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"""A tornado based IPython notebook server."""
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#-----------------------------------------------------------------------------
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# Copyright (C) 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.txt, 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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import logging
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import os
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import signal
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import sys
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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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import tornado.ioloop
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tornado.ioloop = ioloop
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from tornado import httpserver
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from tornado import web
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from .kernelmanager import KernelManager, RoutingKernelManager
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from .sessionmanager import SessionManager
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from .handlers import (
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NBBrowserHandler, NewHandler, NamedNotebookHandler,
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MainKernelHandler, KernelHandler, KernelActionHandler, ZMQStreamHandler,
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NotebookRootHandler, NotebookHandler, RSTHandler
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)
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from .notebookmanager import NotebookManager
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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.frontend.qt.console.rich_ipython_widget import RichIPythonWidget
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from IPython.zmq.session import Session
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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, Int, Any, List, Enum
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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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#-----------------------------------------------------------------------------
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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, routing_kernel_manager, notebook_manager, log):
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handlers = [
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(r"/", NBBrowserHandler),
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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, ZMQStreamHandler, dict(stream_name='iopub')),
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(r"/kernels/%s/shell" % _kernel_id_regex, ZMQStreamHandler, dict(stream_name='shell')),
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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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)
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web.Application.__init__(self, handlers, **settings)
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self.routing_kernel_manager = routing_kernel_manager
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self.log = log
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self.notebook_manager = notebook_manager
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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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# 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 = []
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aliases = dict(ipkernel_aliases)
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aliases.update(dict(
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ip = 'IPythonNotebookApp.ip',
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port = 'IPythonNotebookApp.port',
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colors = 'ZMQInteractiveShell.colors',
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))
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#-----------------------------------------------------------------------------
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# IPythonNotebookApp
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#-----------------------------------------------------------------------------
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class IPythonNotebookApp(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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classes = [IPKernelApp, ZMQInteractiveShell, ProfileDir, Session,
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RoutingKernelManager, NotebookManager,
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KernelManager, SessionManager]
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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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# connection info:
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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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port = Int(8888, config=True,
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help="The port the notebook server will listen on."
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)
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# the factory for creating a widget
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widget_factory = Any(RichIPythonWidget)
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def parse_command_line(self, argv=None):
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super(IPythonNotebookApp, 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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self.kernel_argv = list(argv) # copy
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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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# scrub frontend-specific flags
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for a in argv:
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if a.startswith('-') and a.lstrip('-') in notebook_flags:
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self.kernel_argv.remove(a)
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def init_configurables(self):
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# Don't let Qt or ZMQ swallow KeyboardInterupts.
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signal.signal(signal.SIGINT, signal.SIG_DFL)
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# Create a KernelManager and start a kernel.
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self.kernel_manager = KernelManager(config=self.config, log=self.log)
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self.routing_kernel_manager = RoutingKernelManager(config=self.config, log=self.log,
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kernel_manager=self.kernel_manager, kernel_argv=self.kernel_argv
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)
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self.notebook_manager = NotebookManager(config=self.config, log=self.log)
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def init_logging(self):
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super(IPythonNotebookApp, 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 initialize(self, argv=None):
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super(IPythonNotebookApp, self).initialize(argv)
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self.init_configurables()
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self.web_app = NotebookWebApplication(
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self.routing_kernel_manager, self.notebook_manager, self.log
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)
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self.http_server = httpserver.HTTPServer(self.web_app)
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self.http_server.listen(self.port)
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def start(self):
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self.log.info("The IPython Notebook is running at: http://%s:%i" % (self.ip, self.port))
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ioloop.IOLoop.instance().start()
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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 = IPythonNotebookApp()
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app.initialize()
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app.start()
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