How to authenticate against Django’s user database from Apache¶
Since keeping multiple authentication databases in sync is a common problem when dealing with Apache, you can configure Apache to authenticate against Django’s authentication system directly. This requires Apache version >= 2.2 and mod_wsgi >= 2.0. For example, you could:
- Serve static/media files directly from Apache only to authenticated users.
- Authenticate access to a Subversion repository against Django users with a certain permission.
- Allow certain users to connect to a WebDAV share created with mod_dav.
Note
If you have installed a custom user model and
want to use this default auth handler, it must support an is_active
attribute. If you want to use group based authorization, your custom user
must have a relation named ‘groups’, referring to a related object that has
a ‘name’ field. You can also specify your own custom mod_wsgi
auth handler if your custom cannot conform to these requirements.
Authentication with mod_wsgi
¶
Note
The use of WSGIApplicationGroup %{GLOBAL}
in the configurations below
presumes that your Apache instance is running only one Django application.
If you are running more than one Django application, please refer to the
Defining Application Groups section of the mod_wsgi docs for more
information about this setting.
Make sure that mod_wsgi is installed and activated and that you have followed the steps to set up Apache with mod_wsgi.
Next, edit your Apache configuration to add a location that you want only authenticated users to be able to view:
WSGIScriptAlias / /path/to/mysite.com/mysite/wsgi.py
WSGIPythonPath /path/to/mysite.com
WSGIProcessGroup %{GLOBAL}
WSGIApplicationGroup %{GLOBAL}
<Location "/secret">
AuthType Basic
AuthName "Top Secret"
Require valid-user
AuthBasicProvider wsgi
WSGIAuthUserScript /path/to/mysite.com/mysite/wsgi.py
</Location>
The WSGIAuthUserScript
directive tells mod_wsgi to execute the
check_password
function in specified wsgi script, passing the user name and
password that it receives from the prompt. In this example, the
WSGIAuthUserScript
is the same as the WSGIScriptAlias
that defines your
application that is created by django-admin startproject.
Using Apache 2.2 with authentication
Make sure that mod_auth_basic
and mod_authz_user
are loaded.
These might be compiled statically into Apache, or you might need to use
LoadModule to load them dynamically in your httpd.conf
:
LoadModule auth_basic_module modules/mod_auth_basic.so
LoadModule authz_user_module modules/mod_authz_user.so
Finally, edit your WSGI script mysite.wsgi
to tie Apache’s authentication
to your site’s authentication mechanisms by importing the check_password
function:
import os
os.environ["DJANGO_SETTINGS_MODULE"] = "mysite.settings"
from django.contrib.auth.handlers.modwsgi import check_password
from django.core.handlers.wsgi import WSGIHandler
application = WSGIHandler()
Requests beginning with /secret/
will now require a user to authenticate.
The mod_wsgi access control mechanisms documentation provides additional details and information about alternative methods of authentication.
Authorization with mod_wsgi
and Django groups¶
mod_wsgi also provides functionality to restrict a particular location to members of a group.
In this case, the Apache configuration should look like this:
WSGIScriptAlias / /path/to/mysite.com/mysite/wsgi.py
WSGIProcessGroup %{GLOBAL}
WSGIApplicationGroup %{GLOBAL}
<Location "/secret">
AuthType Basic
AuthName "Top Secret"
AuthBasicProvider wsgi
WSGIAuthUserScript /path/to/mysite.com/mysite/wsgi.py
WSGIAuthGroupScript /path/to/mysite.com/mysite/wsgi.py
Require group secret-agents
Require valid-user
</Location>
To support the WSGIAuthGroupScript
directive, the same WSGI script
mysite.wsgi
must also import the groups_for_user
function which
returns a list groups the given user belongs to.
from django.contrib.auth.handlers.modwsgi import check_password, groups_for_user
Requests for /secret/
will now also require user to be a member of the
“secret-agents” group.