How to send image as base64 string in JSON using HTTP POST in Android?

Question

I need to send the json request to server using HttpPost. Here is my current code :

public static String makeRequest(String uri, String json) {
        HttpURLConnection urlConnection;

        String data = json;
        String result = null;
        try {
            //Connect 
            urlConnection = (HttpURLConnection) ((new URL(uri).openConnection()));
            urlConnection.setDoOutput(true);
            urlConnection.setRequestProperty("Content-Type", "application/json");
            urlConnection.setRequestProperty("Accept", "application/json");
            urlConnection.setRequestMethod("POST");
            urlConnection.connect();

            //Write
            OutputStream outputStream = urlConnection.getOutputStream();
            BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(outputStream, "UTF-8"));
            writer.write(data);
            writer.close();
            outputStream.close();

            //Read
            BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(urlConnection.getInputStream(), "UTF-8"));

            String line = null;
            StringBuilder sb = new StringBuilder();

            while ((line = bufferedReader.readLine()) != null) {
                System.out.println("Uploading............");
                sb.append(line);
            }

            bufferedReader.close();
            result = sb.toString();
            System.out.println("Response : " +result);

        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return result;
    }

But it gives me 400, that means bad request.

Note : when base64 path is small then only it works, otherwise it is not working. Please help me.

What does the base64 path look like when it does work? And when it doesn't? — Moishe Lipsker
– Moishe Lipsker, Commented Aug 26, 2015 at 10:25
when the base64 path is small then it works, but when the base64 path is large then not working — Mayank Sugandhi
– Mayank Sugandhi, Commented Aug 26, 2015 at 10:27
Can you give an example of the actual path that worked/didn't work for you? — Moishe Lipsker
– Moishe Lipsker, Commented Aug 26, 2015 at 10:28
Both the path are works, when i check on browser. But is path length is too long then i am getting error like "File not found" — Mayank Sugandhi
– Mayank Sugandhi, Commented Aug 26, 2015 at 10:30

Shoeb Siddique · Accepted Answer · 2015-08-26 11:21:23Z

Please use this code:

try {

                        HttpURLConnection urlConnection;


                        String result = "";
                        try {
                            String data ="";
                            data = jsonObj.toString();
                            //          String temp=URLEncoder.encode(uri, "UTF-8");
                            URL url = new URL(WebServiceConstants.getMethodUrl(WebServiceConstants.METHOD_UPDATEVENDER));
                            urlConnection = (HttpURLConnection) ((url.openConnection()));
                            urlConnection.setDoInput(true);
                            urlConnection.setDoOutput(true);
                            urlConnection.setUseCaches(false);
                            urlConnection.setChunkedStreamingMode(1024);

                            urlConnection.setRequestProperty("Content-Type", "application/json");
                            urlConnection.setRequestProperty("Accept", "application/json");
                            urlConnection.setRequestMethod("POST");
                            urlConnection.connect();

                            //Write
                            OutputStream outputStream = urlConnection.getOutputStream();
                            BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(outputStream, "UTF-8"));
                            writer.write(data);
                            writer.close();
                            outputStream.close();

                            //Read
                            BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(urlConnection.getInputStream(), "UTF-8"));

                            String line = null;
                            StringBuilder sb = new StringBuilder();

                            while ((line = bufferedReader.readLine()) != null) {
                                System.out.println("Uploading............");
                                sb.append(line);
                            }

                            bufferedReader.close();
                            _responseMain = sb.toString();
                            System.out.println("Response of Image Upload : " +_responseMain);


                        } catch (UnsupportedEncodingException e) {
                            e.printStackTrace();
                        } catch (IOException e) {
                            e.printStackTrace();
                        }
                        //                      makeRequest(WebServiceConstants.getMethodUrl(WebServiceConstants.METHOD_UPDATEVENDER), jsonObj.toString());
                    } 
                    catch (Exception e) {
                        // TODO: handle exception
                        e.printStackTrace();

                        runOnUiThread( new Runnable() {
                            public void run() 
                            {
                                Constant.showAlertDialog("Message",getResources().getString(R.string.communicationError), VendorEditProfile.this, false);
                            }
                        });

                    }

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