HttpURLConnection conn = null;
           BufferedReader br = null;
           DataOutputStream dos = null;
           DataInputStream inStream = null;

           InputStream is = null;
           OutputStream os = null;
           boolean ret = false;
           String StrMessage = "";

           String lineEnd = "\r\n";
           String twoHyphens = "--";
           String boundary =  "*****";


           int bytesRead, bytesAvailable, bufferSize;

           byte[] buffer;

           int maxBufferSize = 1*1024*1024;


           String responseFromServer = "";
            try
              {
               //------------------ CLIENT REQUEST

               FileInputStream fileInputStream = new FileInputStream(temp_f.getFile());

               // open a URL connection to the Servlet 

               URL url = new URL(url_remoto);


               // Open a HTTP connection to the URL

               conn = (HttpURLConnection) url.openConnection();

               // Allow Inputs
               conn.setDoInput(true);

               // Allow Outputs
               conn.setDoOutput(true);

               // Don't use a cached copy.
               conn.setUseCaches(false);

               // Use a post method.
               conn.setRequestMethod("POST");

               conn.setRequestProperty("Connection", "Keep-Alive");

               conn.setRequestProperty("Content-Type", "multipart/form-data;boundary="+boundary);

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

               dos.writeBytes(twoHyphens + boundary + lineEnd);
               dos.writeBytes("Content-Disposition: form-data; name=\"foto\";"
                  + " filename=\"" + percorso_file_da_Caricare +"\"" + 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);

               // close streams

               fileInputStream.close();
               dos.flush();
               dos.close();


              }
              catch (MalformedURLException ex)
              {
               System.out.println("From ServletCom CLIENT REQUEST:"+ex);
              }

              catch (IOException ioe)
              {
               System.out.println("From ServletCom CLIENT REQUEST:"+ioe);
              }


              //------------------ read the SERVER RESPONSE

              String[] dati_img = new String[2];
              try
              {
               inStream = new DataInputStream ( conn.getInputStream() );
               String str;
               int i = 0;
               while (( str = inStream.readLine()) != null)
               {
                if (i == 2) break;
                dati_img[i] = str;
               // System.out.println("Server response is: "+str);
               // System.out.println("");
                i++;
               }
               a1.add(dati_img);
               inStream.close();

              }
              catch (IOException ioex)
              {
               System.out.println("From (ServerResponse): "+ioex);

              }