Source code for flask_dance.contrib.facebook
from flask import g
from werkzeug.local import LocalProxy
from flask_dance.consumer import OAuth2ConsumerBlueprint
__maintainer__ = "Matt Bachmann <bachmann.matt@gmail.com>"
[docs]
def make_facebook_blueprint(
client_id=None,
client_secret=None,
*,
scope=None,
redirect_url=None,
redirect_to=None,
login_url=None,
authorized_url=None,
rerequest_declined_permissions=False,
session_class=None,
storage=None,
rule_kwargs=None,
):
"""
Make a blueprint for authenticating with Facebook using OAuth 2. This requires
a client ID and client secret from Facebook. You should either pass them to
this constructor, or make sure that your Flask application config defines
them, using the variables :envvar:`FACEBOOK_OAUTH_CLIENT_ID` and
:envvar:`FACEBOOK_OAUTH_CLIENT_SECRET`.
Args:
client_id (str): The client ID for your application on Facebook.
client_secret (str): The client secret for your application on Facebook
scope (str, optional): comma-separated list of scopes for the OAuth token
redirect_url (str): the URL to redirect to after the authentication
dance is complete
redirect_to (str): if ``redirect_url`` is not defined, the name of the
view to redirect to after the authentication dance is complete.
The actual URL will be determined by :func:`flask.url_for`
login_url (str, optional): the URL path for the ``login`` view.
Defaults to ``/facebook``
authorized_url (str, optional): the URL path for the ``authorized`` view.
Defaults to ``/facebook/authorized``.
rerequest_declined_permissions (bool, optional): should the blueprint ask again for declined permissions.
Defaults to ``False``
session_class (class, optional): The class to use for creating a
Requests session. Defaults to
:class:`~flask_dance.consumer.requests.OAuth2Session`.
storage: A token storage class, or an instance of a token storage
class, to use for this blueprint. Defaults to
:class:`~flask_dance.consumer.storage.session.SessionStorage`.
rule_kwargs (dict, optional): Additional arguments that should be passed when adding
the login and authorized routes. Defaults to ``None``.
:rtype: :class:`~flask_dance.consumer.OAuth2ConsumerBlueprint`
:returns: A :doc:`blueprint <flask:blueprints>` to attach to your Flask app.
"""
authorization_url_params = {}
if rerequest_declined_permissions:
authorization_url_params["auth_type"] = "rerequest"
facebook_bp = OAuth2ConsumerBlueprint(
"facebook",
__name__,
client_id=client_id,
client_secret=client_secret,
scope=scope,
base_url="https://graph.facebook.com/",
authorization_url="https://www.facebook.com/dialog/oauth",
authorization_url_params=authorization_url_params,
token_url="https://graph.facebook.com/oauth/access_token",
redirect_url=redirect_url,
redirect_to=redirect_to,
login_url=login_url,
authorized_url=authorized_url,
session_class=session_class,
storage=storage,
rule_kwargs=rule_kwargs,
)
facebook_bp.from_config["client_id"] = "FACEBOOK_OAUTH_CLIENT_ID"
facebook_bp.from_config["client_secret"] = "FACEBOOK_OAUTH_CLIENT_SECRET"
@facebook_bp.before_app_request
def set_applocal_session():
g.flask_dance_facebook = facebook_bp.session
return facebook_bp
facebook = LocalProxy(lambda: g.flask_dance_facebook)