|
|
"""Tornado handlers for the notebook.
|
|
|
|
|
|
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 .base import IPythonHandler
|
|
|
|
|
|
#-----------------------------------------------------------------------------
|
|
|
# Kernel handlers
|
|
|
#-----------------------------------------------------------------------------
|
|
|
|
|
|
|
|
|
class MainKernelHandler(IPythonHandler):
|
|
|
|
|
|
@web.authenticated
|
|
|
def get(self):
|
|
|
km = self.kernel_manager
|
|
|
self.finish(jsonapi.dumps(km.list_kernel_ids()))
|
|
|
|
|
|
@web.authenticated
|
|
|
def post(self):
|
|
|
km = self.kernel_manager
|
|
|
nbm = self.notebook_manager
|
|
|
notebook_id = self.get_argument('notebook', default=None)
|
|
|
kernel_id = km.start_kernel(notebook_id, cwd=nbm.notebook_dir)
|
|
|
data = {'ws_url':self.ws_url,'kernel_id':kernel_id}
|
|
|
self.set_header('Location', '{0}kernels/{1}'.format(self.base_kernel_url, kernel_id))
|
|
|
self.finish(jsonapi.dumps(data))
|
|
|
|
|
|
|
|
|
class KernelHandler(IPythonHandler):
|
|
|
|
|
|
SUPPORTED_METHODS = ('DELETE')
|
|
|
|
|
|
@web.authenticated
|
|
|
def delete(self, kernel_id):
|
|
|
km = self.kernel_manager
|
|
|
km.shutdown_kernel(kernel_id)
|
|
|
self.set_status(204)
|
|
|
self.finish()
|
|
|
|
|
|
|
|
|
class KernelActionHandler(IPythonHandler):
|
|
|
|
|
|
@web.authenticated
|
|
|
def post(self, kernel_id, action):
|
|
|
km = self.kernel_manager
|
|
|
if action == 'interrupt':
|
|
|
km.interrupt_kernel(kernel_id)
|
|
|
self.set_status(204)
|
|
|
if action == 'restart':
|
|
|
km.restart_kernel(kernel_id)
|
|
|
data = {'ws_url':self.ws_url, 'kernel_id':kernel_id}
|
|
|
self.set_header('Location', '{0}kernels/{1}'.format(self.base_kernel_url, kernel_id))
|
|
|
self.write(jsonapi.dumps(data))
|
|
|
self.finish()
|
|
|
|
|
|
|
|
|
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
|
|
|
|
|
|
|
|
|
class ZMQChannelHandler(AuthenticatedZMQStreamHandler):
|
|
|
|
|
|
@property
|
|
|
def max_msg_size(self):
|
|
|
return self.settings.get('max_msg_size', 65535)
|
|
|
|
|
|
def create_stream(self):
|
|
|
km = self.kernel_manager
|
|
|
meth = getattr(km, 'connect_%s' % self.channel)
|
|
|
self.zmq_stream = meth(self.kernel_id, identity=self.session.bsession)
|
|
|
|
|
|
def initialize(self, *args, **kwargs):
|
|
|
self.zmq_stream = None
|
|
|
|
|
|
def on_first_message(self, msg):
|
|
|
try:
|
|
|
super(ZMQChannelHandler, self).on_first_message(msg)
|
|
|
except web.HTTPError:
|
|
|
self.close()
|
|
|
return
|
|
|
try:
|
|
|
self.create_stream()
|
|
|
except web.HTTPError:
|
|
|
# WebSockets don't response to traditional error codes so we
|
|
|
# close the connection.
|
|
|
if not self.stream.closed():
|
|
|
self.stream.close()
|
|
|
self.close()
|
|
|
else:
|
|
|
self.zmq_stream.on_recv(self._on_zmq_reply)
|
|
|
|
|
|
def on_message(self, msg):
|
|
|
if len(msg) < self.max_msg_size:
|
|
|
msg = jsonapi.loads(msg)
|
|
|
self.session.send(self.zmq_stream, msg)
|
|
|
|
|
|
def on_close(self):
|
|
|
# This method can be called twice, once by self.kernel_died and once
|
|
|
# from the WebSocket close event. If the WebSocket connection is
|
|
|
# closed before the ZMQ streams are setup, they could be None.
|
|
|
if self.zmq_stream is not None and not self.zmq_stream.closed():
|
|
|
self.zmq_stream.on_recv(None)
|
|
|
self.zmq_stream.close()
|
|
|
|
|
|
|
|
|
class IOPubHandler(ZMQChannelHandler):
|
|
|
channel = 'iopub'
|
|
|
|
|
|
def create_stream(self):
|
|
|
super(IOPubHandler, self).create_stream()
|
|
|
km = self.kernel_manager
|
|
|
km.add_restart_callback(self.kernel_id, self.on_kernel_restarted)
|
|
|
km.add_restart_callback(self.kernel_id, self.on_restart_failed, 'dead')
|
|
|
|
|
|
def on_close(self):
|
|
|
km = self.kernel_manager
|
|
|
if self.kernel_id in km:
|
|
|
km.remove_restart_callback(
|
|
|
self.kernel_id, self.on_kernel_restarted,
|
|
|
)
|
|
|
km.remove_restart_callback(
|
|
|
self.kernel_id, self.on_restart_failed, 'dead',
|
|
|
)
|
|
|
super(IOPubHandler, self).on_close()
|
|
|
|
|
|
def _send_status_message(self, status):
|
|
|
msg = self.session.msg("status",
|
|
|
{'execution_state': status}
|
|
|
)
|
|
|
self.write_message(jsonapi.dumps(msg, default=date_default))
|
|
|
|
|
|
def on_kernel_restarted(self):
|
|
|
logging.warn("kernel %s restarted", self.kernel_id)
|
|
|
self._send_status_message('restarting')
|
|
|
|
|
|
def on_restart_failed(self):
|
|
|
logging.error("kernel %s restarted failed!", self.kernel_id)
|
|
|
self._send_status_message('dead')
|
|
|
|
|
|
def on_message(self, msg):
|
|
|
"""IOPub messages make no sense"""
|
|
|
pass
|
|
|
|
|
|
class ShellHandler(ZMQChannelHandler):
|
|
|
channel = 'shell'
|
|
|
|
|
|
class StdinHandler(ZMQChannelHandler):
|
|
|
channel = 'stdin'
|
|
|
|
