Django MiddleWare Middleware

# Import middleware 
from django.utils.deprecation Import MiddlewareMixin
 from django.shortcuts Import the redirect 


# Inherited MiddlewareMixin 
class LoginMiddleWare (MiddlewareMixin):
     # before entering the corresponding routing method 
    DEF process_request (Self, Request): 

        # normal return None 
        IF Request. path in [ " / the Login / " , "get_img" ]:
             return None 

        IF  not request.user.id:
             return redirect ( " / the Login / ")

 

Pretreatment Request Function: process_request (self, request)

Pretreatment View function: process_view (self, request, callback, callback_args, callback_kwargs) 

Template template rendering function: process_template_response ()

After Exception handler: process_exception (self, request, exception)

process_exception () should return None or HttpResponse object. 

Response function after treatment: 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",
]