Cookie:

1.保存在用户浏览器

2.可以主动清除

3.可以被伪造

4.跨域名 Cookie 不共享

---

创建一个项目：user_manager 和应用： app01

创建数据库，添加 models.py

from django.db import models# Create your models here.class Classes(models.Model):    caption = models.CharField(max_length=32)class Student(models.Model):    name = models.CharField(max_length=32)    cls = models.ForeignKey(Classes, on_delete=models.CASCADE)class Teacher(models.Model):    name = models.CharField(max_length=32)    cls = models.ForeignKey(Classes, on_delete=models.CASCADE)class Administrator(models.Model):    username = models.CharField(max_length=32)    password = models.CharField(max_length=32)

修改 urls.py

from django.contrib import adminfrom django.urls import pathfrom app01 import viewsurlpatterns = [    path('admin/', admin.site.urls),    path('login.html', views.login),    path('index.html', views.index),]

在 templates 文件夹下创建两个 html 文件

# login.html    
        
    
         {% csrf_token %}    
     
        
      用户名:         
          
     
    
     
        
      密码:         
          
     
    
     
        
              
              
      {
   { msg }}    
     
    
# index.html    
        
 Hello {
   { username }} 

添加 views.py

from django.shortcuts import render, redirect# Create your views here.from app01 import modelsdef login(req):    # models.Administrator.objects.create(    #     username='klvchen',    #     password='klvchen'    # )    message = ""    if req.method == "POST":        user = req.POST.get('user')        pwd = req.POST.get('pwd')        c = models.Administrator.objects.filter(username=user, password=pwd).count()        if c:            rep = redirect('index.html')            rep.set_cookie('username', user)            return rep        else:            message = "用户名或密码错误"    return render(req, 'login.html', {'msg': message})def index(req):    username = req.COOKIES.get('username')    if username:        return render(req, 'index.html', {'username': username})    else:        return redirect('/login.html')

初始化数据库

python manage.py makemigrationspython manage.py migrate

启动

python manage.py runserver 8000

访问

输入错误的用户名或密码

输入正确的用户名和密码