Hi Damjan,
Actually, I did some work on this back in 2006 (!), but never finished
it. I brought the changes into a mercurial repository and created a webrev:
http://cr.openjdk.java.net/~chegar/6370908/webrev.00/webrev/
Basically, this change provides the basic functionality, without any
frills, authentication, etc. I think for tunneling sockets through a
HTTP proxy it should be sufficient. Do you require authentication in
your environment?
To have authentication supported we would need to restructure the HTTP
protocol handler in sun.net.www.protocol.http.HttpURLConnection, so that
we can take advantage of the authentication schemes it already supports.
Not a big deal, just needs to be done.
-Chris.
On 21/02/2010 13:09, Damjan Jovanovic wrote:
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));
}
}
}
