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

Recently I faced this issue and solved it slightly differently. With spring boot 1.3.5.RELEASE

The filter was implemented using the Spring class ContentCachingRequestWrapper. This wrapper has a method getContentAsByteArray() which can be invoked multiple times.

import org.springframework.web.util.ContentCachingRequestWrapper;
public class RequestBodyCachingFilter implements Filter {

    public void init(FilterConfig fc) throws ServletException {
    }

    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
        chain.doFilter(new ContentCachingRequestWrapper((HttpServletRequest)request), response);
    }

    public void destroy() {
    }
}

Added the filter to the chain

@Bean
public RequestBodyCachingFilter requestBodyCachingFilter() {
    log.debug("Registering Request Body Caching filter");
    return new RequestBodyCachingFilter();
}

In the Exception Handler.

@ControllerAdvice(annotations = RestController.class)
public class GlobalExceptionHandlingControllerAdvice {
    private ContentCachingRequestWrapper getUnderlyingCachingRequest(ServletRequest request) {
        if (ContentCachingRequestWrapper.class.isAssignableFrom(request.getClass())) {
            return (ContentCachingRequestWrapper) request;
        }
        if (request instanceof ServletRequestWrapper) {
            return getUnderlyingCachingRequest(((ServletRequestWrapper)request).getRequest());
        }
        return null;
    }

    @ResponseStatus(value = HttpStatus.INTERNAL_SERVER_ERROR)
    @ExceptionHandler(Throwable.class)
    public @ResponseBody Map conflict(Throwable exception, HttpServletRequest request) {
        ContentCachingRequestWrapper underlyingCachingRequest = getUnderlyingCachingRequest(request);
        String body = new String(underlyingCachingRequest.getContentAsByteArray(),Charsets.UTF_8);
        ....
    }
}