Org.json.JSONException: End of character input 0

Question

I try to upload a video to the server, but whenever I try to upload a response, null null is displayed, and org.json.JSONException is displayed in logcat: End of input with character 0 of, instead of my response status: success msg: video uploaded .. can someone tell me what is my mistake?

public class VideoUpload extends Activity{ MediaController mc; private static int SELECT_PICTURE = 1; private String selectedImagePath=""; TextView messageText; Button uploadButton; int serverResponseCode = 0; ProgressDialog dialog = null; private static final String TAG_SUCCESS = "status"; private static final String TAG_MSG = "msg"; String imgs; String btns; String upLoadServerUri = null; ThreadPolicy th = new ThreadPolicy.Builder().permitAll().build(); final String uploadFilePath = Environment.getExternalStorageDirectory().getPath(); private Button buttonLoadImage; private VideoView img; private String User_ID; private String sta; private String msg; private HttpURLConnection conn = null; private String result=""; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.layout_video); StrictMode.setThreadPolicy(th); User_ID=this.getIntent().getStringExtra("id"); System.out.println("photo upload user id"+User_ID); img = (VideoView)findViewById(R.id.imgViewvid); mc = new MediaController(this); mc.setAnchorView(img); buttonLoadImage = (Button) findViewById(R.id.buttonLoadvid); buttonLoadImage.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View arg0) { Intent intent = new Intent(); intent.setType("video/*"); intent.setAction(Intent.ACTION_GET_CONTENT); startActivityForResult(Intent.createChooser(intent,"Select Picture"), SELECT_PICTURE); } }); uploadButton = (Button)findViewById(R.id.uploadButtonvid); messageText = (TextView)findViewById(R.id.messageTextvid); uploadButton.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { dialog = ProgressDialog.show(VideoUpload.this, "", "Uploading file...", true); new Thread(new Runnable() { public void run() { runOnUiThread(new Runnable() { public void run() { messageText.setText("uploading started....."); } }); uploadFile(selectedImagePath); } }).start(); } }); } @Override public void onActivityResult(int requestCode, int resultCode, Intent data) { if (resultCode == RESULT_OK) { if (requestCode == SELECT_PICTURE) { Uri mVideoURI = data.getData(); selectedImagePath = getPath(mVideoURI); messageText.setText(selectedImagePath); System.out.println(requestCode); System.out.println("Image Path : " + selectedImagePath); img.setVideoURI(mVideoURI); } } } @SuppressWarnings("deprecation") public String getPath(Uri uri) { String[] projection = { MediaStore.Images.Media.DATA }; Cursor cursor = managedQuery(uri, projection, null, null, null); int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA); cursor.moveToFirst(); return cursor.getString(column_index); } public int uploadFile(String sourceFileUri) { DataOutputStream dos = null; String lineEnd = "\r\n"; String twoHyphens = "--"; String boundary = "*****"; int bytesRead, bytesAvailable, bufferSize; byte[] buffer; int maxBufferSize = 1 * 1024 * 1024; File sourceFile = new File(sourceFileUri); if (!sourceFile.isFile()) { dialog.dismiss(); Log.e("uploadFile", "Source File not exist :" + selectedImagePath); runOnUiThread(new Runnable() { public void run() { messageText.setText("Source File not exist :" + selectedImagePath); } }); return 0; } else { try { btns=uploadButton.getTag().toString(); System.out.println(btns); String fileName = sourceFileUri; File f = new File(selectedImagePath); imgs= f.getName(); System.out.println(imgs); upLoadServerUri = "http://mywebsitename.com/webservice/addvideo?version=apps&user_login_id="+User_ID+"&video_1="+imgs+"&action="+btns; FileInputStream fileInputStream = new FileInputStream(sourceFile); URL url = new URL(upLoadServerUri); System.out.println(url); conn = (HttpURLConnection) url.openConnection(); conn.setDoInput(true); // Allow Inputs conn.setDoOutput(true); // Allow Outputs conn.setUseCaches(false); // Don't use a Cached Copy conn.setRequestMethod("POST"); conn.setRequestProperty("Connection", "Keep-Alive"); conn.setRequestProperty("ENCTYPE", "multipart/form-data"); conn.setRequestProperty("Content-Type", "multipart/form-data;boundary=" + boundary); conn.setRequestProperty("video_1", imgs); conn.setRequestProperty("user_login_id", User_ID); conn.setRequestProperty("action", btns); conn.setRequestProperty("version", "apps"); dos = new DataOutputStream(conn.getOutputStream()); dos.writeBytes(twoHyphens + boundary + lineEnd); dos.writeBytes("Content-Disposition: form-data; name=\"type\"" + lineEnd); dos.writeBytes(lineEnd); // assign value dos.writeBytes("version=apps"); dos.writeBytes(lineEnd); dos.writeBytes(twoHyphens + boundary + lineEnd); dos.writeBytes("user_login_id="+User_ID); dos.writeBytes(lineEnd); dos.writeBytes(twoHyphens + boundary + lineEnd); dos.writeBytes("action="+btns); dos.writeBytes(lineEnd); dos.writeBytes(twoHyphens + boundary + lineEnd); // send image dos.writeBytes(twoHyphens + boundary + lineEnd); dos.writeBytes("Content-Disposition: form-data; name='video_1';filename='" + imgs + "'" + lineEnd); dos.writeBytes(lineEnd); // create a buffer of maximum size bytesAvailable = fileInputStream.available(); bufferSize = Math.min(bytesAvailable, maxBufferSize); buffer = new byte[bufferSize]; // read file and write it into form... bytesRead = fileInputStream.read(buffer, 0, bufferSize); while (bytesRead > 0) { dos.write(buffer, 0, bufferSize); bytesAvailable = fileInputStream.available(); bufferSize = Math.min(bytesAvailable, maxBufferSize); bytesRead = fileInputStream.read(buffer, 0, bufferSize); } // send multipart form data necesssary after file data... dos.writeBytes(lineEnd); dos.writeBytes(twoHyphens + boundary + twoHyphens + lineEnd); // Responses from the server (code and message) serverResponseCode = conn.getResponseCode(); String serverResponseMessage = conn.getResponseMessage(); Log.i("uploadFile", "HTTP Response is : " + serverResponseMessage + ": " + serverResponseCode); if(serverResponseCode == 200){ runOnUiThread(new Runnable() { @SuppressWarnings("deprecation") public void run() { try { DataInputStream dataIn = new DataInputStream(conn.getInputStream()); String inputLine; while ((inputLine = dataIn.readLine()) != null) { result += inputLine; System.out.println("Result : " + result); } JSONObject jobj = new JSONObject(result); sta = jobj.getString("status"); msg = jobj.getString("msg"); System.out.println(sta + " >>>>>>> " + msg); } catch (Exception e) { e.printStackTrace(); } Toast.makeText(VideoUpload.this, "" + sta + " : " + msg, Toast.LENGTH_SHORT).show(); } }); } //close the streams // fileInputStream.close(); dos.flush(); dos.close(); } catch (MalformedURLException ex) { dialog.dismiss(); ex.printStackTrace(); runOnUiThread(new Runnable() { public void run() { messageText.setText("MalformedURLException Exception : check script url."); Toast.makeText(VideoUpload.this, "MalformedURLException", Toast.LENGTH_SHORT).show(); } }); Log.e("Upload file to server", "error: " + ex.getMessage(), ex); } catch (Exception e) { dialog.dismiss(); e.printStackTrace(); runOnUiThread(new Runnable() { public void run() { messageText.setText("Got Exception : see logcat "); Toast.makeText(VideoUpload.this, "Got Exception : see logcat ", Toast.LENGTH_SHORT).show(); } }); Log.e("Upload file to server Exception", "Exception : " + e.getMessage(), e); } dialog.dismiss(); return serverResponseCode; } // End else block } 

Answer 1

Try using BufferedReader:

 BufferedReader r = new BufferedReader(new InputStreamReader(conn.getInputStream())); StringBuilder result = new StringBuilder(); String line; while ((line = r.readLine()) != null) { result.append(line); } 

Answer 2

You get org.json.JSON Exception : End of input at character 0 because you have a null response that threw this exception.

So Check your result string before convert in to JSONObject.

JSONObject jobj = new JSONObject ( result ); // Check this line of results.

Respond to the request again.

Haresh Helana The answer is correct.

 BufferedReader r = new BufferedReader(new InputStreamReader(conn.getInputStream())); StringBuilder result = new StringBuilder(); String line; while ((line = r.readLine()) != null) { result.append(line); } JSONObject jobj = new JSONObject(result.toString()); 

Thanks.