apache - How do I redirect domain.com to WWW.domain.com under Django?

How do I go about redirecting all requests for domain.com/... to www.domain.com/... with a 301 in a django site?

Obviously this can't be done in urls.py because you only get the path part of the URL in there.

I can't use mod rewrite in .htaccess, because .htaccess files do nothing under Django (I think).

I'm guessing something in middleware or apache conf?

I'm running Django on a Linux server with Plesk, using mod WSGI

Answer

The WebFaction discussion someone pointed out is correct as far as the configuration, you just have to apply it yourself rather than through a control panel.

RewriteEngine On
RewriteCond %{HTTP_HOST} ^example.com$
RewriteRule (.*) http://www.example.com/$1 [R=301,L]

Put in .htaccess file, or in main Apache configuration in appropriate context. If inside of a VirtualHost in main Apache configuration, your would have ServerName be www.example.com and ServerAlias be example.com to ensure that virtual host handled both requests.

If you don't have access to any Apache configuration, if need be, it can be done using a WSGI wrapper around the Django WSGI application entry point. Something like:

import django.core.handlers.wsgi
_application = django.core.handlers.wsgi.WSGIHandler()

def application(environ, start_response):
  if environ['HTTP_HOST'] != 'www.example.com':
    start_response('301 Redirect', [('Location', 'http://www.example.com/'),])
    return []
  return _application(environ, start_response)

Fixing this up to include the URL within the site and dealing with https is left as an exercise for the reader. :-)