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/* From http://java.sun.com/docs/books/tutorial/index.html */
import java.io.DataInputStream;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetAddress;
import java.util.Date;
public class QuoteServer {
public static void main(String[] args) throws IOException {
new QuoteServerThread().start();
}
}
class QuoteServerThread extends Thread {
private DatagramSocket socket = null;
private DataInputStream in = null;
private boolean moreQuotes = true;
public QuoteServerThread() throws IOException {
super("QuoteServerThread");
socket = new DatagramSocket(4445);
try {
in = new DataInputStream(new FileInputStream("one-liners.txt"));
} catch (FileNotFoundException e) {
System.err
.println("Could not open quote file. Serving time instead.");
}
}
public void run() {
while (moreQuotes) {
try {
byte[] buf = new byte[256];
// receive request
DatagramPacket packet = new DatagramPacket(buf, buf.length);
socket.receive(packet);
// figure out response
String dString = null;
if (in == null)
dString = new Date().toString();
else
dString = getNextQuote();
dString.getBytes(0, dString.length(), buf, 0);
// send the response to the client at "address" and "port"
InetAddress address = packet.getAddress();
int port = packet.getPort();
packet = new DatagramPacket(buf, buf.length, address, port);
socket.send(packet);
} catch (IOException e) {
e.printStackTrace();
moreQuotes = false;
}
}
socket.close();
}
private String getNextQuote() {
String returnValue = null;
try {
if ((returnValue = in.readLine()) == null) {
in.close();
moreQuotes = false;
returnValue = "No more quotes. Goodbye.";
}
} catch (IOException e) {
returnValue = "IOException occurred in server.";
}
return returnValue;
}
}
/////////////////////////////////////////////////
import java.io.IOException;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetAddress;
public class QuoteClient {
public static void main(String[] args) throws IOException {
if (args.length != 1) {
System.out.println("Usage: java QuoteClient <hostname>");
return;
}
// get a datagram socket
DatagramSocket socket = new DatagramSocket();
// send request
byte[] buf = new byte[256];
InetAddress address = InetAddress.getByName(args[0]);
DatagramPacket packet = new DatagramPacket(buf, buf.length, address,
4445);
socket.send(packet);
// get response
packet = new DatagramPacket(buf, buf.length);
socket.receive(packet);
// display response
String received = new String(packet.getData());
System.out.println("Quote of the Moment: " + received);
socket.close();
}
}
/////////////////////////////////////////////////
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