I know that there are answers regarding Django Rest Framework, but I couldn't find a solution to my problem.
I have an application which has authentication and some functionality.
I added a new app to it, which uses Django Rest Framework. I want to use the library only in this app. Also I want to make POST request, and I always receive this response:
{
"detail": "CSRF Failed: CSRF token missing or incorrect."
}
I have the following code:
# urls.py
from django.conf.urls import patterns, url
urlpatterns = patterns(
'api.views',
url(r'^object/$', views.Object.as_view()),
)
# views.py
from rest_framework.views import APIView
from rest_framework.response import Response
from django.views.decorators.csrf import csrf_exempt
class Object(APIView):
#csrf_exempt
def post(self, request, format=None):
return Response({'received data': request.data})
I want add the API without affecting the current application.
So my questions is how can I disable CSRF only for this app ?
Note: Disabling CSRF is unsafe from security point of view. Please use your judgement to use the below method.
Why this error is happening?
This is happening because of the default SessionAuthentication scheme used by DRF. DRF's SessionAuthentication uses Django's session framework for authentication which requires CSRF to be checked.
When you don't define any authentication_classes in your view/viewset, DRF uses this authentication classes as the default.
'DEFAULT_AUTHENTICATION_CLASSES'= (
'rest_framework.authentication.SessionAuthentication',
'rest_framework.authentication.BasicAuthentication'
),
Since DRF needs to support both session and non-session based authentication to the same views, it enforces CSRF check for only authenticated users. This means that only authenticated requests require CSRF tokens and anonymous requests may be sent without CSRF tokens.
If you're using an AJAX style API with SessionAuthentication, you'll need to include a valid CSRF token for any "unsafe" HTTP method calls, such as PUT, PATCH, POST or DELETE requests.
What to do then?
Now to disable csrf check, you can create a custom authentication class CsrfExemptSessionAuthentication which extends from the default SessionAuthentication class. In this authentication class, we will override the enforce_csrf() check which was happening inside the actual SessionAuthentication.
from rest_framework.authentication import SessionAuthentication, BasicAuthentication
class CsrfExemptSessionAuthentication(SessionAuthentication):
def enforce_csrf(self, request):
return # To not perform the csrf check previously happening
In your view, then you can define the authentication_classes to be:
authentication_classes = (CsrfExemptSessionAuthentication, BasicAuthentication)
This should handle the csrf error.
Easier solution:
In views.py, use django-braces' CsrfExemptMixin and authentication_classes:
# views.py
from rest_framework.views import APIView
from rest_framework.response import Response
from django.views.decorators.csrf import csrf_exempt
from braces.views import CsrfExemptMixin
class Object(CsrfExemptMixin, APIView):
authentication_classes = []
def post(self, request, format=None):
return Response({'received data': request.data})
Modify urls.py
If you manage your routes in urls.py, you can wrap your desired routes with csrf_exempt() to exclude them from the CSRF verification middleware.
import views
from django.conf.urls import patterns, url
from django.views.decorators.csrf import csrf_exempt
urlpatterns = patterns('',
url(r'^object/$', csrf_exempt(views.ObjectView.as_view())),
...
)
Alternatively, as a Decorator
Some may find the use of the #csrf_exempt decorator more suitable for their needs
for instance,
from django.views.decorators.csrf import csrf_exempt
from django.http import HttpResponse
#csrf_exempt
def my_view(request):
return HttpResponse('Hello world')
should get the Job Done!
For all who did not find a helpful answer. Yes DRF automatically removes CSRF protection if you do not use SessionAuthentication AUTHENTICATION CLASS, for example, many developers use only JWT:
'DEFAULT_AUTHENTICATION_CLASSES': (
'rest_framework_jwt.authentication.JSONWebTokenAuthentication',
),
But issue CSRF not set may be occurred from some another reason, for exmple you not correctly added path to you view:
url(r'^api/signup/', CreateUserView), # <= error! DRF cant remove CSRF because it is not as_view that does it!
instead of
url(r'^api/signup/', CreateUserView.as_view()),
I tried a few of the answers above and felt creating a separate class was a little overboard.
For reference, I ran into this problem when trying to update a function based view method to a class based view method for user registration.
When using class-based-views (CBVs) and Django Rest Framework (DRF), Inherit from the ApiView class and set permission_classes and authentication_classes to an empty tuple. Find an example below.
class UserRegistrationView(APIView):
permission_classes = ()
authentication_classes = ()
def post(self, request, *args, **kwargs):
# rest of your code here
If you do not want to use session based authentication, you can remove Session Authentication from REST_AUTHENTICATION_CLASSES and that would automatically remove all csrf based issues. But in that case Browseable apis might not work.
Besides this error should not come even with session authentication. You should use custom authentication like TokenAuthentication for your apis and make sure to send Accept:application/json and Content-Type:application/json(provided you are using json) in your requests along with authentication token.
You need to add this to prevent default session authentication: (settings.py)
REST_FRAMEWORK = {
'DEFAULT_AUTHENTICATION_CLASSES': (
'rest_framework.authentication.TokenAuthentication',
),
'DEFAULT_PERMISSION_CLASSES': (
'rest_framework.permissions.IsAuthenticated',
)
}
Then: (views.py)
from rest_framework.permissions import AllowAny
class Abc(APIView):
permission_classes = (AllowAny,)
def ...():
You need to be absolutely sure, that you want to switch off CSRF protection.
Create file authentication.py and place it wherever you want in your project. For example, in folder session_utils.
Place this code in the file:
from rest_framework.authentication import SessionAuthentication
class SessionCsrfExemptAuthentication(SessionAuthentication):
def enforce_csrf(self, request):
pass
When you want to make POST, PUT, PATCH or DELETE requests to your view be sure that you've changed SessionAuthentication to SessionCsrfExemptAuthentication from the new file. View example:
#api_view(["POST"])
#authentication_classes([SessionCsrfExemptAuthentication])
#permission_classes([IsAuthenticated])
def some_view(request) -> "Response":
# some logic here
return Response({})
This trick allow you to override method (pass) enforce_csrf and the new session authentication class will skip CSRF check.
✌️
I am struck with the same problem. I followed this reference and it worked.
Solution is to create a middleware
Add disable.py file in one of your apps (in my case it is 'myapp')
class DisableCSRF(object):
def process_request(self, request):
setattr(request, '_dont_enforce_csrf_checks', True)
And add the middileware to the MIDDLEWARE_CLASSES
MIDDLEWARE_CLASSES = (
myapp.disable.DisableCSRF,
)
My Solution is shown blow. Just decorate my class.
from django.views.decorators.csrf import csrf_exempt
#method_decorator(csrf_exempt, name='dispatch')
#method_decorator(basic_auth_required(
target_test=lambda request: not request.user.is_authenticated
), name='dispatch')
class GenPedigreeView(View):
pass
When using REST API POSTs, absence of X-CSRFToken request header may cause that error.
Django docs provide a sample code on getting and setting the CSRF token value from JS.
As pointed in answers above, CSRF check happens when the SessionAuthentication is used. Another approach is to use TokenAuthentication, but keep in mind that it should be placed first in the list of DEFAULT_AUTHENTICATION_CLASSES of REST_FRAMEWORK setting.
If you are using an exclusive virtual environment for your application, you can use the following approach without effective any other applications.
What you observed happens because rest_framework/authentication.py has this code in the authenticate method of SessionAuthentication class:
self.enforce_csrf(request)
You can modify the Request class to have a property called csrf_exempt and initialize it inside your respective View class to True if you do not want CSRF checks. For example:
Next, modify the above code as follows:
if not request.csrf_exempt:
self.enforce_csrf(request)
There are some related changes you'd have to do it in the Request class
This could also be a problem during a DNS Rebinding attack.
In between DNS changes, this can also be a factor. Waiting till DNS is fully flushed will resolve this if it was working before DNS problems/changes.
For me, using django 3.1.5 and django rest framework 3.12 the solution was way easier.
It happened to me that on a views.py file I had defined this two methods:
#api_view(['POST'])
#permission_classes((IsAuthenticated, ))
def create_transaction(request):
return Response(status=status.HTTP_200_OK)
def create_transaction(initial_data):
pass
On my urls.py:
urlpatterns = [
path('transaction', views.create_transaction, name='transaction'),
]
Django was picking the latest and throwing the error. Renaming one of the two solved the issue.
Code bellow would remove demand for CSRF. Even anon user would be able to send request.
from typing import List, Any
class Object(APIView):
authentication_classes: List = []
permission_classes: List[Any] = [AllowAny]
...
...
Removing CSRF check is not always the only (or best) solution. Actually, it's an important security mechanism for SessionAuthentication.
I was having the same issue when trying to authenticate with JWT and doing a POST request.
My initial setup looked like this:
REST_FRAMEWORK = {
"DEFAULT_AUTHENTICATION_CLASSES": (
"rest_framework.authentication.SessionAuthentication",
"django_cognito_jwt.JSONWebTokenAuthentication",
),
...
}
As SessionAuthentication was checked first in the list, the CSRF error was raised. My solution was as simple as changing the order to always check JWT auth first. Like this:
"DEFAULT_AUTHENTICATION_CLASSES": (
"django_cognito_jwt.JSONWebTokenAuthentication",
"rest_framework.authentication.SessionAuthentication",
),
At the end, SessionAuthentication for me is only used in the django admin panel and 99% of the requests goes to the API that uses JWT auth.
How to redirect url from middleware?
Infinite loop problem.
I intend to redirect the user to a client registration url if the registration has not yet been completed.
def check_user_active(get_response):
def middleware(request):
response = get_response(request)
try:
print(Cliente.objects.get(usuario_id=request.user.id))
except Cliente.DoesNotExist:
return redirect('confirm')
return response
return middleware
Every request to server goes through Middleware. Hence, when you are going to confirm page, the request goes through middleware again. So its better put some condition here so that it ignores confirm url. You can try like this:
def check_user_active(get_response):
def middleware(request):
response = get_response(request)
if not request.path == "confirm":
try:
print(Cliente.objects.get(usuario_id=request.user.id))
except Cliente.DoesNotExist:
return redirect('confirm')
return response
return middleware
You should be using a login_required like decorator see Django authentication system for more detail.
Example:
from django.contrib.auth.decorators import login_required
#login_required(login_url="/your/login/view/url/")
def my_view(request):
...
Avoid using middlewares for any kind of redirection always you can, according to the docs
Middleware is a framework of hooks into Django’s request/response processing. It’s a light, low-level “plugin” system for globally altering Django’s input or output.
In other words, middlewares are there for processing request and responses, if you redirect to any view, you will (potentially) recursively trigger your middleware.
And, on the other hand ...
In the future, you might want to add a view that can be visited by anonymous users, this middleware will be a problem ...
I got some REST API endpoints in Django and I'd like to use the same authentication for Graphene. The documentation does not provide any guidance.
For example, if you are using authentication_classes = (TokenAuthentication,) in your API views, you could add an endpoint to a GraphQLView decorated in this way:
urls.py:
# ...
from rest_framework.authentication import TokenAuthentication
from rest_framework.permissions import IsAuthenticated
from rest_framework.decorators import authentication_classes, permission_classes, api_view
def graphql_token_view():
view = GraphQLView.as_view(schema=schema)
view = permission_classes((IsAuthenticated,))(view)
view = authentication_classes((TokenAuthentication,))(view)
view = api_view(['GET', 'POST'])(view)
return view
urlpatterns = [
# ...
url(r'^graphql_token', graphql_token_view()),
url(r'^graphql', csrf_exempt(GraphQLView.as_view(schema=schema))),
url(r'^graphiql', include('django_graphiql.urls')),
# ...
Note that we added a new ^graphql_token endpoint and kept the original ^graphql which is used by the GraphiQL tool.
Then, you should set the Authorization header in your GraphQL client and point to the graphql_token endpoint.
UPDATE: See this GitHub issue where people have suggested alternative solutions and full working examples.
Adding some additional steps that I had to take when following this integration:
class RTGraphQLView(GraphQLView):
def parse_body(self, request):
if type(request) is rest_framework.request.Request:
return request.data
return super().parse_body(request)
Graphene was expecting the .body attr but DRF reads it and attaches it to .data before being passed to GraphQLView.
I'm a newcomer to the python/Django universe and just started a huge project I'm pretty excited about. I need to have my users login through Facebook and my app has a really specific user flow. I've set up django-allauth and everything works as I needed. I've overriden LOGIN_REDIRECT_URL so that my users land on the page I want when they log in.
BUT. When the user opens Facebook login dialog box and then closes it without logging in, the authentication_error.html template gets rendered by allauth.socialaccount.helpers.render_authentication_error, and this is not the behaviour I want. I want the user to simply be redirected to the login page.
Yes, I know I could simply override the template by putting it in my TEMPLATE_DIRS, but then the url wouldn't be the same.
I've come to the conclusion I needed a middleware to intercept the response to the http request.
from django.shortcuts import redirect
class Middleware():
"""
A middleware to override allauth user flow
"""
def __init__(self):
self.url_to_check = "/accounts/facebook/login/token/"
def process_response(self, request, response):
"""
In case of failed faceboook login
"""
if request.path == self.url_to_check and\
not request.user.is_authenticated():
return redirect('/')
return response
But I'm not sure about the efficiency of my solution nor the pythonesquitude (I juste came up with that word) of it. Is there anything else I could do to change that default django-allauth behavior without using a middleware or a signal?
Thanks!
Yes, I know I could simply override the template by putting it in my TEMPLATE_DIRS, but then the url wouldn't be the same.
Overriding a template won't change the URL. In your overridden template, you could do a client-side redirect to whatever URL you prefer.
I decided to use a middleware and redirect to home url in case a GET request is made on a URL of the form ^/accounts/.*$
from django.shortcuts import redirect
import re
class AllauthOverrideMiddleware():
"""
A middleware to implement a custom user flow
"""
def __init__(self):
# allauth urls
self.url_social = re.compile("^/accounts/.*$")
def process_request(self, request):
# WE CAN ONLY POST TO ALLAUTH URLS
if request.method == "GET" and\
self.url_social.match(request.path):
return redirect("/")
I have a single page angularjs application utilizing JWT authentication. Because JWTs are sent with every single request, it seems redundant to use CSRF tokens in my forms. In order to disable CSRF checking, I commented out 'django.middleware.csrf.CsrfViewMiddleware' in my settings.py middleware classes. This all works fine.
However, when I use the Django Admin panel, CSRF is used. This seems reasonable since JWTs don't protect the Admin pages.
When I log into Admin, a cookie is set containing the CSRF token. When I try to POST to REST endpoints from my angularjs app while logged into an Admin session, the requests contain the CSRF cookie, and the Django REST backend rejects the POST with a 403 status. If I delete the cookie from my browser settings and re-POST, it goes through as expected.
I can configure my app not to set CSRF cookies, but how do I configure my app to ignore the CSRF cookie if it was set by another app on the same domain? I can't guarantee that a token won't be set by something else as I don't control all of the apps that will be running on the domain.
I am using class-based views that extend viewsets in the Django REST Framework. I attempted to address this by decorating my classes with csrf_exempt, but this did not seem to work (still get 403 response). Could I be doing it wrong, or is there some other solution that I am missing?
Here is my attempt at csrf_exempt:
class AccountList(generics.ListCreateAPIView):
serializer_class = serializers.AccountSerializer
def get_queryset(self):
return models.Account.objects.all()
#method_decorator(csrf_exempt)
def dispatch(self, *args, **kwargs):
return super(AccountList, self).dispatch(*args, **kwargs)
It sounds like you have SessionAuthentication enabled, which is the part of Django REST Framework that enforces CSRF for cookie-based authentication. Since you are using JWT, and you mentioned that all pages use JWT for authentication, you should be able to just remove SessionAuthentication from your list of default authentication classes.
If you actually need it, you can just move it to the bottom of the default classes. Because it is detecting the authentication cookies, and authentication was successful, SessionAuthentication will fail before JWT is checked.