HTTPConnectSocketFactory.java

package org.jopenray.rfb;

//
//  Copyright (C) 2002 Constantin Kaplinsky, Inc.  All Rights Reserved.
//
//  This 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 software 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 software; if not, write to the Free Software
//  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
//  USA.
//

//
// HTTPConnectSocketFactory.java together with HTTPConnectSocket.java
// implement an alternate way to connect to VNC servers via one or two
// HTTP proxies supporting the HTTP CONNECT method.
//

import java.applet.Applet;
import java.io.IOException;
import java.net.Socket;

class HTTPConnectSocketFactory implements SocketFactory {

	public Socket createSocket(String host, int port, Applet applet)
			throws IOException {

		return createSocket(host, port, applet.getParameter("PROXYHOST1"),
				applet.getParameter("PROXYPORT1"));
	}

	public Socket createSocket(String host, int port, String[] args)
			throws IOException {

		return createSocket(host, port, readArg(args, "PROXYHOST1"), readArg(
				args, "PROXYPORT1"));
	}

	public Socket createSocket(String host, int port, String proxyHost,
			String proxyPortStr) throws IOException {

		int proxyPort = 0;
		if (proxyPortStr != null) {
			try {
				proxyPort = Integer.parseInt(proxyPortStr);
			} catch (NumberFormatException e) {
			}
		}

		if (proxyHost == null || proxyPort == 0) {
			System.out
					.println("Incomplete parameter list for HTTPConnectSocket");
			return new Socket(host, port);
		}

		System.out.println("HTTP CONNECT via proxy " + proxyHost + " port "
				+ proxyPort);
		HTTPConnectSocket s = new HTTPConnectSocket(host, port, proxyHost,
				proxyPort);

		return (Socket) s;
	}

	private String readArg(String[] args, String name) {

		for (int i = 0; i < args.length; i += 2) {
			if (args[i].equalsIgnoreCase(name)) {
				try {
					return args[i + 1];
				} catch (Exception e) {
					return null;
				}
			}
		}
		return null;
	}
}