I am trying to log the request-response pairs for every request. The problem is that when the response code is 401
, ClientHttpResponse.getBody()
throws a ResourceAccessException and i cannot read the response body.
This is the RestTemplate configuration
RestTemplate restTemplate = new RestTemplate();
// Added this requestFactory to make response object readable more than once.
ClientHttpRequestFactory requestFactory =
new BufferingClientHttpRequestFactory(new SimpleClientHttpRequestFactory());
restTemplate.setRequestFactory(requestFactory);
restTemplate.getInterceptors().add(new RequestLoggingInterceptor(vCloudRequest.getAction(),httpHeaders));
restTemplate.setErrorHandler(new RequestErrorHandler());
return restTemplate;
The last line of the interceptor below throws the following exception.
How can i resolve this problem?
org.springframework.web.client.ResourceAccessException: I/O error on POST request for "https://example.com/api/sessions": Server returned HTTP response code: 401 for URL: https://example.com/api/sessions; nested exception is java.io.IOException: Server returned HTTP response code: 401 for URL: https://example.com.11/api/sessions
This is the related part of the interceptor.
@Override
public ClientHttpResponse intercept(HttpRequest request, byte[] body, ClientHttpRequestExecution execution) throws IOException {
ClientHttpResponse response = execution.execute(request, body);
String requestString = new String(body);
// Calling this method because when we make a POST or PUT request and get an error
// response.getBody() throws IOException. But if we call response.getStatusCode() it works fine.
// I don't know the reason.
// I asked a question on stackoverflow
// https://stackoverflow.com/questions/47429978/resttemplate-response-getbody-throws-exception-on-4-and-5-errors-for-put-and
response.getStatusCode();
String responseString = new String(ByteStreams.toByteArray(response.getBody()), Charset.forName("UTF-8"));
...
}
This is the custom error handler
public class RequestErrorHandler implements ResponseErrorHandler {
@Override
public boolean hasError(ClientHttpResponse response) throws IOException {
if (!response.getStatusCode().is2xxSuccessful()) {
return true;
}
return false;
}
@Override
public void handleError(ClientHttpResponse response) throws IOException {
JAXBElement<ErrorType> root = null;
try {
JAXBContext jaxbContext = JAXBContext.newInstance(ErrorType.class);
Unmarshaller jaxbUnmarshaller = jaxbContext.createUnmarshaller();
root = jaxbUnmarshaller.unmarshal(new StreamSource(
response.getBody()), ErrorType.class);
} catch (JAXBException e) {
throw new IOException("XML converting error. Cannot convert response to ErrorType");
}
ErrorType error = root.getValue();
throw new VcloudException(error);
}
}
Use HttpComponentsClientHttpRequestFactory instead of SimpleClientHttpRequestFactory.
Also add dependency to 'org.apache.httpcomponents:httpclient.
HttpComponentsClientHttpRequestFactory ccan read body when status is 401.
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