Spring RestTemplate could set the errorHandler, which has the methods for handling errors. I have an error handler like this
try (BufferedReader buffer = new BufferedReader(new InputStreamReader(clientHttpResponse.getBody()))) {
final String response = buffer.lines().collect(Collectors.joining("\n"));
System.out.println(response);
}
but it always tell me that the input stream is close. Is this a bug or do I missing something?
The default error handler of RestTemplate DefaultResponseErrorHandler already reads the response body and sets it in the HttpStatusCodeException object that it throws.
try {
restTemplate.getForObject("http://...", String.class);
} catch (HttpStatusCodeException e) {
System.out.println("Received error: " + e.getResponseBodyAsString());
}
If you want to always log the response body on error without requiring to catch HttpStatusCodeException, you can extend the default error handler.
public static class LoggingErrorHandler extends DefaultResponseErrorHandler {
@Override
public void handleError(ClientHttpResponse response) throws IOException {
try {
super.handleError(response);
} catch (HttpStatusCodeException e) {
System.out.println("Error response body is " + e.getResponseBodyAsString());
throw e;
}
}
}
Use the above error handler while instantiating rest template.
RestTemplate restTemplate = new RestTemplate();
restTemplate.setErrorHandler(new LoggingErrorHandler());
String response = restTemplate.getForObject("http://...", String.class);
