Get RequestBody and ResponseBody at HandlerInterceptor

Question

Logic I have to implement is logging all requests with body served to DB.

So I decided to use: afterCompletion method of HandlerInterceptor. There are two parameters passed to this method HttpServletRequest and HttpServletResponse among the others.

Question is: how to get RequestBody and ResponseBody from supplied objects?

As far as I know at Controller we can use @RequestBody and @ResponseBody. Can I reuse them at HandlerInterceptor?

Answer 1

You can extend RequestBodyAdviceAdapter and implement the method afterBodyRead:

@ControllerAdvice
public MyRequestBodyAdviceAdapter extends RequestBodyAdviceAdapter {

    @Override
    public Object afterBodyRead(Object body, HttpInputMessage inputMessage, MethodParameter parameter,
            Type targetType, Class<? extends HttpMessageConverter<?>> converterType) {

        // write body -your input dto- to logs or database or whatever

        return body;
    }

}

The RequestBodyAdvice comes in pre setp the request chain before the HandlerInterceptor. it is exactly after the http request inputstream is converted to your object.

Answer 2

As far as I know, RequestBody and ResponseBody can be read only once. So you should not read them in an Interceptor. Here's some explanation.