|
|
"""A tornado based IPython notebook server."""
|
|
|
|
|
|
#-----------------------------------------------------------------------------
|
|
|
# Copyright (C) 2011 The IPython Development Team
|
|
|
#
|
|
|
# Distributed under the terms of the BSD License. The full license is in
|
|
|
# the file COPYING.txt, distributed as part of this software.
|
|
|
#-----------------------------------------------------------------------------
|
|
|
|
|
|
#-----------------------------------------------------------------------------
|
|
|
# Imports
|
|
|
#-----------------------------------------------------------------------------
|
|
|
|
|
|
import logging
|
|
|
import os
|
|
|
import signal
|
|
|
import sys
|
|
|
|
|
|
import zmq
|
|
|
|
|
|
# Install the pyzmq ioloop. This has to be done before anything else from
|
|
|
# tornado is imported.
|
|
|
from zmq.eventloop import ioloop
|
|
|
import tornado.ioloop
|
|
|
tornado.ioloop = ioloop
|
|
|
|
|
|
from tornado import httpserver
|
|
|
from tornado import web
|
|
|
|
|
|
from .kernelmanager import KernelManager
|
|
|
from .sessionmanager import SessionManager
|
|
|
from .handlers import (
|
|
|
MainHandler, NamedNotebookHandler,
|
|
|
KernelHandler, KernelActionHandler, ZMQStreamHandler,
|
|
|
NotebookRootHandler, NotebookHandler
|
|
|
)
|
|
|
from .routers import IOPubStreamRouter, ShellStreamRouter
|
|
|
from .notebookmanager import NotebookManager
|
|
|
|
|
|
from IPython.core.application import BaseIPythonApplication
|
|
|
from IPython.core.profiledir import ProfileDir
|
|
|
from IPython.frontend.qt.console.rich_ipython_widget import RichIPythonWidget
|
|
|
from IPython.zmq.session import Session
|
|
|
from IPython.zmq.zmqshell import ZMQInteractiveShell
|
|
|
from IPython.zmq.ipkernel import (
|
|
|
flags as ipkernel_flags,
|
|
|
aliases as ipkernel_aliases,
|
|
|
IPKernelApp
|
|
|
)
|
|
|
from IPython.utils.traitlets import Dict, Unicode, Int, Any, List, Enum
|
|
|
|
|
|
#-----------------------------------------------------------------------------
|
|
|
# Module globals
|
|
|
#-----------------------------------------------------------------------------
|
|
|
|
|
|
_kernel_id_regex = r"(?P<kernel_id>\w+-\w+-\w+-\w+-\w+)"
|
|
|
_kernel_action_regex = r"(?P<action>restart|interrupt)"
|
|
|
_notebook_id_regex = r"(?P<notebook_id>\w+-\w+-\w+-\w+-\w+)"
|
|
|
|
|
|
LOCALHOST = '127.0.0.1'
|
|
|
|
|
|
#-----------------------------------------------------------------------------
|
|
|
# The Tornado web application
|
|
|
#-----------------------------------------------------------------------------
|
|
|
|
|
|
class NotebookWebApplication(web.Application):
|
|
|
|
|
|
def __init__(self, kernel_manager, log, kernel_argv, config):
|
|
|
handlers = [
|
|
|
(r"/", MainHandler),
|
|
|
(r"/%s" % _notebook_id_regex, NamedNotebookHandler),
|
|
|
(r"/kernels", KernelHandler),
|
|
|
(r"/kernels/%s/%s" % (_kernel_id_regex, _kernel_action_regex), KernelActionHandler),
|
|
|
(r"/kernels/%s/iopub" % _kernel_id_regex, ZMQStreamHandler, dict(stream_name='iopub')),
|
|
|
(r"/kernels/%s/shell" % _kernel_id_regex, ZMQStreamHandler, dict(stream_name='shell')),
|
|
|
(r"/notebooks", NotebookRootHandler),
|
|
|
(r"/notebooks/%s" % _notebook_id_regex, NotebookHandler)
|
|
|
]
|
|
|
settings = dict(
|
|
|
template_path=os.path.join(os.path.dirname(__file__), "templates"),
|
|
|
static_path=os.path.join(os.path.dirname(__file__), "static"),
|
|
|
)
|
|
|
web.Application.__init__(self, handlers, **settings)
|
|
|
|
|
|
self.kernel_manager = kernel_manager
|
|
|
self.log = log
|
|
|
self.kernel_argv = kernel_argv
|
|
|
self.config = config
|
|
|
self._routers = {}
|
|
|
self._session_dict = {}
|
|
|
self.notebook_manager = NotebookManager(config=self.config)
|
|
|
|
|
|
#-------------------------------------------------------------------------
|
|
|
# Methods for managing kernels and sessions
|
|
|
#-------------------------------------------------------------------------
|
|
|
|
|
|
@property
|
|
|
def kernel_ids(self):
|
|
|
return self.kernel_manager.kernel_ids
|
|
|
|
|
|
def start_kernel(self):
|
|
|
kwargs = dict()
|
|
|
kwargs['extra_arguments'] = self.kernel_argv
|
|
|
kernel_id = self.kernel_manager.start_kernel(**kwargs)
|
|
|
self.log.info("Kernel started: %s" % kernel_id)
|
|
|
self.log.debug("Kernel args: %r" % kwargs)
|
|
|
self.start_session_manager(kernel_id)
|
|
|
return kernel_id
|
|
|
|
|
|
def start_session_manager(self, kernel_id):
|
|
|
sm = self.kernel_manager.create_session_manager(kernel_id)
|
|
|
self._session_dict[kernel_id] = sm
|
|
|
iopub_stream = sm.get_iopub_stream()
|
|
|
shell_stream = sm.get_shell_stream()
|
|
|
iopub_router = IOPubStreamRouter(
|
|
|
zmq_stream=iopub_stream, session=sm.session, config=self.config
|
|
|
)
|
|
|
shell_router = ShellStreamRouter(
|
|
|
zmq_stream=shell_stream, session=sm.session, config=self.config
|
|
|
)
|
|
|
self._routers[(kernel_id, 'iopub')] = iopub_router
|
|
|
self._routers[(kernel_id, 'shell')] = shell_router
|
|
|
|
|
|
def kill_kernel(self, kernel_id):
|
|
|
sm = self._session_dict.pop(kernel_id)
|
|
|
sm.stop()
|
|
|
self.kernel_manager.kill_kernel(kernel_id)
|
|
|
self.log.info("Kernel killed: %s" % kernel_id)
|
|
|
|
|
|
def interrupt_kernel(self, kernel_id):
|
|
|
self.kernel_manager.interrupt_kernel(kernel_id)
|
|
|
self.log.debug("Kernel interrupted: %s" % kernel_id)
|
|
|
|
|
|
def restart_kernel(self, kernel_id):
|
|
|
# Create the new kernel first so we can move the clients over.
|
|
|
new_kernel_id = self.start_kernel()
|
|
|
|
|
|
# Copy the clients over to the new routers.
|
|
|
old_iopub_router = self.get_router(kernel_id, 'iopub')
|
|
|
old_shell_router = self.get_router(kernel_id, 'shell')
|
|
|
new_iopub_router = self.get_router(new_kernel_id, 'iopub')
|
|
|
new_shell_router = self.get_router(new_kernel_id, 'shell')
|
|
|
new_iopub_router.copy_clients(old_iopub_router)
|
|
|
new_shell_router.copy_clients(old_shell_router)
|
|
|
|
|
|
# Now shutdown the old session and the kernel.
|
|
|
# TODO: This causes a hard crash in ZMQStream.close, which sets
|
|
|
# self.socket to None to hastily. We will need to fix this in PyZMQ
|
|
|
# itself. For now, we just leave the old kernel running :(
|
|
|
# Maybe this is fixed now, but nothing was changed really.
|
|
|
self.kill_kernel(kernel_id)
|
|
|
|
|
|
self.log.debug("Kernel restarted: %s -> %s" % (kernel_id, new_kernel_id))
|
|
|
return new_kernel_id
|
|
|
|
|
|
def get_router(self, kernel_id, stream_name):
|
|
|
router = self._routers[(kernel_id, stream_name)]
|
|
|
return router
|
|
|
|
|
|
|
|
|
|
|
|
#-----------------------------------------------------------------------------
|
|
|
# Aliases and Flags
|
|
|
#-----------------------------------------------------------------------------
|
|
|
|
|
|
flags = dict(ipkernel_flags)
|
|
|
|
|
|
# the flags that are specific to the frontend
|
|
|
# these must be scrubbed before being passed to the kernel,
|
|
|
# or it will raise an error on unrecognized flags
|
|
|
notebook_flags = []
|
|
|
|
|
|
aliases = dict(ipkernel_aliases)
|
|
|
|
|
|
aliases.update(dict(
|
|
|
ip = 'IPythonNotebookApp.ip',
|
|
|
port = 'IPythonNotebookApp.port',
|
|
|
colors = 'ZMQInteractiveShell.colors',
|
|
|
editor = 'RichIPythonWidget.editor',
|
|
|
))
|
|
|
|
|
|
#-----------------------------------------------------------------------------
|
|
|
# IPythonNotebookApp
|
|
|
#-----------------------------------------------------------------------------
|
|
|
|
|
|
class IPythonNotebookApp(BaseIPythonApplication):
|
|
|
name = 'ipython-notebook'
|
|
|
default_config_file_name='ipython_notebook_config.py'
|
|
|
|
|
|
description = """
|
|
|
The IPython HTML Notebook.
|
|
|
|
|
|
This launches a Tornado based HTML Notebook Server that serves up an
|
|
|
HTML5/Javascript Notebook client.
|
|
|
"""
|
|
|
|
|
|
classes = [IPKernelApp, ZMQInteractiveShell, ProfileDir, Session,
|
|
|
KernelManager, SessionManager, RichIPythonWidget]
|
|
|
flags = Dict(flags)
|
|
|
aliases = Dict(aliases)
|
|
|
|
|
|
kernel_argv = List(Unicode)
|
|
|
|
|
|
log_level = Enum((0,10,20,30,40,50,'DEBUG','INFO','WARN','ERROR','CRITICAL'),
|
|
|
default_value=logging.INFO,
|
|
|
config=True,
|
|
|
help="Set the log level by value or name.")
|
|
|
|
|
|
# connection info:
|
|
|
ip = Unicode(LOCALHOST, config=True,
|
|
|
help="The IP address the notebook server will listen on."
|
|
|
)
|
|
|
|
|
|
port = Int(8888, config=True,
|
|
|
help="The port the notebook server will listen on."
|
|
|
)
|
|
|
|
|
|
# the factory for creating a widget
|
|
|
widget_factory = Any(RichIPythonWidget)
|
|
|
|
|
|
def parse_command_line(self, argv=None):
|
|
|
super(IPythonNotebookApp, self).parse_command_line(argv)
|
|
|
if argv is None:
|
|
|
argv = sys.argv[1:]
|
|
|
|
|
|
self.kernel_argv = list(argv) # copy
|
|
|
# kernel should inherit default config file from frontend
|
|
|
self.kernel_argv.append("--KernelApp.parent_appname='%s'"%self.name)
|
|
|
# scrub frontend-specific flags
|
|
|
for a in argv:
|
|
|
if a.startswith('-') and a.lstrip('-') in notebook_flags:
|
|
|
self.kernel_argv.remove(a)
|
|
|
|
|
|
def init_kernel_manager(self):
|
|
|
# Don't let Qt or ZMQ swallow KeyboardInterupts.
|
|
|
signal.signal(signal.SIGINT, signal.SIG_DFL)
|
|
|
|
|
|
# Create a KernelManager and start a kernel.
|
|
|
self.kernel_manager = KernelManager(config=self.config, log=self.log)
|
|
|
|
|
|
def init_logging(self):
|
|
|
super(IPythonNotebookApp, self).init_logging()
|
|
|
# This prevents double log messages because tornado use a root logger that
|
|
|
# self.log is a child of. The logging module dipatches log messages to a log
|
|
|
# and all of its ancenstors until propagate is set to False.
|
|
|
self.log.propagate = False
|
|
|
|
|
|
def initialize(self, argv=None):
|
|
|
super(IPythonNotebookApp, self).initialize(argv)
|
|
|
self.init_kernel_manager()
|
|
|
self.web_app = NotebookWebApplication(
|
|
|
self.kernel_manager, self.log, self.kernel_argv, self.config
|
|
|
)
|
|
|
self.http_server = httpserver.HTTPServer(self.web_app)
|
|
|
self.http_server.listen(self.port)
|
|
|
|
|
|
def start(self):
|
|
|
self.log.info("The IPython Notebook is running at: http://%s:%i" % (self.ip, self.port))
|
|
|
ioloop.IOLoop.instance().start()
|
|
|
|
|
|
#-----------------------------------------------------------------------------
|
|
|
# Main entry point
|
|
|
#-----------------------------------------------------------------------------
|
|
|
|
|
|
def launch_new_instance():
|
|
|
app = IPythonNotebookApp()
|
|
|
app.initialize()
|
|
|
app.start()
|
|
|
|
|
|
|