Django MiddleWare中间件

# 导入中间件
from django.utils.deprecation import MiddlewareMixin
from django.shortcuts import redirect


# 继承MiddlewareMixin
class LoginMiddleWare(MiddlewareMixin):
    # 进路由对应的方法之前
    def process_request(self, request):

        # 正常就返回None
        if request.path in ["/login/", "get_img"]:
            return None

        if not request.user.id:
            return redirect("/login/")

Request预处理函数: process_request(self, request)

View预处理函数: process_view(self, request, callback, callback_args,callback_kwargs) 

Template模版渲染函数：process_template_response()

Exception后处理函数:process_exception(self, request, exception)

process_exception() 应当返回None或HttpResponse对象。 

Response后处理函数:process_response(self, request, response)

 

# 在settings中的MIDDLEWARE添加
MIDDLEWARE = [
    'django.middleware.security.SecurityMiddleware',
    'django.contrib.sessions.middleware.SessionMiddleware',
    'django.middleware.common.CommonMiddleware',
    'django.middleware.csrf.CsrfViewMiddleware',
    'django.contrib.auth.middleware.AuthenticationMiddleware',
    'django.contrib.messages.middleware.MessageMiddleware',
    'django.middleware.clickjacking.XFrameOptionsMiddleware',
    "app01.utils.middlewares.LoginMiddleWare",
]