/*
 * Copyright (c) 2001 Matthew Feldt. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided the copyright notice above is
 * retained.
 *
 * THIS SOFTWARE IS PROVIDED ''AS IS'' AND WITHOUT ANY EXPRESSED OR
 * IMPLIED WARRANTIES.
 */

/**
 * TimeServer.java
 *
 * Java Examples In A Nutshell Copyright (c) 2000 David Flanagan
 * Exercise 5-3:
 * Write a simple server that reports the current time (in textual form) to any
 * client that connects. Use Example 5-5, HttpMirror, as a framework for your
 * server. This server should simply output the current time and close the con-
 * nection, without reading anything from the client. You need to choose a port
 * number that your service listnes on. Use the GenericClient program of
 * Example 5-8 to connect to this port and test your program. To do this,
 * encode the appropriate port number into the URL. HttpClient sends an
 * extraneous GET request to the time server, but it still displays the server's
 * response.
 *
 * @author Matthew Feldt <developer@feldt.com>
 * @version 1.0, 03/07/2001 20:41
 */


package com.feldt.examples.net;
import java.io.*;
import java.net.*;
import java.util.*;

public class TimeServer {
	public static void main(String args[]) {
		final String usage = "Usage: java TimeServer <port>";

		try {
			// parse command line for TimeServer port
			if (args.length != 1) {
				System.err.println(usage);
				System.exit(-1);
			}
			int port = Integer.parseInt(args[0]);

			// create TimeServer socket on specified port
			ServerSocket ss = new ServerSocket(port);

			// loop infinitely, responding to all connections
			for(;;) {
				// wait for client connections
				Socket client = ss.accept();

				// create output stream to talk to the client
				PrintWriter out = new PrintWriter(client.getOutputStream());

				// send current time and date
				out.print(new Date() + "\n");

				// close the output stream and client connection
				out.close();
				client.close();
			}
		} catch (Exception e) {
			System.err.println(e);
			System.err.println(usage);
		}
	}
}