#!/usr/bin/env python
#
# Copyright 2009 Facebook
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
import os.path
import tornado.auth
import tornado.escape
import tornado.httpserver
import tornado.ioloop
import tornado.options
import tornado.web
from tornado.options import define, options
define("port", default=8888, help="run on the given port", type=int)
define("facebook_api_key", help="your Facebook application API key", type=str)
define("facebook_secret", help="your Facebook application secret", type=str)
class Application(tornado.web.Application):
def __init__(self):
handlers = [
(r"/", MainHandler),
(r"/auth/login", AuthLoginHandler),
(r"/auth/logout", AuthLogoutHandler),
]
settings = dict(
cookie_secret="__TODO:_GENERATE_YOUR_OWN_RANDOM_VALUE_HERE__",
login_url="/auth/login",
template_path=os.path.join(os.path.dirname(__file__), "templates"),
static_path=os.path.join(os.path.dirname(__file__), "static"),
xsrf_cookies=True,
facebook_api_key=options.facebook_api_key,
facebook_secret=options.facebook_secret,
ui_modules={"Post": PostModule},
debug=True,
autoescape=None,
)
tornado.web.Application.__init__(self, handlers, **settings)
class BaseHandler(tornado.web.RequestHandler):
def get_current_user(self):
user_json = self.get_secure_cookie("fbdemo_user")
if not user_json: return None
return tornado.escape.json_decode(user_json)
class MainHandler(BaseHandler, tornado.auth.FacebookGraphMixin):
@tornado.web.authenticated
@tornado.web.asynchronous
def get(self):
self.facebook_request("/me/home", self._on_stream,
access_token=self.current_user["access_token"])
def _on_stream(self, stream):
if stream is None:
# Session may have expired
self.redirect("/auth/login")
return
self.render("stream.html", stream=stream)
class AuthLoginHandler(BaseHandler, tornado.auth.FacebookGraphMixin):
@tornado.web.asynchronous
def get(self):
my_url = (self.request.protocol + "://" + self.request.host +
"/auth/login?next=" +
tornado.escape.url_escape(self.get_argument("next", "/")))
if self.get_argument("code", False):
self.get_authenticated_user(
redirect_uri=my_url,
client_id=self.settings["facebook_api_key"],
client_secret=self.settings["facebook_secret"],
code=self.get_argument("code"),
callback=self._on_auth)
return
self.authorize_redirect(redirect_uri=my_url,
client_id=self.settings["facebook_api_key"],
extra_params={"scope": "read_stream"})
def _on_auth(self, user):
if not user:
raise tornado.web.HTTPError(500, "Facebook auth failed")
self.set_secure_cookie("fbdemo_user", tornado.escape.json_encode(user))
self.redirect(self.get_argument("next", "/"))
class AuthLogoutHandler(BaseHandler, tornado.auth.FacebookGraphMixin):
def get(self):
self.clear_cookie("fbdemo_user")
self.redirect(self.get_argument("next", "/"))
class PostModule(tornado.web.UIModule):
def render(self, post):
return self.render_string("modules/post.html", post=post)
def main():
tornado.options.parse_command_line()
if not (options.facebook_api_key and options.facebook_secret):
print("--facebook_api_key and --facebook_secret must be set")
return
http_server = tornado.httpserver.HTTPServer(Application())
http_server.listen(options.port)
tornado.ioloop.IOLoop.current().start()
if __name__ == "__main__":
main()
