python - @csrf_exempt does not work on generic view based class

Question

class ChromeLoginView(View):

     def get(self, request):
          return JsonResponse({'status': request.user.is_authenticated()})

     @method_decorator(csrf_exempt)
     def post(self, request):
          username = request.POST['username']
          password = request.POST['password']
          user = authenticate(username=username, password=password)
          if user is not None:
                if user.is_active:
                     login(request, user)
                     return JsonResponse({'status': True})
          return JsonResponse({'status': False})

I am expecting that the post does stopped by csrf, but it return 403 error.

But if remove that decorator and do this in the URLConf

url(r'^chrome_login/', csrf_exempt(ChromeLoginView.as_view()), name='chrome_login'),

it will work.

What happened here? didn't it supposed to work, because I guess that's what method_decorator do. I'm using python3.4 and django1.7.1

Any advice would be great.

Answer 1

As @knbk said, this is the dispatch() method that must be decorated.

Since Django 1.9, you can use the method_decorator directly on a class:

from django.utils.decorators import method_decorator

@method_decorator(csrf_exempt, name='dispatch')
class ChromeLoginView(View):

    def get(self, request):
        return JsonResponse({'status': request.user.is_authenticated()})

    def post(self, request):
        username = request.POST['username']
        password = request.POST['password']
        user = authenticate(username=username, password=password)
        if user is not None:
            if user.is_active:
                login(request, user)
                return JsonResponse({'status': True})
        return JsonResponse({'status': False})

This avoids overriding the dispatch() method only to decorate it.