Django Social Auth

Django Social Auth is an easy to setup social authentication/authorization mechanism for Django projects.

Crafted using base code from django-twitter-oauth and django-openid-auth, implements a common interface to define new authentication providers from third parties.

Demo

There's a demo at http://social.matiasaguirre.net/. Note: It lacks Orkut support at the moment.

Features

This application provides user registration and login using social sites credentials, some features are:

Registration and Login using social sites using the following providers at the moment:
- Google OpenID
- Google OAuth
- Google OAuth2
- Yahoo OpenID
- OpenId like myOpenID
- Twitter OAuth
- Facebook OAuth
Some contributions added support for:
Basic user data population and signaling, to allows custom fields values from providers response
Multiple social accounts association to single users
Custom User model override if needed (auth.User by default)

Dependencies

Dependencies that must be meet to use the application:

OpenId support depends on python-openid
OAuth support depends on python-oauth2
Twitter and Facebook support demands an application registration on their corresponding sites.

Installation

From pypi:

$ pip install django-social-auth

or:

$ easy_install django-social-auth

or clone from github:

$ git clone git://github.com/omab/django-social-auth.git

and add social_auth to PYTHONPATH:

$ export PYTHONPATH=$PYTHONPATH:$(pwd)/django-social-auth/

or:

$ cd django-social-auth
$ sudo python setup.py install

Configuration

Add social_auth to PYTHONPATH and installed applications:
```
INSTALLED_APPS = (
    ...
    'social_auth'
)
```

Add desired authentication backends to AUTHENTICATION_BACKENDS setting:

AUTHENTICATION_BACKENDS = (
    'social_auth.backends.twitter.TwitterBackend',
    'social_auth.backends.facebook.FacebookBackend',
    'social_auth.backends.google.GoogleOAuthBackend',
    'social_auth.backends.google.GoogleOAuth2Backend',
    'social_auth.backends.google.GoogleBackend',
    'social_auth.backends.yahoo.YahooBackend',
    'social_auth.backends.contrib.linkedin.LinkedinBackend',
    'social_auth.backends.contrib.LiveJournalBackend',
    'social_auth.backends.contrib.orkut.OrkutBackend',
    'social_auth.backends.contrib.orkut.FoursquareBackend',
    'social_auth.backends.OpenIDBackend',
    'django.contrib.auth.backends.ModelBackend',
)

Note: this was introduced in a recent change and it's not backward compatible, take into account that saved sessions won't be able to login because the backend string stored in session (like backends.TwitterBackend) won't match the new paths.

The application will try to import custom backends from the sources defined in:
```
SOCIAL_AUTH_IMPORT_BACKENDS = (
    'myproy.social_auth_extra_services',
)
```
This way it's easier to add new providers, check the already defined ones in social_auth.backends for examples.

Take into account that backends must be defined in AUTHENTICATION_BACKENDS or Django won't pick them when trying to authenticate the user.

Setup needed OAuth keys (see OAuth section for details):

TWITTER_CONSUMER_KEY         = ''
TWITTER_CONSUMER_SECRET      = ''
FACEBOOK_APP_ID              = ''
FACEBOOK_API_SECRET          = ''
LINKEDIN_CONSUMER_KEY        = ''
LINKEDIN_CONSUMER_SECRET     = ''
ORKUT_CONSUMER_KEY           = ''
ORKUT_CONSUMER_SECRET        = ''
GOOGLE_CONSUMER_KEY          = ''
GOOGLE_CONSUMER_SECRET       = ''
GOOGLE_OAUTH2_CLIENT_KEY     = ''
GOOGLE_OAUTH2_CLIENT_SECRET  = ''
FOURSQUARE_CONSUMER_KEY      = ''
FOURSQUARE_CONSUMER_SECRET   = ''

Setup login URLs:
```
LOGIN_URL          = '/login-form/'
LOGIN_REDIRECT_URL = '/logged-in/'
LOGIN_ERROR_URL    = '/login-error/'
```
Check Django documentation at Login URL and Login redirect URL

If a custom redirect URL is needed that must be different to LOGIN_URL, define the setting:
```
SOCIAL_AUTH_LOGIN_REDIRECT_URL = '/another-login-url/'
```
In case of authentication error, the message can be stored in session if the following setting is defined:
```
SOCIAL_AUTH_ERROR_KEY = 'social_errors'
```
This defines the desired session key where last error message should be stored. It's disabled by default.

Configure authentication and association complete URL names to avoid possible clashes:

SOCIAL_AUTH_COMPLETE_URL_NAME  = 'complete'
SOCIAL_AUTH_ASSOCIATE_URL_NAME = 'associate_complete'

Add URLs entries:

urlpatterns = patterns('',
    ...
    url(r'', include('social_auth.urls')),
    ...
)

Sync database to create needed models:
```
./manage.py syncdb
```

Not mandatory, but recommended:

SOCIAL_AUTH_DEFAULT_USERNAME = 'new_social_auth_user'

or:

import random
SOCIAL_AUTH_DEFAULT_USERNAME = lambda: random.choice(['Darth Vader', 'Obi-Wan Kenobi', 'R2-D2', 'C-3PO', 'Yoda'])

or:

from django.template.defaultfilters import slugify
SOCIAL_AUTH_USERNAME_FIXER = lambda u: slugify(u)

in case your user layout needs to purify username on some weird way.

Final user name will have a random UUID-generated suffix in case it's already taken. The UUID token max length can be changed with the setting:

SOCIAL_AUTH_UUID_LENGTH = 16

Backends will store extra values from response by default, set this to False to avoid such behavior:
```
SOCIAL_AUTH_EXTRA_DATA = False
```
Also more extra values will be stored if defined, details about this setting are listed below on OpenId and OAuth sections.

Session expiration time is an special value, it's recommended to define:
```
SOCIAL_AUTH_EXPIRATION = 'expires'
```
to and use such setting name where expiration times are returned. View that completes login process will set session expiration time using this name if it's present or 'expires' by default. Expiration time saving can be disabled setting:
```
SOCIAL_AUTH_SESSION_EXPIRATION = False
```
It's possible to override the used User model if needed:
```
SOCIAL_AUTH_USER_MODEL = 'myapp.CustomUser'
```
This class must have a custom Model Manager with a create_user method that resembles the one on auth.UserManager.

Also, it's highly recommended that this class define the following fields:
```
username   = CharField(...)
last_login = DateTimeField(blank=True)
is_active  = BooleanField(...)
```
and the method:
```
is_authenticated():
    ...
```
These are needed to ensure a better django-auth integration, in other case login_required won't be usable. A warning is displayed if any of these are missing. By default auth.User is used.

Check example application for implementation details, but first, please take a look to User Profiles, it might be what you were looking for.

It's possible to disable user creations by django-social-auth with:
```
SOCIAL_AUTH_CREATE_USERS = False
```
It is also possible to associate multiple user accounts with a single email address as long as the rest of the user data is unique. Set value as True to enable, otherwise set as False to disable. This behavior is disabled by default (false) unless specifically set:
```
SOCIAL_AUTH_ASSOCIATE_BY_MAIL = True
```

Signals

A pre_update signal is sent when user data is about to be updated with new values from authorization service provider, this apply to new users and already existent ones. This is useful to update custom user fields or User Profiles, for example, to store user gender, location, etc. Example:

from social_auth.signals import pre_update
from social_auth.backends.facebook import FacebookBackend

def facebook_extra_values(sender, user, response, details, **kwargs):
    user.gender = response.get('gender')
    return True

pre_update.connect(facebook_extra_values, sender=FacebookBackend)

New data updating is made automatically but could be disabled and left only to signal handler if this setting value is set to True:

SOCIAL_AUTH_CHANGE_SIGNAL_ONLY = False

Take into account that when defining a custom User model and declaring signal handler in models.py, the imports and handler definition must be made after the custom User model is defined or circular imports issues will be raised.

Also a new-user signal is sent when new accounts are created:

from social_auth.signals import socialauth_registered

def new_users_handler(sender, user, response, details, **kwargs):
    user.is_new = True
    return False

socialauth_registered.connect(new_users_handler, sender=None)

OpenId

OpenId support is simpler to implement than OAuth. Google and Yahoo providers are supported by default, others are supported by POST method providing endpoint URL.

OpenId backends can store extra data in UserSocialAuth.extra_data field by defining a set of values names to retrieve from any of the used schemas, pettributeExchange and SimpleRegistration. As their keywords differ we need two settings.

Settings is per backend, so we have two possible values for each one. Name is dynamically checked using uppercase backend name as prefix:

<uppercase backend name>_SREG_EXTRA_DATA
<uppercase backend name>_AX_EXTRA_DATA

Example:

GOOGLE_SREG_EXTRA_DATA = [(..., ...)]
GOOGLE_AX_EXTRA_DATA = [(..., ...)]

Settings must be a list of tuples mapping value name in response and value alias used to store.

OAuth

OAuth communication demands a set of keys exchange to validate the client authenticity prior to user approbation. Twitter, Facebook and Orkut facilitates these keys by application registration, Google works the same, but provides the option for unregistered applications.

Check next sections for details.

OAuth backends also can store extra data in UserSocialAuth.extra_data field by defining a set of values names to retrieve from service response.

Settings is per backend and it's name is dynamically checked using uppercase backend name as prefix:

<uppercase backend name>_EXTRA_DATA

Example:

FACEBOOK_EXTRA_DATA = [(..., ...)]

Settings must be a list of tuples mapping value name in response and value alias used to store.

Twitter

Twitter offers per application keys named "Consumer Key" and "Consumer Secret". To enable Twitter these two keys are needed. Further documentation at Twitter development resources:

Register a new application at Twitter App Creation,
mark the "Yes, use Twitter for login" checkbox, and
fill "Consumer Key" and "Consumer Secret" values:
```
TWITTER_CONSUMER_KEY
TWITTER_CONSUMER_SECRET
```
You need to specify an URL callback or the application will be marked as Client type instead of the Browser. Almost any dummy value will work if you plan some test.

Facebook

Facebook works similar to Twitter but it's simpler to setup and redirect URL is passed as a parameter when issuing an authorization. Further documentation at Facebook development resources:

Register a new application at Facebook App Creation, and
fill "App Id" and "App Secret" values in values:
```
FACEBOOK_APP_ID
FACEBOOK_API_SECRET
```
also it's possible to define extra permissions with:
```
FACEBOOK_EXTENDED_PERMISSIONS = [...]
```

If you define a redirect URL in Facebook setup page, be sure to not define http://127.0.0.1:8000 or http://localhost:8000 because it won't work when testing. Instead I define http://myapp.com and setup a mapping on /etc/hosts or use dnsmasq.

Orkut

Orkut offers per application keys named "Consumer Key" and "Consumer Secret". To enable Orkut these two keys are needed.

Check Google support and Orkut API for details on getting your consumer_key and consumer_secret keys.

fill "Consumer Key" and "Consumer Secret" values:
```
ORKUT_CONSUMER_KEY
ORKUT_CONSUMER_SECRET
```
add any needed extra data to:
```
ORKUT_EXTRA_DATA = ''
```
configure extra scopes in:
```
ORKUT_EXTRA_SCOPES = [...]
```

Google OAuth

Google provides "Consumer Key" and "Consumer Secret" keys to registered applications, but also allows unregistered application to use their authorization system with, but beware that this method will display a security banner to the user telling that the application is not trusted.

Check Google OAuth and make your choice.

fill "Consumer Key" and "Consumer Secret" values:
```
GOOGLE_CONSUMER_KEY
GOOGLE_CONSUMER_SECRET
```

anonymous values will be used if not configured as described in their OAuth reference

configure the display name to be used in the "grant permissions" dialog that Google will display to users in:
```
GOOGLE_DISPLAY_NAME = ''
```
shows 'Social Auth' by default, but that might not suite your application.
setup any needed extra scope in:
```
GOOGLE_OAUTH_EXTRA_SCOPE = [...]
```

Check which applications can be included in their Google Data Protocol Directory

Google OAuth2

Recently Google launched OAuth2 support following the definition at OAuth2 draft. It works in a similar way to plain OAuth mechanism, but developers must register an application and apply for a set of keys. Check Google OAuth2 document for details.

Note:: This support is experimental as Google implementation may change and OAuth2 is still a draft.

To enable OAuth2 support:

fill "Client Key" and "Client Secret" settings, these values can be obtained easily as described on OAuth2 Registering doc:
```
GOOGLE_OAUTH2_CLIENT_KEY = ''
GOOGLE_OAUTH2_CLIENT_SECRET = ''
```
scopes are shared between OAuth mechanisms:
```
GOOGLE_OAUTH_EXTRA_SCOPE = [...]
```

Check which applications can be included in their Google Data Protocol Directory

Testing

To test the app just run:

./manage.py test social_auth

This will run a bunch of tests, so far only login process is tested, more will come eventually.

User accounts on the different sites are needed to run tests, configure the credentials in the following way:

# twitter testing
TEST_TWITTER_USER = 'testing_account'
TEST_TWITTER_PASSWORD = 'password_for_testing_account'

# facebook testing
TEST_FACEBOOK_USER = 'testing_account'
TEST_FACEBOOK_PASSWORD = 'password_for_testing_account'

# goole testing
TEST_GOOGLE_USER = 'testing_account@gmail.com'
TEST_GOOGLE_PASSWORD = 'password_for_testing_account'

There's support for Selenium tests too on root contrib directory. To run install selenium:

pip install selenium

and create a test_settings.py copying test_settings.py.template and fill the needed account information. Then run:

cd contrib/tests
./runtests.py

Miscellaneous

Join to django-social-auth community on Convore and bring any questions or suggestions that will improve this app.

South users should add this rule to enable migrations:

try:
    import south
    from south.modelsinspector import add_introspection_rules
    add_introspection_rules([], ["^social_auth\.fields\.JSONField"])
except:
    pass

Bugs

Maybe several, please create issues in github

Contributors

Attributions to whom deserves:

caioariede (Caio Ariede):
- Improvements and Orkut support
krvss (Stas Kravets):
- Initial setup.py configuration
jezdez (Jannis Leidel):
- Improvements and documentation update
alfredo (Alfredo Ramirez)
- Facebook and Doc improvements
mattucf (Matt Brown)
- Twitter and OAuth improvements
Quard (Vadym Zakovinko)
- LinkedIn support
micrypt (Seyi Ogunyemi)
- OAuth2 migration
bedspax
- Foursquare support

Copyrights

Base work is copyrighted by:

django-twitter-oauth:

Original Copyright goes to Henrik Lied (henriklied)
Code borrowed from https://github.com/henriklied/django-twitter-oauth

django-openid-auth:

django-openid-auth -  OpenID integration for django.contrib.auth
Copyright (C) 2007 Simon Willison
Copyright (C) 2008-2010 Canonical Ltd.

lvanderree/django-social-auth