def init_facebook(self):
"""Sets up the request specific Facebook and User instance"""
facebook = Facebook()
user = None
# initial facebook request comes in as a POST with a signed_request
if u"signed_request" in self.request.POST:
facebook.load_signed_request(self.request.get("signed_request"))
# we reset the method to GET because a request from facebook with a
# signed_request uses POST for security reasons, despite it
# actually being a GET. in webapp causes loss of request.POST data.
self.request.method = u"GET"
self.set_cookie("u", facebook.user_cookie, datetime.timedelta(minutes=1440))
elif "u" in self.request.cookies:
facebook.load_signed_request(self.request.cookies.get("u"))
# try to load or create a user object
if facebook.user_id:
user = User.get_by_key_name(facebook.user_id)
if user:
# update stored access_token
if facebook.access_token and facebook.access_token != user.access_token:
user.access_token = facebook.access_token
user.put()
# refresh data if we failed in doing so after a realtime ping
if user.dirty:
user.refresh_data()
# restore stored access_token if necessary
if not facebook.access_token:
facebook.access_token = user.access_token
if not user and facebook.access_token:
me = facebook.api(u"/me", {u"fields": User.get_fields()})
try:
friends = [user[u"id"] for user in me[u"friends"][u"data"]]
user = User(
key_name=facebook.user_id,
user_id=facebook.user_id,
friends=friends,
access_token=facebook.access_token,
name=me[u"name"],
email=me.get(u"email"),
picture=me[u"picture"],
)
user.put()
except KeyError, ex:
pass # ignore if can't get the minimum fields
