|
|
"""Tornado handlers for WebSocket <-> ZMQ sockets.
|
|
|
|
|
|
Authors:
|
|
|
|
|
|
* Brian Granger
|
|
|
"""
|
|
|
|
|
|
#-----------------------------------------------------------------------------
|
|
|
# Copyright (C) 2008-2011 The IPython Development Team
|
|
|
#
|
|
|
# Distributed under the terms of the BSD License. The full license is in
|
|
|
# the file COPYING, distributed as part of this software.
|
|
|
#-----------------------------------------------------------------------------
|
|
|
|
|
|
#-----------------------------------------------------------------------------
|
|
|
# Imports
|
|
|
#-----------------------------------------------------------------------------
|
|
|
|
|
|
import Cookie
|
|
|
import logging
|
|
|
from tornado import web
|
|
|
from tornado import websocket
|
|
|
|
|
|
from zmq.utils import jsonapi
|
|
|
|
|
|
from IPython.kernel.zmq.session import Session
|
|
|
from IPython.utils.jsonutil import date_default
|
|
|
from IPython.utils.py3compat import PY3
|
|
|
|
|
|
from .handlers import IPythonHandler
|
|
|
|
|
|
#-----------------------------------------------------------------------------
|
|
|
# ZMQ handlers
|
|
|
#-----------------------------------------------------------------------------
|
|
|
|
|
|
class ZMQStreamHandler(websocket.WebSocketHandler):
|
|
|
|
|
|
def clear_cookie(self, *args, **kwargs):
|
|
|
"""meaningless for websockets"""
|
|
|
pass
|
|
|
|
|
|
def _reserialize_reply(self, msg_list):
|
|
|
"""Reserialize a reply message using JSON.
|
|
|
|
|
|
This takes the msg list from the ZMQ socket, unserializes it using
|
|
|
self.session and then serializes the result using JSON. This method
|
|
|
should be used by self._on_zmq_reply to build messages that can
|
|
|
be sent back to the browser.
|
|
|
"""
|
|
|
idents, msg_list = self.session.feed_identities(msg_list)
|
|
|
msg = self.session.unserialize(msg_list)
|
|
|
try:
|
|
|
msg['header'].pop('date')
|
|
|
except KeyError:
|
|
|
pass
|
|
|
try:
|
|
|
msg['parent_header'].pop('date')
|
|
|
except KeyError:
|
|
|
pass
|
|
|
msg.pop('buffers')
|
|
|
return jsonapi.dumps(msg, default=date_default)
|
|
|
|
|
|
def _on_zmq_reply(self, msg_list):
|
|
|
# Sometimes this gets triggered when the on_close method is scheduled in the
|
|
|
# eventloop but hasn't been called.
|
|
|
if self.stream.closed(): return
|
|
|
try:
|
|
|
msg = self._reserialize_reply(msg_list)
|
|
|
except Exception:
|
|
|
self.log.critical("Malformed message: %r" % msg_list, exc_info=True)
|
|
|
else:
|
|
|
self.write_message(msg)
|
|
|
|
|
|
def allow_draft76(self):
|
|
|
"""Allow draft 76, until browsers such as Safari update to RFC 6455.
|
|
|
|
|
|
This has been disabled by default in tornado in release 2.2.0, and
|
|
|
support will be removed in later versions.
|
|
|
"""
|
|
|
return True
|
|
|
|
|
|
|
|
|
class AuthenticatedZMQStreamHandler(ZMQStreamHandler, IPythonHandler):
|
|
|
|
|
|
def open(self, kernel_id):
|
|
|
self.kernel_id = kernel_id.decode('ascii')
|
|
|
self.session = Session(config=self.config)
|
|
|
self.save_on_message = self.on_message
|
|
|
self.on_message = self.on_first_message
|
|
|
|
|
|
def _inject_cookie_message(self, msg):
|
|
|
"""Inject the first message, which is the document cookie,
|
|
|
for authentication."""
|
|
|
if not PY3 and isinstance(msg, unicode):
|
|
|
# Cookie constructor doesn't accept unicode strings
|
|
|
# under Python 2.x for some reason
|
|
|
msg = msg.encode('utf8', 'replace')
|
|
|
try:
|
|
|
identity, msg = msg.split(':', 1)
|
|
|
self.session.session = identity.decode('ascii')
|
|
|
except Exception:
|
|
|
logging.error("First ws message didn't have the form 'identity:[cookie]' - %r", msg)
|
|
|
|
|
|
try:
|
|
|
self.request._cookies = Cookie.SimpleCookie(msg)
|
|
|
except:
|
|
|
self.log.warn("couldn't parse cookie string: %s",msg, exc_info=True)
|
|
|
|
|
|
def on_first_message(self, msg):
|
|
|
self._inject_cookie_message(msg)
|
|
|
if self.get_current_user() is None:
|
|
|
self.log.warn("Couldn't authenticate WebSocket connection")
|
|
|
raise web.HTTPError(403)
|
|
|
self.on_message = self.save_on_message
|
