Reading httprequest content from spring exception handler

Question

I Am using Spring\'s @ExceptionHandler annotation to catch exceptions in my controllers.

Some requests hold POST data as plain XML string written to the req

Answer 1

I had the same problem and solved it with HttpServletRequestWrapper as described above and it worked great. But then, I found another solution with extending HttpMessageConverter, in my case that was MappingJackson2HttpMessageConverter.

public class CustomJsonHttpMessageConverter extends  MappingJackson2HttpMessageConverter{

    public static final String REQUEST_BODY_ATTRIBUTE_NAME = "key.to.requestBody";


    @Override
    public Object read(Type type, Class contextClass, final HttpInputMessage inputMessage) throws IOException, HttpMessageNotReadableException {

        final ByteArrayOutputStream writerStream = new ByteArrayOutputStream();

        HttpInputMessage message = new HttpInputMessage() {
            @Override
            public HttpHeaders getHeaders() {
                return inputMessage.getHeaders();
            }
            @Override
            public InputStream getBody() throws IOException {
                return new TeeInputStream(inputMessage.getBody(), writerStream);
            }
        };
                    RequestContextHolder.getRequestAttributes().setAttribute(REQUEST_BODY_ATTRIBUTE_NAME, writerStream, RequestAttributes.SCOPE_REQUEST);

        return super.read(type, contextClass, message);
    }

}

com.sun.xml.internal.messaging.saaj.util.TeeInputStream is used.

In spring mvc config

In @ExceptionHandler method

@ExceptionHandler(Exception.class)
public ResponseEntity handleException(Exception e, HttpServletRequest httpRequest) {

    RestError error = new RestError();
    error.setErrorCode(ErrorCodes.UNKNOWN_ERROR.getErrorCode());
    error.setDescription(ErrorCodes.UNKNOWN_ERROR.getDescription());
    error.setDescription(e.getMessage());


    logRestException(httpRequest, e);

    ResponseEntity responseEntity = new ResponseEntity(error,HttpStatus.INTERNAL_SERVER_ERROR);
    return responseEntity;
}

private void logRestException(HttpServletRequest request, Exception ex) {
    StringWriter sb = new StringWriter();
    sb.append("Rest Error \n");
    sb.append("\nRequest Path");
    sb.append("\n----------------------------------------------------------------\n");
    sb.append(request.getRequestURL());
    sb.append("\n----------------------------------------------------------------\n");
Object requestBody = request.getAttribute(CustomJsonHttpMessageConverter.REQUEST_BODY_ATTRIBUTE_NAME);

    if(requestBody != null) { 
        sb.append("\nRequest Body\n");
        sb.append("----------------------------------------------------------------\n");
        sb.append(requestBody.toString());

        sb.append("\n----------------------------------------------------------------\n");
    }

    LOG.error(sb.toString());
}

I hope it helps :)