telnetclient.java

java 平台 telnet 繁体中文版

/*
 *
 * Created       : 2000 Jan 30 (Sun) 20:35:41 by Harold Carr.
 * Last Modified : 2000 Jan 31 (Mon) 03:59:34 by Harold Carr.
 */

package hc.net;

import java.io.InputStream;
import java.io.IOException;
import java.io.PrintStream;

import de.mud.telnet.TelnetWrapper;

public class TelnetClient
{
    public static void main (String[] av)
    {
	String host = "localhost";
	int    port = 23;
	switch (av.length) {
	case 2  : port = Integer.parseInt(av[1]);
	case 1  : host = av[0];
	case 0  : break;
	default : System.exit(-1);
	}
	new TelnetClient(System.in, System.out, host, port);
    }

    public TelnetClient (InputStream in, PrintStream out, 
			 String host, int port)
    {
	TelnetWrapper telnetWrapper = new TelnetWrapper();
	try {
	    telnetWrapper.connect(host, port);
	} catch (IOException e) {
	    System.out.println("TelnetClient: Got exception during connect: " + e);
	    e.printStackTrace();
	}
	createAndStartReader(telnetWrapper, out);
	byte[] buf = new byte[256];
	int n = 0;
	try {
	    while (n >= 0) {
		n = in.read(buf);
		if (n > 0) {
		    byte[] sendBuf = new byte[n];
		    System.arraycopy(buf, 0, sendBuf, 0, n);
		    // Must be transpose (not send) or connect is closed.
		    telnetWrapper.transpose(sendBuf);
		}
	    }
	} catch (IOException e) {
	    System.out.println("TelnetClient: Got exception in read/write loop: " + e);
	    e.printStackTrace();
	    return;
	} finally {
	    try {
		telnetWrapper.disconnect();
	    } catch (IOException e) {
		System.out.println("TelnetClient: got exception in disconnect: " + e);
		e.printStackTrace();
	    }
	}
    }

    class ReaderThread extends Thread
    {
	TelnetWrapper telnetWrapper;
	PrintStream out;

	ReaderThread (TelnetWrapper telnetWrapper, PrintStream out)
	{
	    super("TelnetReaderThread");
	    this.telnetWrapper = telnetWrapper;
	    this.out = out;
	}

	public void run ()
	{
	    System.out.println("thread-starting");
	    byte[] buf = new byte[256];
	    int n = 0;
	    while (n >= 0) {
		try {
		    n = telnetWrapper.read(buf);
		    if (n > 0) {
			out.print(new String(buf, 0, n));
		    }
		} catch (IOException e) {
		    System.out.println("ReaderThread.run: got exception in read/write loop: " + e);
		    e.printStackTrace();
		    return;
		}
	    }
	}
    }

    public Thread createAndStartReader (TelnetWrapper telnetWrapper,
					PrintStream out)
    {
	ReaderThread readerThread = new ReaderThread(telnetWrapper, out);
	readerThread.start();
	return readerThread;
    }
}

// End of file.