CODEWITHSUNDEEP
androidandroid-volley
abdfahim
abdfahim

Reputation: 2553

Volley Server Error with null Network response

Every time I try to use POST method with Volley, I get sever error. I get null value in getCause, and some default value in getNetworkResponse.toString().

If I use GET method, this works fine (I get response from my url).

Can anybody help what can I do?

    Map<String, String> jsonParams = new HashMap<String, String>();
    jsonParams.put("teststr", "abd");

    RequestQueue requestQueue = VolleySingleton.getInstance().getRequestQueue();
    JsonObjectRequest request = new JsonObjectRequest(
            Request.Method.POST,
            url,
            new JSONObject(jsonParams),
            new Response.Listener<JSONObject>() {
                @Override
                public void onResponse(JSONObject response) {

                    try {
                        Toast.makeText(getApplicationContext(), "Success"+response.toString(), Toast.LENGTH_LONG).show();
                    }catch(Exception e){
                        Toast.makeText(getApplicationContext(), "JSON ERROR", Toast.LENGTH_LONG).show();
                    }
                }
            },
            new Response.ErrorListener() {
                @Override
                public void onErrorResponse(VolleyError error) {
                    Log.d("abd", "Error: " + error
                                    + ">>" + error.networkResponse.statusCode
                                    + ">>" + error.networkResponse.data
                                    + ">>" + error.getCause()
                                    + ">>" + error.getMessage());
                }
            }) {

                @Override
                protected Map<String,String> getParams() {
                    HashMap<String, String> params = new HashMap<String, String>();
                    params.put("key", "value");
                    return params;
                }

                @Override
                public Map<String, String> getHeaders() throws AuthFailureError {
                    HashMap<String, String> headers = new HashMap<String, String>();
                    headers.put("Content-Type", "application/json; charset=utf-8");
                    return headers;
                }
    };
    requestQueue.add(request);

Error Log:

Error: Error: com.android.volley.ServerError>>404>>[B@42b1e0d0>>null>>null

UPDATE: networkResponse.statusCode comes as 404, though the url is accessible (and return data if I just use GET method). If I remove header part in POST method, still the same.

the url:

<?php
    $response = array();

    $jsonString = file_get_contents('php://input');
    $jsonObj = json_decode($jsonString, true);

    if(!isset($jsonObj['teststr'])){
        $response["msg"] = "No data.";
    }else{
        $response["msg"] = "Success: ".$jsonObj['teststr'];
    }
    echo json_encode($response);
?>

Upvotes: 11

Views: 53059

Answers (8)

Paulius Nyoumi
Paulius Nyoumi

Reputation: 189

try to increase timeout. i had the same issue and the request timeout was the problem.

Upvotes: -1

Kenneth Tse
Kenneth Tse

Reputation: 36

In my case, the answer is retry policy setting. I put 30 seconds the timeout value, it should be 30000, not 30.

Upvotes: 0

Sonu Sourav
Sonu Sourav

Reputation: 3504

I tried to display the response as a String and the error went off.

Use response.toString() wherever you want to display the error or use it.

Upvotes: 0

hadi.ghasemian
hadi.ghasemian

Reputation: 157

problem is your Queue. change your volley code to this:

 RequestQueue queue = Volley.newRequestQueue(this);
 String URL = EndPoints.BASE_URL + "/call";
 StringRequest request = new StringRequest(Request.Method.POST, URL,
  new Response.Listener<String>()
  {
    @Override
    public void onResponse(String response) {

      Log.d("onResponse", response);

    }
  },
  new Response.ErrorListener()
  {
    @Override
    public void onErrorResponse(VolleyError error) {

      NetworkResponse response = error.networkResponse;
      String errorMsg = "";
      if(response != null && response.data != null){
        String errorString = new String(response.data);
        Log.i("log error", errorString);
      }
    }
  }
) {
  @Override
  protected Map<String, String> getParams()
  {

    Map<String, String> params = new HashMap<String, String>();
    params.put("key_1","value_1");
    params.put("key_2", "value_2");
    Log.i("sending ", params.toString());

    return params;
  }

};


 // Add the realibility on the connection.
 request.setRetryPolicy(new DefaultRetryPolicy(10000, 1, 1.0f));

  // Start the request immediately
    queue.add(request);

and your php (laravel) code to this:

    $response['success'] = true;
    $response['user']['tell'] = $user->tell;
    $response['user']['code'] = $user->code;
    $response['user']['time'] = $time;
    $response['user']['register_state'] = '1'
    return response()->json($response, 200);

Upvotes: 8

S.Aslpour
S.Aslpour

Reputation: 86

maybe it's related to your operator...

I have the same issue sending JasonObject with Volley.

I tested my app on 9-10 devices with two different operators.

The request on one operator returns an Error with everything null or blank data in it, on the other one everything works fine and I get my Response from API successfully.

I have no idea what do operators do that causes this problem... Maybe they use some kind of firewall that blocks sending JsonObject.

Upvotes: 0

Bamz3r
Bamz3r

Reputation: 177

Add this code before add to queue

request.setRetryPolicy(new DefaultRetryPolicy(0, -1, DefaultRetryPolicy.DEFAULT_BACKOFF_MULT));

sometimes, request is timeout before your php executed completely. so try this code. maybe can help

Upvotes: 0

Kay Wu
Kay Wu

Reputation: 757

First, try to make sure your server works well. You can use Postman(chrome plug-in) or any other way to send a post request to the url and see what it responses.

After make sure there's no problem with your server, let us solve the problem with volley.

There's some problem with JsonObjectRequest when you use POST method. like this Volley JsonObjectRequest Post request not working.

I suggest you use StringRequest first and overwrite the getParams method like you did before. After you survive this task, you can try to write your own request, not very difficult but very useful.

I also suggest add request.setShouldCache(false) before requestQueue.add(request);. By default, volley saves the response in its cache and this behavior may cause some strange problem.

Upvotes: 6

shoxive
shoxive

Reputation: 1

Well,I think you can first print the responseCode in your logcat

Upvotes: 0

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