A Guide to Mobile and Web Technology(LAMP)

create a folder name uploads with 777 permission.

create a file name upload.php in the same folder where the uploads folder is created.

Place the code in the file named upload.php

$target_path = "uploads/";

$target_path = $target_path . basename( $_FILES['uploadedfile']['name']);

if(move_uploaded_file($_FILES['uploadedfile']['tmp_name'], $target_path)) {
    echo "The file ".  basename( $_FILES['uploadedfile']['name']).
    " has been uploaded";
} else{
    echo "There was an error uploading the file, please try again!";

Client side code that is used to send file to a server. please include the following code in our client program.

private void doFileUpload(){

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

 // The full path of filename which is to be uploaded to server
  String exsistingFileName = "test.mp3";
  String lineEnd = "\r\n";
  String twoHyphens = "--";
  String boundary =  "*****";

  int bytesRead, bytesAvailable, bufferSize;

  byte[] buffer;

  int maxBufferSize = 1*1024*1024;

  String responseFromServer = "";

  //Server path to the upload.php
  String urlString = "http://xxx.xxx.xxx.xxx/upload.php";

   //------------------ CLIENT REQUEST

  FileInputStream fileInputStream = new FileInputStream(new File(exsistingFileName) );

   // open a URL connection to the Servlet

   URL url = new URL(urlString);

   // Open a HTTP connection to the URL

   conn = (HttpURLConnection) url.openConnection();

   // Allow Inputs

   // Allow Outputs

   // Don't use a cached copy.

   // Use a post method.

   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=\"uploadedfile\";filename=\"" + exsistingFileName +"\"" + lineEnd);

   System.out.println("Headers are written");

   // 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(twoHyphens + boundary + twoHyphens + lineEnd);

   // close streams
   System.out.println("File is written");

  catch (MalformedURLException ex)

  catch (IOException ioe)

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

  try {
        inStream = new DataInputStream ( conn.getInputStream() );
        String str;
        while (( str = inStream.readLine()) != null)
            //the str contains the server response   
         System.out.println("Server Response"+str);
  catch (IOException ioex){


If the file is sucessfully uploaded the response will be

The file test.mp3 has been uploaded.

otherwise the response will be

There was an error uploading the file, please try again!

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google photo

You are commenting using your Google account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s

%d bloggers like this: