GuiClient.java

/**This program obtains a reference of the remote 
 * object of server and invokes remote methods.
 * This is the GUI version of the Client
 * that is more advanced and has additional functionalities
 */
import java.awt.image.BufferedImage;
import java.rmi.*;
import java.rmi.server.*;
import java.util.*;
import java.awt.*;        // Using AWT container and component classes
import java.awt.event.*;  // Using AWT event classes and listener interfaces
import javax.swing.*;
import java.io.*;
import javax.imageio.*;
 
/******** A GUI program using container java.awt.Frame ************/

public class GuiClient extends JFrame implements ActionListener {
   private Label lblInput;     // Declare input Label
   private Label lblOutput;    // Declare output Label
   private Label lbIP;         // Declare IP Label
   private TextField tfIP;     // Declare IP TextField
   private TextField tfInput;  // Declare input TextField
   private TextField tfOutput; // Declare output TextField
   private Button Butqr;	   // Declare the Button to generate QR code
   private Button Butstr;	   // Declare the Button to stream
   private Button Butdow;	   // Declare the Button to download
   private String link;        // Input link
   private String vlink;       // Output link 
   private String ipadd;	   // IP address of the server
  
   public GuiClient() {
      setLayout(new FlowLayout());
 
 /**** We define the textfields and buttons*******/ 
 
      lbIP = new Label("Enter the IP address of the server: "); // Construct Label
      add(lbIP);               
 
      tfIP = new TextField(110); 	// Construct TextField
      add(tfIP);                	// "super" Frame adds TextField
	  tfIP.setText("10.16.31.163");	// Set a default value 
	  
      tfIP.addActionListener(this);
         // Hitting Enter on TextField fires ActionEvent
         // tfInput (TextField) registers this instance as ActionEvent listener
 
      lblInput = new Label("Enter a link below: "); 
      add(lblInput);              
   
      tfInput = new TextField(110); 
      add(tfInput);                
	  tfInput.setText("http://vodlocker.com/budq9rt5wt0e"); 
      tfInput.addActionListener(this);
 
      lblOutput = new Label("The download link is below: ");
      add(lblOutput);               
 
      tfOutput = new TextField(110); 
      tfOutput.setEditable(false);  // read-only
      add(tfOutput);                
 
 
 /**************Stream***************/
      Butstr = new Button("Stream");   // construct Button
      add(Butstr);                    // "super" Frame adds Button
	  
	  Butstr.addActionListener(new ActionListener() {
         public void actionPerformed(ActionEvent e) {
				streamvidlink(getvidlink());
				tfOutput.setText("The video is being streamed");
				
         }
      });
      
 /**************Download***************/
      Butdow = new Button("Download");   
      add(Butdow);                    
 
 	  Butdow.addActionListener(new ActionListener() {
         public void actionPerformed(ActionEvent e) {
				 downvidlink(getvidlink());
				tfOutput.setText("The video is being downloaded");
         }
      });
 
	/**************QR CODE***************/
      Butqr = new Button("Qr Code");   
      add(Butqr);                    
	
	  Butqr.addActionListener(new ActionListener() {
         public void actionPerformed(ActionEvent e) {
			// we load the qrvidlink() function that saves the image locally
			qrvidlink();
			try {
			// we display the image that is saved
			Runtime.getRuntime().exec("display qrcode.png");
			tfOutput.setText("The Qr code will be generated");}
        catch (Exception ex){           
			System.out.println("Qr Code failed: " + ex);
			}
         }
      });


      setTitle("Client");  // "super" Frame sets title
      setSize(900, 400);  // "super" Frame sets initial window size
      setVisible(true);   // "super" Frame shows
   }
 

   public static void main(String[] args) 
   {
      // Invoke the constructor to setup the GUI, by allocating an anonymous instance
      new GuiClient();
      		}
      		
/*********************************************************************/
/******** functionality when we press enter on the text field *******/
/*******************************************************************/

   @Override
   public void actionPerformed(ActionEvent evt) {
			   vlink = getvidlink(); // it gets the video link from the text input
               tfOutput.setText(vlink); // and tries to set the direct link to the video
            }
            

/**********************************************************************************/
/************ Here we define the functionality of the buttons ********************/
/********************************************************************************/
// we define the method for getting a video link when pressing enter
	public String getvidlink() {
		try {
				System.setSecurityManager(new SecurityManager()); 
	    	
				ipadd= tfIP.getText();
                Interface client = (Interface)Naming.lookup("rmi://"+ipadd+"/getvid");
             	    	
                // Get the String entered into the TextField tfInput, convert to int
                link = tfInput.getText();
                vlink = client.getvid(link);
            
            }catch (Exception e) {
	    		System.out.println("[System] Server failed: " + e);
	    	} 
	    	return vlink;
	}

// we define the method for getting a streaming link when pressing on the stream button
	public void streamvidlink(String msg) {
		try {
        Runtime.getRuntime().exec("smplayer " +msg);     }
        catch (Exception e) 
        {
            System.out.println("Streaming with smplayer failed: " + e);
        }
	    			
	}

// we define the method for downloading when pressing on the download button 
	public void downvidlink(String msg) {
		try {
        Runtime.getRuntime().exec("wget -c " +msg);     }
        catch (Exception e) 
        {
            System.out.println("Downloading with wget failed: " + e);
        }	
	}

// we define the method for downloading when pressing on the download button 
	public void qrvidlink() {
		try {
                System.setSecurityManager(new SecurityManager()); 
	    	
				ipadd= tfIP.getText();
                Interface client = (Interface)Naming.lookup("rmi://"+ipadd+"/getvid");
             	    	
                // Get the String entered into the TextField tfInput, convert to int
                link = tfInput.getText();
                vlink = client.getvid(link);
                
                // here we receive the image serialized into bytes from the server and 
                // saved it on the client as png image
                byte[] bytimg = client.qrvid(vlink); 
                BufferedImage img = ImageIO.read(new ByteArrayInputStream(bytimg));
                File outputfile = new File("qrcode.png");
				ImageIO.write(img,"png",outputfile);
				 
				//img= new ImageIcon(bytimg.toByteArray());   
            }catch (Exception e) {
	    		System.out.println("[System] Server failed: " + e);
	    	}
	}
}