Django-website 程序案例系列-10 验证装饰器

FBV装饰器：

def auth(func):     #装饰器函数
    def inner(request, *args, **kwargs):
        v = request.COOKIES.get(‘username‘)
        if not v:
            return redirect(‘/log/‘)
        return func(request, *args, **kwargs)
    return inner

使用方法：

在函数上加上@auth

CBV装饰器：

第一种方式：利用django自带的工具

def auth(func):         #装饰器函数  对cookie进行认证
    def inner(request, *args, **kwargs):
        v = request.COOKIES.get(‘username‘)
        if not v:
            return redirect(‘/log/‘)
        return func(request, *args, **kwargs)
    return inner

from django import views
from django.utils.decorators import method_decorator  #导入django自带的工具
class Auth(views.View):

    @method_decorator(auth)  #利用django自带工具 导入认证函数装饰器进行认证，灵活的放在任意需要认证的函数下面
    def get(self, request):
        v = request.COOKIES.get(‘username‘)
        return render(request, ‘user_list.html‘, {‘current_user‘: v})

    def post(self, request):
        v = request.COOKIES.get(‘username‘)
        return render(request, ‘user_list.html‘, {‘current_user‘: v})

第二种方式：

from django import views
from django.utils.decorators import method_decorator
class Auth(views.View):

    @method_decorator(auth)     #将装饰器放在父类方法上 这样该类下所有方法都被装饰上了装饰器，不用一一在写在函数上面
    def dispatch(self, request, *args, **kwargs):
        return super(Auth, self).dispatch(self, request, *args, **kwargs)

    def get(self, request):
        v = request.COOKIES.get(‘username‘)
        return render(request, ‘user_list.html‘, {‘current_user‘: v})

    def post(self, request):
        v = request.COOKIES.get(‘username‘)
        return render(request, ‘user_list.html‘, {‘current_user‘: v})

第三种方式：

from django import views
from django.utils.decorators import method_decorator

@method_decorator(auth, name=‘dispatch‘)  #将装饰器直接装饰在类上面，在用name指定装饰在父类的diapatch方法上，这样也就实现了类里面所有方法的装饰效果
class Auth(views.View):

    def get(self, request):
        v = request.COOKIES.get(‘username‘)
        return render(request, ‘user_list.html‘, {‘current_user‘: v})

    def post(self, request):
        v = request.COOKIES.get(‘username‘)
        return render(request, ‘user_list.html‘, {‘current_user‘: v})