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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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#-----------------------------------------------------------------------------
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# Copyright (C) 2008-2011 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 logging
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import os
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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 webbrowser
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# Third party
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import zmq
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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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# FIXME: ioloop.install is new in pyzmq-2.1.7, so remove this conditional
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# when pyzmq dependency is updated beyond that.
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if hasattr(ioloop, 'install'):
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ioloop.install()
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else:
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import tornado.ioloop
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tornado.ioloop.IOLoop = ioloop.IOLoop
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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 .kernelmanager import MappingKernelManager
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from .handlers import (LoginHandler, LogoutHandler,
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ProjectDashboardHandler, NewHandler, NamedNotebookHandler,
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MainKernelHandler, KernelHandler, KernelActionHandler, IOPubHandler,
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ShellHandler, NotebookRootHandler, NotebookHandler, RSTHandler
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)
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from .notebookmanager import NotebookManager
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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.lib.kernel import swallow_argv
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from IPython.zmq.session import Session, default_secure
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from IPython.zmq.zmqshell import ZMQInteractiveShell
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from IPython.zmq.ipkernel import (
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flags as ipkernel_flags,
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aliases as ipkernel_aliases,
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IPKernelApp
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)
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from IPython.utils.traitlets import Dict, Unicode, Integer, List, Enum, Bool
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#-----------------------------------------------------------------------------
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# Module globals
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#-----------------------------------------------------------------------------
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_kernel_id_regex = r"(?P<kernel_id>\w+-\w+-\w+-\w+-\w+)"
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_kernel_action_regex = r"(?P<action>restart|interrupt)"
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_notebook_id_regex = r"(?P<notebook_id>\w+-\w+-\w+-\w+-\w+)"
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LOCALHOST = '127.0.0.1'
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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 --pylab=inline # pylab in inline plotting mode
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ipython notebook --certfile=mycert.pem # use SSL/TLS certificate
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ipython notebook --port=5555 --ip=* # Listen on port 5555, all interfaces
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"""
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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, log, settings_overrides):
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handlers = [
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(r"/", ProjectDashboardHandler),
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(r"/login", LoginHandler),
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(r"/logout", LogoutHandler),
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(r"/new", NewHandler),
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(r"/%s" % _notebook_id_regex, NamedNotebookHandler),
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(r"/kernels", MainKernelHandler),
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(r"/kernels/%s" % _kernel_id_regex, KernelHandler),
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(r"/kernels/%s/%s" % (_kernel_id_regex, _kernel_action_regex), KernelActionHandler),
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(r"/kernels/%s/iopub" % _kernel_id_regex, IOPubHandler),
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(r"/kernels/%s/shell" % _kernel_id_regex, ShellHandler),
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(r"/notebooks", NotebookRootHandler),
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(r"/notebooks/%s" % _notebook_id_regex, NotebookHandler),
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(r"/rstservice/render", RSTHandler)
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]
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settings = dict(
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template_path=os.path.join(os.path.dirname(__file__), "templates"),
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static_path=os.path.join(os.path.dirname(__file__), "static"),
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cookie_secret=os.urandom(1024),
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login_url="/login",
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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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super(NotebookWebApplication, self).__init__(handlers, **settings)
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self.kernel_manager = kernel_manager
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self.log = log
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self.notebook_manager = notebook_manager
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self.ipython_app = ipython_app
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self.read_only = self.ipython_app.read_only
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#-----------------------------------------------------------------------------
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# Aliases and Flags
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#-----------------------------------------------------------------------------
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flags = dict(ipkernel_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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flags['read-only'] = (
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{'NotebookApp' : {'read_only' : True}},
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"""Allow read-only access to notebooks.
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When using a password to protect the notebook server, this flag
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allows unauthenticated clients to view the notebook list, and
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individual notebooks, but not edit them, start kernels, or run
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code.
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If no password is set, the server will be entirely read-only.
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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', 'NotebookManager.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', 'read-only', 'script', 'no-script']
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aliases = dict(ipkernel_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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'keyfile': 'NotebookApp.keyfile',
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'certfile': 'NotebookApp.certfile',
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'notebook-dir': 'NotebookManager.notebook_dir',
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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'ip', u'keyfile', u'certfile',
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u'notebook-dir']
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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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default_config_file_name='ipython_notebook_config.py'
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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 = [IPKernelApp, ZMQInteractiveShell, ProfileDir, Session,
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MappingKernelManager, NotebookManager]
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flags = Dict(flags)
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aliases = Dict(aliases)
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kernel_argv = List(Unicode)
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log_level = Enum((0,10,20,30,40,50,'DEBUG','INFO','WARN','ERROR','CRITICAL'),
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default_value=logging.INFO,
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config=True,
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help="Set the log level by value or name.")
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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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# 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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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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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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read_only = Bool(False, config=True,
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help="Whether to prevent editing/execution of notebooks."
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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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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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mathjax_url = Unicode("", config=True,
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help="""The url for MathJax.js."""
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)
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def _mathjax_url_default(self):
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if not self.enable_mathjax:
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return u''
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static_path = self.webapp_settings.get("static_path", os.path.join(os.path.dirname(__file__), "static"))
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if os.path.exists(os.path.join(static_path, 'mathjax', "MathJax.js")):
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self.log.info("Using local MathJax")
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return u"static/mathjax/MathJax.js"
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else:
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self.log.info("Using MathJax from CDN")
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return u"http://cdn.mathjax.org/mathjax/latest/MathJax.js"
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def _mathjax_url_changed(self, name, old, new):
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if new and not self.enable_mathjax:
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# enable_mathjax=False overrides mathjax_url
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self.mathjax_url = u''
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else:
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self.log.info("Using MathJax: %s", new)
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def parse_command_line(self, argv=None):
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super(NotebookApp, self).parse_command_line(argv)
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if argv is None:
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argv = sys.argv[1:]
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# Scrub frontend-specific flags
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self.kernel_argv = swallow_argv(argv, notebook_aliases, notebook_flags)
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# Kernel should inherit default config file from frontend
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self.kernel_argv.append("--KernelApp.parent_appname='%s'"%self.name)
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def init_configurables(self):
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# force Session default to be secure
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default_secure(self.config)
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# Create a KernelManager and start a kernel.
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self.kernel_manager = MappingKernelManager(
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config=self.config, log=self.log, kernel_argv=self.kernel_argv,
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connection_dir = self.profile_dir.security_dir,
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)
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self.notebook_manager = NotebookManager(config=self.config, log=self.log)
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self.notebook_manager.list_notebooks()
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def init_logging(self):
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super(NotebookApp, self).init_logging()
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# This prevents double log messages because tornado use a root logger that
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# self.log is a child of. The logging module dipatches log messages to a log
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# and all of its ancenstors until propagate is set to False.
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self.log.propagate = False
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def init_webapp(self):
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"""initialize tornado webapp and httpserver"""
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self.web_app = NotebookWebApplication(
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self, self.kernel_manager, self.notebook_manager, self.log,
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self.webapp_settings
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)
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if self.certfile:
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ssl_options = dict(certfile=self.certfile)
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if self.keyfile:
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ssl_options['keyfile'] = self.keyfile
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else:
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ssl_options = None
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self.web_app.password = self.password
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self.http_server = httpserver.HTTPServer(self.web_app, ssl_options=ssl_options)
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if ssl_options is None and not self.ip and not (self.read_only and not self.password):
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self.log.critical('WARNING: the notebook server is listening on all IP addresses '
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'but not using any encryption or authentication. This is highly '
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'insecure and not recommended.')
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# Try random ports centered around the default.
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from random import randint
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n = 50 # Max number of attempts, keep reasonably large.
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for port in range(self.port, self.port+5) + [self.port + randint(-2*n, 2*n) for i in range(n-5)]:
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try:
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self.http_server.listen(port, self.ip)
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except socket.error, e:
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if e.errno != errno.EADDRINUSE:
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raise
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self.log.info('The port %i is already in use, trying another random port.' % port)
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else:
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self.port = port
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break
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@catch_config_error
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def initialize(self, argv=None):
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super(NotebookApp, self).initialize(argv)
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self.init_configurables()
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self.init_webapp()
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def cleanup_kernels(self):
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"""shutdown all kernels
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The kernels will shutdown themselves when this process no longer exists,
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but explicit shutdown allows the KernelManagers to cleanup the connection files.
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"""
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self.log.info('Shutting down kernels')
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km = self.kernel_manager
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# copy list, since kill_kernel deletes keys
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for kid in list(km.kernel_ids):
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km.kill_kernel(kid)
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def start(self):
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ip = self.ip if self.ip else '[all ip addresses on your system]'
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proto = 'https' if self.certfile else 'http'
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info = self.log.info
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info("The IPython Notebook is running at: %s://%s:%i" %
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(proto, ip, self.port) )
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info("Use Control-C to stop this server and shut down all kernels.")
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if self.open_browser:
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ip = self.ip or '127.0.0.1'
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b = lambda : webbrowser.open("%s://%s:%i" % (proto, ip, self.port),
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new=2)
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threading.Thread(target=b).start()
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try:
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ioloop.IOLoop.instance().start()
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except KeyboardInterrupt:
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info("Interrupted...")
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finally:
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self.cleanup_kernels()
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#-----------------------------------------------------------------------------
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# Main entry point
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#-----------------------------------------------------------------------------
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def launch_new_instance():
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app = NotebookApp.instance()
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app.initialize()
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app.start()
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