django 사용자 정의 중간부품 접근 주파수 제한 및 IP 비활성화

import time
from django.http import HttpResponse

# Create your views here.
VISIT_LIMIT = 20
TIME_INTERVAL = 10
RETRY_TIME = 10
IP_BLACKLIST = ["192.168.1.2", "127.0.0.1"]

class LimitMiddleware:
    def __init__(self, get_response):
        self.get_response = get_response
        # One-time configuration and initialization.

    def __call__(self, request):
        #      (url   )  
        # Code to be executed for each request before
        # the view (and later middleware) are called.

        now = time.time()
        print("     (url   )  ",now)
        request_queue = request.session.get("request_queue", [])
        request_limit = request.session.get("request_limit", 0)
        remot_addr = request.META.get("REMOTE_ADDR", "")

        #     IP     ，        
        if remot_addr in IP_BLACKLIST:
            return HttpResponse("  IP    ，         ")

        #        ，     
        if request_limit:
            time.sleep(1)
            visit_limit =  now - request.session["request_queue"][-1]

            if visit_limit >= request_limit:
                request_limit = 0
                visit_limit = 0
                request.session["request_limit"] = request_limit
                request.session["request_queue"] = []

            return HttpResponse("%d    "%(request_limit - visit_limit))

        if request_queue == []:
            request_queue.append(now)
            request.session["request_queue"] = request_queue
        else:
            request_queue.append(now)
            request.session["request_queue"] = request_queue

        # TIME_INTERVAL      VISIT_LIMIT ,         
        if len(request_queue) >= VISIT_LIMIT:
            if request_queue[0] - request_queue[-1] <= TIME_INTERVAL:
                request.session["request_limit"] = RETRY_TIME
                return HttpResponse("    ,%d    "%(RETRY_TIME))
            else:
                request_queue = []
                request.session["request_queue"] =  request_queue


        response = self.get_response(request)
        #        ，           
        # Code to be executed for each request/response after
        # the view is called.

        return response

    # url            
    def process_view(request, view_func, *view_args, **view_kwargs):
        print("     ：process_view")
        # return HttpResponse("        ")

    def process_exception(request, exception, *args):
        print("      ....",*args)
        return HttpResponse("      ....%")

MIDDLEWARE = [
    'django.middleware.security.SecurityMiddleware',
    'django.contrib.sessions.middleware.SessionMiddleware',
    'django.middleware.common.CommonMiddleware',
    'django.middleware.csrf.CsrfViewMiddleware',
    "frequencylimit.frequencylimitmiddleware.LimitMiddleware",
    'django.contrib.auth.middleware.AuthenticationMiddleware',
    'django.contrib.messages.middleware.MessageMiddleware',
    'django.middleware.clickjacking.XFrameOptionsMiddleware',
]