登入认证

class Administrator(models.Model):
    username = models.CharField(max_length=32)
    password = models.CharField(max_length=32)

#登入函数 根据post请求拿到用户信息，从数据库验证后将session的 is_login字段设置成True,并返回默认首页
def login(request):
    message = ""
    v = request.session
    print(type(v))
    from django.contrib.sessions.backends.db import SessionStore
    if request.method == "POST":
        user = request.POST.get(‘user‘)
        pwd = request.POST.get(‘pwd‘)

        c = models.Administrator.objects.filter(username=user, password=pwd).count()
        if c:
            request.session[‘is_login‘] = True
            request.session[‘username‘] = user
            rep = redirect(‘/index.html‘)
            return rep
        else:
            message = "用户名或密码错误"
    obj = render(request,‘login.html‘, {‘msg‘: message})
    return obj
#注销函数  清除session信息
def logout(request):
    request.session.clear()
    return redirect(‘/login.html‘)

#验证装饰器
def auth(func):
    def inner(request, *args, **kwargs):
        is_login = request.session.get(‘is_login‘)
        if is_login:
            return func(request, *args, **kwargs)
        else:
            return redirect(‘/login.html‘)
    return inner

#进入首页时需要验证用户是否登入
@auth   
def index(request):
    pass

from django.views import View
from django.contrib.auth.mixins import LoginRequiredMixin
from  django.contrib import auth
from django.contrib.auth.decorators import login_required

def login(request):
    if request.method=="GET":
        error_msg="请登录"
        return render(request,‘index/login.html‘,{"error_msg":error_msg})
    if request.method=="POST":
        username = request.POST.get("username", "")
        password = request.POST.get("password", "")
        #验证用户名密码 
        user=auth.authenticate(username=username,password=password)    
        if user:
            #验证后用户登入
            auth.login(request,user)
            return render(‘index.html‘)
            # auth.logout()  用户退出

#CBV 模式的认证  继承系统的认证视图
class index(LoginRequiredMixin,View):
     def get(request):
         pass

#FBV 模式的认证   django自带的装饰器
@login_required
def index(request):

    pass