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));
                }
        }
}