from time import time
import tornado.ioloop
import tornado.web
from threading import Timer

class MainHandler(tornado.web.RequestHandler):

    @tornado.web.asynchronous
    def get(self):
        self.write("requested at " + str(time()))
        Timer(10, self.on_response).start()

    def on_response(self):
        self.write("completed at " + str(time()))
        self.finish()



class Application(tornado.web.Application):
    def __init__(self):
        handlers = [
                (r"/", MainHandler),
                ]
        tornado.web.Application.__init__(self, handlers)

if __name__ == "__main__":
    app  = Application()
    app.listen(8888)
    tornado.ioloop.IOLoop.instance().start()