docs: connector example

docs-en/05-develop/01-connect/01-python.md

@@ -34,14 +34,16 @@ Run this command in your terminal to save TDengine cloud token as variables:
 
 ```bash
 export TDENGINE_CLOUD_TOKEN=<token>
+export TDENGINE_CLOUD_URL=<url>
 ```
 
-You can also set environment variable in IDE. For example, you can set environmental variables in Pycharm's run configurations menu.
+Alternatively, set environment variables in your IDE's run configurations.
 
 
 <!-- exclude -->
 :::note
-To obtain your personal cloud token, please log in [TDengine Cloud](https://cloud.tdengine.com).
+Replace  <token\> and <url\> with cloud token and URL.
+To obtain the value of cloud token and URL, please log in [TDengine Cloud](https://cloud.tdengine.com) and click "Connector" and then select "Python".
 
 :::
 <!-- exclude-end -->
@@ -55,7 +57,7 @@ import taosrest
 import os
 
 token = os.environ["TDENGINE_CLOUD_TOKEN"]
-url = "https://cloud.tdengine.com"
+url = os.environ["TDENGINE_ClOUD_URL"]
 
 conn = taosrest.connect(url=url, token=token)
 ```

docs-en/05-develop/01-connect/02-java.md

@@ -8,10 +8,11 @@ import TabItem from '@theme/TabItem';
 
 ## Add Dependency
 
+
 <Tabs>
 <TabItem value="maven" label="Maven">
 
-```xml
+```xml title="pom.xml"
 <dependency>
   <groupId>com.taosdata.jdbc</groupId>
   <artifactId>taos-jdbcdriver</artifactId>
@@ -22,7 +23,7 @@ import TabItem from '@theme/TabItem';
 </TabItem>
 <TabItem value="gradel" label="Gradle">
 
-```groovy
+```groovy title="build.gradle"
 dependencies {
   implementation 'com.taosdata.jdbc:taos-jdbcdriver:2.0.39'
 }
@@ -33,25 +34,25 @@ dependencies {
 
 ## Config
 
-Run this command in your terminal to save TDengine cloud token as variables:
-
+Run this command in your terminal to save the JDBC URL as variable:
 
 ```bash
-export TDENGINE_CLOUD_TOKEN=<token>
+export TDENGINE_JDBC_URL=<jdbcURL>
 ```
 
+Alternatively, set environment variable in your IDE's run configurations.
 
-You can also set environment variable in IDE. For example, you can set environmental variables in IDEA's run configurations menu.
 
 <!-- exclude -->
 :::note
-To obtain your personal cloud token, please log in [TDengine Cloud](https://cloud.tdengine.com).
+Replace  <jdbcURL\> with real JDBC URL, it will seems like: `jdbc:TAOS-RS://example.com?usessl=true&token=xxxx`.
 
+To obtain the value of JDBC URL, please log in [TDengine Cloud](https://cloud.tdengine.com) and click "Connector" and then select "Java".
 :::
 <!-- exclude-end -->
 ## Connect
 
-Code bellow get token from environment variables first and then create a `Connection` object, witch is a standard JDBC Connection object.
+Code bellow get JDBC URL from environment variables first and then create a `Connection` object, witch is a standard JDBC Connection object.
 
 ```java
 import java.sql.Connection;
@@ -61,10 +62,8 @@ import java.sql.SQLException;
 
 public class ConnectCloudExample {
     public static void main(String[] args) throws SQLException {
-        String token = System.getenv("TDENGINE_CLOUD_TOKEN");
-        String jdbcUrl = "jdbc:TAOS-RS://cloud.taosdata.com:8085?usessl=true&token=" + token;
+        String jdbcUrl = System.getenv("TDENGINE_JDBC_URL");
         Connection conn = DriverManager.getConnection(jdbcUrl);
-        System.out.println("Connected");
         conn.close();
     }
 }

docs-en/05-develop/01-connect/03-go.md

@@ -7,7 +7,7 @@ title: Connect with Go Connector
 
 add `driver-go` dependency in `go.mod` .
 
-``` title="go.mod"
+```go-mod title="go.mod"
 module goexample
 
 go 1.17
@@ -15,14 +15,24 @@ go 1.17
 require github.com/taosdata/driver-go/v2 develop
 ```
 
+Then run command `go mod tidy` in your terminal to download dependencies.
+
 ## Config
 
-Run this command in your terminal to save TDengine cloud token as variables:
+Run this command in your terminal to save DSN(data source name) as variable:
 
 ```bash
-export TDENGINE_CLOUD_TOKEN=<token>
+export TDENGINE_GO_DSN=<goDSN>
 ```
 
+<!-- exclude -->
+:::note
+Replace <goDSN\> with the real value, the format should be `https(<cloud_host>)/?token=<token>`.
+To obtain the value of `goDSN`, please log in [TDengine Cloud](https://cloud.tdengine.com) and click "Connector" and then select "Go".
+
+:::
+<!-- exclude-end -->
+
 ## Connect
 
 ```go
@@ -37,9 +47,8 @@ import (
 )
 
 func main() {
-    token := os.Getenv("TDENGINE_CLOUD_TOKEN")
-    taosDSN := "http(cloud.tdengine.com:8085)/?token=" + token
-    taos, err := sql.Open("taosRestful", taosDSN)
+    dsn := os.Getenv("TDENGINE_CLOUD_TOKEN")
+    taos, err := sql.Open("taosRestful", dsn)
     if err != nil {
         fmt.Println("failed to connect TDengine, err:", err)
         return

docs-en/05-develop/01-connect/04-rust.md

@@ -5,9 +5,11 @@ title: Connect with Rust Connector
 
 ## Add Dependency
 
+Add dependency to `Cargo.toml`. 
 
-``` title="Cargo.toml"
-
+```toml title="Cargo.toml"
+[dependencies]
+libtaos = { version = "0.4.2"}
 ```
 
 ## Config
@@ -16,16 +18,31 @@ Run this command in your terminal to save TDengine cloud token as variables:
 
 ```bash
 export TDENGINE_CLOUD_TOKEN=<token>
+export TDENGINE_CLOUD_URL=<url>
 ```
 
+<!-- exclude -->
+:::note
+Replace  <token\> and <url\> with cloud token and URL.
+To obtain the value of cloud token and URL, please log in [TDengine Cloud](https://cloud.tdengine.com) and click "Connector" and then select "Rust".
+
+:::
+<!-- exclude-end -->
+
 ## Connect
 
-```go
+Copy following code to `main.rs`.
+
+```rust title="main.rs"
 use libtaos::*;
 
 fn main() {
     let token =  std::env::var("TDENGINE_CLOUD_TOKEN").unwrap();
-    let dsn = format!("https://cloud.tdengine.com?token={}", token);
+    let url = std::env::var("TDENGINE_CLOUD_URL").unwrap();
+    let dsn = url + "?token=" + &token;
     let taos = Taos::from_dsn(dsn)?;
+    println!("connected");
 }
 ```
+
+Then you can execute `cargo run` to test the connection.
\ No newline at end of file

docs-en/05-develop/01-connect/05-node.md

@@ -5,28 +5,37 @@ title: Connect with Node.js Connector
 
 ## Install Connector
 
-
-
+```
+npm i td2.0-rest-connector
+```
 ## Config
 
 Run this command in your terminal to save TDengine cloud token as variables:
 
 ```bash
 export TDENGINE_CLOUD_TOKEN=<token>
+export TDENGINE_CLOUD_URL=<url>
 ```
 
+<!-- exclude -->
+:::note
+Replace  <token\> and <url\> with cloud token and URL.
+To obtain the value of cloud token and URL, please log in [TDengine Cloud](https://cloud.tdengine.com) and click "Connector" and then select "Node.js".
 
-## Connect
+:::
+<!-- exclude-end -->
 
+## Connect
 
-```python
+```javascript
 const { options, connect } = require("td2.0-rest-connector");
 
 async function test() {
-  options.url = "https://cloud.tdengine.com";
+  options.url = process.env.TDENGINE_CLOUD_URL;
   options.token = process.env.TDENGINE_CLOUD_TOKEN;
   let conn = connect(options);
 }
+
 test();
 ```