/* * Copyright 2002-2012 the original author or authors. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package org.springframework.web.client; import java.io.IOException; import java.io.InputStream; import java.nio.charset.Charset; import org.springframework.http.HttpStatus; import org.springframework.http.MediaType; import org.springframework.http.client.ClientHttpResponse; import org.springframework.util.FileCopyUtils; /** * Default implementation of the {@link ResponseErrorHandler} interface. * *
This error handler checks for the status code on the {@link ClientHttpResponse}: any * code with series {@link org.springframework.http.HttpStatus.Series#CLIENT_ERROR} or * {@link org.springframework.http.HttpStatus.Series#SERVER_ERROR} is considered to be an * error. This behavior can be changed by overriding the {@link #hasError(HttpStatus)} * method. * * @author Arjen Poutsma * @since 3.0 * @see RestTemplate#setErrorHandler */ public class DefaultResponseErrorHandler implements ResponseErrorHandler { /** * Delegates to {@link #hasError(HttpStatus)} with the response status code. */ public boolean hasError(ClientHttpResponse response) throws IOException { return hasError(response.getStatusCode()); } /** * Template method called from {@link #hasError(ClientHttpResponse)}. *
The default implementation checks if the given status code is
* {@link org.springframework.http.HttpStatus.Series#CLIENT_ERROR CLIENT_ERROR}
* or {@link org.springframework.http.HttpStatus.Series#SERVER_ERROR SERVER_ERROR}.
* Can be overridden in subclasses.
* @param statusCode the HTTP status code
* @return true
if the response has an error; false
otherwise
*/
protected boolean hasError(HttpStatus statusCode) {
return (statusCode.series() == HttpStatus.Series.CLIENT_ERROR ||
statusCode.series() == HttpStatus.Series.SERVER_ERROR);
}
/**
* This default implementation throws a {@link HttpClientErrorException} if the response status code
* is {@link org.springframework.http.HttpStatus.Series#CLIENT_ERROR}, a {@link HttpServerErrorException}
* if it is {@link org.springframework.http.HttpStatus.Series#SERVER_ERROR},
* and a {@link RestClientException} in other cases.
*/
public void handleError(ClientHttpResponse response) throws IOException {
HttpStatus statusCode = response.getStatusCode();
MediaType contentType = response.getHeaders().getContentType();
Charset charset = contentType != null ? contentType.getCharSet() : null;
byte[] body = getResponseBody(response);
switch (statusCode.series()) {
case CLIENT_ERROR:
throw new HttpClientErrorException(statusCode, response.getStatusText(), body, charset);
case SERVER_ERROR:
throw new HttpServerErrorException(statusCode, response.getStatusText(), body, charset);
default:
throw new RestClientException("Unknown status code [" + statusCode + "]");
}
}
private byte[] getResponseBody(ClientHttpResponse response) {
try {
InputStream responseBody = response.getBody();
if (responseBody != null) {
return FileCopyUtils.copyToByteArray(responseBody);
}
}
catch (IOException ex) {
// ignore
}
return new byte[0];
}
}