import os

import tornado.ioloop

from tornado.options import define, options, parse_command_line

import tornado.web

import socketio

define("port", default=8888, help="run on the given port", type=int)

define("debug", default=False, help="run in debug mode")

sio = socketio.AsyncServer(async_mode='tornado')

class MainHandler(tornado.web.RequestHandler):

def get(self):

self.render("latency.html")

@sio.on('ping_from_client')

async def ping(sid):

await sio.emit('pong_from_server', room=sid)

def main():

parse_command_line()

app = tornado.web.Application(

[

(r"/", MainHandler),

(r"/socket.io/", socketio.get_tornado_handler(sio)),

],

template_path=os.path.join(os.path.dirname(__file__), "templates"),

static_path=os.path.join(os.path.dirname(__file__), "static"),

debug=options.debug,

)

app.listen(options.port)

tornado.ioloop.IOLoop.current().start()

if __name__ == "__main__":

main()