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# coding: utf-8
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"""A tornado based IPython notebook server.
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Authors:
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* Brian Granger
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"""
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from __future__ import print_function
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#-----------------------------------------------------------------------------
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# Copyright (C) 2013 The IPython Development Team
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#
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# Distributed under the terms of the BSD License. The full license is in
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# the file COPYING, distributed as part of this software.
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#-----------------------------------------------------------------------------
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#-----------------------------------------------------------------------------
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# Imports
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#-----------------------------------------------------------------------------
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# stdlib
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import errno
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import io
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import json
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import logging
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import os
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import random
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import select
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import signal
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import socket
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import sys
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import threading
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import time
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import webbrowser
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# Third party
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# check for pyzmq 2.1.11
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from IPython.utils.zmqrelated import check_for_zmq
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check_for_zmq('2.1.11', 'IPython.html')
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from jinja2 import Environment, FileSystemLoader
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# Install the pyzmq ioloop. This has to be done before anything else from
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# tornado is imported.
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from zmq.eventloop import ioloop
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ioloop.install()
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# check for tornado 3.1.0
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msg = "The IPython Notebook requires tornado >= 3.1.0"
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try:
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import tornado
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except ImportError:
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raise ImportError(msg)
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try:
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version_info = tornado.version_info
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except AttributeError:
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raise ImportError(msg + ", but you have < 1.1.0")
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if version_info < (3,1,0):
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raise ImportError(msg + ", but you have %s" % tornado.version)
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from tornado import httpserver
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from tornado import web
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# Our own libraries
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from IPython.html import DEFAULT_STATIC_FILES_PATH
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from .base.handlers import Template404
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from .log import log_request
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from .services.kernels.kernelmanager import MappingKernelManager
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from .services.notebooks.nbmanager import NotebookManager
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from .services.notebooks.filenbmanager import FileNotebookManager
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from .services.clusters.clustermanager import ClusterManager
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from .services.sessions.sessionmanager import SessionManager
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from .base.handlers import AuthenticatedFileHandler, FileFindHandler
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from IPython.config import Config
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from IPython.config.application import catch_config_error, boolean_flag
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from IPython.core.application import BaseIPythonApplication
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from IPython.core.profiledir import ProfileDir
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from IPython.consoleapp import IPythonConsoleApp
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from IPython.kernel import swallow_argv
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from IPython.kernel.zmq.session import default_secure
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from IPython.kernel.zmq.kernelapp import (
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kernel_flags,
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kernel_aliases,
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)
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from IPython.nbformat.sign import NotebookNotary
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from IPython.utils.importstring import import_item
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from IPython.utils import submodule
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from IPython.utils.traitlets import (
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Dict, Unicode, Integer, List, Bool, Bytes,
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DottedObjectName, TraitError,
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)
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from IPython.utils import py3compat
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from IPython.utils.path import filefind, get_ipython_dir
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from .utils import url_path_join
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#-----------------------------------------------------------------------------
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# Module globals
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#-----------------------------------------------------------------------------
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_examples = """
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ipython notebook # start the notebook
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ipython notebook --profile=sympy # use the sympy profile
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ipython notebook --certfile=mycert.pem # use SSL/TLS certificate
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"""
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#-----------------------------------------------------------------------------
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# Helper functions
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#-----------------------------------------------------------------------------
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def random_ports(port, n):
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"""Generate a list of n random ports near the given port.
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The first 5 ports will be sequential, and the remaining n-5 will be
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randomly selected in the range [port-2*n, port+2*n].
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"""
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for i in range(min(5, n)):
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yield port + i
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for i in range(n-5):
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yield max(1, port + random.randint(-2*n, 2*n))
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def load_handlers(name):
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"""Load the (URL pattern, handler) tuples for each component."""
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name = 'IPython.html.' + name
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mod = __import__(name, fromlist=['default_handlers'])
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return mod.default_handlers
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#-----------------------------------------------------------------------------
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# The Tornado web application
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#-----------------------------------------------------------------------------
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class NotebookWebApplication(web.Application):
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def __init__(self, ipython_app, kernel_manager, notebook_manager,
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cluster_manager, session_manager, log, base_url,
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settings_overrides, jinja_env_options):
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settings = self.init_settings(
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ipython_app, kernel_manager, notebook_manager, cluster_manager,
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session_manager, log, base_url, settings_overrides, jinja_env_options)
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handlers = self.init_handlers(settings)
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super(NotebookWebApplication, self).__init__(handlers, **settings)
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def init_settings(self, ipython_app, kernel_manager, notebook_manager,
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cluster_manager, session_manager, log, base_url,
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settings_overrides, jinja_env_options=None):
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# Python < 2.6.5 doesn't accept unicode keys in f(**kwargs), and
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# base_url will always be unicode, which will in turn
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# make the patterns unicode, and ultimately result in unicode
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# keys in kwargs to handler._execute(**kwargs) in tornado.
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# This enforces that base_url be ascii in that situation.
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#
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# Note that the URLs these patterns check against are escaped,
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# and thus guaranteed to be ASCII: 'héllo' is really 'h%C3%A9llo'.
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base_url = py3compat.unicode_to_str(base_url, 'ascii')
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template_path = settings_overrides.get("template_path", os.path.join(os.path.dirname(__file__), "templates"))
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jenv_opt = jinja_env_options if jinja_env_options else {}
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env = Environment(loader=FileSystemLoader(template_path),**jenv_opt )
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settings = dict(
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# basics
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log_function=log_request,
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base_url=base_url,
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template_path=template_path,
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static_path=ipython_app.static_file_path,
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static_handler_class = FileFindHandler,
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static_url_prefix = url_path_join(base_url,'/static/'),
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# authentication
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cookie_secret=ipython_app.cookie_secret,
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login_url=url_path_join(base_url,'/login'),
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password=ipython_app.password,
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# managers
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kernel_manager=kernel_manager,
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notebook_manager=notebook_manager,
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cluster_manager=cluster_manager,
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session_manager=session_manager,
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# IPython stuff
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nbextensions_path = ipython_app.nbextensions_path,
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mathjax_url=ipython_app.mathjax_url,
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config=ipython_app.config,
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jinja2_env=env,
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)
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# allow custom overrides for the tornado web app.
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settings.update(settings_overrides)
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return settings
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def init_handlers(self, settings):
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# Load the (URL pattern, handler) tuples for each component.
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handlers = []
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handlers.extend(load_handlers('base.handlers'))
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handlers.extend(load_handlers('tree.handlers'))
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handlers.extend(load_handlers('auth.login'))
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handlers.extend(load_handlers('auth.logout'))
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handlers.extend(load_handlers('notebook.handlers'))
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handlers.extend(load_handlers('nbconvert.handlers'))
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handlers.extend(load_handlers('services.kernels.handlers'))
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handlers.extend(load_handlers('services.notebooks.handlers'))
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handlers.extend(load_handlers('services.clusters.handlers'))
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handlers.extend(load_handlers('services.sessions.handlers'))
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handlers.extend(load_handlers('services.nbconvert.handlers'))
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# FIXME: /files/ should be handled by the Contents service when it exists
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nbm = settings['notebook_manager']
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if hasattr(nbm, 'notebook_dir'):
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handlers.extend([
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(r"/files/(.*)", AuthenticatedFileHandler, {'path' : nbm.notebook_dir}),
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(r"/nbextensions/(.*)", FileFindHandler, {'path' : settings['nbextensions_path']}),
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])
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# prepend base_url onto the patterns that we match
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new_handlers = []
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for handler in handlers:
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pattern = url_path_join(settings['base_url'], handler[0])
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new_handler = tuple([pattern] + list(handler[1:]))
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new_handlers.append(new_handler)
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# add 404 on the end, which will catch everything that falls through
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new_handlers.append((r'(.*)', Template404))
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return new_handlers
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class NbserverListApp(BaseIPythonApplication):
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description="List currently running notebook servers in this profile."
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flags = dict(
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json=({'NbserverListApp': {'json': True}},
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"Produce machine-readable JSON output."),
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)
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json = Bool(False, config=True,
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help="If True, each line of output will be a JSON object with the "
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"details from the server info file.")
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def start(self):
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if not self.json:
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print("Currently running servers:")
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for serverinfo in list_running_servers(self.profile):
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if self.json:
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print(json.dumps(serverinfo))
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else:
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print(serverinfo['url'], "::", serverinfo['notebook_dir'])
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#-----------------------------------------------------------------------------
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# Aliases and Flags
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#-----------------------------------------------------------------------------
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flags = dict(kernel_flags)
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flags['no-browser']=(
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{'NotebookApp' : {'open_browser' : False}},
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"Don't open the notebook in a browser after startup."
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)
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flags['no-mathjax']=(
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{'NotebookApp' : {'enable_mathjax' : False}},
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"""Disable MathJax
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MathJax is the javascript library IPython uses to render math/LaTeX. It is
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very large, so you may want to disable it if you have a slow internet
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connection, or for offline use of the notebook.
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When disabled, equations etc. will appear as their untransformed TeX source.
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"""
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)
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# Add notebook manager flags
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flags.update(boolean_flag('script', 'FileNotebookManager.save_script',
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'Auto-save a .py script everytime the .ipynb notebook is saved',
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'Do not auto-save .py scripts for every notebook'))
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# the flags that are specific to the frontend
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# these must be scrubbed before being passed to the kernel,
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# or it will raise an error on unrecognized flags
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notebook_flags = ['no-browser', 'no-mathjax', 'script', 'no-script']
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aliases = dict(kernel_aliases)
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aliases.update({
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'ip': 'NotebookApp.ip',
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'port': 'NotebookApp.port',
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'port-retries': 'NotebookApp.port_retries',
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'transport': 'KernelManager.transport',
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'keyfile': 'NotebookApp.keyfile',
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'certfile': 'NotebookApp.certfile',
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'notebook-dir': 'NotebookApp.notebook_dir',
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'browser': 'NotebookApp.browser',
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})
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# remove ipkernel flags that are singletons, and don't make sense in
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# multi-kernel evironment:
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aliases.pop('f', None)
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notebook_aliases = [u'port', u'port-retries', u'ip', u'keyfile', u'certfile',
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u'notebook-dir', u'profile', u'profile-dir', 'browser']
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#-----------------------------------------------------------------------------
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# NotebookApp
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#-----------------------------------------------------------------------------
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class NotebookApp(BaseIPythonApplication):
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name = 'ipython-notebook'
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description = """
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The IPython HTML Notebook.
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This launches a Tornado based HTML Notebook Server that serves up an
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HTML5/Javascript Notebook client.
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"""
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examples = _examples
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classes = IPythonConsoleApp.classes + [MappingKernelManager, NotebookManager,
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FileNotebookManager, NotebookNotary]
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flags = Dict(flags)
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aliases = Dict(aliases)
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subcommands = dict(
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list=(NbserverListApp, NbserverListApp.description.splitlines()[0]),
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)
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kernel_argv = List(Unicode)
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def _log_level_default(self):
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return logging.INFO
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def _log_format_default(self):
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"""override default log format to include time"""
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return u"%(asctime)s.%(msecs).03d [%(name)s]%(highlevel)s %(message)s"
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# create requested profiles by default, if they don't exist:
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auto_create = Bool(True)
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# file to be opened in the notebook server
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file_to_run = Unicode('', config=True)
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def _file_to_run_changed(self, name, old, new):
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path, base = os.path.split(new)
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if path:
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self.file_to_run = base
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self.notebook_dir = path
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# Network related information.
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ip = Unicode('localhost', config=True,
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help="The IP address the notebook server will listen on."
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)
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def _ip_changed(self, name, old, new):
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if new == u'*': self.ip = u''
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port = Integer(8888, config=True,
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help="The port the notebook server will listen on."
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)
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port_retries = Integer(50, config=True,
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help="The number of additional ports to try if the specified port is not available."
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)
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certfile = Unicode(u'', config=True,
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help="""The full path to an SSL/TLS certificate file."""
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)
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keyfile = Unicode(u'', config=True,
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help="""The full path to a private key file for usage with SSL/TLS."""
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)
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cookie_secret = Bytes(b'', config=True,
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help="""The random bytes used to secure cookies.
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By default this is a new random number every time you start the Notebook.
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Set it to a value in a config file to enable logins to persist across server sessions.
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Note: Cookie secrets should be kept private, do not share config files with
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cookie_secret stored in plaintext (you can read the value from a file).
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"""
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)
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def _cookie_secret_default(self):
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return os.urandom(1024)
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password = Unicode(u'', config=True,
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help="""Hashed password to use for web authentication.
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To generate, type in a python/IPython shell:
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from IPython.lib import passwd; passwd()
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The string should be of the form type:salt:hashed-password.
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"""
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)
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open_browser = Bool(True, config=True,
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help="""Whether to open in a browser after starting.
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The specific browser used is platform dependent and
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determined by the python standard library `webbrowser`
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module, unless it is overridden using the --browser
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(NotebookApp.browser) configuration option.
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""")
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browser = Unicode(u'', config=True,
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help="""Specify what command to use to invoke a web
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browser when opening the notebook. If not specified, the
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default browser will be determined by the `webbrowser`
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standard library module, which allows setting of the
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BROWSER environment variable to override it.
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""")
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webapp_settings = Dict(config=True,
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help="Supply overrides for the tornado.web.Application that the "
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"IPython notebook uses.")
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jinja_environment_options = Dict(config=True,
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help="Supply extra arguments that will be passed to Jinja environment.")
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enable_mathjax = Bool(True, config=True,
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help="""Whether to enable MathJax for typesetting math/TeX
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MathJax is the javascript library IPython uses to render math/LaTeX. It is
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very large, so you may want to disable it if you have a slow internet
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connection, or for offline use of the notebook.
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When disabled, equations etc. will appear as their untransformed TeX source.
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"""
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)
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def _enable_mathjax_changed(self, name, old, new):
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"""set mathjax url to empty if mathjax is disabled"""
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if not new:
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self.mathjax_url = u''
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base_url = Unicode('/', config=True,
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help='''The base URL for the notebook server.
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Leading and trailing slashes can be omitted,
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|
|
and will automatically be added.
|
|
|
''')
|
|
|
def _base_url_changed(self, name, old, new):
|
|
|
if not new.startswith('/'):
|
|
|
self.base_url = '/'+new
|
|
|
elif not new.endswith('/'):
|
|
|
self.base_url = new+'/'
|
|
|
|
|
|
base_project_url = Unicode('/', config=True, help="""DEPRECATED use base_url""")
|
|
|
def _base_project_url_changed(self, name, old, new):
|
|
|
self.log.warn("base_project_url is deprecated, use base_url")
|
|
|
self.base_url = new
|
|
|
|
|
|
extra_static_paths = List(Unicode, config=True,
|
|
|
help="""Extra paths to search for serving static files.
|
|
|
|
|
|
This allows adding javascript/css to be available from the notebook server machine,
|
|
|
or overriding individual files in the IPython"""
|
|
|
)
|
|
|
def _extra_static_paths_default(self):
|
|
|
return [os.path.join(self.profile_dir.location, 'static')]
|
|
|
|
|
|
@property
|
|
|
def static_file_path(self):
|
|
|
"""return extra paths + the default location"""
|
|
|
return self.extra_static_paths + [DEFAULT_STATIC_FILES_PATH]
|
|
|
|
|
|
nbextensions_path = List(Unicode, config=True,
|
|
|
help="""paths for Javascript extensions. By default, this is just IPYTHONDIR/nbextensions"""
|
|
|
)
|
|
|
def _nbextensions_path_default(self):
|
|
|
return [os.path.join(get_ipython_dir(), 'nbextensions')]
|
|
|
|
|
|
mathjax_url = Unicode("", config=True,
|
|
|
help="""The url for MathJax.js."""
|
|
|
)
|
|
|
def _mathjax_url_default(self):
|
|
|
if not self.enable_mathjax:
|
|
|
return u''
|
|
|
static_url_prefix = self.webapp_settings.get("static_url_prefix",
|
|
|
url_path_join(self.base_url, "static")
|
|
|
)
|
|
|
|
|
|
# try local mathjax, either in nbextensions/mathjax or static/mathjax
|
|
|
for (url_prefix, search_path) in [
|
|
|
(url_path_join(self.base_url, "nbextensions"), self.nbextensions_path),
|
|
|
(static_url_prefix, self.static_file_path),
|
|
|
]:
|
|
|
self.log.debug("searching for local mathjax in %s", search_path)
|
|
|
try:
|
|
|
mathjax = filefind(os.path.join('mathjax', 'MathJax.js'), search_path)
|
|
|
except IOError:
|
|
|
continue
|
|
|
else:
|
|
|
url = url_path_join(url_prefix, u"mathjax/MathJax.js")
|
|
|
self.log.info("Serving local MathJax from %s at %s", mathjax, url)
|
|
|
return url
|
|
|
|
|
|
# no local mathjax, serve from CDN
|
|
|
if self.certfile:
|
|
|
# HTTPS: load from Rackspace CDN, because SSL certificate requires it
|
|
|
host = u"https://c328740.ssl.cf1.rackcdn.com"
|
|
|
else:
|
|
|
host = u"http://cdn.mathjax.org"
|
|
|
|
|
|
url = host + u"/mathjax/latest/MathJax.js"
|
|
|
self.log.info("Using MathJax from CDN: %s", url)
|
|
|
return url
|
|
|
|
|
|
def _mathjax_url_changed(self, name, old, new):
|
|
|
if new and not self.enable_mathjax:
|
|
|
# enable_mathjax=False overrides mathjax_url
|
|
|
self.mathjax_url = u''
|
|
|
else:
|
|
|
self.log.info("Using MathJax: %s", new)
|
|
|
|
|
|
notebook_manager_class = DottedObjectName('IPython.html.services.notebooks.filenbmanager.FileNotebookManager',
|
|
|
config=True,
|
|
|
help='The notebook manager class to use.')
|
|
|
|
|
|
trust_xheaders = Bool(False, config=True,
|
|
|
help=("Whether to trust or not X-Scheme/X-Forwarded-Proto and X-Real-Ip/X-Forwarded-For headers"
|
|
|
"sent by the upstream reverse proxy. Necessary if the proxy handles SSL")
|
|
|
)
|
|
|
|
|
|
info_file = Unicode()
|
|
|
|
|
|
def _info_file_default(self):
|
|
|
info_file = "nbserver-%s.json"%os.getpid()
|
|
|
return os.path.join(self.profile_dir.security_dir, info_file)
|
|
|
|
|
|
notebook_dir = Unicode(py3compat.getcwd(), config=True,
|
|
|
help="The directory to use for notebooks and kernels."
|
|
|
)
|
|
|
|
|
|
def _notebook_dir_changed(self, name, old, new):
|
|
|
"""Do a bit of validation of the notebook dir."""
|
|
|
if not os.path.isabs(new):
|
|
|
# If we receive a non-absolute path, make it absolute.
|
|
|
self.notebook_dir = os.path.abspath(new)
|
|
|
return
|
|
|
if not os.path.isdir(new):
|
|
|
raise TraitError("No such notebook dir: %r" % new)
|
|
|
|
|
|
# setting App.notebook_dir implies setting notebook and kernel dirs as well
|
|
|
self.config.FileNotebookManager.notebook_dir = new
|
|
|
self.config.MappingKernelManager.root_dir = new
|
|
|
|
|
|
|
|
|
def parse_command_line(self, argv=None):
|
|
|
super(NotebookApp, self).parse_command_line(argv)
|
|
|
|
|
|
if self.extra_args:
|
|
|
arg0 = self.extra_args[0]
|
|
|
f = os.path.abspath(arg0)
|
|
|
self.argv.remove(arg0)
|
|
|
if not os.path.exists(f):
|
|
|
self.log.critical("No such file or directory: %s", f)
|
|
|
self.exit(1)
|
|
|
|
|
|
# Use config here, to ensure that it takes higher priority than
|
|
|
# anything that comes from the profile.
|
|
|
c = Config()
|
|
|
if os.path.isdir(f):
|
|
|
c.NotebookApp.notebook_dir = f
|
|
|
elif os.path.isfile(f):
|
|
|
c.NotebookApp.file_to_run = f
|
|
|
self.update_config(c)
|
|
|
|
|
|
def init_kernel_argv(self):
|
|
|
"""construct the kernel arguments"""
|
|
|
# Scrub frontend-specific flags
|
|
|
self.kernel_argv = swallow_argv(self.argv, notebook_aliases, notebook_flags)
|
|
|
if any(arg.startswith(u'--pylab') for arg in self.kernel_argv):
|
|
|
self.log.warn('\n '.join([
|
|
|
"Starting all kernels in pylab mode is not recommended,",
|
|
|
"and will be disabled in a future release.",
|
|
|
"Please use the %matplotlib magic to enable matplotlib instead.",
|
|
|
"pylab implies many imports, which can have confusing side effects",
|
|
|
"and harm the reproducibility of your notebooks.",
|
|
|
]))
|
|
|
# Kernel should inherit default config file from frontend
|
|
|
self.kernel_argv.append("--IPKernelApp.parent_appname='%s'" % self.name)
|
|
|
# Kernel should get *absolute* path to profile directory
|
|
|
self.kernel_argv.extend(["--profile-dir", self.profile_dir.location])
|
|
|
|
|
|
def init_configurables(self):
|
|
|
# force Session default to be secure
|
|
|
default_secure(self.config)
|
|
|
self.kernel_manager = MappingKernelManager(
|
|
|
parent=self, log=self.log, kernel_argv=self.kernel_argv,
|
|
|
connection_dir = self.profile_dir.security_dir,
|
|
|
)
|
|
|
kls = import_item(self.notebook_manager_class)
|
|
|
self.notebook_manager = kls(parent=self, log=self.log)
|
|
|
self.session_manager = SessionManager(parent=self, log=self.log)
|
|
|
self.cluster_manager = ClusterManager(parent=self, log=self.log)
|
|
|
self.cluster_manager.update_profiles()
|
|
|
|
|
|
def init_logging(self):
|
|
|
# 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
|
|
|
|
|
|
# hook up tornado 3's loggers to our app handlers
|
|
|
for name in ('access', 'application', 'general'):
|
|
|
logger = logging.getLogger('tornado.%s' % name)
|
|
|
logger.parent = self.log
|
|
|
logger.setLevel(self.log.level)
|
|
|
|
|
|
def init_webapp(self):
|
|
|
"""initialize tornado webapp and httpserver"""
|
|
|
self.web_app = NotebookWebApplication(
|
|
|
self, self.kernel_manager, self.notebook_manager,
|
|
|
self.cluster_manager, self.session_manager,
|
|
|
self.log, self.base_url, self.webapp_settings,
|
|
|
self.jinja_environment_options
|
|
|
)
|
|
|
if self.certfile:
|
|
|
ssl_options = dict(certfile=self.certfile)
|
|
|
if self.keyfile:
|
|
|
ssl_options['keyfile'] = self.keyfile
|
|
|
else:
|
|
|
ssl_options = None
|
|
|
self.web_app.password = self.password
|
|
|
self.http_server = httpserver.HTTPServer(self.web_app, ssl_options=ssl_options,
|
|
|
xheaders=self.trust_xheaders)
|
|
|
if not self.ip:
|
|
|
warning = "WARNING: The notebook server is listening on all IP addresses"
|
|
|
if ssl_options is None:
|
|
|
self.log.critical(warning + " and not using encryption. This "
|
|
|
"is not recommended.")
|
|
|
if not self.password:
|
|
|
self.log.critical(warning + " and not using authentication. "
|
|
|
"This is highly insecure and not recommended.")
|
|
|
success = None
|
|
|
for port in random_ports(self.port, self.port_retries+1):
|
|
|
try:
|
|
|
self.http_server.listen(port, self.ip)
|
|
|
except socket.error as e:
|
|
|
if e.errno == errno.EADDRINUSE:
|
|
|
self.log.info('The port %i is already in use, trying another random port.' % port)
|
|
|
continue
|
|
|
elif e.errno in (errno.EACCES, getattr(errno, 'WSAEACCES', errno.EACCES)):
|
|
|
self.log.warn("Permission to listen on port %i denied" % port)
|
|
|
continue
|
|
|
else:
|
|
|
raise
|
|
|
else:
|
|
|
self.port = port
|
|
|
success = True
|
|
|
break
|
|
|
if not success:
|
|
|
self.log.critical('ERROR: the notebook server could not be started because '
|
|
|
'no available port could be found.')
|
|
|
self.exit(1)
|
|
|
|
|
|
@property
|
|
|
def display_url(self):
|
|
|
ip = self.ip if self.ip else '[all ip addresses on your system]'
|
|
|
return self._url(ip)
|
|
|
|
|
|
@property
|
|
|
def connection_url(self):
|
|
|
ip = self.ip if self.ip else 'localhost'
|
|
|
return self._url(ip)
|
|
|
|
|
|
def _url(self, ip):
|
|
|
proto = 'https' if self.certfile else 'http'
|
|
|
return "%s://%s:%i%s" % (proto, ip, self.port, self.base_url)
|
|
|
|
|
|
def init_signal(self):
|
|
|
if not sys.platform.startswith('win'):
|
|
|
signal.signal(signal.SIGINT, self._handle_sigint)
|
|
|
signal.signal(signal.SIGTERM, self._signal_stop)
|
|
|
if hasattr(signal, 'SIGUSR1'):
|
|
|
# Windows doesn't support SIGUSR1
|
|
|
signal.signal(signal.SIGUSR1, self._signal_info)
|
|
|
if hasattr(signal, 'SIGINFO'):
|
|
|
# only on BSD-based systems
|
|
|
signal.signal(signal.SIGINFO, self._signal_info)
|
|
|
|
|
|
def _handle_sigint(self, sig, frame):
|
|
|
"""SIGINT handler spawns confirmation dialog"""
|
|
|
# register more forceful signal handler for ^C^C case
|
|
|
signal.signal(signal.SIGINT, self._signal_stop)
|
|
|
# request confirmation dialog in bg thread, to avoid
|
|
|
# blocking the App
|
|
|
thread = threading.Thread(target=self._confirm_exit)
|
|
|
thread.daemon = True
|
|
|
thread.start()
|
|
|
|
|
|
def _restore_sigint_handler(self):
|
|
|
"""callback for restoring original SIGINT handler"""
|
|
|
signal.signal(signal.SIGINT, self._handle_sigint)
|
|
|
|
|
|
def _confirm_exit(self):
|
|
|
"""confirm shutdown on ^C
|
|
|
|
|
|
A second ^C, or answering 'y' within 5s will cause shutdown,
|
|
|
otherwise original SIGINT handler will be restored.
|
|
|
|
|
|
This doesn't work on Windows.
|
|
|
"""
|
|
|
# FIXME: remove this delay when pyzmq dependency is >= 2.1.11
|
|
|
time.sleep(0.1)
|
|
|
info = self.log.info
|
|
|
info('interrupted')
|
|
|
print(self.notebook_info())
|
|
|
sys.stdout.write("Shutdown this notebook server (y/[n])? ")
|
|
|
sys.stdout.flush()
|
|
|
r,w,x = select.select([sys.stdin], [], [], 5)
|
|
|
if r:
|
|
|
line = sys.stdin.readline()
|
|
|
if line.lower().startswith('y') and 'n' not in line.lower():
|
|
|
self.log.critical("Shutdown confirmed")
|
|
|
ioloop.IOLoop.instance().stop()
|
|
|
return
|
|
|
else:
|
|
|
print("No answer for 5s:", end=' ')
|
|
|
print("resuming operation...")
|
|
|
# no answer, or answer is no:
|
|
|
# set it back to original SIGINT handler
|
|
|
# use IOLoop.add_callback because signal.signal must be called
|
|
|
# from main thread
|
|
|
ioloop.IOLoop.instance().add_callback(self._restore_sigint_handler)
|
|
|
|
|
|
def _signal_stop(self, sig, frame):
|
|
|
self.log.critical("received signal %s, stopping", sig)
|
|
|
ioloop.IOLoop.instance().stop()
|
|
|
|
|
|
def _signal_info(self, sig, frame):
|
|
|
print(self.notebook_info())
|
|
|
|
|
|
def init_components(self):
|
|
|
"""Check the components submodule, and warn if it's unclean"""
|
|
|
status = submodule.check_submodule_status()
|
|
|
if status == 'missing':
|
|
|
self.log.warn("components submodule missing, running `git submodule update`")
|
|
|
submodule.update_submodules(submodule.ipython_parent())
|
|
|
elif status == 'unclean':
|
|
|
self.log.warn("components submodule unclean, you may see 404s on static/components")
|
|
|
self.log.warn("run `setup.py submodule` or `git submodule update` to update")
|
|
|
|
|
|
@catch_config_error
|
|
|
def initialize(self, argv=None):
|
|
|
super(NotebookApp, self).initialize(argv)
|
|
|
self.init_logging()
|
|
|
self.init_kernel_argv()
|
|
|
self.init_configurables()
|
|
|
self.init_components()
|
|
|
self.init_webapp()
|
|
|
self.init_signal()
|
|
|
|
|
|
def cleanup_kernels(self):
|
|
|
"""Shutdown all kernels.
|
|
|
|
|
|
The kernels will shutdown themselves when this process no longer exists,
|
|
|
but explicit shutdown allows the KernelManagers to cleanup the connection files.
|
|
|
"""
|
|
|
self.log.info('Shutting down kernels')
|
|
|
self.kernel_manager.shutdown_all()
|
|
|
|
|
|
def notebook_info(self):
|
|
|
"Return the current working directory and the server url information"
|
|
|
info = self.notebook_manager.info_string() + "\n"
|
|
|
info += "%d active kernels \n" % len(self.kernel_manager._kernels)
|
|
|
return info + "The IPython Notebook is running at: %s" % self.display_url
|
|
|
|
|
|
def server_info(self):
|
|
|
"""Return a JSONable dict of information about this server."""
|
|
|
return {'url': self.connection_url,
|
|
|
'hostname': self.ip if self.ip else 'localhost',
|
|
|
'port': self.port,
|
|
|
'secure': bool(self.certfile),
|
|
|
'base_url': self.base_url,
|
|
|
'notebook_dir': os.path.abspath(self.notebook_dir),
|
|
|
}
|
|
|
|
|
|
def write_server_info_file(self):
|
|
|
"""Write the result of server_info() to the JSON file info_file."""
|
|
|
with open(self.info_file, 'w') as f:
|
|
|
json.dump(self.server_info(), f, indent=2)
|
|
|
|
|
|
def remove_server_info_file(self):
|
|
|
"""Remove the nbserver-<pid>.json file created for this server.
|
|
|
|
|
|
Ignores the error raised when the file has already been removed.
|
|
|
"""
|
|
|
try:
|
|
|
os.unlink(self.info_file)
|
|
|
except OSError as e:
|
|
|
if e.errno != errno.ENOENT:
|
|
|
raise
|
|
|
|
|
|
def start(self):
|
|
|
""" Start the IPython Notebook server app, after initialization
|
|
|
|
|
|
This method takes no arguments so all configuration and initialization
|
|
|
must be done prior to calling this method."""
|
|
|
if self.subapp is not None:
|
|
|
return self.subapp.start()
|
|
|
|
|
|
info = self.log.info
|
|
|
for line in self.notebook_info().split("\n"):
|
|
|
info(line)
|
|
|
info("Use Control-C to stop this server and shut down all kernels (twice to skip confirmation).")
|
|
|
|
|
|
self.write_server_info_file()
|
|
|
|
|
|
if self.open_browser or self.file_to_run:
|
|
|
try:
|
|
|
browser = webbrowser.get(self.browser or None)
|
|
|
except webbrowser.Error as e:
|
|
|
self.log.warn('No web browser found: %s.' % e)
|
|
|
browser = None
|
|
|
|
|
|
if self.file_to_run:
|
|
|
fullpath = os.path.join(self.notebook_dir, self.file_to_run)
|
|
|
if not os.path.exists(fullpath):
|
|
|
self.log.critical("%s does not exist" % fullpath)
|
|
|
self.exit(1)
|
|
|
|
|
|
uri = url_path_join('notebooks', self.file_to_run)
|
|
|
else:
|
|
|
uri = 'tree'
|
|
|
if browser:
|
|
|
b = lambda : browser.open(url_path_join(self.connection_url, uri),
|
|
|
new=2)
|
|
|
threading.Thread(target=b).start()
|
|
|
try:
|
|
|
ioloop.IOLoop.instance().start()
|
|
|
except KeyboardInterrupt:
|
|
|
info("Interrupted...")
|
|
|
finally:
|
|
|
self.cleanup_kernels()
|
|
|
self.remove_server_info_file()
|
|
|
|
|
|
|
|
|
def list_running_servers(profile='default'):
|
|
|
"""Iterate over the server info files of running notebook servers.
|
|
|
|
|
|
Given a profile name, find nbserver-* files in the security directory of
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that profile, and yield dicts of their information, each one pertaining to
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a currently running notebook server instance.
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"""
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pd = ProfileDir.find_profile_dir_by_name(get_ipython_dir(), name=profile)
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for file in os.listdir(pd.security_dir):
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if file.startswith('nbserver-'):
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with io.open(os.path.join(pd.security_dir, file), encoding='utf-8') as f:
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yield json.load(f)
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#-----------------------------------------------------------------------------
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# Main entry point
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#-----------------------------------------------------------------------------
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launch_new_instance = NotebookApp.launch_instance
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