How to send screen shot from client to server automatically in java
Did you ever think of getting screen shot from all computers in a network to a server. This code will helps you to do so....This code will capture the current desktop screen shot and sent it to server computer. This application is very useful to network administrator to track what other are doing in the computer at your organization.
ClientApp.java : is a client program that takes screen shot in regular interval. The sendScreen function will help you to know how java program takes screen shot at intervals and sends to server machine. Here i used ImageIO class to create image buffer. There are other options too... The file is sent through a socket. the port number i used here is 1729. Server Name here used is loop back ip, where you need to specify the server computer name or ip address.
On the Other hand
SeverApp.java will always listen to the port 1729. if any request comes there, it will catch request and save to the folder
ClientApp.java
import java.awt.AWTException;
import java.awt.Dimension;
import java.awt.Rectangle;
import java.awt.Robot;
import java.awt.Toolkit;
import java.awt.image.BufferedImage;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.File;
import java.io.IOException;
import java.net.Socket;
import java.net.UnknownHostException;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Random;
import javax.imageio.ImageIO;
/**
* @author lou reed
*
*/
public class ClientApp implements Runnable {
private static long nextTime = 0;
private static ClientApp clientApp = null;
private String serverName = "127.0.0.1"; //loop back ip
private int portNo = 1729;
//private Socket serverSocket = null;
/**
* @param args
* @throws InterruptedException
*/
public static void main(String[] args) throws InterruptedException {
clientApp = new ClientApp();
clientApp.getNextFreq();
Thread thread = new Thread(clientApp);
thread.start();
}
private void getNextFreq() {
long currentTime = System.currentTimeMillis();
Random random = new Random();
long value = random.nextInt(180000); //1800000
nextTime = currentTime + value;
//return currentTime+value;
}
@Override
public void run() {
while(true){
if(nextTime < System.currentTimeMillis()){
System.out.println(" get screen shot ");
try {
clientApp.sendScreen();
clientApp.getNextFreq();
} catch (AWTException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch(Exception e){
e.printStackTrace();
}
}
//System.out.println(" statrted ....");
}
}
private void sendScreen()throws AWTException, IOException {
Socket serverSocket = new Socket(serverName, portNo);
Toolkit toolkit = Toolkit.getDefaultToolkit();
Dimension dimensions = toolkit.getScreenSize();
Robot robot = new Robot(); // Robot class
BufferedImage screenshot = robot.createScreenCapture(new Rectangle(dimensions));
ImageIO.write(screenshot,"png",serverSocket.getOutputStream());
serverSocket.close();
}
}
