Is there a way to redirect a path in apache2 to another virtual host

I have several virtual hosts running on one machine, and I would like to override one path from one virtual host onto another. My original plan was to use mod rewrite, but I got stuck on the absolute URL.

I would like the following behavior, (without using 301 redirects.):

http://sub1.example.com/sub2 -> sub2.example.com virtual host
# Everything but sub2/.*
http://sub1.example.com/     -> sub1.example.com virtual host
http://sub2.example.com/     -> sub2.example.com virtual host

I was testing this out with the following configuration:

<VirtualHost *:80>
  <Directory /var/lib/wsgi>
    Order allow,deny
    Allow from all
   </Directory>

   ServerName sub1.example.com
   WSGIScriptAlias / /var/lib/wsgi/sub1.wsgi
   WSGIDaemonProcess sub1 display-name=%{GROUP}
   WSGIProcessGroup sub1

   RewriteEngine on
   RewriteRule ^/sub2/(.*)$ http://sub2.example.com/sub2/$1 [PT]

</VirtualHost>

<VirtualHost *:80>
  <Directory /var/lib/wsgi>
    Order allow,deny
    Allow from all
   </Directory>

   ServerName sub2.开发者_JS百科example.com
   WSGIScriptAlias / /var/lib/wsgi/sub2.wsgi
   WSGIDaemonProcess sub2 display-name=%{GROUP}
   WSGIProcessGroup sub2
</VirtualHost>

I am running a Python WSGI application in each subdomain. When you access http://sub1.example.com/sub2 apache2 returns "400 Bad Request" and puts this in the log file.

[Fri Jul 08 16:09:05 2011] [error] [client 127.0.0.1] Invalid URI in request GET /sub2/ HTTP/1.1

I have also tried using ServerPath inside of the sub2 domain, but that also doesn't work.

---

If you're not doing any url modification/fancy matching, why not try

<VirtualHost ...>
    // sub1 site
    Redirect /sub2 http://sub2.example.com
</VirtualHost>

mod_rewrite is heavy artillery when all you really need is a pea shooter.

That, or use an alias:

Alias /sub2   /full/path/to/equivalent/directory/in/sub2