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- import logging
- import random
- 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)
- class MainHandler(tornado.web.RequestHandler):
- @tornado.web.asynchronous
- def get(self):
- import tornado.ioloop
- self.scheduler = tornado.ioloop.PeriodicCallback(self._check, 1e3)
- self.scheduler.start()
- def _check(self):
- if self._are_where_there_yet():
- self.scheduler.stop()
- self.write("Hello, world")
- self.finish()
- def _are_where_there_yet(self):
- n = random.randint(1,10)
- logging.info("current value: %s", n)
- return n == 5
- def main():
- tornado.options.parse_command_line()
- application = tornado.web.Application([
- (r"/", MainHandler),
- ])
- http_server = tornado.httpserver.HTTPServer(application)
- http_server.listen(options.port)
- tornado.ioloop.IOLoop.instance().start()
- if __name__ == "__main__":
- main()
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