OpenSlides/openslides/utils/tornado_webserver.py
2014-10-14 17:14:52 +02:00

98 lines
3.3 KiB
Python

import os
import posixpath
from urllib.parse import unquote
from django.conf import settings
from django.core.wsgi import get_wsgi_application
from sockjs.tornado import SockJSRouter, SockJSConnection
from tornado.httpserver import HTTPServer
from tornado.ioloop import IOLoop
from tornado.options import parse_command_line
from tornado.web import (
Application,
FallbackHandler,
StaticFileHandler,
HTTPError
)
from tornado.wsgi import WSGIContainer
class DjangoStaticFileHandler(StaticFileHandler):
"""Handels static data by using the django finders."""
def initialize(self):
"""Overwrite some attributes."""
# NOTE: root is never actually used and default_filename is not
# supported (must always be None)
self.root = ''
self.default_filename = None
@classmethod
def get_absolute_path(cls, root, path):
from django.contrib.staticfiles import finders
normalized_path = posixpath.normpath(unquote(path)).lstrip('/')
absolute_path = finders.find(normalized_path)
return absolute_path
def validate_absolute_path(self, root, absolute_path):
# differences from base implementation:
# - we ignore self.root since our files do not necessarily have
# a shared root prefix
# - we do not handle self.default_filename (we do not use it and it
# does not make much sense here anyway)
if absolute_path is None or not os.path.exists(absolute_path):
raise HTTPError(404)
if not os.path.isfile(absolute_path):
raise HTTPError(403, 'The requested resource is not a file.')
return absolute_path
class ProjectorSocketHandler(SockJSConnection):
"""
Handels the websocket for the projector.
"""
waiters = set()
def on_open(self, info):
ProjectorSocketHandler.waiters.add(self)
def on_close(self):
ProjectorSocketHandler.waiters.remove(self)
@classmethod
def send_updates(cls, data):
for waiter in cls.waiters:
waiter.send(data)
def run_tornado(addr, port):
# Don't try to read the command line args from openslides
parse_command_line(args=[])
# Print listening address and port to command line
if addr == '0.0.0.0':
url_string = "the machine's local ip address"
else:
url_string = 'http://%s:%s' % (addr, port)
# TODO: don't use print, use django logging
print("Starting OpenSlides' tornado webserver listening to %(url_string)s" % {'url_string': url_string})
# Setup WSGIContainer
app = WSGIContainer(get_wsgi_application())
# Collect urls
projectpr_socket_js_router = SockJSRouter(ProjectorSocketHandler, '/projector/socket')
from openslides.core.chatbox import ChatboxSocketHandler
chatbox_socket_js_router = SockJSRouter(ChatboxSocketHandler, '/core/chatbox')
other_urls = [
(r"%s(.*)" % settings.STATIC_URL, DjangoStaticFileHandler),
(r'%s(.*)' % settings.MEDIA_URL, StaticFileHandler, {'path': settings.MEDIA_ROOT}),
('.*', FallbackHandler, dict(fallback=app))]
# Start the application
debug = settings.DEBUG
tornado_app = Application(projectpr_socket_js_router.urls + chatbox_socket_js_router.urls + other_urls, debug=debug)
server = HTTPServer(tornado_app)
server.listen(port=port, address=addr)
IOLoop.instance().start()