How can I intercept and send custom error messages with file upload when file size is exceeded. I have an annotated exception handler in the controller class, but the request does not come to the controller. The answer I came across on this link How to handle MaxUploadSizeExceededException suggests implementing HandlerExceptionResolver.
Have things changed in Spring 3.5 or is that still the only solution?
I ended up implementing HandlerExceptionResolver:
@Component public class ExceptionResolverImpl implements HandlerExceptionResolver {
private static final Logger LOG = LoggerFactory.getLogger(ExceptionResolverImpl.class);
@Override
public ModelAndView resolveException(HttpServletRequest request,
HttpServletResponse response, Object obj, Exception exc) {
if(exc instanceof MaxUploadSizeExceededException) {
response.setContentType("text/html");
response.setStatus(HttpStatus.REQUEST_ENTITY_TOO_LARGE.value());
try {
PrintWriter out = response.getWriter();
Long maxSizeInBytes = ((MaxUploadSizeExceededException) exc).getMaxUploadSize();
String message = "Maximum upload size of " + maxSizeInBytes + " Bytes per attachment exceeded";
//send json response
JSONObject json = new JSONObject();
json.put(REConstants.JSON_KEY_MESSAGE, message);
json.put(REConstants.JSON_KEY_SUCCESS, false);
String body = json.toString();
out.println("<html><body><textarea>" + body + "</textarea></body></html>");
return new ModelAndView();
}
catch (IOException e) {
LOG.error("Error writing to output stream", e);
}
}
//for default behaviour
return null;
}
}