def wrapper(request, *args, **kwargs):
# The user has already authorized the application, but the given view requires
# permissions besides the defaults listed in ``FACEBOOK_APPLICATION_DEFAULT_PERMISSIONS``.
#
# Derive a list of outstanding permissions and prompt the user to grant them.
if request.facebook and request.facebook.user and permissions:
outstanding_permissions = [p for p in permissions if p not in request.facebook.user.permissions]
if outstanding_permissions:
return authorize_application(
request=request,
redirect_uri=redirect_uri or get_post_authorization_redirect_url(request),
permissions=outstanding_permissions
)
# The user has not authorized the application yet.
#
# Concatenate the default permissions with permissions required for this particular view.
if not request.facebook or not request.facebook.user:
return authorize_application(
request=request,
redirect_uri=redirect_uri or get_post_authorization_redirect_url(request),
permissions=(FACEBOOK_APPLICATION_INITIAL_PERMISSIONS or []) + (permissions or [])
)
return function(request, *args, **kwargs)
def process_request(self, request):
"""Process the signed request."""
if djangocanvas.settings.ENABLED_PATHS and djangocanvas.settings.DISABLED_PATHS:
raise ImproperlyConfigured(
'You may configure either FANDJANGO_ENABLED_PATHS '
'or FANDJANGO_DISABLED_PATHS, but not both.'
)
if djangocanvas.settings.DISABLED_PATHS and is_disabled_path(request.path):
return
if djangocanvas.settings.ENABLED_PATHS and not is_enabled_path(request.path):
return
# An error occured during authorization...
if 'error' in request.GET:
logger.warning(u'Facebook authorization error')
error = request.GET['error']
# The user refused to authorize the application...
if error == 'access_denied':
logger.warning(u'Facebook user access denied')
return authorization_denied_view(request)
# Signed request found in either GET, POST or COOKIES...
if 'signed_request' in request.REQUEST or 'signed_request' in request.COOKIES:
request.facebook = Facebook()
# If the request method is POST and its body only contains the signed request,
# chances are it's a request from the Facebook platform and we'll override
# the request method to HTTP GET to rectify their misinterpretation
# of the HTTP standard.
#
# References:
# "POST for Canvas" migration at http://developers.facebook.com/docs/canvas/post/
# "Incorrect use of the HTTP protocol" discussion at http://forum.developers.facebook.net/viewtopic.php?id=93554
if request.method == 'POST' and 'signed_request' in request.POST:
request.POST = QueryDict('')
request.method = 'GET'
try:
request.facebook.signed_request = SignedRequest(
signed_request=request.REQUEST.get('signed_request') or request.COOKIES.get('signed_request'),
application_secret_key=djangocanvas.settings.FACEBOOK_APPLICATION_SECRET_KEY)
except SignedRequest.Error as ex:
logger.warning(u'Facebook signed request error: {0}'.format(str(ex)))
request.facebook = False
# Valid signed request and user has authorized the application
if request.facebook and request.facebook.signed_request.user.has_authorized_application:
# Redirect to Facebook Authorization if the OAuth token has expired
if request.facebook.signed_request.user.oauth_token.has_expired:
return authorize_application(
request=request,
redirect_uri=get_post_authorization_redirect_url(request))
# Initialize a User object and its corresponding OAuth token
social_id = request.facebook.signed_request.user.id
try:
social_user = SocialUser.objects.get(social_id=social_id)
except SocialUser.DoesNotExist:
logger.info(u'Creating a new user (facebook id = {0})'.format(social_id))
oauth_token = OAuthToken.objects.create(
token=request.facebook.signed_request.user.oauth_token.token,
issued_at=request.facebook.signed_request.user.oauth_token.issued_at,
expires_at=request.facebook.signed_request.user.oauth_token.expires_at)
social_user = SocialUser.objects.create(
social_id=request.facebook.signed_request.user.id,
provider='facebook',
oauth_token=oauth_token)
graph = GraphAPI(social_user.oauth_token.token)
profile = graph.get('me')
social_user.first_name = profile.get('first_name')
social_user.last_name = profile.get('last_name')
social_user.save()
request.social_data = graph
self._set_user_is_new(request)
# Update the user's details and OAuth token
else:
if 'signed_request' in request.REQUEST:
social_user.authorized = True
if request.facebook.signed_request.user.oauth_token:
social_user.oauth_token.token = request.facebook.signed_request.user.oauth_token.token
social_user.oauth_token.issued_at = request.facebook.signed_request.user.oauth_token.issued_at
social_user.oauth_token.expires_at = request.facebook.signed_request.user.oauth_token.expires_at
social_user.oauth_token.save()
social_user.save()
if not social_user.oauth_token.extended:
# Attempt to extend the OAuth token, but ignore exceptions raised by
# bug #102727766518358 in the Facebook Platform.
#
# http://developers.facebook.com/bugs/102727766518358/
try:
social_user.oauth_token.extend()
except:
pass
social_login(request, social_user)
else:
return authorize_application(
request=request,
redirect_uri=get_post_authorization_redirect_url(request))
# ... no signed request found.
else:
request.facebook = False
