带有JSON的Volley Post-获取422状态代码

Question

I am trying to use Volley to send a JSON object to a Loopback application API which is using MongoDB. I can see that the data is being saved in the database successfully. But the Volley response always shows that the status code is 422 . Can someone point out what I am doing wrong?

This is the error message:

BasicNetwork.performRequest: Unexpected response code 422 for http://localhost:3001/api/Persons

This is the JSON I am trying to send:

{
  "map_coordinates": {
    "lat": xxxxxx,
    "lng": xxxxxxx
  },
  "first_name": "xxxxx",
  "middle_name": "",
  "family_name": "xxxxxx",
  "gender": "xxxxxx",
  "role": "xxxxxx",
  "dob": "2017-09-28T05:51:40.836Z",
  "picture_of_person": "",
  "username": "ajxxxx7@gmail.com",
  "deviceToken": "xxxxxxxx",
  "portal_address": "xxxxx",
  "email": "ajxxxxx7@gmail.com",
  "password": "xxxxxxx",
  "vcode": 562991,
  "mobile": "+91xxxxxxxx"
}

I do not think that there is a problem with the JSON because, if I POST the same object from the Loopback explorer then the request goes through successfully and returns status code 200.

This is the code I am using to send the JSON request.

public void postJsonRequest(String url, JSONObject data, final Callback<JSONObject, VolleyError> callback) {
    JsonObjectRequest objectRequest = new JsonObjectRequest(Request.Method.POST,
            url, data, new Response.Listener<JSONObject>() {
        @Override
        public void onResponse(JSONObject response) {
            callback.onSuccess(response);
        }
    }, new Response.ErrorListener() {
        @Override
        public void onErrorResponse(VolleyError error) {
            callback.onFailure(error);
        }
    });
    makeJsonRequest(objectRequest);
}

private void makeJsonRequest(JsonObjectRequest request) {
    RequestQueue queue = Volley.newRequestQueue(EngageMyTime.getInstance().getEMTContext());
    queue.add(request);
}

Any help/idea would be appreciated.

Answer 1

Try to set the default charset UTF-8 on server side and encode in UTF-8 the json data before send

In android with

URLEncoder.encode(string,"UTF-8");

Answer 2

What format are you used in response? İf you can't use JSON,You may see this error. Because postJSONResponse use JSONObject in parsing. Something like this. You can write custom request or change your response type to JSON. Example of custom request is:

public class SignUpRequest extends Request<String> {
    private Map<String, String> mParams;
    public SignUpRequest(String url, Response.ErrorListener listener) {
        super(url, listener);
    }

    public SignUpRequest(int method, String url,String email,String userName,String password, Response.ErrorListener listener) {
        super(method, url, listener);
        mParams=new HashMap<>();
        mParams.put("username",userName);
        mParams.put("email",email);
        mParams.put("password",password);
    }




    @Override
    protected void deliverResponse(String response) {
        Log.e("Response",response);
    }

    @Override
    protected Map<String, String> getParams() throws AuthFailureError {

        return mParams;
    }

    @Override
    protected Response<String> parseNetworkResponse(NetworkResponse response) {
        String data=new String(response.data);
        return Response.success(data+" "+response.statusCode,
                HttpHeaderParser.parseCacheHeaders(response));
    }
}