def wrapper(request, *args, **kwargs):
# We know the user has been authenticated via a canvas page if a signed request is set.
canvas = request.facebook is not False and hasattr(request.facebook, "signed_request")
# 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, canvas=canvas),
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, canvas=canvas),
permissions = (FACEBOOK_APPLICATION_INITIAL_PERMISSIONS or []) + (permissions or [])
)
return function(request, *args, **kwargs)
def wrapper(request, *args, **kwargs):
# Let Facebook's scraper pass
# Using HTTP_USER_AGENT string which is kind of weak
# Only allowing GET to pass through
if request.method == 'GET' and request.META.get('HTTP_USER_AGENT', '').startswith('facebookexternalhit'):
return function(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 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 wrapper(request, *args, **kwargs):
if not request.facebook or not request.facebook.user:
return authorize_application(
request = request,
redirect_uri = get_post_authorization_redirect_url(request)
)
return function(request, *args, **kwargs)
def test_authorization_redirect_only_triggers_on_fandjango_authorization_redirect(self):
response = authorize_application(None, redirect_uri="http://apps.facebook.com/django-facetools/canvas/test_url/")
before_content = response.content
response = FandjangoIntegrationMiddleware().process_response(None, response)
after_content = response.content
self.assertNotEquals(before_content, after_content)
response = test_url(None)
before_content = response.content
response = FandjangoIntegrationMiddleware().process_response(None, response)
after_content = response.content
self.assertEquals(before_content, after_content)
def test_authorization_redirect_only_triggers_on_fandjango_authorization_redirect(self):
response = authorize_application(None, redirect_uri="http://apps.facebook.com/django-facetools/canvas/test_url/")
before_content = response.content
response = FandjangoIntegrationMiddleware().process_response(None, response)
after_content = response.content
self.assertNotEquals(before_content, after_content)
response = test_url(None)
before_content = response.content
response = FandjangoIntegrationMiddleware().process_response(None, response)
after_content = response.content
self.assertEquals(before_content, after_content)
def test_authorization_redirect_fix(self):
unaltered_redirect_uri = 'http://apps.facebook.com/django-facetools/canvas/test_url/'
altered_redirect_uri = 'https://apps.facebook.com/django-facetools/test_url/'
# Make sure our assumptions about the URL's location are correct
response = authorize_application(None, redirect_uri=unaltered_redirect_uri)
unaltered_js_url = self.get_redirect_uri(response, "window.parent.location =", ';')
unaltered_href_url = self.get_redirect_uri(response, 'You must <a href="', '"')
self.assertEquals(unaltered_redirect_uri, unaltered_js_url)
self.assertEquals(unaltered_redirect_uri, unaltered_href_url)
# Make sure the URL gets changed to the proper URL
middleware = FandjangoIntegrationMiddleware()
response = middleware.process_response(None, response)
altered_js_url = self.get_redirect_uri(response, "window.parent.location =", ';')
altered_href_url = self.get_redirect_uri(response, 'You must <a href="', '"')
self.assertEquals(altered_redirect_uri, altered_js_url)
self.assertEquals(altered_redirect_uri, altered_href_url)
self.assertEquals(200, response.status_code)
def test_authorization_redirect_fix(self):
unaltered_redirect_uri = 'http://apps.facebook.com/django-facetools/canvas/test_url/'
altered_redirect_uri = 'https://apps.facebook.com/django-facetools/test_url/'
# Make sure our assumptions about the URL's location are correct
response = authorize_application(None, redirect_uri=unaltered_redirect_uri)
unaltered_js_url = self.get_redirect_uri(response, "window.parent.location =", ';')
unaltered_href_url = self.get_redirect_uri(response, 'You must <a href="', '"')
self.assertEquals(unaltered_redirect_uri, unaltered_js_url)
self.assertEquals(unaltered_redirect_uri, unaltered_href_url)
# Make sure the URL gets changed to the proper URL
middleware = FandjangoIntegrationMiddleware()
response = middleware.process_response(None, response)
altered_js_url = self.get_redirect_uri(response, "window.parent.location =", ';')
altered_href_url = self.get_redirect_uri(response, 'You must <a href="', '"')
self.assertEquals(altered_redirect_uri, altered_js_url)
self.assertEquals(altered_redirect_uri, altered_href_url)
self.assertEquals(200, response.status_code)
def process_request(self, request):
"""Process the signed request."""
if ENABLED_PATHS and DISABLED_PATHS:
raise ImproperlyConfigured('You may configure either FANDJANGO_ENABLED_PATHS or FANDJANGO_DISABLED_PATHS, but not both.')
if DISABLED_PATHS and is_disabled_path(request.path):
return
if ENABLED_PATHS and not is_enabled_path(request.path):
return
# An error occured during authorization...
if 'error' in request.GET:
error = request.GET['error']
# The user refused to authorize the application...
if error == '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'
request.facebook.signed_request = SignedRequest.parse(
signed_request = request.REQUEST.get('signed_request') or request.COOKIES.get('signed_request'),
application_secret_key = FACEBOOK_APPLICATION_SECRET_KEY
)
# User has authorized the application...
if request.facebook.signed_request.user.has_authorized_application:
# Redirect to Facebook Authorization if the OAuth token has expired
if request.facebook.signed_request.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
try:
user = User.objects.get(facebook_id=request.facebook.signed_request.user.id)
except User.DoesNotExist:
oauth_token = OAuthToken.objects.create(
token = request.facebook.signed_request.oauth_token.token,
issued_at = request.facebook.signed_request.oauth_token.issued_at,
expires_at = request.facebook.signed_request.oauth_token.expires_at
)
user = User.objects.create(
facebook_id = request.facebook.signed_request.user.id,
oauth_token = oauth_token
)
user.synchronize()
# Update the user's details and OAuth token
else:
user.last_seen_at = datetime.now()
user.authorized = True
if request.facebook.signed_request.oauth_token:
user.oauth_token.token = request.facebook.signed_request.oauth_token.token
user.oauth_token.issued_at = request.facebook.signed_request.oauth_token.issued_at
user.oauth_token.expires_at = request.facebook.signed_request.oauth_token.expires_at
user.oauth_token.save()
user.save()
# Attempt to extend the OAuth token, but ignore exceptions raised by
# bug #102727766518358 in the Facebook Platform.
#
# http://developers.facebook.com/bugs/102727766518358/
try:
user.oauth_token.extend()
except:
pass
request.facebook.user = user
# ... no signed request found.
else:
request.facebook = False
def process_request(self, request):
"""Process the signed request."""
if ENABLED_PATHS and DISABLED_PATHS:
raise ImproperlyConfigured(
'You may configure either FANDJANGO_ENABLED_PATHS '
'or FANDJANGO_DISABLED_PATHS, but not both.')
if DISABLED_PATHS and is_disabled_path(request.path):
return
if ENABLED_PATHS and not is_enabled_path(request.path):
return
# An error occured during authorization...
if 'error' in request.GET:
error = request.GET['error']
# The user refused to authorize the application...
if error == '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=FACEBOOK_APPLICATION_SECRET_KEY)
except SignedRequest.Error:
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
try:
user = User.objects.get(
facebook_id=request.facebook.signed_request.user.id)
except User.DoesNotExist:
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)
user = User.objects.create(
facebook_id=request.facebook.signed_request.user.id,
oauth_token=oauth_token)
user.synchronize()
# Update the user's details and OAuth token
else:
user.last_seen_at = datetime.now()
if 'signed_request' in request.REQUEST:
user.authorized = True
if request.facebook.signed_request.user.oauth_token:
user.oauth_token.token = request.facebook.signed_request.user.oauth_token.token
user.oauth_token.issued_at = request.facebook.signed_request.user.oauth_token.issued_at
user.oauth_token.expires_at = request.facebook.signed_request.user.oauth_token.expires_at
user.oauth_token.save()
user.save()
if not 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:
user.oauth_token.extend()
except:
pass
request.facebook.user = user
# ... no signed request found.
else:
request.facebook = False
