RewriteRule with proxying?

Question

I'm setting up a RewriteRule, but at the moment it just redirects the browser. What I want is proxying, so that the user does not recognise the url changed behind.

I came around the P flag:

RewriteRule ^/(.*) ... [P]

which is the same as a ProxyPass statement.

Now: how do I make a ReverseProxyPass statement within my rewrite rule?

Answer 1

You don't, but you can often make it work the way you need it anyway.

First off, make sure you need to use RewriteRule instead of simply ProxyPass. The rule you've provided is quite simple; if you don't have some RewriteCond logic in front if it, then you can just as easily use ProxyPass.

In any case, let's take an example where you're doing something like this:

RewriteRule ^/proxied-location/(.*)$ http://backend/$1 [P]

So, you're taking a request for http://your-apache-server/proxied-location/something.html and sending it to the backend without the /proxied-location/ part of the URL.

A redirecting (30x) response would not include the /proxied-location/ part of the URL, despite the fact that the client needs that in order to access the other resource through the proxy. That's what ProxyPassReverse handles. So, just add a configuration like this:

ProxyPassReverse /proxied-location/ http://backend/

The config only applies on requests where the proxy backend handles the response, so the "conditions" that you've applied with mod_rewrite effectively still apply.

Make sense?