Django 限制用户访问频率的中间件的实现

框架(架构)  /  管理员 发布于 7年前   187

一、定义限制访问频率的中间件

common/middleware.py

import timefrom django.utils.deprecation import MiddlewareMixinMAX_REQUEST_PER_SECOND=2 #每秒访问次数class RequestBlockingMiddleware(MiddlewareMixin):  def process_request(self,request):    now=time.time()    request_queue = request.session.get('request_queue',[])    if len(request_queue) < MAX_REQUEST_PER_SECOND:      request_queue.append(now)      request.session['request_queue']=request_queue    else:      time0=request_queue[0]      if (now-time0)<1:        time.sleep(5)      request_queue.append(time.time())      request.session['request_queue']=request_queue[1:]

二、将中间件加入配置文件

setting.py

MIDDLEWARE = [  'django.middleware.security.SecurityMiddleware',  'django.contrib.sessions.middleware.SessionMiddleware',  'django.middleware.common.CommonMiddleware',  'django.middleware.csrf.CsrfViewMiddleware',  'common.middleware.RequestBlockingMiddleware', #在sessions之后，auth之前  'django.contrib.auth.middleware.AuthenticationMiddleware',  'django.contrib.messages.middleware.MessageMiddleware',  'django.middleware.clickjacking.XFrameOptionsMiddleware',]

对使用 rest_framework 框架的项目来说，可以使用框架的设置来对api的访问频率进行限制

REST_FRAMEWORK = {'DEFAULT_PARSER_CLASSES': ('rest_framework.parsers.JSONParser','rest_framework.parsers.FormParser','rest_framework.parsers.MultiPartParser',),'DEFAULT_AUTHENTICATION_CLASSES': (# 'lecare.core.rest_auth.CrossSiteSessionAuthentication',),'DEFAULT_PERMISSION_CLASSES': [# 'rest_framework.permissions.IsAuthenticated','rest_framework.permissions.AllowAny',],'PAGE_SIZE': 20,'UNICODE_JSON': False,# 'COERCE_DECIMAL_TO_STRING': False,# 'EXCEPTION_HANDLER': 'lecare.core.custom_exception_handler.custom_exception_handler','JWT_EXPIRATION_DELTA': datetime.timedelta(hours = 2),'JWT_REFRESH_EXPIRATION_DELTA': datetime.timedelta(days = 360),'JWT_ALLOW_REFRESH': False,'JWT_AUTH_HEADER_PREFIX': 'JWT','JWT_PAYLOAD_HANDLER': 'consumer.jwt_conf.jwt_payload_handler','JWT_RESPONSE_PAYLOAD_HANDLER': 'consumer.jwt_conf.jwt_response_payload_handler','JWT_GET_USER_SECRET_KEY': 'consumer.jwt_conf.jwt_get_secret_key',# 'DEFAULT_THROTTLE_CLASSES': (# # 开启匿名用户接口请求频率限制# 'rest_framework.throttling.AnonRateThrottle',# # 开启授权用户接口请求频率限制# 'rest_framework.throttling.UserRateThrottle'# ),# 'DEFAULT_THROTTLE_RATES': {# # 频率限制有second, minute, hour, day# # 匿名用户请求频率# 'anon': '30/second',# # 授权用户请求频率# 'user': '30/second'# }}

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