class FixIP (object):
    """Middleware that sets the IP based on X-Forwarded-For. This is useful if you are sitting behind a reverse proxy."""
    def process_request(self, request):
        try:
            realip = request.META['HTTP_X_FORWARDED_FOR']
            realip = realip.split(",")[0]
            request.META['REMOTE_ADDR'] = realip
        except KeyError:
            return