How to fix Jersey POST request parameters warning?

Question

I\'m building a very simple REST API using Jersey, and I\'ve got a warning in my log files that I\'m not sure about.

WARNING: A servlet POST request,

Answer 1

Finally got rid of this by making sure I had Content-Type: application/json in my request headers (obviously, on the client side)

Answer 2

For me the warning was showing for POST application/x-www-form-urlencoded. And I am using Spring Boot which has an HiddenHttpMethodFilter that does a getParameter before anything else... So I ended up doing this nasty override:

@Bean
    public HiddenHttpMethodFilter hiddenHttpMethodFilter() {
        return new HiddenHttpMethodFilter() {
            @Override
            protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response,
                    FilterChain filterChain) throws ServletException, IOException {
                if ("POST".equals(request.getMethod())
                        && request.getContentType().equals(MediaType.APPLICATION_FORM_URLENCODED_VALUE)) {
                    filterChain.doFilter(request, response);
                } else {
                    super.doFilterInternal(request, response, filterChain);
                }
            }
        };
    }

Answer 3

In my case I've fixed this error when I've changed the Object Date to String in the method.

Error:

@POST
@Path("/myPath")
@Produces(MediaType.APPLICATION_JSON)
public List<MyObject> myMethod(@FormParam("StartDate") Date date) throws Exception {

Fixed

@POST
@Path("/myPath")
@Produces(MediaType.APPLICATION_JSON)
public List<MyObject> myMethod(@FormParam("StartDate") String date) throws Exception {