Django基础五之中间件
1.在项目中新建一个文件夹．命名为middleware.放进app01中,并新建一个py.命名为middleware.py
2.在middleware.py中写中间件.包含中间件请求时.用session.这样就不用装饰器。
# _*_ coding : UTF-8 _*_
#开发团队：zeng
#开发人员：
#开发时间：2020/7/31 11:06
#文件名称：middleware.py
#开发工具：PyCharm
from django.utils.deprecation import MiddlewareMixin
from django.shortcuts import HttpResponse,redirect
from django.urls import reverse
class M1(MiddlewareMixin):
# 白名单
write_list = [reverse('login')]
def process_request(self,request):
print('请求来了')
path = request.path
print(path)
if path not in self.write_list:
status = request.session.get('is_login')
print(status)
if not status:
return redirect('/login/')
# 第二种
# def process_request(self, request):
# write_list = [reverse('login')]
# print('请求来了')
# path = request.path
# print(path)
# if path in write_list:
# self.__count = 0
# return None
# else:
#
# status = request.session.get('is_login')
# print(status)
# if status:
# return None
# else:
# return redirect(reverse('login'))
def process_response(self,request,response):
print('响应要走了')
return response
3.在settings.py中把中间件注册
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.middleware.middleware.M1',
]
from django.shortcuts import render,HttpResponse,redirect
from app01 import models
# Create your views here.
# def wapper(f):
#
# def inner(request,*args,**kwargs):
# print(request.COOKIES)
# is_login = request.COOKIES.get('is_login')
# if is_login == 'True':
# ret = f(request,*args,**kwargs)
# return ret
#
# else:
# return redirect('login')
#
# return inner
#
# # @wapper
# def books(request):
# if request.method == 'GET':
# book_obj = models.Book.objects.all()
# return render(request,'books.html',{'book_obj':book_obj})
#
# # @wapper
# def add_book(request):
# if request.method == 'GET':
# publish_all = models.Publish.objects.all()
# author_all = models.Author.objects.all()
# return render(request,'add_book.html',{'publish_all':publish_all,'author_all':author_all})
#
# else:
# print(request.POST)
# authons_obj = request.POST.getlist('authors')
# # print(authons_obj)
#
# data_obj = request.POST.dict()
# del data_obj['csrfmiddlewaretoken']
# del data_obj['authors']
#
# new_data_obj = models.Book.objects.create(
# **data_obj
# )
# new_data_obj.authors.add(*authons_obj)
#
# return redirect('books')
#
#
# # @wapper
# def edit_book(request,book_id):
# book_obj = models.Book.objects.filter(pk=book_id)
# if request.method == 'GET':
# book_obj = book_obj.first()
# publish_obj = models.Publish.objects.all()
# authors_obj = models.Author.objects.all()
#
# return render(request,'edit_book.html',{'book_obj':book_obj,'publish_obj':publish_obj,'authors_obj':authors_obj})
#
# else:
# print(request.POST)
# author_obj = request.POST.getlist('authors')
# data_obj = request.POST.dict()
# del data_obj['csrfmiddlewaretoken']
# del data_obj['authors']
# book_obj.update(
# **data_obj
# )
# book_obj.first().authors.set(author_obj)
#
# return redirect('books')
#
# # @wapper
# def del_book(request,book_id):
# models.Book.objects.filter(pk=book_id).delete()
# return redirect('books')
#
#
# # cookie
#
#
# # def login(request):
# # if request.method =='GET':
# # return render(request,'login.html')
# #
# # else:
# # # print(request.POST)
# # username = request.POST.get('username')
# # pwd = request.POST.get('password')
# #
# # if username =='123' and pwd == '123':
# # print('ok')
# # ret = redirect('books')
# # ret.set_cookie('is_login',True,10) #100秒是超过后失效
# # return ret
# # else:
# #
# #
# # return redirect('login')
#=================================================================================================================
# session 模式
# 用于用户检验,短信验证过期,权限管理
# session 模式的装饰器
# def wapper(f):
#
# def inner(request,*args,**kwargs):
# print(request.session)
# # is_login = request.COOKIES.get('is_login')
# is_login = request.session.get('is_login')
# if is_login == True:
# ret = f(request,*args,**kwargs)
# return ret
#
# else:
# return redirect('login')