POST with contentType application/json to Android AsyncHttpServer sets request body to null

Question

I have AsyncHttpServer working on my Android device. I have reqquest callback method for POST set like this:

server.post(pattern, new HttpServerRequestCallback() {
        @Override
        public void onRequest(AsyncHttpServerRequest request, 
                              AsyncHttpServerResponse response) {
            try {
                List<T> entityList = mapper.readValue(request.getBody().get().
                                     toString(), typeReference);
                for (T newEntity : entityList) {
                    newEntity.save();
                }
                response.code(200);
                response.end();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    });

where server is new AsyncHttpServer(), and mapper is new ObjectMapper()

I have breakpoint at line starting with List<T>, and I am trying to POST some data to server with cURL like this:

curl -H "Content-Type: application/json" -X POST -d '[{"_id":"767da7ae-
7826-4f67-853a-23f1d69b5f39","label":"L"}]' http://myserver:5000/test

For some reason, when I am posting with Content-Type set to application/json request.getBody() returns null, but if I change content type to text/plain body contains JSON data set with cURL as I would expect it to.

Does anyone knows why this happens, and how can I make it work with Content-Type: application/json?

Answer 1

I had the same problem when i was using Volley library. The problem have become solved by using :

"application/json; charset=utf-8";

as the body content type.