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From "A. K." <>
Subject Re: [users@httpd] mod_rewrite: remembering environment variables
Date Fri, 01 Dec 2006 15:38:27 GMT

First of all, thanks for your responses. I've never had to "configure"
apache at all prior to this exercise so I'm fairly green in that regard. No
better place to start than mod_proxy and mod_rewrite, huh?

Anyways ....proxy server, yes. However, I can't use a real proxy because
filtering does not satisfy my requirements. The request needs to be
rewritten to the localhost script so it can be returned to the client as
part of an HTML frameset. For instance, a request for gets
displayed in the browser as part of an HTML frameset with the original
request for google being just one of the frames and otherwise unaltered.
More stuff happens than just that in the script but the framing is the main

BTW, I guess I was using HTTP_HOST and SERVER_NAME interchangeably. Sorry
for the confusion, I wasn't expecting them to be different.

So I guess the question would be, is there a way to do this with just
mod_proxy, mod_rewrite and a Perl script? Or I have to cobble
something from scratch in C and not use apache at all?

On 11/30/06, Joshua Slive <> wrote:
> On 11/30/06, A. K. <> wrote:
> > iptables redirects to the VirtualHost which rewrites to the script
> housed on
> > localhost. The script does some processing then "re-requests" the
> original
> > request based on the parameters and query string passed to it.
> >
> > will display just fine except for the logo image which gets
> > re-written to
> >
> > If I add a third rule, "RewriteRule (.*)$1 [P]",
> the
> > image is fetched appropriately. The question is how do I dynamically
> > determine what the appropriate HTTP_HOST should be?
> >
> > Is my approach "fixable"? Or should I be attacking this differently?
> Seems crazy to me.  I guess you are using this as a proxy server?  Why
> not use a real proxy with some filtering (if necessary) to make any
> changes to want.
> And I don't understand your setup because you seem to imply that there
> is a difference between SERVER_NAME and HTTP_HOST.  Why is that the
> case?  The SERVER_NAME is already passed in the request, so why not
> use that?
> Anyway, back to your original question, environment variables won't do
> you any good because you are using external redirects.  That means an
> entirely new request will be created with entirely new environment
> variables.  If you really need to pass the HTTP_HOST, then pass it in
> the query string as you are doing with SERVER_NAME.
> Joshua.
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