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# Copyright (c) 2016 Weitian LI <liweitianux@live.com>
# MIT license
"""
Web user interface (UI) of "fg21sim" based upon Tornado_ web server and
using the WebSocket_ protocol.
.. _Tornado: http://www.tornadoweb.org/
.. _WebSocket: https://en.wikipedia.org/wiki/WebSocket ,
http://caniuse.com/#feat=websockets
"""
import os
import tornado.web
from tornado.web import url
from .handlers import IndexHandler, LoginHandler, WSHandler
from .utils import gen_cookie_secret
from ..configs import ConfigManager
class Application(tornado.web.Application):
"""
Application of the "fg21sim" Web UI.
Attributes
----------
configmanager : `~fg21sim.configs.ConfigManager`
A ``ConfigManager`` instance, which saves the current configurations
status. The configuration operations (e.g., "set", "get", "load")
are performed on this instance, which is also passed to the
foregrounds simulation programs.
ws_clients : set
Current connected clients through WebSocket.
When a new WebSocket connection established, it is added to this
list, which is also removed from this list when the connection lost.
"""
def __init__(self, **kwargs):
self.configmanager = ConfigManager()
self.ws_clients = set()
# URL handlers
handlers = [
url(r"/", IndexHandler, name="index"),
url(r"/login", LoginHandler, name="login"),
url(r"/ws", WSHandler),
]
# Application settings
settings = {
# The static files will be served from the default "/static/" URI.
# Recommend to use `{{ static_url(filepath) }}` in the templates.
"static_path": os.path.join(os.path.dirname(__file__),
"static"),
"template_path": os.path.join(os.path.dirname(__file__),
"templates"),
# URL to be redirected to if the user is not logged in
"login_url": r"/login",
# Secret key used to sign the cookies
"cookie_secret": gen_cookie_secret(),
# Enable "cross-site request forgery" (XSRF)
"xsrf_cookies": True,
}
settings.update(kwargs)
super().__init__(handlers, **settings)
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