目录
一、介绍
二、自定义中间件
一、介绍
django的中间件（middleware），在django中，中间件其实就是一个类，在请求到来和结束后，django会根据自己的规则在合适的时机执行中间件中相应的方法。
在django项目的settings模块中，有一个MIDDLEWARE_CLASSES变量，其中每一个元素就是一个中间件
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‘, ‘wupeiqi.middleware.auth.Authentication‘, ]
与manage.py在一个目录下的文件夹wupeiqi/middleware下的auth.py文件中的Authentication类
中间件中可以定义四个方法，分别是：
process_request(self,request) process_view(self,request,callback,callback_args,callback_kwargs) process_template_response(self,reuqest,response) process_exception(self,request,exception) process_response(self,request,response)
以上的方法的房绘制可以是None和HttpResonse对象，如果是None，则继续按照django定义的规则向下执行，如果是HttpResonse对象，则直接将该对象返回给用户
二、自定义中间件
1.创建中间件
#!/usr/bin/env python
# _*_ coding:utf-8 _*_
# Author: JiaChen
from django.utils.deprecation import MiddlewareMixin
from django.shortcuts import HttpResponse
class Row1(MiddlewareMixin):
def process_request(self, request):
print("王森")
def process_view(self, request, view_func, view_func_args, view_func_kwargs):
print("张欣彤")
def process_response(self, request, response):
print("张扬")
return response
class Row2(MiddlewareMixin):
def process_request(self, request):
print("程义强")
def process_view(self, request, view_func, view_func_args, view_func_kwargs):
print("张旭耀")
def process_response(self, request, response):
print("侯亚凡")
return response
class Row3(MiddlewareMixin):
def process_request(self, request):
print("刘东")
def process_view(self, request, view_func, view_func_args, view_func_kwargs):
print("邵林")
def process_response(self, request, response):
print("廉志雷")
return response
def process_exception(self, request, exception):
if isinstance(exception, ValueError):
return HttpResponse("出现异常了...")
def process_template_response(self, request, response):
# 如果Views中的函数返回的对象中，具有render方法
print("-----------------")
return response
2.注册中间件
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‘, ‘Middle.m1.Row1‘, ‘Middle.m1.Row2‘, ‘Middle.m1.Row3‘, ]
时间： 2024-10-15 17:50:56