| url | string | 是 | 发起网络请求的URL地址。 |
| options | HttpRequestOptions | 否 | 参考[HttpRequestOptions](#httprequestoptions)。 |
**返回值:**
| 类型 | 说明 |
| :------------------------------------- | :-------------------------------- |
| Promise<[HttpResponse](#httpresponse)> | 以Promise形式返回发起请求的结果。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol. |
| 2300003 | URL using bad/illegal format or missing URL. |
| 2300005 | Couldn't resolve proxy name. |
| 2300006 | Couldn't resolve host name. |
| 2300007 | Couldn't connect to server. |
| 2300008 | Weird server reply. |
| 2300009 | Access denied to remote resource. |
| 2300016 | Error in the HTTP2 framing layer. |
| 2300018 | Transferred a partial file. |
| 2300023 | Failed writing received data to disk/application. |
| 2300025 | Upload failed. |
| 2300026 | Failed to open/read local data from file/application. |
| 2300027 | Out of memory. |
| 2300028 | Timeout was reached. |
| 2300047 | Number of redirects hit maximum amount. |
| 2300052 | Server returned nothing (no headers, no data). |
| 2300055 | Failed sending data to the peer. |
| 2300056 | Failure when receiving data from the peer. |
| 2300058 | Problem with the local SSL certificate. |
| 2300059 | Couldn't use specified SSL cipher. |
| 2300060 | SSL peer certificate or SSH remote key was not OK. |
| 2300061 | Unrecognized or bad HTTP Content or Transfer-Encoding.|
| 2300063 | Maximum file size exceeded. |
| 2300070 | Disk full or allocation exceeded. |
| 2300073 | Remote file already exists. |
| 2300077 | Problem with the SSL CA cert (path? access rights?). |
| 2300078 | Remote file not found. |
| 2300094 | An authentication function returned an error. |
| 2300999 | Unknown Other Error. |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
**示例:**
```js
let promise = httpRequest.request("EXAMPLE_URL", {
method: http.RequestMethod.GET,
connectTimeout: 60000,
readTimeout: 60000,
header: {
'Content-Type': 'application/json'
}
});
promise.then((data) => {
console.info('Result:' + data.result);
console.info('code:' + data.responseCode);
console.info('header:' + JSON.stringify(data.header));
console.info('cookies:' + data.cookies); // 8+
console.info('header.Content-Type:' + data.header['Content-Type']);
console.info('header.Status-Line:' + data.header['Status-Line']);
}).catch((err) => {
console.info('error:' + JSON.stringify(err));
});
```
### destroy
destroy\(\): void
中断请求任务。
**系统能力**:SystemCapability.Communication.NetStack
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 2300999 | Unknown Other Error. |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
**示例:**
```js
httpRequest.destroy();
```
### on\('headerReceive'\)
on\(type: 'headerReceive', callback: AsyncCallback<Object\>\): void
订阅HTTP Response Header 事件。
>![](public_sys-resources/icon-note.gif) **说明:**
>此接口已废弃,建议使用[on\('headersReceive'\)<sup>8+</sup>](#onheadersreceive8)替代。
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | ----------------------- | ---- | --------------------------------- |
| type | string | 是 | 订阅的事件类型,'headerReceive'。 |
| callback | AsyncCallback\<Object\> | 是 | 回调函数。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol |
| 2300003 | URL using bad/illegal format or missing URL |
| 2300005 | Couldn't resolve proxy name |
| 2300006 | Couldn't resolve host name |
| 2300007 | Couldn't connect to server |
| 2300008 | Weird server reply |
| 2300009 | Access denied to remote resource |
| 2300023 | Failed writing received data to disk/application |
| 2300025 | Upload failed |
| 2300027 | Out of memory |
| 2300028 | Timeout was reached |
| 2300052 | Server returned nothing (no headers, no data) |
| 2300056 | Failure when receiving data from the peer |
| 2300058 | Problem with the local SSL certificate |
| 2300060 | SSL peer certificate or SSH remote key was not OK |
| 2300061 | Unrecognized or bad HTTP Content or Transfer-Encoding |
| 2300063 | Maximum file size exceeded |
| 2300070 | Disk full or allocation exceeded |
| 2300077 | Problem with the SSL CA cert (path? access rights?) |
| 2300078 | Remote file not found |
| 2300999 | Unknown Other Error |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
**示例:**
```js
httpRequest.on('headerReceive', (err, data) => {
if (!err) {
console.info('header: ' + JSON.stringify(data));
} else {
console.info('error:' + JSON.stringify(err));
}
});
```
### off\('headerReceive'\)
off\(type: 'headerReceive', callback?: AsyncCallback<Object\>\): void
取消订阅HTTP Response Header 事件。
>![](public_sys-resources/icon-note.gif) **说明:**
>
>1. 此接口已废弃,建议使用[off\('headersReceive'\)<sup>8+</sup>](#offheadersreceive8)替代。
>
>2. 可以指定传入on中的callback取消一个订阅,也可以不指定callback清空所有订阅。
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | ----------------------- | ---- | ------------------------------------- |
| type | string | 是 | 取消订阅的事件类型,'headerReceive'。 |
| callback | AsyncCallback\<Object\> | 否 | 回调函数。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol |
| 2300003 | URL using bad/illegal format or missing URL |
| 2300005 | Couldn't resolve proxy name |
| 2300006 | Couldn't resolve host name |
| 2300007 | Couldn't connect to server |
| 2300008 | Weird server reply |
| 2300009 | Access denied to remote resource |
| 2300999 | Unknown Other Error |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
**示例:**
```js
httpRequest.off('headerReceive');
```
### on\('headersReceive'\)<sup>8+</sup>
on\(type: 'headersReceive', callback: Callback<Object\>\): void
订阅HTTP Response Header 事件。
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | ------------------ | ---- | ---------------------------------- |
| type | string | 是 | 订阅的事件类型:'headersReceive'。 |
| callback | Callback\<Object\> | 是 | 回调函数。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol |
| 2300003 | URL using bad/illegal format or missing URL |
| 2300005 | Couldn't resolve proxy name |
| 2300006 | Couldn't resolve host name |
| 2300007 | Couldn't connect to server |
| 2300008 | Weird server reply |
| 2300009 | Access denied to remote resource |
| 2300023 | Failed writing received data to disk/application |
| 2300025 | Upload failed |
| 2300027 | Out of memory |
| 2300028 | Timeout was reached |
| 2300052 | Server returned nothing (no headers, no data) |
| 2300056 | Failure when receiving data from the peer |
| 2300058 | Problem with the local SSL certificate |
| 2300060 | SSL peer certificate or SSH remote key was not OK |
| 2300061 | Unrecognized or bad HTTP Content or Transfer-Encoding |
| 2300063 | Maximum file size exceeded |
| 2300070 | Disk full or allocation exceeded |
| 2300077 | Problem with the SSL CA cert (path? access rights?) |
| 2300078 | Remote file not found |
| 2300999 | Unknown Other Error |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
**示例:**
```js
httpRequest.on('headersReceive', (header) => {
console.info('header: ' + JSON.stringify(header));
});
```
### off\('headersReceive'\)<sup>8+</sup>
off\(type: 'headersReceive', callback?: Callback<Object\>\): void
取消订阅HTTP Response Header 事件。
>![](public_sys-resources/icon-note.gif) **说明:**
>可以指定传入on中的callback取消一个订阅,也可以不指定callback清空所有订阅。
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | ------------------ | ---- | -------------------------------------- |
| type | string | 是 | 取消订阅的事件类型:'headersReceive'。 |
| callback | Callback\<Object\> | 否 | 回调函数。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol |
| 2300003 | URL using bad/illegal format or missing URL |
| 2300005 | Couldn't resolve proxy name |
| 2300006 | Couldn't resolve host name |
| 2300007 | Couldn't connect to server |
| 2300008 | Weird server reply |
| 2300009 | Access denied to remote resource |
| 2300999 | Unknown Other Error |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
**示例:**
```js
httpRequest.off('headersReceive');
```
### once\('headersReceive'\)<sup>8+</sup>
once\(type: 'headersReceive', callback: Callback<Object\>\): void
订阅HTTP Response Header 事件,但是只触发一次。一旦触发之后,订阅器就会被移除。使用callback方式作为异步方法。
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | ------------------ | ---- | ---------------------------------- |
| type | string | 是 | 订阅的事件类型:'headersReceive'。 |
| callback | Callback\<Object\> | 是 | 回调函数。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol |
| 2300003 | URL using bad/illegal format or missing URL |
| 2300005 | Couldn't resolve proxy name |
| 2300006 | Couldn't resolve host name |
| 2300007 | Couldn't connect to server |
| 2300008 | Weird server reply |
| 2300009 | Access denied to remote resource |
| 2300023 | Failed writing received data to disk/application |
| 2300025 | Upload failed |
| 2300027 | Out of memory |
| 2300028 | Timeout was reached |
| 2300052 | Server returned nothing (no headers, no data) |
| 2300056 | Failure when receiving data from the peer |
| 2300058 | Problem with the local SSL certificate |
| 2300060 | SSL peer certificate or SSH remote key was not OK |
| 2300061 | Unrecognized or bad HTTP Content or Transfer-Encoding |
| 2300063 | Maximum file size exceeded |
| 2300070 | Disk full or allocation exceeded |
| 2300077 | Problem with the SSL CA cert (path? access rights?) |
| 2300078 | Remote file not found |
| 2300999 | Unknown Other Error |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
**示例:**
```js
httpRequest.once('headersReceive', (header) => {
console.info('header: ' + JSON.stringify(header));
});
```
## HttpRequestOptions
发起请求可选参数的类型和取值范围。
**系统能力**:以下各项对应的系统能力均为SystemCapability.Communication.NetStack。
| 名称 | 类型 | 必填 | 说明 |
| -------------- | --------------------------------------------- | ---- | ------------------------------------------------------------ |
| method | [RequestMethod](#requestmethod) | 否 | 请求方式。 |
| extraData | string \| Object \| ArrayBuffer<sup>6+</sup> | 否 | 发送请求的额外数据。<br />- 当HTTP请求为POST、PUT等方法时,此字段为HTTP请求的content。<br />- 当HTTP请求为GET、OPTIONS、DELETE、TRACE、CONNECT等方法时,此字段为HTTP请求的参数补充,参数内容会拼接到URL中进行发送。<sup>6+</sup><br />- 开发者传入string对象,开发者需要自行编码,将编码后的string传入。<sup>6+</sup> |
| expectDataType<sup>9+</sup> | [HttpDataType](#httpdatatype9) | 否 | 指定返回数据的类型。如果设置了此参数,系统将优先返回指定的类型。 |
| usingCache<sup>9+</sup> | boolean | 否 | 是否使用缓存,默认为true。 |
| priority<sup>9+</sup> | number | 否 | 优先级,范围\[1,1000],默认是1。 |
| header | Object | 否 | HTTP请求头字段。默认{'Content-Type': 'application/json'}。 |
| readTimeout | number | 否 | 读取超时时间。单位为毫秒(ms),默认为60000ms。 |
| connectTimeout | number | 否 | 连接超时时间。单位为毫秒(ms),默认为60000ms。 |
| usingProtocol<sup>9+</sup> | [HttpProtocol](#httpprotocol9) | 否 | 使用协议。默认值由系统自动指定。 |
## RequestMethod
HTTP 请求方法。
**系统能力**:以下各项对应的系统能力均为SystemCapability.Communication.NetStack。
| 名称 | 值 | 说明 |
| :------ | ------- | :------------------ |
| OPTIONS | "OPTIONS" | HTTP 请求 OPTIONS。 |
| GET | "GET" | HTTP 请求 GET。 |
| HEAD | "HEAD" | HTTP 请求 HEAD。 |
| POST | "POST" | HTTP 请求 POST。 |
| PUT | "PUT" | HTTP 请求 PUT。 |
| DELETE | "DELETE" | HTTP 请求 DELETE。 |
| TRACE | "TRACE" | HTTP 请求 TRACE。 |
| CONNECT | "CONNECT" | HTTP 请求 CONNECT。 |
## ResponseCode
发起请求返回的响应码。
**系统能力**:以下各项对应的系统能力均为SystemCapability.Communication.NetStack。
| 名称 | 值 | 说明 |
| ----------------- | ---- | ------------------------------------------------------------ |
| OK | 200 | 请求成功。一般用于GET与POST请求。 |
| CREATED | 201 | 已创建。成功请求并创建了新的资源。 |
| ACCEPTED | 202 | 已接受。已经接受请求,但未处理完成。 |
| NOT_AUTHORITATIVE | 203 | 非授权信息。请求成功。 |
| NO_CONTENT | 204 | 无内容。服务器成功处理,但未返回内容。 |
| RESET | 205 | 重置内容。 |
| PARTIAL | 206 | 部分内容。服务器成功处理了部分GET请求。 |
| MULT_CHOICE | 300 | 多种选择。 |
| MOVED_PERM | 301 | 永久移动。请求的资源已被永久的移动到新URI,返回信息会包括新的URI,浏览器会自动定向到新URI。 |
| MOVED_TEMP | 302 | 临时移动。 |
| SEE_OTHER | 303 | 查看其它地址。 |
| NOT_MODIFIED | 304 | 未修改。 |
| USE_PROXY | 305 | 使用代理。 |
| BAD_REQUEST | 400 | 客户端请求的语法错误,服务器无法理解。 |
| UNAUTHORIZED | 401 | 请求要求用户的身份认证。 |
| PAYMENT_REQUIRED | 402 | 保留,将来使用。 |
| FORBIDDEN | 403 | 服务器理解请求客户端的请求,但是拒绝执行此请求。 |
| NOT_FOUND | 404 | 服务器无法根据客户端的请求找到资源(网页)。 |
| BAD_METHOD | 405 | 客户端请求中的方法被禁止。 |
| NOT_ACCEPTABLE | 406 | 服务器无法根据客户端请求的内容特性完成请求。 |
| PROXY_AUTH | 407 | 请求要求代理的身份认证。 |
| CLIENT_TIMEOUT | 408 | 请求时间过长,超时。 |
| CONFLICT | 409 | 服务器完成客户端的PUT请求是可能返回此代码,服务器处理请求时发生了冲突。 |
| GONE | 410 | 客户端请求的资源已经不存在。 |
| LENGTH_REQUIRED | 411 | 服务器无法处理客户端发送的不带Content-Length的请求信息。 |
| PRECON_FAILED | 412 | 客户端请求信息的先决条件错误。 |
| ENTITY_TOO_LARGE | 413 | 由于请求的实体过大,服务器无法处理,因此拒绝请求。 |
| REQ_TOO_LONG | 414 | 请求的URI过长(URI通常为网址),服务器无法处理。 |
| UNSUPPORTED_TYPE | 415 | 服务器无法处理请求的格式。 |
| INTERNAL_ERROR | 500 | 服务器内部错误,无法完成请求。 |
| NOT_IMPLEMENTED | 501 | 服务器不支持请求的功能,无法完成请求。 |
| BAD_GATEWAY | 502 | 充当网关或代理的服务器,从远端服务器接收到了一个无效的请求。 |
| UNAVAILABLE | 503 | 由于超载或系统维护,服务器暂时的无法处理客户端的请求。 |
| GATEWAY_TIMEOUT | 504 | 充当网关或代理的服务器,未及时从远端服务器获取请求。 |
| VERSION | 505 | 服务器请求的HTTP协议的版本。 |
## HttpResponse
request方法回调函数的返回值类型。
**系统能力**:以下各项对应的系统能力均为SystemCapability.Communication.NetStack。
| 名称 | 类型 | 必填 | 说明 |
| -------------------- | -------------------------------------------- | ---- | ------------------------------------------------------------ |
| result | string \| Object \| ArrayBuffer<sup>6+</sup> | 是 | HTTP请求根据响应头中Content-type类型返回对应的响应格式内容:<br />- application/json:返回JSON格式的字符串,如需HTTP响应具体内容,需开发者自行解析<br />- application/octet-stream:ArrayBuffer<br />- 其他:string |
| resultType<sup>9+</sup> | [HttpDataType](#httpdatatype9) | 是 | 返回值类型。 |
| responseCode | [ResponseCode](#responsecode) \| number | 是 | 回调函数执行成功时,此字段为[ResponseCode](#responsecode)。若执行失败,错误码将会从AsyncCallback中的err字段返回。 |
| header | Object | 是 | 发起HTTP请求返回来的响应头。当前返回的是JSON格式字符串,如需具体字段内容,需开发者自行解析。常见字段及解析方式如下:<br/>- Content-Type:header['Content-Type'];<br />- Status-Line:header['Status-Line'];<br />- Date:header.Date/header['Date'];<br />- Server:header.Server/header['Server']; |
| cookies<sup>8+</sup> | Array\<string\> | 是 | 服务器返回的 cookies。 |
## http.createHttpResponseCache<sup>9+</sup>
createHttpResponseCache(cacheSize?: number): HttpResponseCache
创建一个默认的对象来存储HTTP访问请求的响应。
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | --------------------------------------- | ---- | ---------- |
| cacheSize | number | 否 | 缓存大小最大为10\*1024\*1024(10MB),默认最大。 |
**返回值:**
| 类型 | 说明 |
| :---------- | :----------------------------------------------------------- |
| [HttpResponseCache](#httpresponsecache9) | 返回一个存储HTTP访问请求响应的对象。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300008 | Weird server reply |
| 2300009 | Access denied to remote resource |
| 2300016 | Error in the HTTP2 framing layer |
| 2300018 | Transferred a partial file |
| 2300023 | Failed writing received data to disk/application |
| 2300025 | Upload failed |
| 2300026 | Failed to open/read local data from file/application |
| 2300027 | Out of memory |
| 2300028 | Timeout was reached |
| 2300047 | Number of redirects hit maximum amount |
| 2300052 | Server returned nothing (no headers, no data) |
| 2300055 | Failed sending data to the peer |
| 2300056 | Failure when receiving data from the peer |
| 2300058 | Problem with the local SSL certificate |
| 2300059 | Couldn't use specified SSL cipher |
| 2300060 | SSL peer certificate or SSH remote key was not OK |
| 2300061 | Unrecognized or bad HTTP Content or Transfer-Encoding |
| 2300063 | Maximum file size exceeded |
| 2300070 | Disk full or allocation exceeded |
| 2300073 | Remote file already exists |
| 2300077 | Problem with the SSL CA cert (path? access rights?) |
| 2300078 | Remote file not found |
| 2300094 | An authentication function returned an error |
| 2300999 | Unknown Other Error |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
**示例:**
```js
import http from '@ohos.net.http';
let httpResponseCache = http.createHttpResponseCache();
```
## HttpResponseCache<sup>9+</sup>
存储HTTP访问请求响应的对象。
### flush<sup>9+</sup>
flush(callback: AsyncCallback\<void>): void
将缓存中的数据写入文件系统,以便在下一个HTTP请求中访问所有缓存数据,使用callback方式作为异步方法。
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | --------------------------------------- | ---- | ---------- |
| callback | AsyncCallback\<void> | 是 | 回调函数返回写入结果。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol |
| 2300008 | Weird server reply |
| 2300009 | Access denied to remote resource |
| 2300016 | Error in the HTTP2 framing layer |
| 2300018 | Transferred a partial file |
| 2300023 | Failed writing received data to disk/application |
| 2300025 | Upload failed |
| 2300026 | Failed to open/read local data from file/application |
| 2300027 | Out of memory |
| 2300028 | Timeout was reached |
| 2300047 | Number of redirects hit maximum amount |
| 2300052 | Server returned nothing (no headers, no data) |
| 2300055 | Failed sending data to the peer |
| 2300056 | Failure when receiving data from the peer |
| 2300058 | Problem with the local SSL certificate |
| 2300059 | Couldn't use specified SSL cipher |
| 2300060 | SSL peer certificate or SSH remote key was not OK |
| 2300061 | Unrecognized or bad HTTP Content or Transfer-Encoding |
| 2300063 | Maximum file size exceeded |
| 2300070 | Disk full or allocation exceeded |
| 2300073 | Remote file already exists |
| 2300077 | Problem with the SSL CA cert (path? access rights?) |
| 2300078 | Remote file not found |
| 2300094 | An authentication function returned an error |
| 2300999 | Unknown Other Error |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
**示例:**
```js
httpResponseCache.flush(err => {
if (err) {
console.log('flush fail');
return;
}
console.log('flush success');
});
```
### flush<sup>9+</sup>
flush(): Promise\<void>
将缓存中的数据写入文件系统,以便在下一个HTTP请求中访问所有缓存数据,使用Promise方式作为异步方法。
**系统能力**:SystemCapability.Communication.NetStack
**返回值:**
| 类型 | 说明 |
| --------------------------------- | ------------------------------------- |
| Promise\<void>> | 以Promise形式返回写入结果。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol |
| 2300008 | Weird server reply |
| 2300009 | Access denied to remote resource |
| 2300016 | Error in the HTTP2 framing layer |
| 2300018 | Transferred a partial file |
| 2300023 | Failed writing received data to disk/application |
| 2300025 | Upload failed |
| 2300026 | Failed to open/read local data from file/application |
| 2300027 | Out of memory |
| 2300028 | Timeout was reached |
| 2300047 | Number of redirects hit maximum amount |
| 2300052 | Server returned nothing (no headers, no data) |
| 2300055 | Failed sending data to the peer |
| 2300056 | Failure when receiving data from the peer |
| 2300058 | Problem with the local SSL certificate |
| 2300059 | Couldn't use specified SSL cipher |
| 2300060 | SSL peer certificate or SSH remote key was not OK |
| 2300061 | Unrecognized or bad HTTP Content or Transfer-Encoding |
| 2300063 | Maximum file size exceeded |
| 2300070 | Disk full or allocation exceeded |
| 2300073 | Remote file already exists |
| 2300077 | Problem with the SSL CA cert (path? access rights?) |
| 2300078 | Remote file not found |
| 2300094 | An authentication function returned an error |
| 2300999 | Unknown Other Error |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
**示例:**
```js
httpResponseCache.flush().then(() => {
console.log('flush success');
}).catch(err => {
console.log('flush fail');
});
```
### delete<sup>9+</sup>
delete(callback: AsyncCallback\<void>): void
禁用缓存并删除其中的数据,使用callback方式作为异步方法。
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | --------------------------------------- | ---- | ---------- |
| callback | AsyncCallback\<void> | 是 | 回调函数返回删除结果。|
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol |
| 2300003 | URL using bad/illegal format or missing URL |
| 2300005 | Couldn't resolve proxy name |
| 2300006 | Couldn't resolve host name |
| 2300007 | Couldn't connect to server |
| 2300008 | Weird server reply |
| 2300009 | Access denied to remote resource |
| 2300999 | Unknown Other Error |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
**示例:**
```js
httpResponseCache.delete(err => {
if (err) {
console.log('delete fail');
return;
}
console.log('delete success');
});
```
### delete<sup>9+</sup>
delete(): Promise\<void>
禁用缓存并删除其中的数据,使用Promise方式作为异步方法。
**系统能力**:SystemCapability.Communication.NetStack
**返回值:**
| 类型 | 说明 |
| --------------------------------- | ------------------------------------- |
| Promise\<void> | 以Promise形式返回删除结果。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300999 | Unknown Other Error |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
**示例:**
```js
httpResponseCache.delete().then(() => {
console.log('delete success');
}).catch(err => {
console.log('delete fail');
});
```
## HttpDataType<sup>9+</sup>
http的数据类型。
**系统能力**:SystemCapability.Communication.NetStack
| 名称 | 值 | 说明 |
| ------------------ | -- | ----------- |
| STRING | 0 | 字符串类型。 |
| OBJECT | 1 | 对象类型。 |
| ARRAY_BUFFER | 2 | 二进制数组类型。|
## HttpProtocol<sup>9+</sup>
http协议版本。
**系统能力**:SystemCapability.Communication.NetStack
| 名称 | 说明 |
| :-------- | :----------- |
| HTTP1_1 | 协议http1.1 |
| HTTP2 | 协议http2 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol. |
| 2300003 | URL using bad/illegal format or missing URL. |
| 2300005 | Couldn't resolve proxy name. |
| 2300006 | Couldn't resolve host name. |
| 2300007 | Couldn't connect to server. |
| 2300008 | Weird server reply. |
| 2300009 | Access denied to remote resource. |
| 2300016 | Error in the HTTP2 framing layer. |
| 2300018 | Transferred a partial file. |
| 2300023 | Failed writing received data to disk/application. |
| 2300025 | Upload failed. |
| 2300026 | Failed to open/read local data from file/application. |
| 2300027 | Out of memory. |
| 2300028 | Timeout was reached. |
| 2300047 | Number of redirects hit maximum amount. |
| 2300052 | Server returned nothing (no headers, no data). |
| 2300055 | Failed sending data to the peer. |
| 2300056 | Failure when receiving data from the peer. |
| 2300058 | Problem with the local SSL certificate. |
| 2300059 | Couldn't use specified SSL cipher. |
| 2300060 | SSL peer certificate or SSH remote key was not OK. |
| 2300061 | Unrecognized or bad HTTP Content or Transfer-Encoding.|
| 2300063 | Maximum file size exceeded. |
| 2300070 | Disk full or allocation exceeded. |
| 2300073 | Remote file already exists. |
| 2300077 | Problem with the SSL CA cert (path? access rights?). |
| 2300078 | Remote file not found. |
| 2300094 | An authentication function returned an error. |
| 2300999 | Unknown Other Error. |
# @ohos.net.http (数据请求)
本模块提供HTTP数据请求能力。应用可以通过HTTP发起一个数据请求,支持常见的GET、POST、OPTIONS、HEAD、PUT、DELETE、TRACE、CONNECT方法。
>**说明:**
>
>本模块首批接口从API version 6开始支持。后续版本的新增接口,采用上角标单独标记接口的起始版本。
>
## 导入模块
```js
import http from '@ohos.net.http';
```
## 完整示例
```js
import http from '@ohos.net.http';
// 每一个httpRequest对应一个HTTP请求任务,不可复用
let httpRequest = http.createHttp();
// 用于订阅HTTP响应头,此接口会比request请求先返回。可以根据业务需要订阅此消息
// 从API 8开始,使用on('headersReceive', Callback)替代on('headerReceive', AsyncCallback)。 8+
httpRequest.on('headersReceive', (header) => {
console.info('header: ' + JSON.stringify(header));
});
httpRequest.request(
// 填写HTTP请求的URL地址,可以带参数也可以不带参数。URL地址需要开发者自定义。请求的参数可以在extraData中指定
"EXAMPLE_URL",
{
method: http.RequestMethod.POST, // 可选,默认为http.RequestMethod.GET
// 开发者根据自身业务需要添加header字段
header: {
'Content-Type': 'application/json'
},
// 当使用POST请求时此字段用于传递内容
extraData: {
"data": "data to send",
},
expectDataType: http.HttpDataType.STRING, // 可选,指定返回数据的类型
usingCache: true, // 可选,默认为true
priority: 1, // 可选,默认为1
connectTimeout: 60000, // 可选,默认为60000ms
readTimeout: 60000, // 可选,默认为60000ms
usingProtocol: http.HttpProtocol.HTTP1_1, // 可选,协议类型默认值由系统自动指定
}, (err, data) => {
if (!err) {
// data.result为HTTP响应内容,可根据业务需要进行解析
console.info('Result:' + data.result);
console.info('code:' + data.responseCode);
// data.header为HTTP响应头,可根据业务需要进行解析
console.info('header:' + JSON.stringify(data.header));
console.info('cookies:' + data.cookies); // 8+
} else {
console.info('error:' + JSON.stringify(err));
// 当该请求使用完毕时,调用destroy方法主动销毁。
httpRequest.destroy();
}
}
);
```
## http.createHttp
createHttp\(\): HttpRequest
创建一个HTTP请求,里面包括发起请求、中断请求、订阅/取消订阅HTTP Response Header事件。每一个HttpRequest对象对应一个HTTP请求。如需发起多个HTTP请求,须为每个HTTP请求创建对应HttpRequest对象。
**系统能力**:SystemCapability.Communication.NetStack
**返回值:**
| 类型 | 说明 |
| :---------- | :----------------------------------------------------------- |
| HttpRequest | 返回一个HttpRequest对象,里面包括request、destroy、on和off方法。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 2300999 | Unknown Other Error. |
>**错误码说明:**
>HTTP 错误码映射关系:2300000 + curl错误码。更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)。
**示例:**
```js
import http from '@ohos.net.http';
let httpRequest = http.createHttp();
```
## HttpRequest
HTTP请求任务。在调用HttpRequest的方法前,需要先通过[createHttp\(\)](#httpcreatehttp)创建一个任务。
### request
request\(url: string, callback: AsyncCallback\<HttpResponse\>\):void
根据URL地址,发起HTTP网络请求,使用callback方式作为异步方法。
**需要权限**:ohos.permission.INTERNET
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | ---------------------------------------------- | ---- | ----------------------- |
| url | string | 是 | 发起网络请求的URL地址。 |
| callback | AsyncCallback\<[HttpResponse](#httpresponse)\> | 是 | 回调函数。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300003 | URL using bad/illegal format or missing URL. |
| 2300007 | Couldn't connect to server. |
| 2300028 | Timeout was reached. |
| 2300052 | Server returned nothing (no headers, no data). |
| 2300999 | Unknown Other Error. |
>**错误码说明:**
>HTTP 错误码映射关系:2300000 + curl错误码。更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)。
**示例:**
```js
httpRequest.request("EXAMPLE_URL", (err, data) => {
if (!err) {
console.info('Result:' + data.result);
console.info('code:' + data.responseCode);
console.info('header:' + JSON.stringify(data.header));
console.info('cookies:' + data.cookies); // 8+
} else {
console.info('error:' + JSON.stringify(err));
}
});
```
### request
request\(url: string, options: HttpRequestOptions, callback: AsyncCallback<HttpResponse\>\):void
根据URL地址和相关配置项,发起HTTP网络请求,使用callback方式作为异步方法。
**需要权限**:ohos.permission.INTERNET
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | ---------------------------------------------- | ---- | ----------------------------------------------- |
| url | string | 是 | 发起网络请求的URL地址。 |
| options | HttpRequestOptions | 是 | 参考[HttpRequestOptions](#httprequestoptions)。 |
| callback | AsyncCallback\<[HttpResponse](#httpresponse)\> | 是 | 回调函数。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol. |
| 2300003 | URL using bad/illegal format or missing URL. |
| 2300005 | Couldn't resolve proxy name. |
| 2300006 | Couldn't resolve host name. |
| 2300007 | Couldn't connect to server. |
| 2300008 | Weird server reply. |
| 2300009 | Access denied to remote resource. |
| 2300016 | Error in the HTTP2 framing layer. |
| 2300018 | Transferred a partial file. |
| 2300023 | Failed writing received data to disk/application. |
| 2300025 | Upload failed. |
| 2300026 | Failed to open/read local data from file/application. |
| 2300027 | Out of memory. |
| 2300028 | Timeout was reached. |
| 2300047 | Number of redirects hit maximum amount. |
| 2300052 | Server returned nothing (no headers, no data). |
| 2300055 | Failed sending data to the peer. |
| 2300056 | Failure when receiving data from the peer. |
| 2300058 | Problem with the local SSL certificate. |
| 2300059 | Couldn't use specified SSL cipher. |
| 2300060 | SSL peer certificate or SSH remote key was not OK. |
| 2300061 | Unrecognized or bad HTTP Content or Transfer-Encoding.|
| 2300063 | Maximum file size exceeded. |
| 2300070 | Disk full or allocation exceeded. |
| 2300073 | Remote file already exists. |
| 2300077 | Problem with the SSL CA cert (path? access rights?). |
| 2300078 | Remote file not found. |
| 2300094 | An authentication function returned an error. |
| 2300999 | Unknown Other Error. |
>**错误码说明:**
>HTTP 错误码映射关系:2300000 + curl错误码。更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)。
**示例:**
```js
httpRequest.request("EXAMPLE_URL",
{
method: http.RequestMethod.GET,
header: {
'Content-Type': 'application/json'
},
readTimeout: 60000,
connectTimeout: 60000
}, (err, data) => {
if (!err) {
console.info('Result:' + data.result);
console.info('code:' + data.responseCode);
console.info('header:' + JSON.stringify(data.header));
console.info('cookies:' + data.cookies); // 8+
console.info('header.Content-Type:' + data.header['Content-Type']);
console.info('header.Status-Line:' + data.header['Status-Line']);
} else {
console.info('error:' + JSON.stringify(err));
}
});
```
### request
request\(url: string, options? : HttpRequestOptions\): Promise<HttpResponse\>
根据URL地址,发起HTTP网络请求,使用Promise方式作为异步方法。
**需要权限**:ohos.permission.INTERNET
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| ------- | ------------------ | ---- | ----------------------------------------------- |
| url | string | 是 | 发起网络请求的URL地址。 |
| options | HttpRequestOptions | 否 | 参考[HttpRequestOptions](#httprequestoptions)。 |
**返回值:**
| 类型 | 说明 |
| :------------------------------------- | :-------------------------------- |
| Promise<[HttpResponse](#httpresponse)> | 以Promise形式返回发起请求的结果。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol. |
| 2300003 | URL using bad/illegal format or missing URL. |
| 2300005 | Couldn't resolve proxy name. |
| 2300006 | Couldn't resolve host name. |
| 2300007 | Couldn't connect to server. |
| 2300008 | Weird server reply. |
| 2300009 | Access denied to remote resource. |
| 2300016 | Error in the HTTP2 framing layer. |
| 2300018 | Transferred a partial file. |
| 2300023 | Failed writing received data to disk/application. |
| 2300025 | Upload failed. |
| 2300026 | Failed to open/read local data from file/application. |
| 2300027 | Out of memory. |
| 2300028 | Timeout was reached. |
| 2300047 | Number of redirects hit maximum amount. |
| 2300052 | Server returned nothing (no headers, no data). |
| 2300055 | Failed sending data to the peer. |
| 2300056 | Failure when receiving data from the peer. |
| 2300058 | Problem with the local SSL certificate. |
| 2300059 | Couldn't use specified SSL cipher. |
| 2300060 | SSL peer certificate or SSH remote key was not OK. |
| 2300061 | Unrecognized or bad HTTP Content or Transfer-Encoding.|
| 2300063 | Maximum file size exceeded. |
| 2300070 | Disk full or allocation exceeded. |
| 2300073 | Remote file already exists. |
| 2300077 | Problem with the SSL CA cert (path? access rights?). |
| 2300078 | Remote file not found. |
| 2300094 | An authentication function returned an error. |
| 2300999 | Unknown Other Error. |
>**错误码说明:**
>HTTP 错误码映射关系:2300000 + curl错误码。更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)。
**示例:**
```js
let promise = httpRequest.request("EXAMPLE_URL", {
method: http.RequestMethod.GET,
connectTimeout: 60000,
readTimeout: 60000,
header: {
'Content-Type': 'application/json'
}
});
promise.then((data) => {
console.info('Result:' + data.result);
console.info('code:' + data.responseCode);
console.info('header:' + JSON.stringify(data.header));
console.info('cookies:' + data.cookies); // 8+
console.info('header.Content-Type:' + data.header['Content-Type']);
console.info('header.Status-Line:' + data.header['Status-Line']);
}).catch((err) => {
console.info('error:' + JSON.stringify(err));
});
```
### destroy
destroy\(\): void
中断请求任务。
**系统能力**:SystemCapability.Communication.NetStack
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 2300999 | Unknown Other Error. |
>**错误码说明:**
>HTTP 错误码映射关系:2300000 + curl错误码。更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)。
**示例:**
```js
httpRequest.destroy();
```
### on\('headerReceive'\)
on\(type: 'headerReceive', callback: AsyncCallback<Object\>\): void
订阅HTTP Response Header 事件。
>![](public_sys-resources/icon-note.gif) **说明:**
>此接口已废弃,建议使用[on\('headersReceive'\)<sup>8+</sup>](#onheadersreceive8)替代。
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | ----------------------- | ---- | --------------------------------- |
| type | string | 是 | 订阅的事件类型,'headerReceive'。 |
| callback | AsyncCallback\<Object\> | 是 | 回调函数。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol. |
| 2300003 | URL using bad/illegal format or missing URL. |
| 2300005 | Couldn't resolve proxy name. |
| 2300006 | Couldn't resolve host name. |
| 2300007 | Couldn't connect to server. |
| 2300008 | Weird server reply. |
| 2300009 | Access denied to remote resource. |
| 2300016 | Error in the HTTP2 framing layer. |
| 2300018 | Transferred a partial file. |
| 2300023 | Failed writing received data to disk/application. |
| 2300025 | Upload failed. |
| 2300026 | Failed to open/read local data from file/application. |
| 2300027 | Out of memory. |
| 2300028 | Timeout was reached. |
| 2300047 | Number of redirects hit maximum amount. |
| 2300052 | Server returned nothing (no headers, no data). |
| 2300055 | Failed sending data to the peer. |
| 2300056 | Failure when receiving data from the peer. |
| 2300058 | Problem with the local SSL certificate. |
| 2300059 | Couldn't use specified SSL cipher. |
| 2300060 | SSL peer certificate or SSH remote key was not OK. |
| 2300061 | Unrecognized or bad HTTP Content or Transfer-Encoding.|
| 2300063 | Maximum file size exceeded. |
| 2300070 | Disk full or allocation exceeded. |
| 2300073 | Remote file already exists. |
| 2300077 | Problem with the SSL CA cert (path? access rights?). |
| 2300078 | Remote file not found. |
| 2300094 | An authentication function returned an error. |
| 2300999 | Unknown Other Error. |
>**错误码说明:**
>HTTP 错误码映射关系:2300000 + curl错误码。更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)。
**示例:**
```js
httpRequest.on('headerReceive', (err, data) => {
if (!err) {
console.info('header: ' + JSON.stringify(data));
} else {
console.info('error:' + JSON.stringify(err));
}
});
```
### off\('headerReceive'\)
off\(type: 'headerReceive', callback?: AsyncCallback<Object\>\): void
取消订阅HTTP Response Header 事件。
>![](public_sys-resources/icon-note.gif) **说明:**
>
>1. 此接口已废弃,建议使用[off\('headersReceive'\)<sup>8+</sup>](#offheadersreceive8)替代。
>
>2. 可以指定传入on中的callback取消一个订阅,也可以不指定callback清空所有订阅。
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | ----------------------- | ---- | ------------------------------------- |
| type | string | 是 | 取消订阅的事件类型,'headerReceive'。 |
| callback | AsyncCallback\<Object\> | 否 | 回调函数。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol. |
| 2300003 | URL using bad/illegal format or missing URL. |
| 2300005 | Couldn't resolve proxy name. |
| 2300006 | Couldn't resolve host name. |
| 2300007 | Couldn't connect to server. |
| 2300008 | Weird server reply. |
| 2300009 | Access denied to remote resource. |
| 2300016 | Error in the HTTP2 framing layer. |
| 2300018 | Transferred a partial file. |
| 2300023 | Failed writing received data to disk/application. |
| 2300025 | Upload failed. |
| 2300026 | Failed to open/read local data from file/application. |
| 2300027 | Out of memory. |
| 2300028 | Timeout was reached. |
| 2300047 | Number of redirects hit maximum amount. |
| 2300052 | Server returned nothing (no headers, no data). |
| 2300055 | Failed sending data to the peer. |
| 2300056 | Failure when receiving data from the peer. |
| 2300058 | Problem with the local SSL certificate. |
| 2300059 | Couldn't use specified SSL cipher. |
| 2300060 | SSL peer certificate or SSH remote key was not OK. |
| 2300061 | Unrecognized or bad HTTP Content or Transfer-Encoding.|
| 2300063 | Maximum file size exceeded. |
| 2300070 | Disk full or allocation exceeded. |
| 2300073 | Remote file already exists. |
| 2300077 | Problem with the SSL CA cert (path? access rights?). |
| 2300078 | Remote file not found. |
| 2300094 | An authentication function returned an error. |
| 2300999 | Unknown Other Error. |
>**错误码说明:**
>HTTP 错误码映射关系:2300000 + curl错误码。更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)。
**示例:**
```js
httpRequest.off('headerReceive');
```
### on\('headersReceive'\)<sup>8+</sup>
on\(type: 'headersReceive', callback: Callback<Object\>\): void
订阅HTTP Response Header 事件。
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | ------------------ | ---- | ---------------------------------- |
| type | string | 是 | 订阅的事件类型:'headersReceive'。 |
| callback | Callback\<Object\> | 是 | 回调函数。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol. |
| 2300003 | URL using bad/illegal format or missing URL. |
| 2300005 | Couldn't resolve proxy name. |
| 2300006 | Couldn't resolve host name. |
| 2300007 | Couldn't connect to server. |
| 2300008 | Weird server reply. |
| 2300009 | Access denied to remote resource. |
| 2300016 | Error in the HTTP2 framing layer. |
| 2300018 | Transferred a partial file. |
| 2300023 | Failed writing received data to disk/application. |
| 2300025 | Upload failed. |
| 2300026 | Failed to open/read local data from file/application. |
| 2300027 | Out of memory. |
| 2300028 | Timeout was reached. |
| 2300047 | Number of redirects hit maximum amount. |
| 2300052 | Server returned nothing (no headers, no data). |
| 2300055 | Failed sending data to the peer. |
| 2300056 | Failure when receiving data from the peer. |
| 2300058 | Problem with the local SSL certificate. |
| 2300059 | Couldn't use specified SSL cipher. |
| 2300060 | SSL peer certificate or SSH remote key was not OK. |
| 2300061 | Unrecognized or bad HTTP Content or Transfer-Encoding.|
| 2300063 | Maximum file size exceeded. |
| 2300070 | Disk full or allocation exceeded. |
| 2300073 | Remote file already exists. |
| 2300077 | Problem with the SSL CA cert (path? access rights?). |
| 2300078 | Remote file not found. |
| 2300094 | An authentication function returned an error. |
| 2300999 | Unknown Other Error. |
>**错误码说明:**
>HTTP 错误码映射关系:2300000 + curl错误码。更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)。
**示例:**
```js
httpRequest.on('headersReceive', (header) => {
console.info('header: ' + JSON.stringify(header));
});
```
### off\('headersReceive'\)<sup>8+</sup>
off\(type: 'headersReceive', callback?: Callback<Object\>\): void
取消订阅HTTP Response Header 事件。
>![](public_sys-resources/icon-note.gif) **说明:**
>可以指定传入on中的callback取消一个订阅,也可以不指定callback清空所有订阅。
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | ------------------ | ---- | -------------------------------------- |
| type | string | 是 | 取消订阅的事件类型:'headersReceive'。 |
| callback | Callback\<Object\> | 否 | 回调函数。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol. |
| 2300003 | URL using bad/illegal format or missing URL. |
| 2300005 | Couldn't resolve proxy name. |
| 2300006 | Couldn't resolve host name. |
| 2300007 | Couldn't connect to server. |
| 2300008 | Weird server reply. |
| 2300009 | Access denied to remote resource. |
| 2300016 | Error in the HTTP2 framing layer. |
| 2300018 | Transferred a partial file. |
| 2300023 | Failed writing received data to disk/application. |
| 2300025 | Upload failed. |
| 2300026 | Failed to open/read local data from file/application. |
| 2300027 | Out of memory. |
| 2300028 | Timeout was reached. |
| 2300047 | Number of redirects hit maximum amount. |
| 2300052 | Server returned nothing (no headers, no data). |
| 2300055 | Failed sending data to the peer. |
| 2300056 | Failure when receiving data from the peer. |
| 2300058 | Problem with the local SSL certificate. |
| 2300059 | Couldn't use specified SSL cipher. |
| 2300060 | SSL peer certificate or SSH remote key was not OK. |
| 2300061 | Unrecognized or bad HTTP Content or Transfer-Encoding.|
| 2300063 | Maximum file size exceeded. |
| 2300070 | Disk full or allocation exceeded. |
| 2300073 | Remote file already exists. |
| 2300077 | Problem with the SSL CA cert (path? access rights?). |
| 2300078 | Remote file not found. |
| 2300094 | An authentication function returned an error. |
| 2300999 | Unknown Other Error. |
>**错误码说明:**
>HTTP 错误码映射关系:2300000 + curl错误码。更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)。
**示例:**
```js
httpRequest.off('headersReceive');
```
### once\('headersReceive'\)<sup>8+</sup>
once\(type: 'headersReceive', callback: Callback<Object\>\): void
订阅HTTP Response Header 事件,但是只触发一次。一旦触发之后,订阅器就会被移除。使用callback方式作为异步方法。
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | ------------------ | ---- | ---------------------------------- |
| type | string | 是 | 订阅的事件类型:'headersReceive'。 |
| callback | Callback\<Object\> | 是 | 回调函数。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol. |
| 2300003 | URL using bad/illegal format or missing URL. |
| 2300005 | Couldn't resolve proxy name. |
| 2300006 | Couldn't resolve host name. |
| 2300007 | Couldn't connect to server. |
| 2300008 | Weird server reply. |
| 2300009 | Access denied to remote resource. |
| 2300016 | Error in the HTTP2 framing layer. |
| 2300018 | Transferred a partial file. |
| 2300023 | Failed writing received data to disk/application. |
| 2300025 | Upload failed. |
| 2300026 | Failed to open/read local data from file/application. |
| 2300027 | Out of memory. |
| 2300028 | Timeout was reached. |
| 2300047 | Number of redirects hit maximum amount. |
| 2300052 | Server returned nothing (no headers, no data). |
| 2300055 | Failed sending data to the peer. |
| 2300056 | Failure when receiving data from the peer. |
| 2300058 | Problem with the local SSL certificate. |
| 2300059 | Couldn't use specified SSL cipher. |
| 2300060 | SSL peer certificate or SSH remote key was not OK. |
| 2300061 | Unrecognized or bad HTTP Content or Transfer-Encoding.|
| 2300063 | Maximum file size exceeded. |
| 2300070 | Disk full or allocation exceeded. |
| 2300073 | Remote file already exists. |
| 2300077 | Problem with the SSL CA cert (path? access rights?). |
| 2300078 | Remote file not found. |
| 2300094 | An authentication function returned an error. |
| 2300999 | Unknown Other Error. |
>**错误码说明:**
>HTTP 错误码映射关系:2300000 + curl错误码。更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)。
**示例:**
```js
httpRequest.once('headersReceive', (header) => {
console.info('header: ' + JSON.stringify(header));
});
```
## HttpRequestOptions
发起请求可选参数的类型和取值范围。
**系统能力**:以下各项对应的系统能力均为SystemCapability.Communication.NetStack。
| 名称 | 类型 | 必填 | 说明 |
| -------------- | --------------------------------------------- | ---- | ------------------------------------------------------------ |
| method | [RequestMethod](#requestmethod) | 否 | 请求方式。 |
| extraData | string \| Object \| ArrayBuffer<sup>6+</sup> | 否 | 发送请求的额外数据。<br />- 当HTTP请求为POST、PUT等方法时,此字段为HTTP请求的content。<br />- 当HTTP请求为GET、OPTIONS、DELETE、TRACE、CONNECT等方法时,此字段为HTTP请求的参数补充,参数内容会拼接到URL中进行发送。<sup>6+</sup><br />- 开发者传入string对象,开发者需要自行编码,将编码后的string传入。<sup>6+</sup> |
| expectDataType<sup>9+</sup> | [HttpDataType](#httpdatatype9) | 否 | 指定返回数据的类型。如果设置了此参数,系统将优先返回指定的类型。 |
| usingCache<sup>9+</sup> | boolean | 否 | 是否使用缓存,默认为true。 |
| priority<sup>9+</sup> | number | 否 | 优先级,范围\[1,1000],默认是1。 |
| header | Object | 否 | HTTP请求头字段。默认{'Content-Type': 'application/json'}。 |
| readTimeout | number | 否 | 读取超时时间。单位为毫秒(ms),默认为60000ms。 |
| connectTimeout | number | 否 | 连接超时时间。单位为毫秒(ms),默认为60000ms。 |
| usingProtocol<sup>9+</sup> | [HttpProtocol](#httpprotocol9) | 否 | 使用协议。默认值由系统自动指定。 |
## RequestMethod
HTTP 请求方法。
**系统能力**:以下各项对应的系统能力均为SystemCapability.Communication.NetStack。
| 名称 | 值 | 说明 |
| :------ | ------- | :------------------ |
| OPTIONS | "OPTIONS" | HTTP 请求 OPTIONS。 |
| GET | "GET" | HTTP 请求 GET。 |
| HEAD | "HEAD" | HTTP 请求 HEAD。 |
| POST | "POST" | HTTP 请求 POST。 |
| PUT | "PUT" | HTTP 请求 PUT。 |
| DELETE | "DELETE" | HTTP 请求 DELETE。 |
| TRACE | "TRACE" | HTTP 请求 TRACE。 |
| CONNECT | "CONNECT" | HTTP 请求 CONNECT。 |
## ResponseCode
发起请求返回的响应码。
**系统能力**:以下各项对应的系统能力均为SystemCapability.Communication.NetStack。
| 名称 | 值 | 说明 |
| ----------------- | ---- | ------------------------------------------------------------ |
| OK | 200 | 请求成功。一般用于GET与POST请求。 |
| CREATED | 201 | 已创建。成功请求并创建了新的资源。 |
| ACCEPTED | 202 | 已接受。已经接受请求,但未处理完成。 |
| NOT_AUTHORITATIVE | 203 | 非授权信息。请求成功。 |
| NO_CONTENT | 204 | 无内容。服务器成功处理,但未返回内容。 |
| RESET | 205 | 重置内容。 |
| PARTIAL | 206 | 部分内容。服务器成功处理了部分GET请求。 |
| MULT_CHOICE | 300 | 多种选择。 |
| MOVED_PERM | 301 | 永久移动。请求的资源已被永久的移动到新URI,返回信息会包括新的URI,浏览器会自动定向到新URI。 |
| MOVED_TEMP | 302 | 临时移动。 |
| SEE_OTHER | 303 | 查看其它地址。 |
| NOT_MODIFIED | 304 | 未修改。 |
| USE_PROXY | 305 | 使用代理。 |
| BAD_REQUEST | 400 | 客户端请求的语法错误,服务器无法理解。 |
| UNAUTHORIZED | 401 | 请求要求用户的身份认证。 |
| PAYMENT_REQUIRED | 402 | 保留,将来使用。 |
| FORBIDDEN | 403 | 服务器理解请求客户端的请求,但是拒绝执行此请求。 |
| NOT_FOUND | 404 | 服务器无法根据客户端的请求找到资源(网页)。 |
| BAD_METHOD | 405 | 客户端请求中的方法被禁止。 |
| NOT_ACCEPTABLE | 406 | 服务器无法根据客户端请求的内容特性完成请求。 |
| PROXY_AUTH | 407 | 请求要求代理的身份认证。 |
| CLIENT_TIMEOUT | 408 | 请求时间过长,超时。 |
| CONFLICT | 409 | 服务器完成客户端的PUT请求是可能返回此代码,服务器处理请求时发生了冲突。 |
| GONE | 410 | 客户端请求的资源已经不存在。 |
| LENGTH_REQUIRED | 411 | 服务器无法处理客户端发送的不带Content-Length的请求信息。 |
| PRECON_FAILED | 412 | 客户端请求信息的先决条件错误。 |
| ENTITY_TOO_LARGE | 413 | 由于请求的实体过大,服务器无法处理,因此拒绝请求。 |
| REQ_TOO_LONG | 414 | 请求的URI过长(URI通常为网址),服务器无法处理。 |
| UNSUPPORTED_TYPE | 415 | 服务器无法处理请求的格式。 |
| INTERNAL_ERROR | 500 | 服务器内部错误,无法完成请求。 |
| NOT_IMPLEMENTED | 501 | 服务器不支持请求的功能,无法完成请求。 |
| BAD_GATEWAY | 502 | 充当网关或代理的服务器,从远端服务器接收到了一个无效的请求。 |
| UNAVAILABLE | 503 | 由于超载或系统维护,服务器暂时的无法处理客户端的请求。 |
| GATEWAY_TIMEOUT | 504 | 充当网关或代理的服务器,未及时从远端服务器获取请求。 |
| VERSION | 505 | 服务器请求的HTTP协议的版本。 |
## HttpResponse
request方法回调函数的返回值类型。
**系统能力**:以下各项对应的系统能力均为SystemCapability.Communication.NetStack。
| 名称 | 类型 | 必填 | 说明 |
| -------------------- | -------------------------------------------- | ---- | ------------------------------------------------------------ |
| result | string \| Object \| ArrayBuffer<sup>6+</sup> | 是 | HTTP请求根据响应头中Content-type类型返回对应的响应格式内容:<br />- application/json:返回JSON格式的字符串,如需HTTP响应具体内容,需开发者自行解析<br />- application/octet-stream:ArrayBuffer<br />- 其他:string |
| resultType<sup>9+</sup> | [HttpDataType](#httpdatatype9) | 是 | 返回值类型。 |
| responseCode | [ResponseCode](#responsecode) \| number | 是 | 回调函数执行成功时,此字段为[ResponseCode](#responsecode)。若执行失败,错误码将会从AsyncCallback中的err字段返回。 |
| header | Object | 是 | 发起HTTP请求返回来的响应头。当前返回的是JSON格式字符串,如需具体字段内容,需开发者自行解析。常见字段及解析方式如下:<br/>- Content-Type:header['Content-Type'];<br />- Status-Line:header['Status-Line'];<br />- Date:header.Date/header['Date'];<br />- Server:header.Server/header['Server']; |
| cookies<sup>8+</sup> | Array\<string\> | 是 | 服务器返回的 cookies。 |
## http.createHttpResponseCache<sup>9+</sup>
createHttpResponseCache(cacheSize?: number): HttpResponseCache
创建一个默认的对象来存储HTTP访问请求的响应。
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | --------------------------------------- | ---- | ---------- |
| cacheSize | number | 否 | 缓存大小最大为10\*1024\*1024(10MB),默认最大。 |
**返回值:**
| 类型 | 说明 |
| :---------- | :----------------------------------------------------------- |
| [HttpResponseCache](#httpresponsecache9) | 返回一个存储HTTP访问请求响应的对象。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol. |
| 2300003 | URL using bad/illegal format or missing URL. |
| 2300005 | Couldn't resolve proxy name. |
| 2300006 | Couldn't resolve host name. |
| 2300007 | Couldn't connect to server. |
| 2300008 | Weird server reply. |
| 2300009 | Access denied to remote resource. |
| 2300016 | Error in the HTTP2 framing layer. |
| 2300018 | Transferred a partial file. |
| 2300023 | Failed writing received data to disk/application. |
| 2300025 | Upload failed. |
| 2300026 | Failed to open/read local data from file/application. |
| 2300027 | Out of memory. |
| 2300028 | Timeout was reached. |
| 2300047 | Number of redirects hit maximum amount. |
| 2300052 | Server returned nothing (no headers, no data). |
| 2300055 | Failed sending data to the peer. |
| 2300056 | Failure when receiving data from the peer. |
| 2300058 | Problem with the local SSL certificate. |
| 2300059 | Couldn't use specified SSL cipher. |
| 2300060 | SSL peer certificate or SSH remote key was not OK. |
| 2300061 | Unrecognized or bad HTTP Content or Transfer-Encoding.|
| 2300063 | Maximum file size exceeded. |
| 2300070 | Disk full or allocation exceeded. |
| 2300073 | Remote file already exists. |
| 2300077 | Problem with the SSL CA cert (path? access rights?). |
| 2300078 | Remote file not found. |
| 2300094 | An authentication function returned an error. |
| 2300999 | Unknown Other Error. |
>**错误码说明:**
>HTTP 错误码映射关系:2300000 + curl错误码。更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)。
**示例:**
```js
import http from '@ohos.net.http';
let httpResponseCache = http.createHttpResponseCache();
```
## HttpResponseCache<sup>9+</sup>
存储HTTP访问请求响应的对象。
### flush<sup>9+</sup>
flush(callback: AsyncCallback\<void>): void
将缓存中的数据写入文件系统,以便在下一个HTTP请求中访问所有缓存数据,使用callback方式作为异步方法。
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | --------------------------------------- | ---- | ---------- |
| callback | AsyncCallback\<void> | 是 | 回调函数返回写入结果。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol. |
| 2300003 | URL using bad/illegal format or missing URL. |
| 2300005 | Couldn't resolve proxy name. |
| 2300006 | Couldn't resolve host name. |
| 2300007 | Couldn't connect to server. |
| 2300008 | Weird server reply. |
| 2300009 | Access denied to remote resource. |
| 2300016 | Error in the HTTP2 framing layer. |
| 2300018 | Transferred a partial file. |
| 2300023 | Failed writing received data to disk/application. |
| 2300025 | Upload failed. |
| 2300026 | Failed to open/read local data from file/application. |
| 2300027 | Out of memory. |
| 2300028 | Timeout was reached. |
| 2300047 | Number of redirects hit maximum amount. |
| 2300052 | Server returned nothing (no headers, no data). |
| 2300055 | Failed sending data to the peer. |
| 2300056 | Failure when receiving data from the peer. |
| 2300058 | Problem with the local SSL certificate. |
| 2300059 | Couldn't use specified SSL cipher. |
| 2300060 | SSL peer certificate or SSH remote key was not OK. |
| 2300061 | Unrecognized or bad HTTP Content or Transfer-Encoding.|
| 2300063 | Maximum file size exceeded. |
| 2300070 | Disk full or allocation exceeded. |
| 2300073 | Remote file already exists. |
| 2300077 | Problem with the SSL CA cert (path? access rights?). |
| 2300078 | Remote file not found. |
| 2300094 | An authentication function returned an error. |
| 2300999 | Unknown Other Error. |
>**错误码说明:**
>HTTP 错误码映射关系:2300000 + curl错误码。更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)。
**示例:**
```js
httpResponseCache.flush().then(() => {
console.log('flush success');
}).catch(err => {
console.log('flush fail');
});
```
### delete<sup>9+</sup>
delete(callback: AsyncCallback\<void>): void
禁用缓存并删除其中的数据,使用callback方式作为异步方法。
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | --------------------------------------- | ---- | ---------- |
| callback | AsyncCallback\<void> | 是 | 回调函数返回删除结果。|
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol. |
| 2300003 | URL using bad/illegal format or missing URL. |
| 2300005 | Couldn't resolve proxy name. |
| 2300006 | Couldn't resolve host name. |
| 2300007 | Couldn't connect to server. |
| 2300008 | Weird server reply. |
| 2300009 | Access denied to remote resource. |
| 2300016 | Error in the HTTP2 framing layer. |
| 2300018 | Transferred a partial file. |
| 2300023 | Failed writing received data to disk/application. |
| 2300025 | Upload failed. |
| 2300026 | Failed to open/read local data from file/application. |
| 2300027 | Out of memory. |
| 2300028 | Timeout was reached. |
| 2300047 | Number of redirects hit maximum amount. |
| 2300052 | Server returned nothing (no headers, no data). |
| 2300055 | Failed sending data to the peer. |
| 2300056 | Failure when receiving data from the peer. |
| 2300058 | Problem with the local SSL certificate. |
| 2300059 | Couldn't use specified SSL cipher. |
| 2300060 | SSL peer certificate or SSH remote key was not OK. |
| 2300061 | Unrecognized or bad HTTP Content or Transfer-Encoding.|
| 2300063 | Maximum file size exceeded. |
| 2300070 | Disk full or allocation exceeded. |
| 2300073 | Remote file already exists. |
| 2300077 | Problem with the SSL CA cert (path? access rights?). |
| 2300078 | Remote file not found. |
| 2300094 | An authentication function returned an error. |
| 2300999 | Unknown Other Error. |
>**错误码说明:**
>HTTP 错误码映射关系:2300000 + curl错误码。更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)。
**示例:**
```js
httpResponseCache.delete(err => {
if (err) {
console.log('delete fail');
return;
}
console.log('delete success');
});
```
### delete<sup>9+</sup>
delete(): Promise\<void>
禁用缓存并删除其中的数据,使用Promise方式作为异步方法。
**系统能力**:SystemCapability.Communication.NetStack
**返回值:**
| 类型 | 说明 |
| --------------------------------- | ------------------------------------- |
| Promise\<void> | 以Promise形式返回删除结果。 |
**错误码:**
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol. |
| 2300003 | URL using bad/illegal format or missing URL. |
| 2300005 | Couldn't resolve proxy name. |
| 2300006 | Couldn't resolve host name. |
| 2300007 | Couldn't connect to server. |
| 2300008 | Weird server reply. |
| 2300009 | Access denied to remote resource. |
| 2300016 | Error in the HTTP2 framing layer. |
| 2300018 | Transferred a partial file. |
| 2300023 | Failed writing received data to disk/application. |
| 2300025 | Upload failed. |
| 2300026 | Failed to open/read local data from file/application. |
| 2300027 | Out of memory. |
| 2300028 | Timeout was reached. |
| 2300047 | Number of redirects hit maximum amount. |
| 2300052 | Server returned nothing (no headers, no data). |
| 2300055 | Failed sending data to the peer. |
| 2300056 | Failure when receiving data from the peer. |
| 2300058 | Problem with the local SSL certificate. |
| 2300059 | Couldn't use specified SSL cipher. |
| 2300060 | SSL peer certificate or SSH remote key was not OK. |
| 2300061 | Unrecognized or bad HTTP Content or Transfer-Encoding.|
| 2300063 | Maximum file size exceeded. |
| 2300070 | Disk full or allocation exceeded. |
| 2300073 | Remote file already exists. |
| 2300077 | Problem with the SSL CA cert (path? access rights?). |
| 2300078 | Remote file not found. |
| 2300094 | An authentication function returned an error. |
| 2300999 | Unknown Other Error. |
>**错误码说明:**
>HTTP 错误码映射关系:2300000 + curl错误码。更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)。
**示例:**
```js
httpResponseCache.delete().then(() => {
console.log('delete success');
}).catch(err => {
console.log('delete fail');
});
```
## HttpDataType<sup>9+</sup>
http的数据类型。
**系统能力**:SystemCapability.Communication.NetStack
| 名称 | 值 | 说明 |
| ------------------ | -- | ----------- |
| STRING | 0 | 字符串类型。 |
| OBJECT | 1 | 对象类型。 |
| ARRAY_BUFFER | 2 | 二进制数组类型。|
## HttpProtocol<sup>9+</sup>
http协议版本。
**系统能力**:SystemCapability.Communication.NetStack
| 名称 | 说明 |
| :-------- | :----------- |
| HTTP1_1 | 协议http1.1 |
| HTTP2 | 协议http2 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol. |
| 2300003 | URL using bad/illegal format or missing URL. |
| 2300005 | Couldn't resolve proxy name. |
| 2300006 | Couldn't resolve host name. |
| 2300007 | Couldn't connect to server. |
| 2300008 | Weird server reply. |
| 2300009 | Access denied to remote resource. |
| 2300016 | Error in the HTTP2 framing layer. |
| 2300018 | Transferred a partial file. |
| 2300023 | Failed writing received data to disk/application. |
| 2300025 | Upload failed. |
| 2300026 | Failed to open/read local data from file/application. |
| 2300027 | Out of memory. |
| 2300028 | Timeout was reached. |
| 2300047 | Number of redirects hit maximum amount. |
| 2300052 | Server returned nothing (no headers, no data). |
| 2300055 | Failed sending data to the peer. |
| 2300056 | Failure when receiving data from the peer. |
| 2300058 | Problem with the local SSL certificate. |
| 2300059 | Couldn't use specified SSL cipher. |
| 2300060 | SSL peer certificate or SSH remote key was not OK. |
| 2300061 | Unrecognized or bad HTTP Content or Transfer-Encoding.|
| 2300063 | Maximum file size exceeded. |
| 2300070 | Disk full or allocation exceeded. |
| 2300073 | Remote file already exists. |
| 2300077 | Problem with the SSL CA cert (path? access rights?). |
| 2300078 | Remote file not found. |
| 2300094 | An authentication function returned an error. |
| 2300999 | Unknown Other Error. |
# @ohos.net.http (数据请求)
本模块提供HTTP数据请求能力。应用可以通过HTTP发起一个数据请求,支持常见的GET、POST、OPTIONS、HEAD、PUT、DELETE、TRACE、CONNECT方法。
>**说明:**
>
>本模块首批接口从API version 6开始支持。后续版本的新增接口,采用上角标单独标记接口的起始版本。
>
## 导入模块
```js
import http from '@ohos.net.http';
```
## 完整示例
```js
import http from '@ohos.net.http';
// 每一个httpRequest对应一个HTTP请求任务,不可复用
let httpRequest = http.createHttp();
// 用于订阅HTTP响应头,此接口会比request请求先返回。可以根据业务需要订阅此消息
// 从API 8开始,使用on('headersReceive', Callback)替代on('headerReceive', AsyncCallback)。 8+
httpRequest.on('headersReceive', (header) => {
console.info('header: ' + JSON.stringify(header));
});
httpRequest.request(
// 填写HTTP请求的URL地址,可以带参数也可以不带参数。URL地址需要开发者自定义。请求的参数可以在extraData中指定
"EXAMPLE_URL",
{
method: http.RequestMethod.POST, // 可选,默认为http.RequestMethod.GET
// 开发者根据自身业务需要添加header字段
header: {
'Content-Type': 'application/json'
},
// 当使用POST请求时此字段用于传递内容
extraData: {
"data": "data to send",
},
expectDataType: http.HttpDataType.STRING, // 可选,指定返回数据的类型
usingCache: true, // 可选,默认为true
priority: 1, // 可选,默认为1
connectTimeout: 60000, // 可选,默认为60000ms
readTimeout: 60000, // 可选,默认为60000ms
usingProtocol: http.HttpProtocol.HTTP1_1, // 可选,协议类型默认值由系统自动指定
}, (err, data) => {
if (!err) {
// data.result为HTTP响应内容,可根据业务需要进行解析
console.info('Result:' + data.result);
console.info('code:' + data.responseCode);
// data.header为HTTP响应头,可根据业务需要进行解析
console.info('header:' + JSON.stringify(data.header));
console.info('cookies:' + data.cookies); // 8+
} else {
console.info('error:' + JSON.stringify(err));
// 当该请求使用完毕时,调用destroy方法主动销毁。
httpRequest.destroy();
}
}
);
```
## http.createHttp
createHttp\(\): HttpRequest
创建一个HTTP请求,里面包括发起请求、中断请求、订阅/取消订阅HTTP Response Header事件。每一个HttpRequest对象对应一个HTTP请求。如需发起多个HTTP请求,须为每个HTTP请求创建对应HttpRequest对象。
**系统能力**:SystemCapability.Communication.NetStack
**返回值:**
| 类型 | 说明 |
| :---------- | :----------------------------------------------------------- |
| HttpRequest | 返回一个HttpRequest对象,里面包括request、destroy、on和off方法。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 2300999 | Unknown Other Error. |
>**错误码说明:**
>HTTP 错误码映射关系:2300000 + curl错误码。更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)。
**示例:**
```js
import http from '@ohos.net.http';
let httpRequest = http.createHttp();
```
## HttpRequest
HTTP请求任务。在调用HttpRequest的方法前,需要先通过[createHttp\(\)](#httpcreatehttp)创建一个任务。
### request
request\(url: string, callback: AsyncCallback\<HttpResponse\>\):void
根据URL地址,发起HTTP网络请求,使用callback方式作为异步方法。
**需要权限**:ohos.permission.INTERNET
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | ---------------------------------------------- | ---- | ----------------------- |
| url | string | 是 | 发起网络请求的URL地址。 |
| callback | AsyncCallback\<[HttpResponse](#httpresponse)\> | 是 | 回调函数。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300003 | URL using bad/illegal format or missing URL. |
| 2300007 | Couldn't connect to server. |
| 2300028 | Timeout was reached. |
| 2300052 | Server returned nothing (no headers, no data). |
| 2300999 | Unknown Other Error. |
>**错误码说明:**
>HTTP 错误码映射关系:2300000 + curl错误码。更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)。
**示例:**
```js
httpRequest.request("EXAMPLE_URL", (err, data) => {
if (!err) {
console.info('Result:' + data.result);
console.info('code:' + data.responseCode);
console.info('header:' + JSON.stringify(data.header));
console.info('cookies:' + data.cookies); // 8+
} else {
console.info('error:' + JSON.stringify(err));
}
});
```
### request
request\(url: string, options: HttpRequestOptions, callback: AsyncCallback<HttpResponse\>\):void
根据URL地址和相关配置项,发起HTTP网络请求,使用callback方式作为异步方法。
**需要权限**:ohos.permission.INTERNET
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | ---------------------------------------------- | ---- | ----------------------------------------------- |
| url | string | 是 | 发起网络请求的URL地址。 |
| options | HttpRequestOptions | 是 | 参考[HttpRequestOptions](#httprequestoptions)。 |
| callback | AsyncCallback\<[HttpResponse](#httpresponse)\> | 是 | 回调函数。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol. |
| 2300003 | URL using bad/illegal format or missing URL. |
| 2300005 | Couldn't resolve proxy name. |
| 2300006 | Couldn't resolve host name. |
| 2300007 | Couldn't connect to server. |
| 2300008 | Weird server reply. |
| 2300009 | Access denied to remote resource. |
| 2300016 | Error in the HTTP2 framing layer. |
| 2300018 | Transferred a partial file. |
| 2300023 | Failed writing received data to disk/application. |
| 2300025 | Upload failed. |
| 2300026 | Failed to open/read local data from file/application. |
| 2300027 | Out of memory. |
| 2300028 | Timeout was reached. |
| 2300047 | Number of redirects hit maximum amount. |
| 2300052 | Server returned nothing (no headers, no data). |
| 2300055 | Failed sending data to the peer. |
| 2300056 | Failure when receiving data from the peer. |
| 2300058 | Problem with the local SSL certificate. |
| 2300059 | Couldn't use specified SSL cipher. |
| 2300060 | SSL peer certificate or SSH remote key was not OK. |
| 2300061 | Unrecognized or bad HTTP Content or Transfer-Encoding.|
| 2300063 | Maximum file size exceeded. |
| 2300070 | Disk full or allocation exceeded. |
| 2300073 | Remote file already exists. |
| 2300077 | Problem with the SSL CA cert (path? access rights?). |
| 2300078 | Remote file not found. |
| 2300094 | An authentication function returned an error. |
| 2300999 | Unknown Other Error. |
>**错误码说明:**
>HTTP 错误码映射关系:2300000 + curl错误码。更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)。
**示例:**
```js
httpRequest.request("EXAMPLE_URL",
{
method: http.RequestMethod.GET,
header: {
'Content-Type': 'application/json'
},
readTimeout: 60000,
connectTimeout: 60000
}, (err, data) => {
if (!err) {
console.info('Result:' + data.result);
console.info('code:' + data.responseCode);
console.info('header:' + JSON.stringify(data.header));
console.info('cookies:' + data.cookies); // 8+
console.info('header.Content-Type:' + data.header['Content-Type']);
console.info('header.Status-Line:' + data.header['Status-Line']);
} else {
console.info('error:' + JSON.stringify(err));
}
});
```
### request
request\(url: string, options? : HttpRequestOptions\): Promise<HttpResponse\>
根据URL地址,发起HTTP网络请求,使用Promise方式作为异步方法。
**需要权限**:ohos.permission.INTERNET
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| ------- | ------------------ | ---- | ----------------------------------------------- |
| url | string | 是 | 发起网络请求的URL地址。 |
| options | HttpRequestOptions | 否 | 参考[HttpRequestOptions](#httprequestoptions)。 |
**返回值:**
| 类型 | 说明 |
| :------------------------------------- | :-------------------------------- |
| Promise<[HttpResponse](#httpresponse)> | 以Promise形式返回发起请求的结果。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol. |
| 2300003 | URL using bad/illegal format or missing URL. |
| 2300005 | Couldn't resolve proxy name. |
| 2300006 | Couldn't resolve host name. |
| 2300007 | Couldn't connect to server. |
| 2300008 | Weird server reply. |
| 2300009 | Access denied to remote resource. |
| 2300016 | Error in the HTTP2 framing layer. |
| 2300018 | Transferred a partial file. |
| 2300023 | Failed writing received data to disk/application. |
| 2300025 | Upload failed. |
| 2300026 | Failed to open/read local data from file/application. |
| 2300027 | Out of memory. |
| 2300028 | Timeout was reached. |
| 2300047 | Number of redirects hit maximum amount. |
| 2300052 | Server returned nothing (no headers, no data). |
| 2300055 | Failed sending data to the peer. |
| 2300056 | Failure when receiving data from the peer. |
| 2300058 | Problem with the local SSL certificate. |
| 2300059 | Couldn't use specified SSL cipher. |
| 2300060 | SSL peer certificate or SSH remote key was not OK. |
| 2300061 | Unrecognized or bad HTTP Content or Transfer-Encoding.|
| 2300063 | Maximum file size exceeded. |
| 2300070 | Disk full or allocation exceeded. |
| 2300073 | Remote file already exists. |
| 2300077 | Problem with the SSL CA cert (path? access rights?). |
| 2300078 | Remote file not found. |
| 2300094 | An authentication function returned an error. |
| 2300999 | Unknown Other Error. |
>**错误码说明:**
>HTTP 错误码映射关系:2300000 + curl错误码。更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)。
**示例:**
```js
let promise = httpRequest.request("EXAMPLE_URL", {
method: http.RequestMethod.GET,
connectTimeout: 60000,
readTimeout: 60000,
header: {
'Content-Type': 'application/json'
}
});
promise.then((data) => {
console.info('Result:' + data.result);
console.info('code:' + data.responseCode);
console.info('header:' + JSON.stringify(data.header));
console.info('cookies:' + data.cookies); // 8+
console.info('header.Content-Type:' + data.header['Content-Type']);
console.info('header.Status-Line:' + data.header['Status-Line']);
}).catch((err) => {
console.info('error:' + JSON.stringify(err));
});
```
### destroy
destroy\(\): void
中断请求任务。
**系统能力**:SystemCapability.Communication.NetStack
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 2300999 | Unknown Other Error. |
>**错误码说明:**
>HTTP 错误码映射关系:2300000 + curl错误码。更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)。
**示例:**
```js
httpRequest.destroy();
```
### on\('headerReceive'\)
on\(type: 'headerReceive', callback: AsyncCallback<Object\>\): void
订阅HTTP Response Header 事件。
>![](public_sys-resources/icon-note.gif) **说明:**
>此接口已废弃,建议使用[on\('headersReceive'\)<sup>8+</sup>](#onheadersreceive8)替代。
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | ----------------------- | ---- | --------------------------------- |
| type | string | 是 | 订阅的事件类型,'headerReceive'。 |
| callback | AsyncCallback\<Object\> | 是 | 回调函数。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300999 | Unknown Other Error. |
>**错误码说明:**
>HTTP 错误码映射关系:2300000 + curl错误码。更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)。
**示例:**
```js
httpRequest.on('headerReceive', (err, data) => {
if (!err) {
console.info('header: ' + JSON.stringify(data));
} else {
console.info('error:' + JSON.stringify(err));
}
});
```
### off\('headerReceive'\)
off\(type: 'headerReceive', callback?: AsyncCallback<Object\>\): void
取消订阅HTTP Response Header 事件。
>![](public_sys-resources/icon-note.gif) **说明:**
>
>1. 此接口已废弃,建议使用[off\('headersReceive'\)<sup>8+</sup>](#offheadersreceive8)替代。
>
>2. 可以指定传入on中的callback取消一个订阅,也可以不指定callback清空所有订阅。
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | ----------------------- | ---- | ------------------------------------- |
| type | string | 是 | 取消订阅的事件类型,'headerReceive'。 |
| callback | AsyncCallback\<Object\> | 否 | 回调函数。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300999 | Unknown Other Error. |
>**错误码说明:**
>HTTP 错误码映射关系:2300000 + curl错误码。更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)。
**示例:**
```js
httpRequest.off('headerReceive');
```
### on\('headersReceive'\)<sup>8+</sup>
on\(type: 'headersReceive', callback: Callback<Object\>\): void
订阅HTTP Response Header 事件。
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | ------------------ | ---- | ---------------------------------- |
| type | string | 是 | 订阅的事件类型:'headersReceive'。 |
| callback | Callback\<Object\> | 是 | 回调函数。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300999 | Unknown Other Error. |
>**错误码说明:**
>HTTP 错误码映射关系:2300000 + curl错误码。更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)。
**示例:**
```js
httpRequest.on('headersReceive', (header) => {
console.info('header: ' + JSON.stringify(header));
});
```
### off\('headersReceive'\)<sup>8+</sup>
off\(type: 'headersReceive', callback?: Callback<Object\>\): void
取消订阅HTTP Response Header 事件。
>![](public_sys-resources/icon-note.gif) **说明:**
>可以指定传入on中的callback取消一个订阅,也可以不指定callback清空所有订阅。
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | ------------------ | ---- | -------------------------------------- |
| type | string | 是 | 取消订阅的事件类型:'headersReceive'。 |
| callback | Callback\<Object\> | 否 | 回调函数。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300999 | Unknown Other Error. |
>**错误码说明:**
>HTTP 错误码映射关系:2300000 + curl错误码。更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)。
**示例:**
```js
httpRequest.off('headersReceive');
```
### once\('headersReceive'\)<sup>8+</sup>
once\(type: 'headersReceive', callback: Callback<Object\>\): void
订阅HTTP Response Header 事件,但是只触发一次。一旦触发之后,订阅器就会被移除。使用callback方式作为异步方法。
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | ------------------ | ---- | ---------------------------------- |
| type | string | 是 | 订阅的事件类型:'headersReceive'。 |
| callback | Callback\<Object\> | 是 | 回调函数。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300999 | Unknown Other Error. |
>**错误码说明:**
>HTTP 错误码映射关系:2300000 + curl错误码。更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)。
**示例:**
```js
httpRequest.once('headersReceive', (header) => {
console.info('header: ' + JSON.stringify(header));
});
```
## HttpRequestOptions
发起请求可选参数的类型和取值范围。
**系统能力**:以下各项对应的系统能力均为SystemCapability.Communication.NetStack。
| 名称 | 类型 | 必填 | 说明 |
| -------------- | --------------------------------------------- | ---- | ------------------------------------------------------------ |
| method | [RequestMethod](#requestmethod) | 否 | 请求方式。 |
| extraData | string \| Object \| ArrayBuffer<sup>6+</sup> | 否 | 发送请求的额外数据。<br />- 当HTTP请求为POST、PUT等方法时,此字段为HTTP请求的content。<br />- 当HTTP请求为GET、OPTIONS、DELETE、TRACE、CONNECT等方法时,此字段为HTTP请求的参数补充,参数内容会拼接到URL中进行发送。<sup>6+</sup><br />- 开发者传入string对象,开发者需要自行编码,将编码后的string传入。<sup>6+</sup> |
| expectDataType<sup>9+</sup> | [HttpDataType](#httpdatatype9) | 否 | 指定返回数据的类型。如果设置了此参数,系统将优先返回指定的类型。 |
| usingCache<sup>9+</sup> | boolean | 否 | 是否使用缓存,默认为true。 |
| priority<sup>9+</sup> | number | 否 | 优先级,范围\[1,1000],默认是1。 |
| header | Object | 否 | HTTP请求头字段。默认{'Content-Type': 'application/json'}。 |
| readTimeout | number | 否 | 读取超时时间。单位为毫秒(ms),默认为60000ms。 |
| connectTimeout | number | 否 | 连接超时时间。单位为毫秒(ms),默认为60000ms。 |
| usingProtocol<sup>9+</sup> | [HttpProtocol](#httpprotocol9) | 否 | 使用协议。默认值由系统自动指定。 |
## RequestMethod
HTTP 请求方法。
**系统能力**:以下各项对应的系统能力均为SystemCapability.Communication.NetStack。
| 名称 | 值 | 说明 |
| :------ | ------- | :------------------ |
| OPTIONS | "OPTIONS" | HTTP 请求 OPTIONS。 |
| GET | "GET" | HTTP 请求 GET。 |
| HEAD | "HEAD" | HTTP 请求 HEAD。 |
| POST | "POST" | HTTP 请求 POST。 |
| PUT | "PUT" | HTTP 请求 PUT。 |
| DELETE | "DELETE" | HTTP 请求 DELETE。 |
| TRACE | "TRACE" | HTTP 请求 TRACE。 |
| CONNECT | "CONNECT" | HTTP 请求 CONNECT。 |
## ResponseCode
发起请求返回的响应码。
**系统能力**:以下各项对应的系统能力均为SystemCapability.Communication.NetStack。
| 名称 | 值 | 说明 |
| ----------------- | ---- | ------------------------------------------------------------ |
| OK | 200 | 请求成功。一般用于GET与POST请求。 |
| CREATED | 201 | 已创建。成功请求并创建了新的资源。 |
| ACCEPTED | 202 | 已接受。已经接受请求,但未处理完成。 |
| NOT_AUTHORITATIVE | 203 | 非授权信息。请求成功。 |
| NO_CONTENT | 204 | 无内容。服务器成功处理,但未返回内容。 |
| RESET | 205 | 重置内容。 |
| PARTIAL | 206 | 部分内容。服务器成功处理了部分GET请求。 |
| MULT_CHOICE | 300 | 多种选择。 |
| MOVED_PERM | 301 | 永久移动。请求的资源已被永久的移动到新URI,返回信息会包括新的URI,浏览器会自动定向到新URI。 |
| MOVED_TEMP | 302 | 临时移动。 |
| SEE_OTHER | 303 | 查看其它地址。 |
| NOT_MODIFIED | 304 | 未修改。 |
| USE_PROXY | 305 | 使用代理。 |
| BAD_REQUEST | 400 | 客户端请求的语法错误,服务器无法理解。 |
| UNAUTHORIZED | 401 | 请求要求用户的身份认证。 |
| PAYMENT_REQUIRED | 402 | 保留,将来使用。 |
| FORBIDDEN | 403 | 服务器理解请求客户端的请求,但是拒绝执行此请求。 |
| NOT_FOUND | 404 | 服务器无法根据客户端的请求找到资源(网页)。 |
| BAD_METHOD | 405 | 客户端请求中的方法被禁止。 |
| NOT_ACCEPTABLE | 406 | 服务器无法根据客户端请求的内容特性完成请求。 |
| PROXY_AUTH | 407 | 请求要求代理的身份认证。 |
| CLIENT_TIMEOUT | 408 | 请求时间过长,超时。 |
| CONFLICT | 409 | 服务器完成客户端的PUT请求是可能返回此代码,服务器处理请求时发生了冲突。 |
| GONE | 410 | 客户端请求的资源已经不存在。 |
| LENGTH_REQUIRED | 411 | 服务器无法处理客户端发送的不带Content-Length的请求信息。 |
| PRECON_FAILED | 412 | 客户端请求信息的先决条件错误。 |
| ENTITY_TOO_LARGE | 413 | 由于请求的实体过大,服务器无法处理,因此拒绝请求。 |
| REQ_TOO_LONG | 414 | 请求的URI过长(URI通常为网址),服务器无法处理。 |
| UNSUPPORTED_TYPE | 415 | 服务器无法处理请求的格式。 |
| INTERNAL_ERROR | 500 | 服务器内部错误,无法完成请求。 |
| NOT_IMPLEMENTED | 501 | 服务器不支持请求的功能,无法完成请求。 |
| BAD_GATEWAY | 502 | 充当网关或代理的服务器,从远端服务器接收到了一个无效的请求。 |
| UNAVAILABLE | 503 | 由于超载或系统维护,服务器暂时的无法处理客户端的请求。 |
| GATEWAY_TIMEOUT | 504 | 充当网关或代理的服务器,未及时从远端服务器获取请求。 |
| VERSION | 505 | 服务器请求的HTTP协议的版本。 |
## HttpResponse
request方法回调函数的返回值类型。
**系统能力**:以下各项对应的系统能力均为SystemCapability.Communication.NetStack。
| 名称 | 类型 | 必填 | 说明 |
| -------------------- | -------------------------------------------- | ---- | ------------------------------------------------------------ |
| result | string \| Object \| ArrayBuffer<sup>6+</sup> | 是 | HTTP请求根据响应头中Content-type类型返回对应的响应格式内容:<br />- application/json:返回JSON格式的字符串,如需HTTP响应具体内容,需开发者自行解析<br />- application/octet-stream:ArrayBuffer<br />- 其他:string |
| resultType<sup>9+</sup> | [HttpDataType](#httpdatatype9) | 是 | 返回值类型。 |
| responseCode | [ResponseCode](#responsecode) \| number | 是 | 回调函数执行成功时,此字段为[ResponseCode](#responsecode)。若执行失败,错误码将会从AsyncCallback中的err字段返回。 |
| header | Object | 是 | 发起HTTP请求返回来的响应头。当前返回的是JSON格式字符串,如需具体字段内容,需开发者自行解析。常见字段及解析方式如下:<br/>- Content-Type:header['Content-Type'];<br />- Status-Line:header['Status-Line'];<br />- Date:header.Date/header['Date'];<br />- Server:header.Server/header['Server']; |
| cookies<sup>8+</sup> | Array\<string\> | 是 | 服务器返回的 cookies。 |
## http.createHttpResponseCache<sup>9+</sup>
createHttpResponseCache(cacheSize?: number): HttpResponseCache
创建一个默认的对象来存储HTTP访问请求的响应。
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | --------------------------------------- | ---- | ---------- |
| cacheSize | number | 否 | 缓存大小最大为10\*1024\*1024(10MB),默认最大。 |
**返回值:**
| 类型 | 说明 |
| :---------- | :----------------------------------------------------------- |
| [HttpResponseCache](#httpresponsecache9) | 返回一个存储HTTP访问请求响应的对象。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol. |
| 2300003 | URL using bad/illegal format or missing URL. |
| 2300005 | Couldn't resolve proxy name. |
| 2300006 | Couldn't resolve host name. |
| 2300007 | Couldn't connect to server. |
| 2300008 | Weird server reply. |
| 2300009 | Access denied to remote resource. |
| 2300016 | Error in the HTTP2 framing layer. |
| 2300018 | Transferred a partial file. |
| 2300023 | Failed writing received data to disk/application. |
| 2300025 | Upload failed. |
| 2300026 | Failed to open/read local data from file/application. |
| 2300027 | Out of memory. |
| 2300028 | Timeout was reached. |
| 2300047 | Number of redirects hit maximum amount. |
| 2300052 | Server returned nothing (no headers, no data). |
| 2300055 | Failed sending data to the peer. |
| 2300056 | Failure when receiving data from the peer. |
| 2300058 | Problem with the local SSL certificate. |
| 2300059 | Couldn't use specified SSL cipher. |
| 2300060 | SSL peer certificate or SSH remote key was not OK. |
| 2300061 | Unrecognized or bad HTTP Content or Transfer-Encoding.|
| 2300063 | Maximum file size exceeded. |
| 2300070 | Disk full or allocation exceeded. |
| 2300073 | Remote file already exists. |
| 2300077 | Problem with the SSL CA cert (path? access rights?). |
| 2300078 | Remote file not found. |
| 2300094 | An authentication function returned an error. |
| 2300999 | Unknown Other Error. |
>**错误码说明:**
>HTTP 错误码映射关系:2300000 + curl错误码。更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)。
**示例:**
```js
import http from '@ohos.net.http';
let httpResponseCache = http.createHttpResponseCache();
```
## HttpResponseCache<sup>9+</sup>
存储HTTP访问请求响应的对象。
### flush<sup>9+</sup>
flush(callback: AsyncCallback\<void>): void
将缓存中的数据写入文件系统,以便在下一个HTTP请求中访问所有缓存数据,使用callback方式作为异步方法。
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | --------------------------------------- | ---- | ---------- |
| callback | AsyncCallback\<void> | 是 | 回调函数返回写入结果。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol. |
| 2300003 | URL using bad/illegal format or missing URL. |
| 2300005 | Couldn't resolve proxy name. |
| 2300006 | Couldn't resolve host name. |
| 2300007 | Couldn't connect to server. |
| 2300008 | Weird server reply. |
| 2300009 | Access denied to remote resource. |
| 2300016 | Error in the HTTP2 framing layer. |
| 2300018 | Transferred a partial file. |
| 2300023 | Failed writing received data to disk/application. |
| 2300025 | Upload failed. |
| 2300026 | Failed to open/read local data from file/application. |
| 2300027 | Out of memory. |
| 2300028 | Timeout was reached. |
| 2300047 | Number of redirects hit maximum amount. |
| 2300052 | Server returned nothing (no headers, no data). |
| 2300055 | Failed sending data to the peer. |
| 2300056 | Failure when receiving data from the peer. |
| 2300058 | Problem with the local SSL certificate. |
| 2300059 | Couldn't use specified SSL cipher. |
| 2300060 | SSL peer certificate or SSH remote key was not OK. |
| 2300061 | Unrecognized or bad HTTP Content or Transfer-Encoding.|
| 2300063 | Maximum file size exceeded. |
| 2300070 | Disk full or allocation exceeded. |
| 2300073 | Remote file already exists. |
| 2300077 | Problem with the SSL CA cert (path? access rights?). |
| 2300078 | Remote file not found. |
| 2300094 | An authentication function returned an error. |
| 2300999 | Unknown Other Error. |
>**错误码说明:**
>HTTP 错误码映射关系:2300000 + curl错误码。更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)。
**示例:**
```js
httpResponseCache.flush().then(() => {
console.log('flush success');
}).catch(err => {
console.log('flush fail');
});
```
### delete<sup>9+</sup>
delete(callback: AsyncCallback\<void>): void
禁用缓存并删除其中的数据,使用callback方式作为异步方法。
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | --------------------------------------- | ---- | ---------- |
| callback | AsyncCallback\<void> | 是 | 回调函数返回删除结果。|
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol. |
| 2300003 | URL using bad/illegal format or missing URL. |
| 2300005 | Couldn't resolve proxy name. |
| 2300006 | Couldn't resolve host name. |
| 2300007 | Couldn't connect to server. |
| 2300008 | Weird server reply. |
| 2300009 | Access denied to remote resource. |
| 2300016 | Error in the HTTP2 framing layer. |
| 2300018 | Transferred a partial file. |
| 2300023 | Failed writing received data to disk/application. |
| 2300025 | Upload failed. |
| 2300026 | Failed to open/read local data from file/application. |
| 2300027 | Out of memory. |
| 2300028 | Timeout was reached. |
| 2300047 | Number of redirects hit maximum amount. |
| 2300052 | Server returned nothing (no headers, no data). |
| 2300055 | Failed sending data to the peer. |
| 2300056 | Failure when receiving data from the peer. |
| 2300058 | Problem with the local SSL certificate. |
| 2300059 | Couldn't use specified SSL cipher. |
| 2300060 | SSL peer certificate or SSH remote key was not OK. |
| 2300061 | Unrecognized or bad HTTP Content or Transfer-Encoding.|
| 2300063 | Maximum file size exceeded. |
| 2300070 | Disk full or allocation exceeded. |
| 2300073 | Remote file already exists. |
| 2300077 | Problem with the SSL CA cert (path? access rights?). |
| 2300078 | Remote file not found. |
| 2300094 | An authentication function returned an error. |
| 2300999 | Unknown Other Error. |
>**错误码说明:**
>HTTP 错误码映射关系:2300000 + curl错误码。更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)。
**示例:**
```js
httpResponseCache.delete(err => {
if (err) {
console.log('delete fail');
return;
}
console.log('delete success');
});
```
### delete<sup>9+</sup>
delete(): Promise\<void>
禁用缓存并删除其中的数据,使用Promise方式作为异步方法。
**系统能力**:SystemCapability.Communication.NetStack
**返回值:**
| 类型 | 说明 |
| --------------------------------- | ------------------------------------- |
| Promise\<void> | 以Promise形式返回删除结果。 |
**错误码:**
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol. |
| 2300003 | URL using bad/illegal format or missing URL. |
| 2300005 | Couldn't resolve proxy name. |
| 2300006 | Couldn't resolve host name. |
| 2300007 | Couldn't connect to server. |
| 2300008 | Weird server reply. |
| 2300009 | Access denied to remote resource. |
| 2300016 | Error in the HTTP2 framing layer. |
| 2300018 | Transferred a partial file. |
| 2300023 | Failed writing received data to disk/application. |
| 2300025 | Upload failed. |
| 2300026 | Failed to open/read local data from file/application. |
| 2300027 | Out of memory. |
| 2300028 | Timeout was reached. |
| 2300047 | Number of redirects hit maximum amount. |
| 2300052 | Server returned nothing (no headers, no data). |
| 2300055 | Failed sending data to the peer. |
| 2300056 | Failure when receiving data from the peer. |
| 2300058 | Problem with the local SSL certificate. |
| 2300059 | Couldn't use specified SSL cipher. |
| 2300060 | SSL peer certificate or SSH remote key was not OK. |
| 2300061 | Unrecognized or bad HTTP Content or Transfer-Encoding.|
| 2300063 | Maximum file size exceeded. |
| 2300070 | Disk full or allocation exceeded. |
| 2300073 | Remote file already exists. |
| 2300077 | Problem with the SSL CA cert (path? access rights?). |
| 2300078 | Remote file not found. |
| 2300094 | An authentication function returned an error. |
| 2300999 | Unknown Other Error. |
>**错误码说明:**
>HTTP 错误码映射关系:2300000 + curl错误码。更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)。
**示例:**
```js
httpResponseCache.delete().then(() => {
console.log('delete success');
}).catch(err => {
console.log('delete fail');
});
```
## HttpDataType<sup>9+</sup>
http的数据类型。
**系统能力**:SystemCapability.Communication.NetStack
| 名称 | 值 | 说明 |
| ------------------ | -- | ----------- |
| STRING | 0 | 字符串类型。 |
| OBJECT | 1 | 对象类型。 |
| ARRAY_BUFFER | 2 | 二进制数组类型。|
## HttpProtocol<sup>9+</sup>
http协议版本。
**系统能力**:SystemCapability.Communication.NetStack
| 名称 | 说明 |
| :-------- | :----------- |
| HTTP1_1 | 协议http1.1 |
| HTTP2 | 协议http2 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol. |
| 2300003 | URL using bad/illegal format or missing URL. |
| 2300005 | Couldn't resolve proxy name. |
| 2300006 | Couldn't resolve host name. |
| 2300007 | Couldn't connect to server. |
| 2300008 | Weird server reply. |
| 2300009 | Access denied to remote resource. |
| 2300016 | Error in the HTTP2 framing layer. |
| 2300018 | Transferred a partial file. |
| 2300023 | Failed writing received data to disk/application. |
| 2300025 | Upload failed. |
| 2300026 | Failed to open/read local data from file/application. |
| 2300027 | Out of memory. |
| 2300028 | Timeout was reached. |
| 2300047 | Number of redirects hit maximum amount. |
| 2300052 | Server returned nothing (no headers, no data). |
| 2300055 | Failed sending data to the peer. |
| 2300056 | Failure when receiving data from the peer. |
| 2300058 | Problem with the local SSL certificate. |
| 2300059 | Couldn't use specified SSL cipher. |
| 2300060 | SSL peer certificate or SSH remote key was not OK. |
| 2300061 | Unrecognized or bad HTTP Content or Transfer-Encoding.|
| 2300063 | Maximum file size exceeded. |
| 2300070 | Disk full or allocation exceeded. |
| 2300073 | Remote file already exists. |
| 2300077 | Problem with the SSL CA cert (path? access rights?). |
| 2300078 | Remote file not found. |
| 2300094 | An authentication function returned an error. |
| 2300999 | Unknown Other Error. |
# @ohos.net.http (数据请求)
本模块提供HTTP数据请求能力。应用可以通过HTTP发起一个数据请求,支持常见的GET、POST、OPTIONS、HEAD、PUT、DELETE、TRACE、CONNECT方法。
>**说明:**
>
>本模块首批接口从API version 6开始支持。后续版本的新增接口,采用上角标单独标记接口的起始版本。
>
## 导入模块
```js
import http from '@ohos.net.http';
```
## 完整示例
```js
import http from '@ohos.net.http';
// 每一个httpRequest对应一个HTTP请求任务,不可复用
let httpRequest = http.createHttp();
// 用于订阅HTTP响应头,此接口会比request请求先返回。可以根据业务需要订阅此消息
// 从API 8开始,使用on('headersReceive', Callback)替代on('headerReceive', AsyncCallback)。 8+
httpRequest.on('headersReceive', (header) => {
console.info('header: ' + JSON.stringify(header));
});
httpRequest.request(
// 填写HTTP请求的URL地址,可以带参数也可以不带参数。URL地址需要开发者自定义。请求的参数可以在extraData中指定
"EXAMPLE_URL",
{
method: http.RequestMethod.POST, // 可选,默认为http.RequestMethod.GET
// 开发者根据自身业务需要添加header字段
header: {
'Content-Type': 'application/json'
},
// 当使用POST请求时此字段用于传递内容
extraData: {
"data": "data to send",
},
expectDataType: http.HttpDataType.STRING, // 可选,指定返回数据的类型
usingCache: true, // 可选,默认为true
priority: 1, // 可选,默认为1
connectTimeout: 60000, // 可选,默认为60000ms
readTimeout: 60000, // 可选,默认为60000ms
usingProtocol: http.HttpProtocol.HTTP1_1, // 可选,协议类型默认值由系统自动指定
}, (err, data) => {
if (!err) {
// data.result为HTTP响应内容,可根据业务需要进行解析
console.info('Result:' + data.result);
console.info('code:' + data.responseCode);
// data.header为HTTP响应头,可根据业务需要进行解析
console.info('header:' + JSON.stringify(data.header));
console.info('cookies:' + data.cookies); // 8+
} else {
console.info('error:' + JSON.stringify(err));
// 当该请求使用完毕时,调用destroy方法主动销毁。
httpRequest.destroy();
}
}
);
```
## http.createHttp
createHttp\(\): HttpRequest
创建一个HTTP请求,里面包括发起请求、中断请求、订阅/取消订阅HTTP Response Header事件。每一个HttpRequest对象对应一个HTTP请求。如需发起多个HTTP请求,须为每个HTTP请求创建对应HttpRequest对象。
**系统能力**:SystemCapability.Communication.NetStack
**返回值:**
| 类型 | 说明 |
| :---------- | :----------------------------------------------------------- |
| HttpRequest | 返回一个HttpRequest对象,里面包括request、destroy、on和off方法。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 2300999 | Unknown Other Error. |
>**错误码说明:**
>HTTP 错误码映射关系:2300000 + curl错误码。更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)。
**示例:**
```js
import http from '@ohos.net.http';
let httpRequest = http.createHttp();
```
## HttpRequest
HTTP请求任务。在调用HttpRequest的方法前,需要先通过[createHttp\(\)](#httpcreatehttp)创建一个任务。
### request
request\(url: string, callback: AsyncCallback\<HttpResponse\>\):void
根据URL地址,发起HTTP网络请求,使用callback方式作为异步方法。
**需要权限**:ohos.permission.INTERNET
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | ---------------------------------------------- | ---- | ----------------------- |
| url | string | 是 | 发起网络请求的URL地址。 |
| callback | AsyncCallback\<[HttpResponse](#httpresponse)\> | 是 | 回调函数。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300003 | URL using bad/illegal format or missing URL. |
| 2300007 | Couldn't connect to server. |
| 2300028 | Timeout was reached. |
| 2300052 | Server returned nothing (no headers, no data). |
| 2300999 | Unknown Other Error. |
>**错误码说明:**
>HTTP 错误码映射关系:2300000 + curl错误码。更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)。
**示例:**
```js
httpRequest.request("EXAMPLE_URL", (err, data) => {
if (!err) {
console.info('Result:' + data.result);
console.info('code:' + data.responseCode);
console.info('header:' + JSON.stringify(data.header));
console.info('cookies:' + data.cookies); // 8+
} else {
console.info('error:' + JSON.stringify(err));
}
});
```
### request
request\(url: string, options: HttpRequestOptions, callback: AsyncCallback<HttpResponse\>\):void
根据URL地址和相关配置项,发起HTTP网络请求,使用callback方式作为异步方法。
**需要权限**:ohos.permission.INTERNET
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | ---------------------------------------------- | ---- | ----------------------------------------------- |
| url | string | 是 | 发起网络请求的URL地址。 |
| options | HttpRequestOptions | 是 | 参考[HttpRequestOptions](#httprequestoptions)。 |
| callback | AsyncCallback\<[HttpResponse](#httpresponse)\> | 是 | 回调函数。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol. |
| 2300003 | URL using bad/illegal format or missing URL. |
| 2300005 | Couldn't resolve proxy name. |
| 2300006 | Couldn't resolve host name. |
| 2300007 | Couldn't connect to server. |
| 2300008 | Weird server reply. |
| 2300009 | Access denied to remote resource. |
| 2300016 | Error in the HTTP2 framing layer. |
| 2300018 | Transferred a partial file. |
| 2300023 | Failed writing received data to disk/application. |
| 2300025 | Upload failed. |
| 2300026 | Failed to open/read local data from file/application. |
| 2300027 | Out of memory. |
| 2300028 | Timeout was reached. |
| 2300047 | Number of redirects hit maximum amount. |
| 2300052 | Server returned nothing (no headers, no data). |
| 2300055 | Failed sending data to the peer. |
| 2300056 | Failure when receiving data from the peer. |
| 2300058 | Problem with the local SSL certificate. |
| 2300059 | Couldn't use specified SSL cipher. |
| 2300060 | SSL peer certificate or SSH remote key was not OK. |
| 2300061 | Unrecognized or bad HTTP Content or Transfer-Encoding.|
| 2300063 | Maximum file size exceeded. |
| 2300070 | Disk full or allocation exceeded. |
| 2300073 | Remote file already exists. |
| 2300077 | Problem with the SSL CA cert (path? access rights?). |
| 2300078 | Remote file not found. |
| 2300094 | An authentication function returned an error. |
| 2300999 | Unknown Other Error. |
>**错误码说明:**
>HTTP 错误码映射关系:2300000 + curl错误码。更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)。
**示例:**
```js
httpRequest.request("EXAMPLE_URL",
{
method: http.RequestMethod.GET,
header: {
'Content-Type': 'application/json'
},
readTimeout: 60000,
connectTimeout: 60000
}, (err, data) => {
if (!err) {
console.info('Result:' + data.result);
console.info('code:' + data.responseCode);
console.info('header:' + JSON.stringify(data.header));
console.info('cookies:' + data.cookies); // 8+
console.info('header.Content-Type:' + data.header['Content-Type']);
console.info('header.Status-Line:' + data.header['Status-Line']);
} else {
console.info('error:' + JSON.stringify(err));
}
});
```
### request
request\(url: string, options? : HttpRequestOptions\): Promise<HttpResponse\>
根据URL地址,发起HTTP网络请求,使用Promise方式作为异步方法。
**需要权限**:ohos.permission.INTERNET
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| ------- | ------------------ | ---- | ----------------------------------------------- |
| url | string | 是 | 发起网络请求的URL地址。 |
| options | HttpRequestOptions | 否 | 参考[HttpRequestOptions](#httprequestoptions)。 |
**返回值:**
| 类型 | 说明 |
| :------------------------------------- | :-------------------------------- |
| Promise<[HttpResponse](#httpresponse)> | 以Promise形式返回发起请求的结果。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol. |
| 2300003 | URL using bad/illegal format or missing URL. |
| 2300005 | Couldn't resolve proxy name. |
| 2300006 | Couldn't resolve host name. |
| 2300007 | Couldn't connect to server. |
| 2300008 | Weird server reply. |
| 2300009 | Access denied to remote resource. |
| 2300016 | Error in the HTTP2 framing layer. |
| 2300018 | Transferred a partial file. |
| 2300023 | Failed writing received data to disk/application. |
| 2300025 | Upload failed. |
| 2300026 | Failed to open/read local data from file/application. |
| 2300027 | Out of memory. |
| 2300028 | Timeout was reached. |
| 2300047 | Number of redirects hit maximum amount. |
| 2300052 | Server returned nothing (no headers, no data). |
| 2300055 | Failed sending data to the peer. |
| 2300056 | Failure when receiving data from the peer. |
| 2300058 | Problem with the local SSL certificate. |
| 2300059 | Couldn't use specified SSL cipher. |
| 2300060 | SSL peer certificate or SSH remote key was not OK. |
| 2300061 | Unrecognized or bad HTTP Content or Transfer-Encoding.|
| 2300063 | Maximum file size exceeded. |
| 2300070 | Disk full or allocation exceeded. |
| 2300073 | Remote file already exists. |
| 2300077 | Problem with the SSL CA cert (path? access rights?). |
| 2300078 | Remote file not found. |
| 2300094 | An authentication function returned an error. |
| 2300999 | Unknown Other Error. |
>**错误码说明:**
>HTTP 错误码映射关系:2300000 + curl错误码。更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)。
**示例:**
```js
let promise = httpRequest.request("EXAMPLE_URL", {
method: http.RequestMethod.GET,
connectTimeout: 60000,
readTimeout: 60000,
header: {
'Content-Type': 'application/json'
}
});
promise.then((data) => {
console.info('Result:' + data.result);
console.info('code:' + data.responseCode);
console.info('header:' + JSON.stringify(data.header));
console.info('cookies:' + data.cookies); // 8+
console.info('header.Content-Type:' + data.header['Content-Type']);
console.info('header.Status-Line:' + data.header['Status-Line']);
}).catch((err) => {
console.info('error:' + JSON.stringify(err));
});
```
### destroy
destroy\(\): void
中断请求任务。
**系统能力**:SystemCapability.Communication.NetStack
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 2300999 | Unknown Other Error. |
>**错误码说明:**
>HTTP 错误码映射关系:2300000 + curl错误码。更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)。
**示例:**
```js
httpRequest.destroy();
```
### on\('headerReceive'\)
on\(type: 'headerReceive', callback: AsyncCallback<Object\>\): void
订阅HTTP Response Header 事件。
>![](public_sys-resources/icon-note.gif) **说明:**
>此接口已废弃,建议使用[on\('headersReceive'\)<sup>8+</sup>](#onheadersreceive8)替代。
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | ----------------------- | ---- | --------------------------------- |
| type | string | 是 | 订阅的事件类型,'headerReceive'。 |
| callback | AsyncCallback\<Object\> | 是 | 回调函数。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300999 | Unknown Other Error. |
>**错误码说明:**
>HTTP 错误码映射关系:2300000 + curl错误码。更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)。
**示例:**
```js
httpRequest.on('headerReceive', (err, data) => {
if (!err) {
console.info('header: ' + JSON.stringify(data));
} else {
console.info('error:' + JSON.stringify(err));
}
});
```
### off\('headerReceive'\)
off\(type: 'headerReceive', callback?: AsyncCallback<Object\>\): void
取消订阅HTTP Response Header 事件。
>![](public_sys-resources/icon-note.gif) **说明:**
>
>1. 此接口已废弃,建议使用[off\('headersReceive'\)<sup>8+</sup>](#offheadersreceive8)替代。
>
>2. 可以指定传入on中的callback取消一个订阅,也可以不指定callback清空所有订阅。
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | ----------------------- | ---- | ------------------------------------- |
| type | string | 是 | 取消订阅的事件类型,'headerReceive'。 |
| callback | AsyncCallback\<Object\> | 否 | 回调函数。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300999 | Unknown Other Error. |
>**错误码说明:**
>HTTP 错误码映射关系:2300000 + curl错误码。更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)。
**示例:**
```js
httpRequest.off('headerReceive');
```
### on\('headersReceive'\)<sup>8+</sup>
on\(type: 'headersReceive', callback: Callback<Object\>\): void
订阅HTTP Response Header 事件。
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | ------------------ | ---- | ---------------------------------- |
| type | string | 是 | 订阅的事件类型:'headersReceive'。 |
| callback | Callback\<Object\> | 是 | 回调函数。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300999 | Unknown Other Error. |
>**错误码说明:**
>HTTP 错误码映射关系:2300000 + curl错误码。更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)。
**示例:**
```js
httpRequest.on('headersReceive', (header) => {
console.info('header: ' + JSON.stringify(header));
});
```
### off\('headersReceive'\)<sup>8+</sup>
off\(type: 'headersReceive', callback?: Callback<Object\>\): void
取消订阅HTTP Response Header 事件。
>![](public_sys-resources/icon-note.gif) **说明:**
>可以指定传入on中的callback取消一个订阅,也可以不指定callback清空所有订阅。
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | ------------------ | ---- | -------------------------------------- |
| type | string | 是 | 取消订阅的事件类型:'headersReceive'。 |
| callback | Callback\<Object\> | 否 | 回调函数。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300999 | Unknown Other Error. |
>**错误码说明:**
>HTTP 错误码映射关系:2300000 + curl错误码。更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)。
**示例:**
```js
httpRequest.off('headersReceive');
```
### once\('headersReceive'\)<sup>8+</sup>
once\(type: 'headersReceive', callback: Callback<Object\>\): void
订阅HTTP Response Header 事件,但是只触发一次。一旦触发之后,订阅器就会被移除。使用callback方式作为异步方法。
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | ------------------ | ---- | ---------------------------------- |
| type | string | 是 | 订阅的事件类型:'headersReceive'。 |
| callback | Callback\<Object\> | 是 | 回调函数。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300999 | Unknown Other Error. |
>**错误码说明:**
>HTTP 错误码映射关系:2300000 + curl错误码。更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)。
**示例:**
```js
httpRequest.once('headersReceive', (header) => {
console.info('header: ' + JSON.stringify(header));
});
```
## HttpRequestOptions
发起请求可选参数的类型和取值范围。
**系统能力**:以下各项对应的系统能力均为SystemCapability.Communication.NetStack。
| 名称 | 类型 | 必填 | 说明 |
| -------------- | --------------------------------------------- | ---- | ------------------------------------------------------------ |
| method | [RequestMethod](#requestmethod) | 否 | 请求方式。 |
| extraData | string \| Object \| ArrayBuffer<sup>6+</sup> | 否 | 发送请求的额外数据。<br />- 当HTTP请求为POST、PUT等方法时,此字段为HTTP请求的content。<br />- 当HTTP请求为GET、OPTIONS、DELETE、TRACE、CONNECT等方法时,此字段为HTTP请求的参数补充,参数内容会拼接到URL中进行发送。<sup>6+</sup><br />- 开发者传入string对象,开发者需要自行编码,将编码后的string传入。<sup>6+</sup> |
| expectDataType<sup>9+</sup> | [HttpDataType](#httpdatatype9) | 否 | 指定返回数据的类型。如果设置了此参数,系统将优先返回指定的类型。 |
| usingCache<sup>9+</sup> | boolean | 否 | 是否使用缓存,默认为true。 |
| priority<sup>9+</sup> | number | 否 | 优先级,范围\[1,1000],默认是1。 |
| header | Object | 否 | HTTP请求头字段。默认{'Content-Type': 'application/json'}。 |
| readTimeout | number | 否 | 读取超时时间。单位为毫秒(ms),默认为60000ms。 |
| connectTimeout | number | 否 | 连接超时时间。单位为毫秒(ms),默认为60000ms。 |
| usingProtocol<sup>9+</sup> | [HttpProtocol](#httpprotocol9) | 否 | 使用协议。默认值由系统自动指定。 |
## RequestMethod
HTTP 请求方法。
**系统能力**:以下各项对应的系统能力均为SystemCapability.Communication.NetStack。
| 名称 | 值 | 说明 |
| :------ | ------- | :------------------ |
| OPTIONS | "OPTIONS" | HTTP 请求 OPTIONS。 |
| GET | "GET" | HTTP 请求 GET。 |
| HEAD | "HEAD" | HTTP 请求 HEAD。 |
| POST | "POST" | HTTP 请求 POST。 |
| PUT | "PUT" | HTTP 请求 PUT。 |
| DELETE | "DELETE" | HTTP 请求 DELETE。 |
| TRACE | "TRACE" | HTTP 请求 TRACE。 |
| CONNECT | "CONNECT" | HTTP 请求 CONNECT。 |
## ResponseCode
发起请求返回的响应码。
**系统能力**:以下各项对应的系统能力均为SystemCapability.Communication.NetStack。
| 名称 | 值 | 说明 |
| ----------------- | ---- | ------------------------------------------------------------ |
| OK | 200 | 请求成功。一般用于GET与POST请求。 |
| CREATED | 201 | 已创建。成功请求并创建了新的资源。 |
| ACCEPTED | 202 | 已接受。已经接受请求,但未处理完成。 |
| NOT_AUTHORITATIVE | 203 | 非授权信息。请求成功。 |
| NO_CONTENT | 204 | 无内容。服务器成功处理,但未返回内容。 |
| RESET | 205 | 重置内容。 |
| PARTIAL | 206 | 部分内容。服务器成功处理了部分GET请求。 |
| MULT_CHOICE | 300 | 多种选择。 |
| MOVED_PERM | 301 | 永久移动。请求的资源已被永久的移动到新URI,返回信息会包括新的URI,浏览器会自动定向到新URI。 |
| MOVED_TEMP | 302 | 临时移动。 |
| SEE_OTHER | 303 | 查看其它地址。 |
| NOT_MODIFIED | 304 | 未修改。 |
| USE_PROXY | 305 | 使用代理。 |
| BAD_REQUEST | 400 | 客户端请求的语法错误,服务器无法理解。 |
| UNAUTHORIZED | 401 | 请求要求用户的身份认证。 |
| PAYMENT_REQUIRED | 402 | 保留,将来使用。 |
| FORBIDDEN | 403 | 服务器理解请求客户端的请求,但是拒绝执行此请求。 |
| NOT_FOUND | 404 | 服务器无法根据客户端的请求找到资源(网页)。 |
| BAD_METHOD | 405 | 客户端请求中的方法被禁止。 |
| NOT_ACCEPTABLE | 406 | 服务器无法根据客户端请求的内容特性完成请求。 |
| PROXY_AUTH | 407 | 请求要求代理的身份认证。 |
| CLIENT_TIMEOUT | 408 | 请求时间过长,超时。 |
| CONFLICT | 409 | 服务器完成客户端的PUT请求是可能返回此代码,服务器处理请求时发生了冲突。 |
| GONE | 410 | 客户端请求的资源已经不存在。 |
| LENGTH_REQUIRED | 411 | 服务器无法处理客户端发送的不带Content-Length的请求信息。 |
| PRECON_FAILED | 412 | 客户端请求信息的先决条件错误。 |
| ENTITY_TOO_LARGE | 413 | 由于请求的实体过大,服务器无法处理,因此拒绝请求。 |
| REQ_TOO_LONG | 414 | 请求的URI过长(URI通常为网址),服务器无法处理。 |
| UNSUPPORTED_TYPE | 415 | 服务器无法处理请求的格式。 |
| INTERNAL_ERROR | 500 | 服务器内部错误,无法完成请求。 |
| NOT_IMPLEMENTED | 501 | 服务器不支持请求的功能,无法完成请求。 |
| BAD_GATEWAY | 502 | 充当网关或代理的服务器,从远端服务器接收到了一个无效的请求。 |
| UNAVAILABLE | 503 | 由于超载或系统维护,服务器暂时的无法处理客户端的请求。 |
| GATEWAY_TIMEOUT | 504 | 充当网关或代理的服务器,未及时从远端服务器获取请求。 |
| VERSION | 505 | 服务器请求的HTTP协议的版本。 |
## HttpResponse
request方法回调函数的返回值类型。
**系统能力**:以下各项对应的系统能力均为SystemCapability.Communication.NetStack。
| 名称 | 类型 | 必填 | 说明 |
| -------------------- | -------------------------------------------- | ---- | ------------------------------------------------------------ |
| result | string \| Object \| ArrayBuffer<sup>6+</sup> | 是 | HTTP请求根据响应头中Content-type类型返回对应的响应格式内容:<br />- application/json:返回JSON格式的字符串,如需HTTP响应具体内容,需开发者自行解析<br />- application/octet-stream:ArrayBuffer<br />- 其他:string |
| resultType<sup>9+</sup> | [HttpDataType](#httpdatatype9) | 是 | 返回值类型。 |
| responseCode | [ResponseCode](#responsecode) \| number | 是 | 回调函数执行成功时,此字段为[ResponseCode](#responsecode)。若执行失败,错误码将会从AsyncCallback中的err字段返回。 |
| header | Object | 是 | 发起HTTP请求返回来的响应头。当前返回的是JSON格式字符串,如需具体字段内容,需开发者自行解析。常见字段及解析方式如下:<br/>- Content-Type:header['Content-Type'];<br />- Status-Line:header['Status-Line'];<br />- Date:header.Date/header['Date'];<br />- Server:header.Server/header['Server']; |
| cookies<sup>8+</sup> | Array\<string\> | 是 | 服务器返回的 cookies。 |
## http.createHttpResponseCache<sup>9+</sup>
createHttpResponseCache(cacheSize?: number): HttpResponseCache
创建一个默认的对象来存储HTTP访问请求的响应。
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | --------------------------------------- | ---- | ---------- |
| cacheSize | number | 否 | 缓存大小最大为10\*1024\*1024(10MB),默认最大。 |
**返回值:**
| 类型 | 说明 |
| :---------- | :----------------------------------------------------------- |
| [HttpResponseCache](#httpresponsecache9) | 返回一个存储HTTP访问请求响应的对象。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300999 | Unknown Other Error. |
>**错误码说明:**
>HTTP 错误码映射关系:2300000 + curl错误码。更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)。
**示例:**
```js
import http from '@ohos.net.http';
let httpResponseCache = http.createHttpResponseCache();
```
## HttpResponseCache<sup>9+</sup>
存储HTTP访问请求响应的对象。
### flush<sup>9+</sup>
flush(callback: AsyncCallback\<void>): void
将缓存中的数据写入文件系统,以便在下一个HTTP请求中访问所有缓存数据,使用callback方式作为异步方法。
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | --------------------------------------- | ---- | ---------- |
| callback | AsyncCallback\<void> | 是 | 回调函数返回写入结果。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300027 | Out of memory. |
| 2300028 | Timeout was reached. |
| 2300070 | Disk full or allocation exceeded. |
| 2300999 | Unknown Other Error. |
>**错误码说明:**
>HTTP 错误码映射关系:2300000 + curl错误码。更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)。
**示例:**
```js
httpResponseCache.flush().then(() => {
console.log('flush success');
}).catch(err => {
console.log('flush fail');
});
```
### delete<sup>9+</sup>
delete(callback: AsyncCallback\<void>): void
禁用缓存并删除其中的数据,使用callback方式作为异步方法。
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | --------------------------------------- | ---- | ---------- |
| callback | AsyncCallback\<void> | 是 | 回调函数返回删除结果。|
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300999 | Unknown Other Error. |
>**错误码说明:**
>HTTP 错误码映射关系:2300000 + curl错误码。更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)。
**示例:**
```js
httpResponseCache.delete(err => {
if (err) {
console.log('delete fail');
return;
}
console.log('delete success');
});
```
### delete<sup>9+</sup>
delete(): Promise\<void>
禁用缓存并删除其中的数据,使用Promise方式作为异步方法。
**系统能力**:SystemCapability.Communication.NetStack
**返回值:**
| 类型 | 说明 |
| --------------------------------- | ------------------------------------- |
| Promise\<void> | 以Promise形式返回删除结果。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300999 | Unknown Other Error. |
>**错误码说明:**
>HTTP 错误码映射关系:2300000 + curl错误码。更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)。
**示例:**
```js
httpResponseCache.delete().then(() => {
console.log('delete success');
}).catch(err => {
console.log('delete fail');
});
```
## HttpDataType<sup>9+</sup>
http的数据类型。
**系统能力**:SystemCapability.Communication.NetStack
| 名称 | 值 | 说明 |
| ------------------ | -- | ----------- |
| STRING | 0 | 字符串类型。 |
| OBJECT | 1 | 对象类型。 |
| ARRAY_BUFFER | 2 | 二进制数组类型。|
## HttpProtocol<sup>9+</sup>
http协议版本。
**系统能力**:SystemCapability.Communication.NetStack
| 名称 | 说明 |
| :-------- | :----------- |
| HTTP1_1 | 协议http1.1 |
| HTTP2 | 协议http2 |
# @ohos.net.http (数据请求)
本模块提供HTTP数据请求能力。应用可以通过HTTP发起一个数据请求,支持常见的GET、POST、OPTIONS、HEAD、PUT、DELETE、TRACE、CONNECT方法。
>**说明:**
>
>本模块首批接口从API version 6开始支持。后续版本的新增接口,采用上角标单独标记接口的起始版本。
>
## 导入模块
```js
import http from '@ohos.net.http';
```
## 完整示例
```js
import http from '@ohos.net.http';
// 每一个httpRequest对应一个HTTP请求任务,不可复用
let httpRequest = http.createHttp();
// 用于订阅HTTP响应头,此接口会比request请求先返回。可以根据业务需要订阅此消息
// 从API 8开始,使用on('headersReceive', Callback)替代on('headerReceive', AsyncCallback)。 8+
httpRequest.on('headersReceive', (header) => {
console.info('header: ' + JSON.stringify(header));
});
httpRequest.request(
// 填写HTTP请求的URL地址,可以带参数也可以不带参数。URL地址需要开发者自定义。请求的参数可以在extraData中指定
"EXAMPLE_URL",
{
method: http.RequestMethod.POST, // 可选,默认为http.RequestMethod.GET
// 开发者根据自身业务需要添加header字段
header: {
'Content-Type': 'application/json'
},
// 当使用POST请求时此字段用于传递内容
extraData: {
"data": "data to send",
},
expectDataType: http.HttpDataType.STRING, // 可选,指定返回数据的类型
usingCache: true, // 可选,默认为true
priority: 1, // 可选,默认为1
connectTimeout: 60000, // 可选,默认为60000ms
readTimeout: 60000, // 可选,默认为60000ms
usingProtocol: http.HttpProtocol.HTTP1_1, // 可选,协议类型默认值由系统自动指定
}, (err, data) => {
if (!err) {
// data.result为HTTP响应内容,可根据业务需要进行解析
console.info('Result:' + data.result);
console.info('code:' + data.responseCode);
// data.header为HTTP响应头,可根据业务需要进行解析
console.info('header:' + JSON.stringify(data.header));
console.info('cookies:' + data.cookies); // 8+
} else {
console.info('error:' + JSON.stringify(err));
// 当该请求使用完毕时,调用destroy方法主动销毁。
httpRequest.destroy();
}
}
);
```
## http.createHttp
createHttp\(\): HttpRequest
创建一个HTTP请求,里面包括发起请求、中断请求、订阅/取消订阅HTTP Response Header事件。每一个HttpRequest对象对应一个HTTP请求。如需发起多个HTTP请求,须为每个HTTP请求创建对应HttpRequest对象。
**系统能力**:SystemCapability.Communication.NetStack
**返回值:**
| 类型 | 说明 |
| :---------- | :----------------------------------------------------------- |
| HttpRequest | 返回一个HttpRequest对象,里面包括request、destroy、on和off方法。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 2300999 | Unknown Other Error. |
>**错误码说明:**
>HTTP 错误码映射关系:2300000 + curl错误码。更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)。
**示例:**
```js
import http from '@ohos.net.http';
let httpRequest = http.createHttp();
```
## HttpRequest
HTTP请求任务。在调用HttpRequest的方法前,需要先通过[createHttp\(\)](#httpcreatehttp)创建一个任务。
### request
request\(url: string, callback: AsyncCallback\<HttpResponse\>\):void
根据URL地址,发起HTTP网络请求,使用callback方式作为异步方法。
**需要权限**:ohos.permission.INTERNET
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | ---------------------------------------------- | ---- | ----------------------- |
| url | string | 是 | 发起网络请求的URL地址。 |
| callback | AsyncCallback\<[HttpResponse](#httpresponse)\> | 是 | 回调函数。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300003 | URL using bad/illegal format or missing URL. |
| 2300007 | Couldn't connect to server. |
| 2300028 | Timeout was reached. |
| 2300052 | Server returned nothing (no headers, no data). |
| 2300999 | Unknown Other Error. |
>**错误码说明:**
>HTTP 错误码映射关系:2300000 + curl错误码。更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)。
**示例:**
```js
httpRequest.request("EXAMPLE_URL", (err, data) => {
if (!err) {
console.info('Result:' + data.result);
console.info('code:' + data.responseCode);
console.info('header:' + JSON.stringify(data.header));
console.info('cookies:' + data.cookies); // 8+
} else {
console.info('error:' + JSON.stringify(err));
}
});
```
### request
request\(url: string, options: HttpRequestOptions, callback: AsyncCallback<HttpResponse\>\):void
根据URL地址和相关配置项,发起HTTP网络请求,使用callback方式作为异步方法。
**需要权限**:ohos.permission.INTERNET
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | ---------------------------------------------- | ---- | ----------------------------------------------- |
| url | string | 是 | 发起网络请求的URL地址。 |
| options | HttpRequestOptions | 是 | 参考[HttpRequestOptions](#httprequestoptions)。 |
| callback | AsyncCallback\<[HttpResponse](#httpresponse)\> | 是 | 回调函数。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol. |
| 2300003 | URL using bad/illegal format or missing URL. |
| 2300005 | Couldn't resolve proxy name. |
| 2300006 | Couldn't resolve host name. |
| 2300007 | Couldn't connect to server. |
| 2300008 | Weird server reply. |
| 2300009 | Access denied to remote resource. |
| 2300016 | Error in the HTTP2 framing layer. |
| 2300018 | Transferred a partial file. |
| 2300023 | Failed writing received data to disk/application. |
| 2300025 | Upload failed. |
| 2300026 | Failed to open/read local data from file/application. |
| 2300027 | Out of memory. |
| 2300028 | Timeout was reached. |
| 2300047 | Number of redirects hit maximum amount. |
| 2300052 | Server returned nothing (no headers, no data). |
| 2300055 | Failed sending data to the peer. |
| 2300056 | Failure when receiving data from the peer. |
| 2300058 | Problem with the local SSL certificate. |
| 2300059 | Couldn't use specified SSL cipher. |
| 2300060 | SSL peer certificate or SSH remote key was not OK. |
| 2300061 | Unrecognized or bad HTTP Content or Transfer-Encoding.|
| 2300063 | Maximum file size exceeded. |
| 2300070 | Disk full or allocation exceeded. |
| 2300073 | Remote file already exists. |
| 2300077 | Problem with the SSL CA cert (path? access rights?). |
| 2300078 | Remote file not found. |
| 2300094 | An authentication function returned an error. |
| 2300999 | Unknown Other Error. |
>**错误码说明:**
>HTTP 错误码映射关系:2300000 + curl错误码。更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)。
**示例:**
```js
httpRequest.request("EXAMPLE_URL",
{
method: http.RequestMethod.GET,
header: {
'Content-Type': 'application/json'
},
readTimeout: 60000,
connectTimeout: 60000
}, (err, data) => {
if (!err) {
console.info('Result:' + data.result);
console.info('code:' + data.responseCode);
console.info('header:' + JSON.stringify(data.header));
console.info('cookies:' + data.cookies); // 8+
console.info('header.Content-Type:' + data.header['Content-Type']);
console.info('header.Status-Line:' + data.header['Status-Line']);
} else {
console.info('error:' + JSON.stringify(err));
}
});
```
### request
request\(url: string, options? : HttpRequestOptions\): Promise<HttpResponse\>
根据URL地址,发起HTTP网络请求,使用Promise方式作为异步方法。
**需要权限**:ohos.permission.INTERNET
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| ------- | ------------------ | ---- | ----------------------------------------------- |
| url | string | 是 | 发起网络请求的URL地址。 |
| options | HttpRequestOptions | 否 | 参考[HttpRequestOptions](#httprequestoptions)。 |
**返回值:**
| 类型 | 说明 |
| :------------------------------------- | :-------------------------------- |
| Promise<[HttpResponse](#httpresponse)> | 以Promise形式返回发起请求的结果。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol. |
| 2300003 | URL using bad/illegal format or missing URL. |
| 2300005 | Couldn't resolve proxy name. |
| 2300006 | Couldn't resolve host name. |
| 2300007 | Couldn't connect to server. |
| 2300008 | Weird server reply. |
| 2300009 | Access denied to remote resource. |
| 2300016 | Error in the HTTP2 framing layer. |
| 2300018 | Transferred a partial file. |
| 2300023 | Failed writing received data to disk/application. |
| 2300025 | Upload failed. |
| 2300026 | Failed to open/read local data from file/application. |
| 2300027 | Out of memory. |
| 2300028 | Timeout was reached. |
| 2300047 | Number of redirects hit maximum amount. |
| 2300052 | Server returned nothing (no headers, no data). |
| 2300055 | Failed sending data to the peer. |
| 2300056 | Failure when receiving data from the peer. |
| 2300058 | Problem with the local SSL certificate. |
| 2300059 | Couldn't use specified SSL cipher. |
| 2300060 | SSL peer certificate or SSH remote key was not OK. |
| 2300061 | Unrecognized or bad HTTP Content or Transfer-Encoding.|
| 2300063 | Maximum file size exceeded. |
| 2300070 | Disk full or allocation exceeded. |
| 2300073 | Remote file already exists. |
| 2300077 | Problem with the SSL CA cert (path? access rights?). |
| 2300078 | Remote file not found. |
| 2300094 | An authentication function returned an error. |
| 2300999 | Unknown Other Error. |
>**错误码说明:**
>HTTP 错误码映射关系:2300000 + curl错误码。更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)。
**示例:**
```js
let promise = httpRequest.request("EXAMPLE_URL", {
method: http.RequestMethod.GET,
connectTimeout: 60000,
readTimeout: 60000,
header: {
'Content-Type': 'application/json'
}
});
promise.then((data) => {
console.info('Result:' + data.result);
console.info('code:' + data.responseCode);
console.info('header:' + JSON.stringify(data.header));
console.info('cookies:' + data.cookies); // 8+
console.info('header.Content-Type:' + data.header['Content-Type']);
console.info('header.Status-Line:' + data.header['Status-Line']);
}).catch((err) => {
console.info('error:' + JSON.stringify(err));
});
```
### destroy
destroy\(\): void
中断请求任务。
**系统能力**:SystemCapability.Communication.NetStack
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 2300999 | Unknown Other Error. |
>**错误码说明:**
>HTTP 错误码映射关系:2300000 + curl错误码。更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)。
**示例:**
```js
httpRequest.destroy();
```
### on\('headerReceive'\)
on\(type: 'headerReceive', callback: AsyncCallback<Object\>\): void
订阅HTTP Response Header 事件。
>![](public_sys-resources/icon-note.gif) **说明:**
>此接口已废弃,建议使用[on\('headersReceive'\)<sup>8+</sup>](#onheadersreceive8)替代。
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | ----------------------- | ---- | --------------------------------- |
| type | string | 是 | 订阅的事件类型,'headerReceive'。 |
| callback | AsyncCallback\<Object\> | 是 | 回调函数。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300999 | Unknown Other Error. |
>**错误码说明:**
>HTTP 错误码映射关系:2300000 + curl错误码。更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)。
**示例:**
```js
httpRequest.on('headerReceive', (err, data) => {
if (!err) {
console.info('header: ' + JSON.stringify(data));
} else {
console.info('error:' + JSON.stringify(err));
}
});
```
### off\('headerReceive'\)
off\(type: 'headerReceive', callback?: AsyncCallback<Object\>\): void
取消订阅HTTP Response Header 事件。
>![](public_sys-resources/icon-note.gif) **说明:**
>
>1. 此接口已废弃,建议使用[off\('headersReceive'\)<sup>8+</sup>](#offheadersreceive8)替代。
>
>2. 可以指定传入on中的callback取消一个订阅,也可以不指定callback清空所有订阅。
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | ----------------------- | ---- | ------------------------------------- |
| type | string | 是 | 取消订阅的事件类型,'headerReceive'。 |
| callback | AsyncCallback\<Object\> | 否 | 回调函数。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300999 | Unknown Other Error. |
>**错误码说明:**
>HTTP 错误码映射关系:2300000 + curl错误码。更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)。
**示例:**
```js
httpRequest.off('headerReceive');
```
### on\('headersReceive'\)<sup>8+</sup>
on\(type: 'headersReceive', callback: Callback<Object\>\): void
订阅HTTP Response Header 事件。
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | ------------------ | ---- | ---------------------------------- |
| type | string | 是 | 订阅的事件类型:'headersReceive'。 |
| callback | Callback\<Object\> | 是 | 回调函数。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300999 | Unknown Other Error. |
>**错误码说明:**
>HTTP 错误码映射关系:2300000 + curl错误码。更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)。
**示例:**
```js
httpRequest.on('headersReceive', (header) => {
console.info('header: ' + JSON.stringify(header));
});
```
### off\('headersReceive'\)<sup>8+</sup>
off\(type: 'headersReceive', callback?: Callback<Object\>\): void
取消订阅HTTP Response Header 事件。
>![](public_sys-resources/icon-note.gif) **说明:**
>可以指定传入on中的callback取消一个订阅,也可以不指定callback清空所有订阅。
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | ------------------ | ---- | -------------------------------------- |
| type | string | 是 | 取消订阅的事件类型:'headersReceive'。 |
| callback | Callback\<Object\> | 否 | 回调函数。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300999 | Unknown Other Error. |
>**错误码说明:**
>HTTP 错误码映射关系:2300000 + curl错误码。更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)。
**示例:**
```js
httpRequest.off('headersReceive');
```
### once\('headersReceive'\)<sup>8+</sup>
once\(type: 'headersReceive', callback: Callback<Object\>\): void
订阅HTTP Response Header 事件,但是只触发一次。一旦触发之后,订阅器就会被移除。使用callback方式作为异步方法。
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | ------------------ | ---- | ---------------------------------- |
| type | string | 是 | 订阅的事件类型:'headersReceive'。 |
| callback | Callback\<Object\> | 是 | 回调函数。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300999 | Unknown Other Error. |
>**错误码说明:**
>HTTP 错误码映射关系:2300000 + curl错误码。更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)。
**示例:**
```js
httpRequest.once('headersReceive', (header) => {
console.info('header: ' + JSON.stringify(header));
});
```
## HttpRequestOptions
发起请求可选参数的类型和取值范围。
**系统能力**:以下各项对应的系统能力均为SystemCapability.Communication.NetStack。
| 名称 | 类型 | 必填 | 说明 |
| -------------- | --------------------------------------------- | ---- | ------------------------------------------------------------ |
| method | [RequestMethod](#requestmethod) | 否 | 请求方式。 |
| extraData | string \| Object \| ArrayBuffer<sup>6+</sup> | 否 | 发送请求的额外数据。<br />- 当HTTP请求为POST、PUT等方法时,此字段为HTTP请求的content。<br />- 当HTTP请求为GET、OPTIONS、DELETE、TRACE、CONNECT等方法时,此字段为HTTP请求的参数补充,参数内容会拼接到URL中进行发送。<sup>6+</sup><br />- 开发者传入string对象,开发者需要自行编码,将编码后的string传入。<sup>6+</sup> |
| expectDataType<sup>9+</sup> | [HttpDataType](#httpdatatype9) | 否 | 指定返回数据的类型。如果设置了此参数,系统将优先返回指定的类型。 |
| usingCache<sup>9+</sup> | boolean | 否 | 是否使用缓存,默认为true。 |
| priority<sup>9+</sup> | number | 否 | 优先级,范围\[1,1000],默认是1。 |
| header | Object | 否 | HTTP请求头字段。默认{'Content-Type': 'application/json'}。 |
| readTimeout | number | 否 | 读取超时时间。单位为毫秒(ms),默认为60000ms。 |
| connectTimeout | number | 否 | 连接超时时间。单位为毫秒(ms),默认为60000ms。 |
| usingProtocol<sup>9+</sup> | [HttpProtocol](#httpprotocol9) | 否 | 使用协议。默认值由系统自动指定。 |
## RequestMethod
HTTP 请求方法。
**系统能力**:以下各项对应的系统能力均为SystemCapability.Communication.NetStack。
| 名称 | 值 | 说明 |
| :------ | ------- | :------------------ |
| OPTIONS | "OPTIONS" | HTTP 请求 OPTIONS。 |
| GET | "GET" | HTTP 请求 GET。 |
| HEAD | "HEAD" | HTTP 请求 HEAD。 |
| POST | "POST" | HTTP 请求 POST。 |
| PUT | "PUT" | HTTP 请求 PUT。 |
| DELETE | "DELETE" | HTTP 请求 DELETE。 |
| TRACE | "TRACE" | HTTP 请求 TRACE。 |
| CONNECT | "CONNECT" | HTTP 请求 CONNECT。 |
## ResponseCode
发起请求返回的响应码。
**系统能力**:以下各项对应的系统能力均为SystemCapability.Communication.NetStack。
| 名称 | 值 | 说明 |
| ----------------- | ---- | ------------------------------------------------------------ |
| OK | 200 | 请求成功。一般用于GET与POST请求。 |
| CREATED | 201 | 已创建。成功请求并创建了新的资源。 |
| ACCEPTED | 202 | 已接受。已经接受请求,但未处理完成。 |
| NOT_AUTHORITATIVE | 203 | 非授权信息。请求成功。 |
| NO_CONTENT | 204 | 无内容。服务器成功处理,但未返回内容。 |
| RESET | 205 | 重置内容。 |
| PARTIAL | 206 | 部分内容。服务器成功处理了部分GET请求。 |
| MULT_CHOICE | 300 | 多种选择。 |
| MOVED_PERM | 301 | 永久移动。请求的资源已被永久的移动到新URI,返回信息会包括新的URI,浏览器会自动定向到新URI。 |
| MOVED_TEMP | 302 | 临时移动。 |
| SEE_OTHER | 303 | 查看其它地址。 |
| NOT_MODIFIED | 304 | 未修改。 |
| USE_PROXY | 305 | 使用代理。 |
| BAD_REQUEST | 400 | 客户端请求的语法错误,服务器无法理解。 |
| UNAUTHORIZED | 401 | 请求要求用户的身份认证。 |
| PAYMENT_REQUIRED | 402 | 保留,将来使用。 |
| FORBIDDEN | 403 | 服务器理解请求客户端的请求,但是拒绝执行此请求。 |
| NOT_FOUND | 404 | 服务器无法根据客户端的请求找到资源(网页)。 |
| BAD_METHOD | 405 | 客户端请求中的方法被禁止。 |
| NOT_ACCEPTABLE | 406 | 服务器无法根据客户端请求的内容特性完成请求。 |
| PROXY_AUTH | 407 | 请求要求代理的身份认证。 |
| CLIENT_TIMEOUT | 408 | 请求时间过长,超时。 |
| CONFLICT | 409 | 服务器完成客户端的PUT请求是可能返回此代码,服务器处理请求时发生了冲突。 |
| GONE | 410 | 客户端请求的资源已经不存在。 |
| LENGTH_REQUIRED | 411 | 服务器无法处理客户端发送的不带Content-Length的请求信息。 |
| PRECON_FAILED | 412 | 客户端请求信息的先决条件错误。 |
| ENTITY_TOO_LARGE | 413 | 由于请求的实体过大,服务器无法处理,因此拒绝请求。 |
| REQ_TOO_LONG | 414 | 请求的URI过长(URI通常为网址),服务器无法处理。 |
| UNSUPPORTED_TYPE | 415 | 服务器无法处理请求的格式。 |
| INTERNAL_ERROR | 500 | 服务器内部错误,无法完成请求。 |
| NOT_IMPLEMENTED | 501 | 服务器不支持请求的功能,无法完成请求。 |
| BAD_GATEWAY | 502 | 充当网关或代理的服务器,从远端服务器接收到了一个无效的请求。 |
| UNAVAILABLE | 503 | 由于超载或系统维护,服务器暂时的无法处理客户端的请求。 |
| GATEWAY_TIMEOUT | 504 | 充当网关或代理的服务器,未及时从远端服务器获取请求。 |
| VERSION | 505 | 服务器请求的HTTP协议的版本。 |
## HttpResponse
request方法回调函数的返回值类型。
**系统能力**:以下各项对应的系统能力均为SystemCapability.Communication.NetStack。
| 名称 | 类型 | 必填 | 说明 |
| -------------------- | -------------------------------------------- | ---- | ------------------------------------------------------------ |
| result | string \| Object \| ArrayBuffer<sup>6+</sup> | 是 | HTTP请求根据响应头中Content-type类型返回对应的响应格式内容:<br />- application/json:返回JSON格式的字符串,如需HTTP响应具体内容,需开发者自行解析<br />- application/octet-stream:ArrayBuffer<br />- 其他:string |
| resultType<sup>9+</sup> | [HttpDataType](#httpdatatype9) | 是 | 返回值类型。 |
| responseCode | [ResponseCode](#responsecode) \| number | 是 | 回调函数执行成功时,此字段为[ResponseCode](#responsecode)。若执行失败,错误码将会从AsyncCallback中的err字段返回。 |
| header | Object | 是 | 发起HTTP请求返回来的响应头。当前返回的是JSON格式字符串,如需具体字段内容,需开发者自行解析。常见字段及解析方式如下:<br/>- Content-Type:header['Content-Type'];<br />- Status-Line:header['Status-Line'];<br />- Date:header.Date/header['Date'];<br />- Server:header.Server/header['Server']; |
| cookies<sup>8+</sup> | Array\<string\> | 是 | 服务器返回的 cookies。 |
## http.createHttpResponseCache<sup>9+</sup>
createHttpResponseCache(cacheSize?: number): HttpResponseCache
创建一个默认的对象来存储HTTP访问请求的响应。
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | --------------------------------------- | ---- | ---------- |
| cacheSize | number | 否 | 缓存大小最大为10\*1024\*1024(10MB),默认最大。 |
**返回值:**
| 类型 | 说明 |
| :---------- | :----------------------------------------------------------- |
| [HttpResponseCache](#httpresponsecache9) | 返回一个存储HTTP访问请求响应的对象。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300999 | Unknown Other Error. |
>**错误码说明:**
>HTTP 错误码映射关系:2300000 + curl错误码。更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)。
**示例:**
```js
import http from '@ohos.net.http';
let httpResponseCache = http.createHttpResponseCache();
```
## HttpResponseCache<sup>9+</sup>
存储HTTP访问请求响应的对象。
### flush<sup>9+</sup>
flush(callback: AsyncCallback\<void>): void
将缓存中的数据写入文件系统,以便在下一个HTTP请求中访问所有缓存数据,使用callback方式作为异步方法。
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | --------------------------------------- | ---- | ---------- |
| callback | AsyncCallback\<void> | 是 | 回调函数返回写入结果。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300027 | Out of memory. |
| 2300028 | Timeout was reached. |
| 2300070 | Disk full or allocation exceeded. |
| 2300999 | Unknown Other Error. |
>**错误码说明:**
>HTTP 错误码映射关系:2300000 + curl错误码。更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)。
**示例:**
```js
httpResponseCache.flush().then(() => {
console.log('flush success');
}).catch(err => {
console.log('flush fail');
});
```
### delete<sup>9+</sup>
delete(callback: AsyncCallback\<void>): void
禁用缓存并删除其中的数据,使用callback方式作为异步方法。
**系统能力**:SystemCapability.Communication.NetStack
**参数:**
| 参数名 | 类型 | 必填 | 说明 |
| -------- | --------------------------------------- | ---- | ---------- |
| callback | AsyncCallback\<void> | 是 | 回调函数返回删除结果。|
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300999 | Unknown Other Error. |
>**错误码说明:**
>HTTP 错误码映射关系:2300000 + curl错误码。更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)。
**示例:**
```js
httpResponseCache.delete(err => {
if (err) {
console.log('delete fail');
return;
}
console.log('delete success');
});
```
### delete<sup>9+</sup>
delete(): Promise\<void>
禁用缓存并删除其中的数据,使用Promise方式作为异步方法。
**系统能力**:SystemCapability.Communication.NetStack
**返回值:**
| 类型 | 说明 |
| --------------------------------- | ------------------------------------- |
| Promise\<void> | 以Promise形式返回删除结果。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300999 | Unknown Other Error. |
>**错误码说明:**
>HTTP 错误码映射关系:2300000 + curl错误码。更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)。
**示例:**
```js
httpResponseCache.delete().then(() => {
console.log('delete success');
}).catch(err => {
console.log('delete fail');
});
```
## HttpDataType<sup>9+</sup>
http的数据类型。
**系统能力**:SystemCapability.Communication.NetStack
| 名称 | 值 | 说明 |
| ------------------ | -- | ----------- |
| STRING | 0 | 字符串类型。 |
| OBJECT | 1 | 对象类型。 |
| ARRAY_BUFFER | 2 | 二进制数组类型。|
## HttpProtocol<sup>9+</sup>
http协议版本。
**系统能力**:SystemCapability.Communication.NetStack
| 名称 | 说明 |
| :-------- | :----------- |
| HTTP1_1 | 协议http1.1 |
| HTTP2 | 协议http2 |
......@@ -79,12 +79,11 @@ createHttp\(\): HttpRequest
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2100002 | System internal error. |
| 2300999 | Unknown Other Error |
| 2300999 | Unknown Other Error. |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
>**错误码说明:**
>HTTP 错误码映射关系:2300000 + curl错误码。更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)。
**示例:**
......@@ -114,21 +113,19 @@ request\(url: string, callback: AsyncCallback\<HttpResponse\>\):void
| url | string | 是 | 发起网络请求的URL地址。 |
| callback | AsyncCallback\<[HttpResponse](#httpresponse)\> | 是 | 回调函数。 |
**错误码:**
**错误码**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol |
| 2300003 | URL using bad/illegal format or missing URL |
| 2300005 | Couldn't resolve proxy name |
| 2300006 | Couldn't resolve host name |
| 2300007 | Couldn't connect to server |
| 2300052 | Server returned nothing (no headers, no data) |
| 2300999 | Unknown Other Error |
| 2300003 | URL using bad/illegal format or missing URL. |
| 2300007 | Couldn't connect to server. |
| 2300028 | Timeout was reached. |
| 2300052 | Server returned nothing (no headers, no data). |
| 2300999 | Unknown Other Error. |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
>**错误码说明:**
>HTTP 错误码映射关系:2300000 + curl错误码。更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)。
**示例:**
......@@ -163,22 +160,43 @@ request\(url: string, options: HttpRequestOptions, callback: AsyncCallback<HttpR
| options | HttpRequestOptions | 是 | 参考[HttpRequestOptions](#httprequestoptions)。 |
| callback | AsyncCallback\<[HttpResponse](#httpresponse)\> | 是 | 回调函数。 |
**错误码:**
**错误码**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol |
| 2300003 | URL using bad/illegal format or missing URL |
| 2300005 | Couldn't resolve proxy name |
| 2300006 | Couldn't resolve host name |
| 2300007 | Couldn't connect to server |
| 2300008 | Weird server reply |
| 2300009 | Access denied to remote resource |
| 2300999 | Unknown Other Error |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
| 2300001 | Unsupported protocol. |
| 2300003 | URL using bad/illegal format or missing URL. |
| 2300005 | Couldn't resolve proxy name. |
| 2300006 | Couldn't resolve host name. |
| 2300007 | Couldn't connect to server. |
| 2300008 | Weird server reply. |
| 2300009 | Access denied to remote resource. |
| 2300016 | Error in the HTTP2 framing layer. |
| 2300018 | Transferred a partial file. |
| 2300023 | Failed writing received data to disk/application. |
| 2300025 | Upload failed. |
| 2300026 | Failed to open/read local data from file/application. |
| 2300027 | Out of memory. |
| 2300028 | Timeout was reached. |
| 2300047 | Number of redirects hit maximum amount. |
| 2300052 | Server returned nothing (no headers, no data). |
| 2300055 | Failed sending data to the peer. |
| 2300056 | Failure when receiving data from the peer. |
| 2300058 | Problem with the local SSL certificate. |
| 2300059 | Couldn't use specified SSL cipher. |
| 2300060 | SSL peer certificate or SSH remote key was not OK. |
| 2300061 | Unrecognized or bad HTTP Content or Transfer-Encoding.|
| 2300063 | Maximum file size exceeded. |
| 2300070 | Disk full or allocation exceeded. |
| 2300073 | Remote file already exists. |
| 2300077 | Problem with the SSL CA cert (path? access rights?). |
| 2300078 | Remote file not found. |
| 2300094 | An authentication function returned an error. |
| 2300999 | Unknown Other Error. |
>**错误码说明:**
>HTTP 错误码映射关系:2300000 + curl错误码。更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)。
**示例:**
......@@ -228,20 +246,43 @@ request\(url: string, options? : HttpRequestOptions\): Promise<HttpResponse\>
| :------------------------------------- | :-------------------------------- |
| Promise<[HttpResponse](#httpresponse)> | 以Promise形式返回发起请求的结果。 |
**错误码:**
**错误码**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol |
| 2300003 | URL using bad/illegal format or missing URL |
| 2300005 | Couldn't resolve proxy name |
| 2300006 | Couldn't resolve host name |
| 2300007 | Couldn't connect to server |
| 2300009 | Access denied to remote resource |
| 2300999 | Unknown Other Error |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
| 2300001 | Unsupported protocol. |
| 2300003 | URL using bad/illegal format or missing URL. |
| 2300005 | Couldn't resolve proxy name. |
| 2300006 | Couldn't resolve host name. |
| 2300007 | Couldn't connect to server. |
| 2300008 | Weird server reply. |
| 2300009 | Access denied to remote resource. |
| 2300016 | Error in the HTTP2 framing layer. |
| 2300018 | Transferred a partial file. |
| 2300023 | Failed writing received data to disk/application. |
| 2300025 | Upload failed. |
| 2300026 | Failed to open/read local data from file/application. |
| 2300027 | Out of memory. |
| 2300028 | Timeout was reached. |
| 2300047 | Number of redirects hit maximum amount. |
| 2300052 | Server returned nothing (no headers, no data). |
| 2300055 | Failed sending data to the peer. |
| 2300056 | Failure when receiving data from the peer. |
| 2300058 | Problem with the local SSL certificate. |
| 2300059 | Couldn't use specified SSL cipher. |
| 2300060 | SSL peer certificate or SSH remote key was not OK. |
| 2300061 | Unrecognized or bad HTTP Content or Transfer-Encoding.|
| 2300063 | Maximum file size exceeded. |
| 2300070 | Disk full or allocation exceeded. |
| 2300073 | Remote file already exists. |
| 2300077 | Problem with the SSL CA cert (path? access rights?). |
| 2300078 | Remote file not found. |
| 2300094 | An authentication function returned an error. |
| 2300999 | Unknown Other Error. |
>**错误码说明:**
>HTTP 错误码映射关系:2300000 + curl错误码。更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)。
**示例:**
......@@ -278,10 +319,10 @@ destroy\(\): void
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300999 | Unknown Other Error |
| 2300999 | Unknown Other Error. |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
>**错误码说明:**
>HTTP 错误码映射关系:2300000 + curl错误码。更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)。
**示例:**
......@@ -307,34 +348,15 @@ on\(type: 'headerReceive', callback: AsyncCallback<Object\>\): void
| type | string | 是 | 订阅的事件类型,'headerReceive'。 |
| callback | AsyncCallback\<Object\> | 是 | 回调函数。 |
**错误码:**
**错误码**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol |
| 2300003 | URL using bad/illegal format or missing URL |
| 2300005 | Couldn't resolve proxy name |
| 2300006 | Couldn't resolve host name |
| 2300007 | Couldn't connect to server |
| 2300008 | Weird server reply |
| 2300009 | Access denied to remote resource |
| 2300023 | Failed writing received data to disk/application |
| 2300025 | Upload failed |
| 2300027 | Out of memory |
| 2300028 | Timeout was reached |
| 2300052 | Server returned nothing (no headers, no data) |
| 2300056 | Failure when receiving data from the peer |
| 2300058 | Problem with the local SSL certificate |
| 2300060 | SSL peer certificate or SSH remote key was not OK |
| 2300061 | Unrecognized or bad HTTP Content or Transfer-Encoding |
| 2300063 | Maximum file size exceeded |
| 2300070 | Disk full or allocation exceeded |
| 2300077 | Problem with the SSL CA cert (path? access rights?) |
| 2300078 | Remote file not found |
| 2300999 | Unknown Other Error |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
| 2300999 | Unknown Other Error. |
>**错误码说明:**
>HTTP 错误码映射关系:2300000 + curl错误码。更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)。
**示例:**
......@@ -369,21 +391,15 @@ off\(type: 'headerReceive', callback?: AsyncCallback<Object\>\): void
| type | string | 是 | 取消订阅的事件类型,'headerReceive'。 |
| callback | AsyncCallback\<Object\> | 否 | 回调函数。 |
**错误码:**
**错误码**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol |
| 2300003 | URL using bad/illegal format or missing URL |
| 2300005 | Couldn't resolve proxy name |
| 2300006 | Couldn't resolve host name |
| 2300007 | Couldn't connect to server |
| 2300008 | Weird server reply |
| 2300009 | Access denied to remote resource |
| 2300999 | Unknown Other Error |
| 2300999 | Unknown Other Error. |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
>**错误码说明:**
>HTTP 错误码映射关系:2300000 + curl错误码。更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)。
**示例:**
......@@ -406,34 +422,15 @@ on\(type: 'headersReceive', callback: Callback<Object\>\): void
| type | string | 是 | 订阅的事件类型:'headersReceive'。 |
| callback | Callback\<Object\> | 是 | 回调函数。 |
**错误码:**
**错误码**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol |
| 2300003 | URL using bad/illegal format or missing URL |
| 2300005 | Couldn't resolve proxy name |
| 2300006 | Couldn't resolve host name |
| 2300007 | Couldn't connect to server |
| 2300008 | Weird server reply |
| 2300009 | Access denied to remote resource |
| 2300023 | Failed writing received data to disk/application |
| 2300025 | Upload failed |
| 2300027 | Out of memory |
| 2300028 | Timeout was reached |
| 2300052 | Server returned nothing (no headers, no data) |
| 2300056 | Failure when receiving data from the peer |
| 2300058 | Problem with the local SSL certificate |
| 2300060 | SSL peer certificate or SSH remote key was not OK |
| 2300061 | Unrecognized or bad HTTP Content or Transfer-Encoding |
| 2300063 | Maximum file size exceeded |
| 2300070 | Disk full or allocation exceeded |
| 2300077 | Problem with the SSL CA cert (path? access rights?) |
| 2300078 | Remote file not found |
| 2300999 | Unknown Other Error |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
| 2300999 | Unknown Other Error. |
>**错误码说明:**
>HTTP 错误码映射关系:2300000 + curl错误码。更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)。
**示例:**
......@@ -461,21 +458,15 @@ off\(type: 'headersReceive', callback?: Callback<Object\>\): void
| type | string | 是 | 取消订阅的事件类型:'headersReceive'。 |
| callback | Callback\<Object\> | 否 | 回调函数。 |
**错误码:**
**错误码**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol |
| 2300003 | URL using bad/illegal format or missing URL |
| 2300005 | Couldn't resolve proxy name |
| 2300006 | Couldn't resolve host name |
| 2300007 | Couldn't connect to server |
| 2300008 | Weird server reply |
| 2300009 | Access denied to remote resource |
| 2300999 | Unknown Other Error |
| 2300999 | Unknown Other Error. |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
>**错误码说明:**
>HTTP 错误码映射关系:2300000 + curl错误码。更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)。
**示例:**
......@@ -498,34 +489,15 @@ once\(type: 'headersReceive', callback: Callback<Object\>\): void
| type | string | 是 | 订阅的事件类型:'headersReceive'。 |
| callback | Callback\<Object\> | 是 | 回调函数。 |
**错误码:**
**错误码**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol |
| 2300003 | URL using bad/illegal format or missing URL |
| 2300005 | Couldn't resolve proxy name |
| 2300006 | Couldn't resolve host name |
| 2300007 | Couldn't connect to server |
| 2300008 | Weird server reply |
| 2300009 | Access denied to remote resource |
| 2300023 | Failed writing received data to disk/application |
| 2300025 | Upload failed |
| 2300027 | Out of memory |
| 2300028 | Timeout was reached |
| 2300052 | Server returned nothing (no headers, no data) |
| 2300056 | Failure when receiving data from the peer |
| 2300058 | Problem with the local SSL certificate |
| 2300060 | SSL peer certificate or SSH remote key was not OK |
| 2300061 | Unrecognized or bad HTTP Content or Transfer-Encoding |
| 2300063 | Maximum file size exceeded |
| 2300070 | Disk full or allocation exceeded |
| 2300077 | Problem with the SSL CA cert (path? access rights?) |
| 2300078 | Remote file not found |
| 2300999 | Unknown Other Error |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
| 2300999 | Unknown Other Error. |
>**错误码说明:**
>HTTP 错误码映射关系:2300000 + curl错误码。更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)。
**示例:**
......@@ -653,32 +625,10 @@ createHttpResponseCache(cacheSize?: number): HttpResponseCache
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300008 | Weird server reply |
| 2300009 | Access denied to remote resource |
| 2300016 | Error in the HTTP2 framing layer |
| 2300018 | Transferred a partial file |
| 2300023 | Failed writing received data to disk/application |
| 2300025 | Upload failed |
| 2300026 | Failed to open/read local data from file/application |
| 2300027 | Out of memory |
| 2300028 | Timeout was reached |
| 2300047 | Number of redirects hit maximum amount |
| 2300052 | Server returned nothing (no headers, no data) |
| 2300055 | Failed sending data to the peer |
| 2300056 | Failure when receiving data from the peer |
| 2300058 | Problem with the local SSL certificate |
| 2300059 | Couldn't use specified SSL cipher |
| 2300060 | SSL peer certificate or SSH remote key was not OK |
| 2300061 | Unrecognized or bad HTTP Content or Transfer-Encoding |
| 2300063 | Maximum file size exceeded |
| 2300070 | Disk full or allocation exceeded |
| 2300073 | Remote file already exists |
| 2300077 | Problem with the SSL CA cert (path? access rights?) |
| 2300078 | Remote file not found |
| 2300094 | An authentication function returned an error |
| 2300999 | Unknown Other Error |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
| 2300999 | Unknown Other Error. |
>**错误码说明:**
>HTTP 错误码映射关系:2300000 + curl错误码。更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)。
**示例:**
......@@ -710,92 +660,13 @@ flush(callback: AsyncCallback\<void>): void
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol |
| 2300008 | Weird server reply |
| 2300009 | Access denied to remote resource |
| 2300016 | Error in the HTTP2 framing layer |
| 2300018 | Transferred a partial file |
| 2300023 | Failed writing received data to disk/application |
| 2300025 | Upload failed |
| 2300026 | Failed to open/read local data from file/application |
| 2300027 | Out of memory |
| 2300028 | Timeout was reached |
| 2300047 | Number of redirects hit maximum amount |
| 2300052 | Server returned nothing (no headers, no data) |
| 2300055 | Failed sending data to the peer |
| 2300056 | Failure when receiving data from the peer |
| 2300058 | Problem with the local SSL certificate |
| 2300059 | Couldn't use specified SSL cipher |
| 2300060 | SSL peer certificate or SSH remote key was not OK |
| 2300061 | Unrecognized or bad HTTP Content or Transfer-Encoding |
| 2300063 | Maximum file size exceeded |
| 2300070 | Disk full or allocation exceeded |
| 2300073 | Remote file already exists |
| 2300077 | Problem with the SSL CA cert (path? access rights?) |
| 2300078 | Remote file not found |
| 2300094 | An authentication function returned an error |
| 2300999 | Unknown Other Error |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
**示例:**
```js
httpResponseCache.flush(err => {
if (err) {
console.log('flush fail');
return;
}
console.log('flush success');
});
```
| 2300027 | Out of memory. |
| 2300028 | Timeout was reached. |
| 2300070 | Disk full or allocation exceeded. |
| 2300999 | Unknown Other Error. |
### flush<sup>9+</sup>
flush(): Promise\<void>
将缓存中的数据写入文件系统,以便在下一个HTTP请求中访问所有缓存数据,使用Promise方式作为异步方法。
**系统能力**:SystemCapability.Communication.NetStack
**返回值:**
| 类型 | 说明 |
| --------------------------------- | ------------------------------------- |
| Promise\<void>> | 以Promise形式返回写入结果。 |
**错误码:**
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol |
| 2300008 | Weird server reply |
| 2300009 | Access denied to remote resource |
| 2300016 | Error in the HTTP2 framing layer |
| 2300018 | Transferred a partial file |
| 2300023 | Failed writing received data to disk/application |
| 2300025 | Upload failed |
| 2300026 | Failed to open/read local data from file/application |
| 2300027 | Out of memory |
| 2300028 | Timeout was reached |
| 2300047 | Number of redirects hit maximum amount |
| 2300052 | Server returned nothing (no headers, no data) |
| 2300055 | Failed sending data to the peer |
| 2300056 | Failure when receiving data from the peer |
| 2300058 | Problem with the local SSL certificate |
| 2300059 | Couldn't use specified SSL cipher |
| 2300060 | SSL peer certificate or SSH remote key was not OK |
| 2300061 | Unrecognized or bad HTTP Content or Transfer-Encoding |
| 2300063 | Maximum file size exceeded |
| 2300070 | Disk full or allocation exceeded |
| 2300073 | Remote file already exists |
| 2300077 | Problem with the SSL CA cert (path? access rights?) |
| 2300078 | Remote file not found |
| 2300094 | An authentication function returned an error |
| 2300999 | Unknown Other Error |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
>**错误码说明:**
>HTTP 错误码映射关系:2300000 + curl错误码。更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)。
**示例:**
......@@ -826,16 +697,10 @@ delete(callback: AsyncCallback\<void>): void
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300001 | Unsupported protocol |
| 2300003 | URL using bad/illegal format or missing URL |
| 2300005 | Couldn't resolve proxy name |
| 2300006 | Couldn't resolve host name |
| 2300007 | Couldn't connect to server |
| 2300008 | Weird server reply |
| 2300009 | Access denied to remote resource |
| 2300999 | Unknown Other Error |
| 2300999 | Unknown Other Error. |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
>**错误码说明:**
>HTTP 错误码映射关系:2300000 + curl错误码。更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)。
**示例:**
......@@ -867,10 +732,10 @@ delete(): Promise\<void>
| 错误码ID | 错误信息 |
|---------|-------------------------------------------------------|
| 401 | Parameter error. |
| 2300999 | Unknown Other Error |
| 2300999 | Unknown Other Error. |
更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)
>**错误码说明:**
>HTTP 错误码映射关系:2300000 + curl错误码。更多常用错误码,可参考:[curl错误码](https://curl.se/libcurl/c/libcurl-errors.html)。
**示例:**
......
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