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Date:Mon Jun 12 22:32:14 2001 
Subject:Re: sys_open_url and proxies 
From:Chris Double 
Volume-ID:1010612.03 

"Anthony Worrall (ISG)" <Anthony.Worrall@Reading.ac.uk> writes:

> Before I start rewriting the code has anyone got sys_open_url to
> work with http proxies or indeed know the commands I need to use to
> authenticate with the proxy. The HTTP specification did not seem to
> have this information ;-(.

Does the proxy require authentication? If not you can probably adapt
the Lisp or Dylan code I use for working through proxy servers. See:

  http://www.double.co.nz/cl
  http://www.double.co.nz/dylan

Look for the Dylan proxy-sockets or the Lisp Sockets package. The SSL
sockets package for both languages shows how to tunnel SSL through a
proxy.

It also depends on your proxy server. Do you know what it is? If it is
a Microsoft Proxy Server 2.0 it might be using NTLM authentication
which is harder to work through. In that case I'd recommend using
something like an HTTP Proxy instead:

  http://www.htthost.com

Chris.
-- 
http://www.double.co.nz/dylan