def start(app):
app.redis = client.Redis()
app.SessionHandler = SessionHandler
server = HTTPServer(app, xheaders=True)
server.listen(options.port)
server.redis = client.Redis()
server.SessionHandler = SessionHandler
install_tornado_shutdown_handler(IOLoop.instance(), server)
logging.info("start service at port = " + str(options.port) + "\n")
IOLoop.instance().start()
logging.info('Done. Bye.')
