/* server.java a simple stream server */
import java.net.*;
import java.io.*;

public class server {
    public static void main(String[] args) throws IOException {

        ServerSocket serverSocket = null;
        int port = 0;
	if (args.length != 1) 
	{
        System.err.println(
           "usage java server port");
	System.exit(0);
	}
        try {
           port = Integer.parseInt(args[0]);
        }
        catch (NumberFormatException e) {
	    System.err.println("Arg was not a number");
            System.exit(0);
        }
        try {
            serverSocket = new ServerSocket(port);
        } catch (IOException e) {
            System.err.println("Error opening socket:" + e);
            System.exit(0);
        }

        Socket clientSocket = null;
        try {
            clientSocket = serverSocket.accept();
        } catch (IOException e) {
            System.err.println("Accept failed: + e");
            System.exit(0);
        }
        System.out.println("A connection has been accepted from "
              + clientSocket.getInetAddress().getHostName());
        PrintWriter out = new PrintWriter(clientSocket.getOutputStream(), 
                                    true);
        BufferedReader in = new BufferedReader(
				new InputStreamReader(
				clientSocket.getInputStream()));

	char buffer[] = new char[4096];
        int n;
        n = in.read(buffer,0,4096);
        if (n > 0) {
            String s = new String(buffer,0,n);
            System.out.println("Read " + n + " chars from the socket: " + s);
        }
        out.println("I got your message");
        out.close();
        in.close();
        clientSocket.close();
        serverSocket.close();
    }
}