Hi guys,
this is my third question in as many days. I am pasting
code below. it has an ImageServer and a client. the server
is sending a specified file size. on the client side, i get
a IO exception. the message is something like this.
java.IO.exception
at
sun.awt.image.GIFImageDecoder.readheader<GIFImageDecoder.java:343>
sun.awt.image.GIFImageDecoder.produceImage<GIFImageDecoder.java:>
sun.awt.image.InputStreamImageSource.doFetch<InputStreamImageSource.java:248>
sun.awt.image.ImageFetcher.fetchloop<ImageFetcher.java:221>
sun.awt.image.ImageFetcher.run<ImageFetcher.java:189>
can somebody tell me what it could be. i would really
apprecite any help from you guys. please...............
//// SERVER //////////////////////
import java.net.*;
import java.io.*;
public class ImageServer {
static final int PORT = 12345;
static MulticastSocket msocket;
static byte[] buffer;
public static void main(String[] args) {
try {
File fi=new
File("D:\\all_user\\pavan\\multicast\\active.gif");
FileInputStream bis=new FileInputStream(fi);
System.out.println("Available(input) = " +
bis.available());
msocket = new MulticastSocket();
buffer = new byte[bis.available()];
bis.read(buffer, 0, bis.available());
InetAddress address =
InetAddress.getByName("224.50.50.123");
msocket.joinGroup(address);
DatagramPacket packet = new DatagramPacket(buffer,
buffer.length, address, PORT );
System.out.println("Packet size = " +
packet.getLength());
System.out.println("Address = " + packet.getAddress());
msocket.send(packet);
}
catch (IOException e) {
System.out.println("IO error");
e.printStackTrace();
}
catch (NullPointerException e) {
System.out.println("Null pointer error (maybe closing
socket)");
e.printStackTrace();
}
catch (Exception e) {
System.out.println("Other error");
e.printStackTrace();
}
}
}
/////CLIENT ////////////////////
import java.awt.*;
import java.awt.image.*;
import javax.swing.*;
import java.io.*;
import java.net.*;
public class SecondTest extends JFrame {
MulticastSocket msocket;
InetAddress addr;
final static int PORT=12345;
DatagramPacket packet;
Image image;
public SecondTest(String tes) {
setTitle(tes);
byte[] buffer = new byte[256];
try {
addr = InetAddress.getByName("224.50.50.123");
System.out.println("address is" + addr);
System.out.println(" Port is "+ PORT);
msocket = new MulticastSocket(PORT);
msocket.joinGroup(addr);
System.out.println("Created Socket" + msocket);
System.out.println("Waiting for packets..........");
msocket.setSoTimeout(70000);
// The code does not work beyond this.
try {
packet = new DatagramPacket (buffer,
buffer.length);
msocket.receive(packet);
/* no packets are being received and hence the following
statement is not printed*/
System.out.println("receiving packet. Size = " +
packet.getLength());
}
catch(Exception re) {re.printStackTrace();}
}
catch (Exception e) {
System.out.println("Error!");
e.printStackTrace();
}
System.out.println("The length of buffer is = " +
buffer.length);
image =
Toolkit.getDefaultToolkit().createImage(packet.getData());
MediaTracker tracker = new MediaTracker(this);
tracker.addImage(image, 1);
try {
tracker.waitForAll();
} catch (Exception e) {
image = null;
System.err.println("Can't load image");
}
setSize(500, 400);
setBackground(Color.yellow);
setVisible(true);
}
public void paint(Graphics g) {
if (image != null) {
g.drawImage(image, 50, 50, null);
}
}
}
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