gistfile1.py

import os
import struct
import threading
from tornado import ioloop
import tornado.web
from tornado import httpserver

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


class WebApp(object):
    
    def __init__(self, port=9494):
        self.port = port
        self.server = None
        self.ioloop_thread = None
    
    def setup(self):
        """set up the application
        
        could just as easily be done in init
        """
        application = tornado.web.Application([(r"/(.*)", MainHandler)])
        self.server = httpserver.HTTPServer(application)
        self.server.listen(self.port)
    
    def start_loop(self):
        """Start the IOLoop in a background thread
        
        only if it isn't running already
        """
        io_loop = ioloop.IOLoop.instance()
        if not io_loop._running:
            # if a loop is not already running,
            # start it in a background thread
            self.ioloop_thread = thread = threading.Thread(target=io_loop.start)
            thread.start()

if __name__ == "__main__":
    app = WebApp()
    app.setup()
    app.start_loop()
    
    import webbrowser
    webbrowser.open("http://localhost:%i" % app.port)