class SubdomainMiddleware(object):
    def process_request(self, request):
	if request.is_ajax():
	    return None
	try:
	    site = Site.objects.get_current()
	except:
	    return None
	host = request.get_host()
	if host != site.domain:
	    full_uri = '%s://%s%s' % (request.is_secure() and 'https' or 'http', site.domain, request.get_full_path())
	    if host.endswith('.' + site.domain):
		subdomain = host[:host.index('.')].replace('-', '_')
		if subdomain not in settings.DENIED_SUBDOMAINS:
		    try:
			callback, callback_args, callback_kwargs = resolve(request.path, settings.SUBDOMAINS_ROOT_URLCONF)
		    except Resolver404, e:
			return HttpResponseRedirect(full_uri)
		    except Exception, e:
			if settings.DEBUG:
			    return technical_500_response(request, *exc_info())
			return server_error(request)
		    else:
			callback_kwargs.update({'user': subdomain})
			try:
			    return callback(request, *callback_args, **callback_kwargs)
			except Exception, e:
			    if settings.DEBUG:
				return technical_500_response(request, *exc_info())
			    return server_error(request)
	    return HttpResponseRedirect(full_uri)