mod_rewrite/656: Problem with mod_rewrite and proxy requests

[Lars Eilebrecht <sf...@unix-ag.org>]

>Number:         656
>Category:       mod_rewrite
>Synopsis:       Problem with mod_rewrite and proxy requests
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    apache (Apache HTTP Project)
>State:          open
>Class:          sw-bug
>Submitter-Id:   apache
>Arrival-Date:   Mon Jun  2 09:20:00 1997
>Originator:     sfx@unix-ag.org
>Organization:
apache
>Release:        1.2b10
>Environment:
SunOS 5.4 generic sun4m sparc
>Description:
I'm not sure it it's really a problem/bug of mod_rewrite, but here's the
description.

When I use [P]-redirects everything is fine unless I activate
a parent cache via 'ProxyRemote'.

My test configuration:

  RewriteRule ^/test(.*)$ http://www.si.unix-ag.org/foobar$1 [P]

and

  ProxyRemote * http://www-cache.uni-siegen.de:3128


When I access the URL-Path /test/ the Apache (mod_proxy) issues the
request:

  GET /test/ HTTP/1.0
  Host: www.si.unix-ag.org

But this request is wrong, because /test/ is the _local_ URL-path but
not the URL-path of the remote server which is - in this test - 
http://www.si.unix-ag.org/foobar/.

When I disable ProxyRemote the correct page is retrieved...

The reason why I'm using mod_rewrite as the category of this bug report
is that it's very strange that mod_proxy sees the local URL that is
used in the RewriteRule directive.

Please note that I reported a very similar bug with ProxyRemote
several weeks ago.

P.S.: The parent proxy mentioned in the above example is a Squid-Cache
       (1.1.10), but I also used a dummy daemon to check the request
       Apache made. So it's not a problem with the parent cache itself,
       because the syntax of the request is ok, but contains the wrong
       URL-Path.
>How-To-Repeat:

>Fix:

>Audit-Trail:
>Unformatted: