class Throttle(MiddlewareMixin):

    def process_request(self, request):

        # 1. 拿到用户请求的IP

        # print(request.META)

        ip = request.META.get("REMOTE_ADDR")

        # 2. 当前请求的时间

        now = time.time()

        # 3. 记录访问的历史

        if ip not in VISIT_RECORD:

            VISIT_RECORD[ip] = []

        history = VISIT_RECORD[ip]

        # [11:07:20, 10:07:11, 10:07:06, 10:07:01]

        while history and now - history[-1] > 10:

            history.pop()

        # 判断用户在一分钟的时间间隔内是否访问超过3次

        if len(history) >= 3:

            return HttpResponse("滚...")

        history.insert(0, now)