class IpAddressMiddleware:
    def __init__(self, get_response):
        self.get_response = get_response

    def __call__(self, request):
        ip_address = None
        try:
            ip_address = request.META['REMOTE_ADDR']
        except KeyError:
            ip_address = request.META['HTTP_X_REAL_IP']

        request.ip_address = ip_address
        response = self.get_response(request)

        return response