facebook.py

class FacebookGraphLoginHandler(tornado.web.RequestHandler, tornado.auth.FacebookGraphMixin):
	@tornado.gen.coroutine
	def get(self):
		if self.get_argument("code", False):
			user = yield self.get_authenticated_user(
			redirect_uri='http://localhost:8888/facebook',
			client_id=self.settings["facebook_api_key"],
			client_secret=self.settings["facebook_secret"],
			code=self.get_argument("code"))
			# Save the user with e.g. set_secure_cookie
			print user
		else:
			yield self.authorize_redirect(
			redirect_uri='http://localhost:8888/facebook',
			client_id=self.settings["facebook_api_key"],
			extra_params={"scope": "read_stream,offline_access"})