How to stop the tornado web server with ctrl+c?

Question

I am new to tornado web server. When I start the tornado web server using python main_tornado.py It is working. Please see the below code.

import tornado.ioloop
         


        

Answer 1

I'd say the cleanest, safest and most portable solution would be to put all closing and clean-up calls in a finally block instead of relying on KeyboardInterrupt exception:

import tornado.ioloop
import tornado.web

class MainHandler(tornado.web.RequestHandler):
    def get(self):
        self.write("Hello, world")

application = tornado.web.Application([
    (r"/", MainHandler),
])

# .instance() is deprecated in Tornado 5
loop = tornado.ioloop.IOLoop.current()

if __name__ == "__main__":
    try:
        print("Starting server")
        application.listen(8888)
        loop.start()
    except KeyboardInterrupt:
        pass
    finally:
        loop.stop()       # might be redundant, the loop has already stopped
        loop.close(True)  # needed to close all open sockets
    print("Server shut down, exiting...")