如何只允许特定国家的用户访问我的django网站？

GEOIP_PATH = '/path/to/geoip/database'

from django.shortcuts import redirect
from django.conf import settings
from geoip2 import database

class CountryMiddleware:
    def __init__(self, get_response):
        self.get_response = get_response
        self.geoip_reader = database.Reader(settings.GEOIP_PATH)

    def __call__(self, request):
        ip_address = request.META.get('REMOTE_ADDR')
        try:
            country = self.geoip_reader.country(ip_address).country.iso_code
            allowed_countries = ['US', 'CA']  # 允许访问的国家代码列表
            if country not in allowed_countries:
                return redirect('access_denied')  # 重定向到访问被拒绝页面
        except:
            pass

        response = self.get_response(request)
        return response

MIDDLEWARE = [
    ...
    'yourapp.country_middleware.CountryMiddleware',
    ...
]