CODEWITHSUNDEEP
javaandroidjsongoogle-cloud-messaging
Ryan Gray
Ryan Gray

Reputation: 824

Android HttpsURLConnection and JSON for new GCM

I'm overhauling certain parts of my app to use the new GCM service to replace C2DM. I simply want to create the JSON request from a Java program for testing and then read the response. As of right now I can't find ANY formatting issues with my JSON request and the google server always return code 400, which indicates a problem with my JSON. http://developer.android.com/guide/google/gcm/gcm.html#server

JSONObject obj = new JSONObject();
    obj.put("collapse_key", "collapse key");
    JSONObject data = new JSONObject();
    data.put("info1", "info_1");
    data.put("info2", "info 2");
    data.put("info3", "info_3");
    obj.put("data", data);
    JSONArray ids = new JSONArray();
    ids.add(REG_ID);
    obj.put("registration_ids", ids);
    System.out.println(obj.toJSONString());

I print my request to the eclipse console to check it's formatting

byte[] postData = obj.toJSONString().getBytes();
    try{
    URL url = new URL("https://android.googleapis.com/gcm/send");
    HttpsURLConnection.setDefaultHostnameVerifier(new JServerHostnameVerifier());
    HttpsURLConnection conn = (HttpsURLConnection) url.openConnection();
    conn.setDoOutput(true);
    conn.setDoInput(true);
    conn.setUseCaches(false);

    conn.setRequestMethod("POST");
    conn.setRequestProperty("Content-Type", "application/json");

conn.setRequestProperty("Authorization", "key=" + API_KEY);
    System.out.println(conn.toString());
    OutputStream out = conn.getOutputStream();
              // exception thrown right here. no InputStream to get
    InputStream in = conn.getInputStream();
    byte[] response = null;
    out.write(postData);
    out.close();
    in.read(response);
    JSONParser parser = new JSONParser();
    String temp = new String(response);
    JSONObject temp1 = (JSONObject) parser.parse(temp);
    System.out.println(temp1.toJSONString());
    int responseCode = conn.getResponseCode();
     System.out.println(responseCode + "");
    } catch(Exception e){
        System.out.println("Exception thrown\n"+ e.getMessage());
    }


}

I'm sure my API key is correct as that would result in error 401, so says the google documentation. This is my first time doing JSON but it's easy to understand because of its simplicity. Anyone have any ideas on why I always receive code 400?

update: I've tested the google server example classes provided with gcm so the problem MUST be with my code.

{"collapse_key":"new-test-notification","data":{"info1":"info_1","info3":"info_3","info2":"info 2"},"registration_ids":["APA91bG3bmCSltzQYl_yOcjG0LPcR1Qemwg7osYJxImpSuWZftmmIjUGH_CSDG3mswKuV3AAb8GSX7HChOKGAYHz1A_spJus5mXFtfOrK0fouBD7QBpKnfc_ly0t3S8vSYWRjuGxtXrt"]}

Upvotes: 1

Views: 6371

Answers (3)

Ryan Gray
Ryan Gray

Reputation: 824

I solved it using a different approach so it must have been my original implementation.

List<NameValuePair> list = new ArrayList<NameValuePair>();
        list.add(new BasicNameValuePair("username",username));
        list.add(new BasicNameValuePair("deviceId",regId));
        list.add(new BasicNameValuePair("deviceType","AndroidPhone"));
        DefaultHttpClient client = new DefaultHttpClient();
        HttpPost post = new HttpPost("example.url.com");
        post.setEntity(new UrlEncodedFormEntity(list));
        ResponseHandler<String> handler = new BasicResponseHandler();
        HttpResponse response = client.execute(post);
        String responseString = handler.handleResponse(response);
        JSONObject jsonResponse = new JSONObject(responseString);

Upvotes: 1

Rob Starling
Rob Starling

Reputation: 3908

Try to reproduce the error using curl or another command-line tool so we can eliminate the possibility that there's a bug in your java that we're all missing.

Upvotes: 0

Klaasvaak
Klaasvaak

Reputation: 5644

I'm reading here that you should use your 'Key for browser apps' GCM with PHP (Google Cloud Messaging) (in comments)

Upvotes: 0

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