django-cookies-samesite

Django 3.1.x introduces full support of SameSite flag for session and csrf cookie.

Unfortunately, this functionality will not be ported to older versions of Django e.g. 1.11.x or 2.2.x

This repository contains a middleware which automatically sets SameSite attribute for session and csrf cookies in legacy versions of Django.

Quickstart

Install django-cookies-samesite:

pip install django-cookies-samesite

Add the middleware to the top of MIDDLEWARE_CLASSES:

MIDDLEWARE_CLASSES = (
    'django_cookies_samesite.middleware.CookiesSameSite',
    ...
)

Important

If you're planning to use this middleware together with the newer version of Django (>2.2.x), and you want to e.g. set the SameSite attribute to none, then you have to add DCS_ prefix to all django-cookies-samesite settings (see examples below).

It will help you to avoid bugs caused by the conflicting settings names.

Related bug: jotes#19

Set your preferred SameSite policy in settings.py: .. code-block:: python

SESSION_COOKIE_SAMESITE = 'lax' # or DCS_SESSION_COOKIE_SAMESITE = 'Lax'

This can be 'Lax', 'None', 'Strict', or None to disable the flag. Also, you can set this flag in your custom cookies:

SESSION_COOKIE_SAMESITE_KEYS = {'my-custom-cookies'}
# or
DCS_SESSION_COOKIE_SAMESITE_KEYS = {'my-custom-cookies'}

After that you should be able to see the SameSite flag set for session and csrf cookies.

You can set the SameSite flag on all cookies (even on those coming from third-party Django apps):

SESSION_COOKIE_SAMESITE_FORCE_ALL = True
# or
DCS_SESSION_COOKIE_SAMESITE_FORCE_ALL = True

Running Tests

Does the code actually work?

source <YOURVIRTUALENV>/bin/activate
(myenv) $ pip install tox
(myenv) $ tox

Credits

Tools used in rendering this package:

• Cookiecutter
• cookiecutter-djangopackage

Contributors

• Jørn Lomax <[email protected]>
• Antoine Lefebvre-Brossard <[email protected]>
• Code Hugger (Matthew Jones) <[email protected]>
• Mykolas Kvieska <[email protected]>
• Liuyang Wan <[email protected]>