Select different wsgi script based on subdomain in Apache?

Question

Is it possible to change the wsgi script used by an apache configuration based on the hostname of the request? I'd like to set up a system where various wsgi applications can be deployed and then run by simply using a subdomain to automatically map to the correct wsgi script. I'm mostly trying to avoid having to change the conf file every time another application is deployed.

<VirtualHost *:80>
    ServerName mysite.us
    ServerAlias *.mysite.us

    WSGIDaemonProcess mysite
    #can I use a different value here based on the domain?
    WSGIScriptAlias / /home/ubuntu/mysite/wsgi.py

    <Directory /home/ubuntu/mysite>
        WSGIProcessGroup mysite
        WSGIApplicationGroup %{GLOBAL}
        Order deny,allow
        Allow from all
    </Directory>
</VirtualHost>

Answer 1

Have you tried setting an environment variable captured from the request uri and assigning the WSGIScriptAlias path to that var?

Something like:

SetEnvIf HTTP_HOST "^(\w+).domain.tld" subdomain=$1

You may have to finesse it a little for your purposes, and you need apache2 to capture regex values with SetEnvIf.

http://httpd.apache.org/docs/2.2/mod/mod_setenvif.html#setenvif

Then you should be able to use that:

WSGIScriptAlias / /home/ubuntu/mysite/%{subdomain}.wsgi.py