How to read multipart response, sent from resteasy to android, using okHttp?

Question

I want to upload list of files (images in my case) from JBoss server to android. I am doing so by the below written code:

@GET
@Path("/report/{filename}")
@Produces({MediaType.MULTIPART_FORM_DATA})
public MultipartFormDataOutput getReport(@PathParam("filename") String filename, @Context HttpServletRequest request) {
    try {
        String token = request.getHeader("Authorization");
        List<File> file = processImage.getImage(filename,token);
        MultipartFormDataOutput output = new MultipartFormDataOutput();
        for(File image: file){
        System.out.println("class of this" +image + "MMMM" +image.exists());
        output.addPart(image, new MediaType("image","jpg"));
        }
        return output;

    } .....
      .......
}

On Android side I want to read the response (the files in multipart form). I am using okHttp to make the connection. Searching a lot on internet I tried the below code to read the multipart response, but it is not working. It seems that is not reading anything from the stream.

ByteArrayDataSource ds = new ByteArrayDataSource(response.body().byteStream(), "multipart/form-data");
            MimeMultipart multipart = new MimeMultipart(ds);
            BodyPart jsonPart = multipart.getBodyPart(0);

            System.out.println("Response body = " + jsonPart.getInputStream());
            File reportFile = new File(Environment.getExternalStorageDirectory() + File.separator + "downloadedFile.jpg");
            InputStream is = jsonPart.getInputStream();
            FileOutputStream fileOutputStream = null;
            try {
                fileOutputStream = new FileOutputStream(reportFile);
                byte[] buffer = new byte[MEGABYTE];
                int bufferLength = 0;

                while ((bufferLength = is.read(buffer)) > 0) {
                    fileOutputStream.write(buffer, 0, bufferLength);
                }
                is.close();
                fileOutputStream.close();   
                  .......
            }

Can anyone please help me solving this. I am stuck here from 2 days. What am I doing wrong .

can you show this line output System.out.println("Response body = " + jsonPart.getInputStream()); — Vishal Thakkar, Feb 15 '17 at 04:22
http://www.coderzheaven.com/2011/08/16/how-to-upload-multiple-files-in-one-request-along-with-other-string-parameters-in-android/ or http://stackoverflow.com/questions/32984323/upload-multiple-image-file-using-httpurlconnection — Ajay Pandya, Feb 15 '17 at 04:47
try this one http://stackoverflow.com/questions/35622676/image-upload-using-okhttp/35622812#35622812 — Andy Developer, Feb 15 '17 at 05:32
@AjayPandya and AndyDeveloper, you're both pointing to solutions for a multipart request. The question is about how to handle a multipart response. I wish I had the answer...I'm here looking for the answer to the same question. — Sam Mefford, Apr 06 '17 at 19:38

score 1 · Answer 1 · answered Apr 06 '17 at 20:36

Are you possibly using HttpLoggingInterceptor with setLevel(HttpLoggingInterceptor.Level.BODY)? I used your code to successfully parse a multipart response. But once I change the level from HEADERS to BODY, that code no longer works, and acts as if it is not reading anything from the stream. I already reported the issue: https://github.com/square/okhttp/issues/3269

By the way, thanks for giving me sample code to allow me to parse a multipart body with OkHttp. For others who may come along, I had to add this to my maven pom.xml:

    <dependency>
        <groupId>com.sun.mail</groupId>
        <artifactId>javax.mail</artifactId>
        <version>1.5.6</version>
    </dependency>

Thanks I got the solution. Will be posting soon – Yoda Apr 07 '17 at 05:00 — Yoda, Apr 07 '17 at 05:00

score 1 · Accepted Answer · answered May 17 '17 at 02:22

You can do the following:

Create an async task to run in the background
Use okhttp3.Request to create the request
Create OkHttpClient to send the request and save the response in okHttp3 Response
Then get the response body from the okhttp3.ResponseBody and use InputStreamReader and BufferedReader to read the files.

Something like following should work:

private class FileTask extends AsyncTask<Void, Void, Void> {
   private File file = null;
    @Override
    protected Void doInBackground(Void... params) {

        okhttp3.Request request = new okhttp3.Request.Builder()
                .url("Your URL for getReport()")
                .get()
                .build();
        OkHttpClient okHttpClient = new OkHttpClient.Builder().
                        connectTimeout(80, TimeUnit.SECONDS)
                        .writeTimeout(80, TimeUnit.SECONDS)
                        .readTimeout(80, TimeUnit.SECONDS)
                        .build();


        try {
            Response response = okHttpClient.newCall(request).execute();
            okhttp3.ResponseBody in = response.body();
            InputStream is = in.byteStream();
            InputStreamReader inputStreamReader = new InputStreamReader(is);
            BufferedReader buffReader = new BufferedReader(inputStreamReader);

            file = new File(Environment.getExternalStorageDirectory() + File.separator + "filename.txt"); //Your output file
            OutputStream output = new FileOutputStream(file);
            BufferedOutputStream bufferedOutputStream = new BufferedOutputStream(output);


            String line=buffReader.readLine();
            while ((line=buffReader.readLine()) != null) {
                output.write(line.getBytes());
                output.write('\n');
            }
            buffReader.close();
            output.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }

    @Override
    protected void onPostExecute(Void aVoid) {
        //do post execution steps
        }
    }
}

score 0 · Answer 3 · answered Feb 15 '17 at 04:52

try this:

 //first you should convert image into bytearray


 VolleyMultipartRequest multipartRequest = new VolleyMultipartRequest(Request.Method.POST, url, new Response.Listener<NetworkResponse>() {
        @Override
        public void onResponse(NetworkResponse response) {

            System.out.println(" response"+response.data);


            String resultResponse = new String(response.data);
            System.out.println("-------------  response-----------------"+resultResponse);

            try {
                JSONObject jsonObject = new JSONObject(resultResponse);
                sStatus = jsonObject.getString("status");


                } else {

                }
            } catch (JSONException e) {
                e.printStackTrace();
            }
            dialog.dismiss();
        }
    }, new Response.ErrorListener() {
        @Override
        public void onErrorResponse(VolleyError error) {

            dialog.dismiss();

            NetworkResponse networkResponse = error.networkResponse;
            String errorMessage = "Unknown error";
            if (networkResponse == null) {
                if (error.getClass().equals(TimeoutError.class)) {
                    errorMessage = "Request timeout";
                } else if (error.getClass().equals(NoConnectionError.class)) {
                    errorMessage = "Failed to connect server";
                }
            } else {
                String result = new String(networkResponse.data);
                try {
                    JSONObject response = new JSONObject(result);
                    String status = response.getString("status");
                    String message = response.getString("message");

                    Log.e("Error Status", status);
                    Log.e("Error Message", message);

                    if (networkResponse.statusCode == 404) {
                        errorMessage = "Resource not found";
                    } else if (networkResponse.statusCode == 401) {
                        errorMessage = message + " Please login again";
                    } else if (networkResponse.statusCode == 400) {
                        errorMessage = message + " Check your inputs";
                    } else if (networkResponse.statusCode == 500) {
                        errorMessage = message + " Something is getting wrong";
                    }
                } catch (JSONException e) {
                    e.printStackTrace();
                }
            }
            Log.i("Error", errorMessage);
            error.printStackTrace();
        }
    }) {

        @Override
        protected Map<String, String> getParams() {
            Map<String, String> params = new HashMap<>();
            params.put("id",ID);
            System.out.println("id---------------"+ID);
            return params;
        }

        @Override
        protected Map<String, DataPart> getByteData() {
            Map<String, DataPart> params = new HashMap<>();
            params.put("image",new DataPart("imnage.jpg", byteArray));

            return params;
        }
    }

    AppController.getInstance().addToRequestQueue(multipartRequest);

}

Your response uses VolleyMultipartRequest which appears to depend on apache httpclient. The question was how to do this using okhttp, not httpclient. — Sam Mefford, Apr 06 '17 at 19:34

How to read multipart response, sent from resteasy to android, using okHttp?

3 Answers3