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