django的FBV和CBV的装饰器例子

备忘

def auth(func):
    def inner(request,*args,**kwargs):
        u = request.COOKIES.get('username111')
        if not u:
            return redirect('/login/')
        print("call index()")
        return func(request,*args,**kwargs)
    return inner

#FBV
@auth
def index(request):

    #带签名的cookie
    obj = HttpResponse('')
    obj.set_signed_cookie('username','',salt='adasaa')#salt加盐，设置cookie，加密
    request.get_signed_cookie('username','',salt='adasaa')#获取cookie

    u = request.COOKIES.get('username111')
    if not u:
        return redirect('/login/')
    else:
        return render(request,'index.html',{'u':u})

#CBV
from django.views import View
from django.utils.decorators import method_decorator
class Order(View):

    @method_decorator(auth)
    def get(self,request):
        u = request.COOKIES.get('username111')
        return render(request, 'index.html', {'u': u})

    def post(self,request):
        u = request.COOKIES.get('username111')
        if not u:
            return redirect('/login/')
        else:
            return render(request, 'index.html', {'u': u})

CBV如果有很多方法，都要加装饰器的话，可以加在dispatch方法上，这样类里面的方法就不用再一一加上装饰了

def auth(func):
    def inner(request,*args,**kwargs):
        u = request.COOKIES.get('username111')
        if not u:
            print("未登陆")
            return redirect('/login/')
        print("call now")
        return func(request,*args,**kwargs)
    return inner

#FBV
@auth
def index(request):

    #带签名的cookie
    obj = HttpResponse('')
    obj.set_signed_cookie('username','',salt='adasaa')#salt加盐，设置cookie，加密
    request.get_signed_cookie('username','',salt='adasaa')#获取cookie

    u = request.COOKIES.get('username111')
    if not u:
        return redirect('/login/')
    else:
        return render(request,'index.html',{'u':u})

#CBV
from django.views import View
from django.utils.decorators import method_decorator
class Order(View):

    @method_decorator(auth)
    def dispatch(self, request, *args, **kwargs):
        return super(self,Order).dispatch(request, *args, **kwargs)

    def get(self,request):
        u = request.COOKIES.get('username111')
        return render(request, 'index.html', {'u': u})

    def post(self,request):
        u = request.COOKIES.get('username111')
        if not u:
            return redirect('/login/')
        else:
            return render(request, 'index.html', {'u': u})

再来一个终极版的，不用重写dispatch，直接加在类上面：

def auth(func):
    def inner(request,*args,**kwargs):
        u = request.COOKIES.get('username111')
        if not u:
            print("未登陆")
            return redirect('/login/')
        print("call now")
        return func(request,*args,**kwargs)
    return inner

#FBV
@auth
def index(request):

    #带签名的cookie
    obj = HttpResponse('')
    obj.set_signed_cookie('username','',salt='adasaa')#salt加盐，设置cookie，加密
    request.get_signed_cookie('username','',salt='adasaa')#获取cookie

    u = request.COOKIES.get('username111')
    if not u:
        return redirect('/login/')
    else:
        return render(request,'index.html',{'u':u})

#CBV
from django.views import View
from django.utils.decorators import method_decorator

@method_decorator(auth,name='dispatch')
class Order(View):

    # @method_decorator(auth)
    # def dispatch(self, request, *args, **kwargs):
    #     return super(self,Order).dispatch(request, *args, **kwargs)

    def get(self,request):
        u = request.COOKIES.get('username111')
        return render(request, 'index.html', {'u': u})

    def post(self,request):
        u = request.COOKIES.get('username111')
        if not u:
            return redirect('/login/')
        else:
            return render(request, 'index.html', {'u': u})