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#!/usr/bin/env python3
# -*- mode: python -*-
#
# Copyright (c) 2016 Weitian LI <liweitianux@live.com>
# MIT license
"""
Start (and/or control) the Web user interface (UI) of "fg21sim",
which is built using the Tornado_ web server and WebSocket_ protocol.
.. _Tornado: http://www.tornadoweb.org/
.. _WebSocket: https://en.wikipedia.org/wiki/WebSocket ,
http://caniuse.com/#feat=websockets
"""
import os
import sys
import logging
import ipaddress
import tornado.ioloop
from tornado.options import define, options, parse_command_line
from fg21sim.configs import configs
from fg21sim.utils import setup_logging
from fg21sim.webui import make_application
# Define options in the global namespace
# These options can also be used in other modules
define("port", default=21127, type=int, help="Server listen port")
define("debug", default=False, help="Enable the debug mode")
define("no_browser", default=False,
help="Do not open the Web UI in a browser after startup")
define("hosts_allowed", default="any", type=str,
help=("Hosts allowed to access the Web UI. "
"The network addresses should be given in CIDR format, e.g., "
"'192.168.0.0/24'. "
"Specify 'any' to allow any hosts. "
"Note that the localhost/127.0.0.1 is always allowed."))
def main():
options.logging = None
parse_command_line()
# Validate the value of ``options.hosts_allowed``
if options.hosts_allowed.upper() != "ANY":
try:
ipaddress.ip_network(options.hosts_allowed)
except ValueError as e:
raise ValueError("Option 'hosts_allowed' invalid: " + str(e))
loglevel = "DEBUG" if options.debug else None
setup_logging(dict_config=configs.logging, level=loglevel)
tool = os.path.basename(sys.argv[0])
logger = logging.getLogger(tool)
logger.info("COMMAND: {0}".format(" ".join(sys.argv)))
application = make_application(debug=options.debug)
application.listen(options.port)
logger.info("Tornado started on: {protocol}://{host}:{port}".format(
protocol="http", host="localhost", port=options.port))
logger.info("Hosts allowed to access the Web UI: {0}".format(
options.hosts_allowed))
print("DEBUG: before IOLoop")
tornado.ioloop.IOLoop.current().start()
print("DEBUG: after IOLoop")
if __name__ == "__main__":
main()
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