Proxy Multipart Forms using Jersey RESTFul resource server and Client.

gistfile1.java

  /**
   * Proxies multipart forms to another server using Jersey for any path other than "proxy"
   */
  @POST
  @Path("/{path: (?!proxy).*}")
  @Consumes(MediaType.MULTIPART_FORM_DATA)
  public Response uploadFile(FormDataMultiPart multiPart, @Context HttpServletRequest httpRequest) throws Exception {

    ClientConfig config = new DefaultClientConfig();

    // builds a request with a given transaction id. Just uses a Jersey Client with the given config and target URL in the httpRequest
    Map<String, WebResource.Builder> proxyRequestToCfp = makeRequest(httpRequest, config, HttpMethod.POST);

    // transaction id
    String tid = proxyRequestToCfp.keySet().iterator().next();
    WebResource.Builder resource = proxyRequestToCfp.get(tid);

    resource.type(MediaType.MULTIPART_FORM_DATA + " ; charset=ISO-8859-1");

    // post the multipart form to the client.
    ClientResponse cfpResponseToProxy = resource.post(ClientResponse.class, multiPart);

    Response.ResponseBuilder clientResponse = makeResponse(tid, cfpResponseToProxy);
    return clientResponse.build();
  }