/** * This function will try login user in using hashmap as input. return result will be json web * token for that user. */ public static String performLogin(HashMap<String, String> postDataParams) { String requestURL = "http://blooming-stream-2220.herokuapp.com/api/login"; URL url; String response = ""; try { url = new URL(requestURL); HttpURLConnection conn = (HttpURLConnection) url.openConnection(); conn.setReadTimeout(15000); conn.setConnectTimeout(15000); conn.setRequestMethod("POST"); conn.setDoInput(true); conn.setDoOutput(true); OutputStream os = conn.getOutputStream(); BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(os, "UTF-8")); writer.write(HttpRequester.getPostDataString(postDataParams)); writer.flush(); writer.close(); os.close(); int responseCode = conn.getResponseCode(); Log.d("tr.edu.code", responseCode + ""); if (responseCode == HttpsURLConnection.HTTP_OK) { String line; BufferedReader br = new BufferedReader(new InputStreamReader(conn.getInputStream())); while ((line = br.readLine()) != null) { response += line; } } else { response = ""; } } catch (Exception e) { Log.d("tr.edu.code", e.getMessage()); e.printStackTrace(); } String token = ""; try { JSONObject jsonObject = new JSONObject(response); token = jsonObject.getString("token"); } catch (JSONException e) { Log.e("tr.edu", "Error parsing Json"); } return token; }