6370908: Add support for HTTP_CONNECT proxy in Socket class

[Damjan Jovanovic]

Hi

>From http://bugs.sun.com/view_bug.do?bug_id=6370908

This RFE is basically about getting a TCP socket to tunnel through an
HTTP proxy using the HTTP CONNECT request.

I've found a hack to get this feature to work, using sun.net.*
packages and lots of reflection. Would it be acceptable to use this
solution (with some way to change socket identity) in a patch that
adds a java.net.HttpSocketImpl class similar to the
java.net.SocksSocketImpl class that's already used to tunnel through
SOCKS proxies? If not, in what other way should such a patch be done?

Thank you
Damjan Jovanovic

import java.net.*;
import java.io.*;
import java.lang.reflect.*;

public class TunnelProxy {
	private static Socket connectThroughHTTPProxy(String proxyHost, int
proxyPort, String destinationHost, int destinationPort) throws
Exception
	{
		URL destinationURL = new URL("http://" + destinationHost + ":" +
destinationPort);
		sun.net.www.protocol.http.HttpURLConnection conn =
			new sun.net.www.protocol.http.HttpURLConnection(
				destinationURL, new java.net.Proxy(java.net.Proxy.Type.HTTP, new
InetSocketAddress(proxyHost, proxyPort)));
		conn.setDoInput(true);
		conn.setDoOutput(true);
		conn.connect();
		conn.doTunneling();
		Field httpField = conn.getClass().getDeclaredField("http");
		httpField.setAccessible(true);
		sun.net.www.http.HttpClient httpClient =
(sun.net.www.http.HttpClient) httpField.get(conn);
		Field serverSocketField =
sun.net.NetworkClient.class.getDeclaredField("serverSocket");
		serverSocketField.setAccessible(true);
		Socket socket = (Socket) serverSocketField.get(httpClient);
		return socket;
	}

	public static void main(String[] args) throws Exception {
		System.setProperty("java.net.useSystemProxies", "true");
		InputStream in = connectThroughHTTPProxy(args[0],
Integer.parseInt(args[1]), args[2],
Integer.parseInt(args[3])).getInputStream();
		byte[] bytes = new byte[1024];
		int bytesRead;
		while ((bytesRead = in.read(bytes)) != -1) {
			System.out.print(new String(bytes));
		}
	}
}