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参考资料

B站网课：点击蓝色字体跳转
或复制链接至浏览器：https://www.bilibili.com/video/BV1vK4y1o7jH?p=39&vd_source=597e21cf34ffcdce468ba00be2177e8a

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中间件

请求——输入
响应——输出

注册中间件

mysite3-new-directory-middleware
middleware-new-pythonfile-__init__双下划线
middleware-new-pythonfile-mymiddleware

settings.py

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',
    'middleware.mymiddleware.MyMW',
]

middleware/mymiddleware.py

from django.utils.deprecation import MiddlewareMixin


class MyMW(MiddlewareMixin):

    def process_request(self,request):

        print('MyMW process_request do ---')

    def process_view(self,request,callback,callback_args,callback_kwargs):

        print('MyMW process_views do ---')

    def process_response(self,request,response):

        print('MyMW process_response do ---')
        return response

mysite3/views.py

def test_mw(request):
    print('---test_mw view in ---')
    return HttpResponse('--test-mw---')

mysite3/urls.py

path('test_mw',views.test_mw),

多个中间件的执行顺序：请求时先注册的先执行，响应时先注册的后执行

练习

（持续更新中）

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