Android post image to php server always fail

Question

Thanks to everyone who helped me.

Here is my success method, use post method to post two parameter(no, key) and image file to php server.

Hope can help other in need.

static String postUploadImageToPHPServer(String URL, String no, String key, String imgPath) {
        String multipart_form_data = "multipart/form-data";
        String twoHyphens = "--";
        String boundary = "**********uploadimage**********";
        String lineEnd = System.getProperty("line.separator");

        try {
            URL url = new URL(URL);
            HttpURLConnection conn = (HttpURLConnection) url.openConnection();
            conn.setConnectTimeout(120000);
            conn.setDoOutput(true);
            conn.setDoInput(true);
            conn.setUseCaches(false);
            conn.setRequestMethod("POST");
            conn.setRequestProperty("Connection", "Keep-Alive");
            conn.setRequestProperty("Content-Type", multipart_form_data + "; boundary=" + boundary);
            conn.connect();

            DataOutputStream output = new DataOutputStream(conn.getOutputStream());

            addImageContent(imgPath, output);
            addNoFormField(no, output);
            addKeyFormField(key, output);

            output.writeBytes(twoHyphens + boundary + twoHyphens + lineEnd);
            output.flush();

            BufferedReader input = new BufferedReader(new InputStreamReader(conn.getInputStream()));
            StringBuilder response = new StringBuilder();
            String oneLine;
            while((oneLine = input.readLine()) != null) {
                response.append(oneLine + lineEnd);
            }

            return response.toString();
        } catch (Exception e) {
            Log.e(TAG, "Error: " + e.getMessage());
            return null;
        }
    }

Here method is how to add Image data.

private static void addImageContent(String _path, DataOutputStream _output) {
        StringBuilder split = new StringBuilder();
        split.append(twoHyphens + boundary + lineEnd);
        split.append("Content-Disposition: form-data; name=\"" + "img" + "\"; filename=\"" + _path + "\"" + lineEnd);
        split.append("Content-Type: " + "image/jpeg" + lineEnd);
        split.append(lineEnd);
        try {
            Bitmap bitmap = BitmapFactory.decodeFile(_path);
            ByteArrayOutputStream baos = new ByteArrayOutputStream();
            bitmap.compress(Bitmap.CompressFormat.JPEG, 80, baos);
            byte[] imageBytes = baos.toByteArray();

            _output.writeBytes(split.toString());
            _output.write(imageBytes);
            _output.writeBytes(lineEnd);

            baos.close();
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }

Here method is how to add text data, my addNoFormField function is similar to addKeyFormField function , just change name=\"your param\"".

private static void addNoFormField(String _value, DataOutputStream _output) {
        StringBuilder sb = new StringBuilder();
        sb.append(twoHyphens + boundary + lineEnd);
        sb.append("Content-Disposition: form-data; name=\"no\"" + lineEnd);
        sb.append("Content-Type: application/json; charset=utf-8" + lineEnd);
        sb.append(lineEnd);
        sb.append(_value + lineEnd);
        try {
            _output.writeBytes(sb.toString());
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }

Answer 1

I'm not sure you're doing this image uploading the correct way. Anyway, if your image upload works fine and if you have a problem in just sending those two parameters try adding these two parameters as another setRequestProperty.

Even the image upload also fails, check these: http://codesfor.in/how-to-upload-image-to-server-as-base64-encoded-string/comment-page-1/

Doing it JSON way, Sending base64 encoded image to server using HttpUrlConnection Android

Answer 2

I was having the same problem when sending the image as string ,try to send it as a file through Multipart, try to use this function when you are making image request as postWebserviceCallForImage()

public String makeImageRequest(String url, String method,
                                    String image,List<NameValuePair> nameValuePairs) {
//url to post the image,method 'post',image absolute path on the phone,'is' is inputstream 
        
        try {
            json="";


     
            MultipartEntityBuilder builder = MultipartEntityBuilder.create();

  
            builder.setMode(HttpMultipartMode.BROWSER_COMPATIBLE);
            FileBody fbd=new FileBody(new File(image));
            builder.addPart("my_file",fbd);

//if you want to add string



for (int index = 0; index < nameValuePairs.size(); index++) {


                builder.addPart(nameValuePairs.get(index).getName(),new StringBody(nameValuePairs.get(index).getValue(),ContentType.TEXT_PLAIN));

            }


          


            HttpParams httpParameters = new BasicHttpParams();
            int timeoutConnection = 10000;
            HttpConnectionParams.setConnectionTimeout(httpParameters, timeoutConnection);

            int timeoutSocket = 12000;
            HttpConnectionParams.setSoTimeout(httpParameters, timeoutSocket);

            DefaultHttpClient httpClient = new DefaultHttpClient(httpParameters);
            HttpPost httpPost = new HttpPost(url);

            HttpEntity entity = builder.build();

            httpPost.setEntity(entity);

            HttpResponse httpResponse = httpClient.execute(httpPost);
            HttpEntity httpEntity = httpResponse.getEntity();
            is = httpEntity.getContent();

        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        } catch (ClientProtocolException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }

        try {
            BufferedReader reader = new BufferedReader(new InputStreamReader(
                    is, "iso-8859-1"), 8);
            StringBuilder sb = new StringBuilder();
            String line = null;
            while ((line = reader.readLine()) != null) {
                sb.append(line + "\n");
            }
            is.close();
            json = sb.toString();
        } catch (Exception e) {
            Log.e("Buffer Error", "Error converting result " + e.toString());
        }



        return json;

    }

In your asyn task call this function and I hope it will work and also dont forget to add this dependency to your gradle if not present:

implementation group: 'org.apache.httpcomponents', name: 'httpmime', version: '4.3.1'