httptunnelingincomingdatahandler.java

java实现的代理程序 socket 编程实现的http 和socket 代理程序

package javatunnel;

import java.net.*;
import java.io.*;

/**
 *
 *JavaTunnel
 *
 *Copyright (C) 2002 Andr閟 Ederra
 *
 *This program is free software; you can redistribute it and/or
 *modify it under the terms of the GNU General Public License
 *as published by the Free Software Foundation; either version 2
 *of the License, or (at your option) any later version.
 *
 *This program is distributed in the hope that it will be useful,
 *but WITHOUT ANY WARRANTY; without even the implied warranty of
 *MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *GNU General Public License for more details.
 *
 *You should have received a copy of the GNU General Public License
 *along with this program; if not, write to the Free Software
 *Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
*/
public class HTTPTunnelingIncomingDataHandler
	extends Thread
	implements DataHandler {

	private static final int BUFFERSIZE = 1024 * 10;
	private static final int WAITCYCLE = 200;
	private HttpURLConnection GETconn;
	private Socket in;
	private String destinationURL;
	private int destinationPort;
	private String serverURL;
	private int serverPort;
	private String ticket;

	public HTTPTunnelingIncomingDataHandler(
		Socket in,
		String destinationURL,
		int destinationPort,
		String serverURL,
		int serverPort,
		String ticket) {
		this.in = in;
		this.destinationURL = destinationURL;
		this.destinationPort = destinationPort;
		this.serverURL = serverURL;
		this.serverPort = serverPort;
		this.ticket = ticket;
	}
	public void run() {

		InputStream inStream;
		OutputStream outStream;
		try {
			URL url =
				new URL(
					"http"
						+ "://"
						+ serverURL
						+ ":"
						+ serverPort
						+ "/JavaTunnel/server");
			byte[] buffer = new byte[BUFFERSIZE];
			while (true) {

				try {
					Thread.sleep(WAITCYCLE);
				} catch (InterruptedException ie) {
					ie.printStackTrace();
				}
				GETconn = (HttpURLConnection) url.openConnection();
				GETconn.setDoInput(true);
				GETconn.setRequestMethod("GET");
				GETconn.setRequestProperty("TunnelControl", "IN " + ticket);
				GETconn.setUseCaches(false);
				inStream = GETconn.getInputStream();
				outStream = in.getOutputStream();

				int n = 0;
				while (n != -1) {
					n = inStream.read(buffer);
					if (n != -1) {
						outStream.write(buffer, 0, n);
						outStream.flush();
					}
				}
			}
		} catch (IOException ioe) {
			ioe.printStackTrace();
			System.out.println(
				"Error de conexi髇 en sockets\nExcepcion: " + ioe);
			System.exit(1);
		}
	}
	public void stopHandler(){}
}