restore websocket_url configurable

allows ws to be handled via separate proxies,
as appears to be the case on OpenShift and some other hosting services.

IPython/html/base/handlers.py

@@ -1,422 +1,427
 """Base Tornado handlers for the notebook."""
 
 # Copyright (c) IPython Development Team.
 # Distributed under the terms of the Modified BSD License.
 
 import functools
 import json
 import logging
 import os
 import re
 import sys
 import traceback
 try:
     # py3
     from http.client import responses
 except ImportError:
     from httplib import responses
 
 from jinja2 import TemplateNotFound
 from tornado import web
 
 try:
     from tornado.log import app_log
 except ImportError:
     app_log = logging.getLogger()
 
 from IPython.config import Application
 from IPython.utils.path import filefind
 from IPython.utils.py3compat import string_types
 from IPython.html.utils import is_hidden
 
 #-----------------------------------------------------------------------------
 # Top-level handlers
 #-----------------------------------------------------------------------------
 non_alphanum = re.compile(r'[^A-Za-z0-9]')
 
 class AuthenticatedHandler(web.RequestHandler):
     """A RequestHandler with an authenticated user."""
 
     def set_default_headers(self):
         headers = self.settings.get('headers', {})
 
         if "X-Frame-Options" not in headers:
             headers["X-Frame-Options"] = "SAMEORIGIN"
 
         for header_name,value in headers.items() :
             try:
                 self.set_header(header_name, value)
             except Exception:
                 # tornado raise Exception (not a subclass)
                 # if method is unsupported (websocket and Access-Control-Allow-Origin
                 # for example, so just ignore)
                 pass
     
     def clear_login_cookie(self):
         self.clear_cookie(self.cookie_name)
     
     def get_current_user(self):
         user_id = self.get_secure_cookie(self.cookie_name)
         # For now the user_id should not return empty, but it could eventually
         if user_id == '':
             user_id = 'anonymous'
         if user_id is None:
             # prevent extra Invalid cookie sig warnings:
             self.clear_login_cookie()
             if not self.login_available:
                 user_id = 'anonymous'
         return user_id
 
     @property
     def cookie_name(self):
         default_cookie_name = non_alphanum.sub('-', 'username-{}'.format(
             self.request.host
         ))
         return self.settings.get('cookie_name', default_cookie_name)
     
     @property
     def password(self):
         """our password"""
         return self.settings.get('password', '')
     
     @property
     def logged_in(self):
         """Is a user currently logged in?
 
         """
         user = self.get_current_user()
         return (user and not user == 'anonymous')
 
     @property
     def login_available(self):
         """May a user proceed to log in?
 
         This returns True if login capability is available, irrespective of
         whether the user is already logged in or not.
 
         """
         return bool(self.settings.get('password', ''))
 
 
 class IPythonHandler(AuthenticatedHandler):
     """IPython-specific extensions to authenticated handling
     
     Mostly property shortcuts to IPython-specific settings.
     """
     
     @property
     def config(self):
         return self.settings.get('config', None)
     
     @property
     def log(self):
         """use the IPython log by default, falling back on tornado's logger"""
         if Application.initialized():
             return Application.instance().log
         else:
             return app_log
     
     #---------------------------------------------------------------
     # URLs
     #---------------------------------------------------------------
     
     @property
     def mathjax_url(self):
         return self.settings.get('mathjax_url', '')
     
     @property
     def base_url(self):
         return self.settings.get('base_url', '/')
     
+    @property
+    def ws_url(self):
+        return self.settings.get('websocket_url', '')
+    
     #---------------------------------------------------------------
     # Manager objects
     #---------------------------------------------------------------
     
     @property
     def kernel_manager(self):
         return self.settings['kernel_manager']
 
     @property
     def notebook_manager(self):
         return self.settings['notebook_manager']
     
     @property
     def cluster_manager(self):
         return self.settings['cluster_manager']
     
     @property
     def session_manager(self):
         return self.settings['session_manager']
     
     @property
     def kernel_spec_manager(self):
         return self.settings['kernel_spec_manager']
 
     @property
     def project_dir(self):
         return self.notebook_manager.notebook_dir
     
     #---------------------------------------------------------------
     # CORS
     #---------------------------------------------------------------
     
     @property
     def allow_origin(self):
         """Normal Access-Control-Allow-Origin"""
         return self.settings.get('allow_origin', '')
     
     @property
     def allow_origin_pat(self):
         """Regular expression version of allow_origin"""
         return self.settings.get('allow_origin_pat', None)
     
     @property
     def allow_credentials(self):
         """Whether to set Access-Control-Allow-Credentials"""
         return self.settings.get('allow_credentials', False)
     
     def set_default_headers(self):
         """Add CORS headers, if defined"""
         super(IPythonHandler, self).set_default_headers()
         if self.allow_origin:
             self.set_header("Access-Control-Allow-Origin", self.allow_origin)
         elif self.allow_origin_pat:
             origin = self.get_origin()
             if origin and self.allow_origin_pat.match(origin):
                 self.set_header("Access-Control-Allow-Origin", origin)
         if self.allow_credentials:
             self.set_header("Access-Control-Allow-Credentials", 'true')
     
     def get_origin(self):
         # Handle WebSocket Origin naming convention differences
         # The difference between version 8 and 13 is that in 8 the
         # client sends a "Sec-Websocket-Origin" header and in 13 it's
         # simply "Origin".
         if "Origin" in self.request.headers:
             origin = self.request.headers.get("Origin")
         else:
             origin = self.request.headers.get("Sec-Websocket-Origin", None)
         return origin
     
     #---------------------------------------------------------------
     # template rendering
     #---------------------------------------------------------------
     
     def get_template(self, name):
         """Return the jinja template object for a given name"""
         return self.settings['jinja2_env'].get_template(name)
     
     def render_template(self, name, **ns):
         ns.update(self.template_namespace)
         template = self.get_template(name)
         return template.render(**ns)
     
     @property
     def template_namespace(self):
         return dict(
             base_url=self.base_url,
+            ws_url=self.ws_url,
             logged_in=self.logged_in,
             login_available=self.login_available,
             static_url=self.static_url,
         )
     
     def get_json_body(self):
         """Return the body of the request as JSON data."""
         if not self.request.body:
             return None
         # Do we need to call body.decode('utf-8') here?
         body = self.request.body.strip().decode(u'utf-8')
         try:
             model = json.loads(body)
         except Exception:
             self.log.debug("Bad JSON: %r", body)
             self.log.error("Couldn't parse JSON", exc_info=True)
             raise web.HTTPError(400, u'Invalid JSON in body of request')
         return model
 
     def get_error_html(self, status_code, **kwargs):
         """render custom error pages"""
         exception = kwargs.get('exception')
         message = ''
         status_message = responses.get(status_code, 'Unknown HTTP Error')
         if exception:
             # get the custom message, if defined
             try:
                 message = exception.log_message % exception.args
             except Exception:
                 pass
             
             # construct the custom reason, if defined
             reason = getattr(exception, 'reason', '')
             if reason:
                 status_message = reason
         
         # build template namespace
         ns = dict(
             status_code=status_code,
             status_message=status_message,
             message=message,
             exception=exception,
         )
         
         # render the template
         try:
             html = self.render_template('%s.html' % status_code, **ns)
         except TemplateNotFound:
             self.log.debug("No template for %d", status_code)
             html = self.render_template('error.html', **ns)
         return html
 
 
 class Template404(IPythonHandler):
     """Render our 404 template"""
     def prepare(self):
         raise web.HTTPError(404)
 
 
 class AuthenticatedFileHandler(IPythonHandler, web.StaticFileHandler):
     """static files should only be accessible when logged in"""
 
     @web.authenticated
     def get(self, path):
         if os.path.splitext(path)[1] == '.ipynb':
             name = os.path.basename(path)
             self.set_header('Content-Type', 'application/json')
             self.set_header('Content-Disposition','attachment; filename="%s"' % name)
         
         return web.StaticFileHandler.get(self, path)
     
     def compute_etag(self):
         return None
     
     def validate_absolute_path(self, root, absolute_path):
         """Validate and return the absolute path.
         
         Requires tornado 3.1
         
         Adding to tornado's own handling, forbids the serving of hidden files.
         """
         abs_path = super(AuthenticatedFileHandler, self).validate_absolute_path(root, absolute_path)
         abs_root = os.path.abspath(root)
         if is_hidden(abs_path, abs_root):
             self.log.info("Refusing to serve hidden file, via 404 Error")
             raise web.HTTPError(404)
         return abs_path
 
 
 def json_errors(method):
     """Decorate methods with this to return GitHub style JSON errors.
     
     This should be used on any JSON API on any handler method that can raise HTTPErrors.
     
     This will grab the latest HTTPError exception using sys.exc_info
     and then:
     
     1. Set the HTTP status code based on the HTTPError
     2. Create and return a JSON body with a message field describing
        the error in a human readable form.
     """
     @functools.wraps(method)
     def wrapper(self, *args, **kwargs):
         try:
             result = method(self, *args, **kwargs)
         except web.HTTPError as e:
             status = e.status_code
             message = e.log_message
             self.log.warn(message)
             self.set_status(e.status_code)
             self.finish(json.dumps(dict(message=message)))
         except Exception:
             self.log.error("Unhandled error in API request", exc_info=True)
             status = 500
             message = "Unknown server error"
             t, value, tb = sys.exc_info()
             self.set_status(status)
             tb_text = ''.join(traceback.format_exception(t, value, tb))
             reply = dict(message=message, traceback=tb_text)
             self.finish(json.dumps(reply))
         else:
             return result
     return wrapper
 
 
 
 #-----------------------------------------------------------------------------
 # File handler
 #-----------------------------------------------------------------------------
 
 # to minimize subclass changes:
 HTTPError = web.HTTPError
 
 class FileFindHandler(web.StaticFileHandler):
     """subclass of StaticFileHandler for serving files from a search path"""
     
     # cache search results, don't search for files more than once
     _static_paths = {}
     
     def initialize(self, path, default_filename=None):
         if isinstance(path, string_types):
             path = [path]
         
         self.root = tuple(
             os.path.abspath(os.path.expanduser(p)) + os.sep for p in path
         )
         self.default_filename = default_filename
     
     def compute_etag(self):
         return None
     
     @classmethod
     def get_absolute_path(cls, roots, path):
         """locate a file to serve on our static file search path"""
         with cls._lock:
             if path in cls._static_paths:
                 return cls._static_paths[path]
             try:
                 abspath = os.path.abspath(filefind(path, roots))
             except IOError:
                 # IOError means not found
                 return ''
             
             cls._static_paths[path] = abspath
             return abspath
     
     def validate_absolute_path(self, root, absolute_path):
         """check if the file should be served (raises 404, 403, etc.)"""
         if absolute_path == '':
             raise web.HTTPError(404)
         
         for root in self.root:
             if (absolute_path + os.sep).startswith(root):
                 break
         
         return super(FileFindHandler, self).validate_absolute_path(root, absolute_path)
 
 
 class TrailingSlashHandler(web.RequestHandler):
     """Simple redirect handler that strips trailing slashes
     
     This should be the first, highest priority handler.
     """
     
     SUPPORTED_METHODS = ['GET']
     
     def get(self):
         self.redirect(self.request.uri.rstrip('/'))
 
 #-----------------------------------------------------------------------------
 # URL pattern fragments for re-use
 #-----------------------------------------------------------------------------
 
 path_regex = r"(?P<path>(?:/.*)*)"
 notebook_name_regex = r"(?P<name>[^/]+\.ipynb)"
 notebook_path_regex = "%s/%s" % (path_regex, notebook_name_regex)
 
 #-----------------------------------------------------------------------------
 # URL to handler mappings
 #-----------------------------------------------------------------------------
 
 
 default_handlers = [
     (r".*/", TrailingSlashHandler)
 ]

IPython/html/notebookapp.py

@@ -1,935 +1,943
 # coding: utf-8
 """A tornado based IPython notebook server."""
 
 # Copyright (c) IPython Development Team.
 # Distributed under the terms of the Modified BSD License.
 
 from __future__ import print_function
 
 import base64
 import errno
 import io
 import json
 import logging
 import os
 import random
 import re
 import select
 import signal
 import socket
 import sys
 import threading
 import time
 import webbrowser
 
 
 # check for pyzmq 2.1.11
 from IPython.utils.zmqrelated import check_for_zmq
 check_for_zmq('2.1.11', 'IPython.html')
 
 from jinja2 import Environment, FileSystemLoader
 
 # Install the pyzmq ioloop. This has to be done before anything else from
 # tornado is imported.
 from zmq.eventloop import ioloop
 ioloop.install()
 
 # check for tornado 3.1.0
 msg = "The IPython Notebook requires tornado >= 3.1.0"
 try:
     import tornado
 except ImportError:
     raise ImportError(msg)
 try:
     version_info = tornado.version_info
 except AttributeError:
     raise ImportError(msg + ", but you have < 1.1.0")
 if version_info < (3,1,0):
     raise ImportError(msg + ", but you have %s" % tornado.version)
 
 from tornado import httpserver
 from tornado import web
 from tornado.log import LogFormatter
 
 from IPython.html import DEFAULT_STATIC_FILES_PATH
 from .base.handlers import Template404
 from .log import log_request
 from .services.kernels.kernelmanager import MappingKernelManager
 from .services.notebooks.nbmanager import NotebookManager
 from .services.notebooks.filenbmanager import FileNotebookManager
 from .services.clusters.clustermanager import ClusterManager
 from .services.sessions.sessionmanager import SessionManager
 
 from .base.handlers import AuthenticatedFileHandler, FileFindHandler
 
 from IPython.config import Config
 from IPython.config.application import catch_config_error, boolean_flag
 from IPython.core.application import (
     BaseIPythonApplication, base_flags, base_aliases,
 )
 from IPython.core.profiledir import ProfileDir
 from IPython.kernel import KernelManager
 from IPython.kernel.kernelspec import KernelSpecManager
 from IPython.kernel.zmq.session import default_secure, Session
 from IPython.nbformat.sign import NotebookNotary
 from IPython.utils.importstring import import_item
 from IPython.utils import submodule
 from IPython.utils.process import check_pid
 from IPython.utils.traitlets import (
     Dict, Unicode, Integer, List, Bool, Bytes, Instance,
     DottedObjectName, TraitError,
 )
 from IPython.utils import py3compat
 from IPython.utils.path import filefind, get_ipython_dir
 
 from .utils import url_path_join
 
 #-----------------------------------------------------------------------------
 # Module globals
 #-----------------------------------------------------------------------------
 
 _examples = """
 ipython notebook                       # start the notebook
 ipython notebook --profile=sympy       # use the sympy profile
 ipython notebook --certfile=mycert.pem # use SSL/TLS certificate
 """
 
 #-----------------------------------------------------------------------------
 # Helper functions
 #-----------------------------------------------------------------------------
 
 def random_ports(port, n):
     """Generate a list of n random ports near the given port.
 
     The first 5 ports will be sequential, and the remaining n-5 will be
     randomly selected in the range [port-2*n, port+2*n].
     """
     for i in range(min(5, n)):
         yield port + i
     for i in range(n-5):
         yield max(1, port + random.randint(-2*n, 2*n))
 
 def load_handlers(name):
     """Load the (URL pattern, handler) tuples for each component."""
     name = 'IPython.html.' + name
     mod = __import__(name, fromlist=['default_handlers'])
     return mod.default_handlers
 
 #-----------------------------------------------------------------------------
 # The Tornado web application
 #-----------------------------------------------------------------------------
 
 class NotebookWebApplication(web.Application):
 
     def __init__(self, ipython_app, kernel_manager, notebook_manager,
                  cluster_manager, session_manager, kernel_spec_manager, log,
                  base_url, settings_overrides, jinja_env_options):
 
         settings = self.init_settings(
             ipython_app, kernel_manager, notebook_manager, cluster_manager,
             session_manager, kernel_spec_manager, log, base_url,
             settings_overrides, jinja_env_options)
         handlers = self.init_handlers(settings)
 
         super(NotebookWebApplication, self).__init__(handlers, **settings)
 
     def init_settings(self, ipython_app, kernel_manager, notebook_manager,
                       cluster_manager, session_manager, kernel_spec_manager,
                       log, base_url, settings_overrides,
                       jinja_env_options=None):
         # Python < 2.6.5 doesn't accept unicode keys in f(**kwargs), and
         # base_url will always be unicode, which will in turn
         # make the patterns unicode, and ultimately result in unicode
         # keys in kwargs to handler._execute(**kwargs) in tornado.
         # This enforces that base_url be ascii in that situation.
         # 
         # Note that the URLs these patterns check against are escaped,
         # and thus guaranteed to be ASCII: 'héllo' is really 'h%C3%A9llo'.
         base_url = py3compat.unicode_to_str(base_url, 'ascii')
         template_path = settings_overrides.get("template_path", os.path.join(os.path.dirname(__file__), "templates"))
         jenv_opt = jinja_env_options if jinja_env_options else {}
         env = Environment(loader=FileSystemLoader(template_path),**jenv_opt )
         settings = dict(
             # basics
             log_function=log_request,
             base_url=base_url,
             template_path=template_path,
             static_path=ipython_app.static_file_path,
             static_handler_class = FileFindHandler,
             static_url_prefix = url_path_join(base_url,'/static/'),
             
             # authentication
             cookie_secret=ipython_app.cookie_secret,
             login_url=url_path_join(base_url,'/login'),
             password=ipython_app.password,
             
             # managers
             kernel_manager=kernel_manager,
             notebook_manager=notebook_manager,
             cluster_manager=cluster_manager,
             session_manager=session_manager,
             kernel_spec_manager=kernel_spec_manager,
 
             # IPython stuff
             nbextensions_path = ipython_app.nbextensions_path,
+            websocket_url=ipython_app.websocket_url,
             mathjax_url=ipython_app.mathjax_url,
             config=ipython_app.config,
             jinja2_env=env,
         )
 
         # allow custom overrides for the tornado web app.
         settings.update(settings_overrides)
         return settings
 
     def init_handlers(self, settings):
         # Load the (URL pattern, handler) tuples for each component.
         handlers = []
         handlers.extend(load_handlers('base.handlers'))
         handlers.extend(load_handlers('tree.handlers'))
         handlers.extend(load_handlers('auth.login'))
         handlers.extend(load_handlers('auth.logout'))
         handlers.extend(load_handlers('notebook.handlers'))
         handlers.extend(load_handlers('nbconvert.handlers'))
         handlers.extend(load_handlers('kernelspecs.handlers'))
         handlers.extend(load_handlers('services.kernels.handlers'))
         handlers.extend(load_handlers('services.notebooks.handlers'))
         handlers.extend(load_handlers('services.clusters.handlers'))
         handlers.extend(load_handlers('services.sessions.handlers'))
         handlers.extend(load_handlers('services.nbconvert.handlers'))
         handlers.extend(load_handlers('services.kernelspecs.handlers'))
         # FIXME: /files/ should be handled by the Contents service when it exists
         nbm = settings['notebook_manager']
         if hasattr(nbm, 'notebook_dir'):
             handlers.extend([
             (r"/files/(.*)", AuthenticatedFileHandler, {'path' : nbm.notebook_dir}),
             (r"/nbextensions/(.*)", FileFindHandler, {'path' : settings['nbextensions_path']}),
         ])
         # prepend base_url onto the patterns that we match
         new_handlers = []
         for handler in handlers:
             pattern = url_path_join(settings['base_url'], handler[0])
             new_handler = tuple([pattern] + list(handler[1:]))
             new_handlers.append(new_handler)
         # add 404 on the end, which will catch everything that falls through
         new_handlers.append((r'(.*)', Template404))
         return new_handlers
 
 
 class NbserverListApp(BaseIPythonApplication):
     
     description="List currently running notebook servers in this profile."
     
     flags = dict(
         json=({'NbserverListApp': {'json': True}},
               "Produce machine-readable JSON output."),
     )
     
     json = Bool(False, config=True,
           help="If True, each line of output will be a JSON object with the "
                   "details from the server info file.")
 
     def start(self):
         if not self.json:
             print("Currently running servers:")
         for serverinfo in list_running_servers(self.profile):
             if self.json:
                 print(json.dumps(serverinfo))
             else:
                 print(serverinfo['url'], "::", serverinfo['notebook_dir'])
 
 #-----------------------------------------------------------------------------
 # Aliases and Flags
 #-----------------------------------------------------------------------------
 
 flags = dict(base_flags)
 flags['no-browser']=(
     {'NotebookApp' : {'open_browser' : False}},
     "Don't open the notebook in a browser after startup."
 )
 flags['pylab']=(
     {'NotebookApp' : {'pylab' : 'warn'}},
     "DISABLED: use %pylab or %matplotlib in the notebook to enable matplotlib."
 )
 flags['no-mathjax']=(
     {'NotebookApp' : {'enable_mathjax' : False}},
     """Disable MathJax
     
     MathJax is the javascript library IPython uses to render math/LaTeX. It is
     very large, so you may want to disable it if you have a slow internet
     connection, or for offline use of the notebook.
     
     When disabled, equations etc. will appear as their untransformed TeX source.
     """
 )
 
 # Add notebook manager flags
 flags.update(boolean_flag('script', 'FileNotebookManager.save_script',
                'Auto-save a .py script everytime the .ipynb notebook is saved',
                'Do not auto-save .py scripts for every notebook'))
 
 aliases = dict(base_aliases)
 
 aliases.update({
     'ip': 'NotebookApp.ip',
     'port': 'NotebookApp.port',
     'port-retries': 'NotebookApp.port_retries',
     'transport': 'KernelManager.transport',
     'keyfile': 'NotebookApp.keyfile',
     'certfile': 'NotebookApp.certfile',
     'notebook-dir': 'NotebookApp.notebook_dir',
     'browser': 'NotebookApp.browser',
     'pylab': 'NotebookApp.pylab',
 })
 
 #-----------------------------------------------------------------------------
 # NotebookApp
 #-----------------------------------------------------------------------------
 
 class NotebookApp(BaseIPythonApplication):
 
     name = 'ipython-notebook'
     
     description = """
         The IPython HTML Notebook.
         
         This launches a Tornado based HTML Notebook Server that serves up an
         HTML5/Javascript Notebook client.
     """
     examples = _examples
     aliases = aliases
     flags = flags
     
     classes = [
         KernelManager, ProfileDir, Session, MappingKernelManager,
         NotebookManager, FileNotebookManager, NotebookNotary,
     ]
     flags = Dict(flags)
     aliases = Dict(aliases)
     
     subcommands = dict(
         list=(NbserverListApp, NbserverListApp.description.splitlines()[0]),
     )
 
     kernel_argv = List(Unicode)
     
     _log_formatter_cls = LogFormatter
 
     def _log_level_default(self):
         return logging.INFO
 
     def _log_datefmt_default(self):
         """Exclude date from default date format"""
         return "%H:%M:%S"
     
     def _log_format_default(self):
         """override default log format to include time"""
         return u"%(color)s[%(levelname)1.1s %(asctime)s.%(msecs).03d %(name)s]%(end_color)s %(message)s"
 
     # create requested profiles by default, if they don't exist:
     auto_create = Bool(True)
 
     # file to be opened in the notebook server
     file_to_run = Unicode('', config=True)
     def _file_to_run_changed(self, name, old, new):
         path, base = os.path.split(new)
         if path:
             self.file_to_run = base
             self.notebook_dir = path
 
     # Network related information
     
     allow_origin = Unicode('', config=True,
         help="""Set the Access-Control-Allow-Origin header
         
         Use '*' to allow any origin to access your server.
         
         Takes precedence over allow_origin_pat.
         """
     )
     
     allow_origin_pat = Unicode('', config=True,
         help="""Use a regular expression for the Access-Control-Allow-Origin header
         
         Requests from an origin matching the expression will get replies with:
         
             Access-Control-Allow-Origin: origin
         
         where `origin` is the origin of the request.
         
         Ignored if allow_origin is set.
         """
     )
     
     allow_credentials = Bool(False, config=True,
         help="Set the Access-Control-Allow-Credentials: true header"
     )
     
     ip = Unicode('localhost', config=True,
         help="The IP address the notebook server will listen on."
     )
 
     def _ip_changed(self, name, old, new):
         if new == u'*': self.ip = u''
 
     port = Integer(8888, config=True,
         help="The port the notebook server will listen on."
     )
     port_retries = Integer(50, config=True,
         help="The number of additional ports to try if the specified port is not available."
     )
 
     certfile = Unicode(u'', config=True, 
         help="""The full path to an SSL/TLS certificate file."""
     )
     
     keyfile = Unicode(u'', config=True, 
         help="""The full path to a private key file for usage with SSL/TLS."""
     )
     
     cookie_secret_file = Unicode(config=True,
         help="""The file where the cookie secret is stored."""
     )
     def _cookie_secret_file_default(self):
         if self.profile_dir is None:
             return ''
         return os.path.join(self.profile_dir.security_dir, 'notebook_cookie_secret')
     
     cookie_secret = Bytes(b'', config=True,
         help="""The random bytes used to secure cookies.
         By default this is a new random number every time you start the Notebook.
         Set it to a value in a config file to enable logins to persist across server sessions.
         
         Note: Cookie secrets should be kept private, do not share config files with
         cookie_secret stored in plaintext (you can read the value from a file).
         """
     )
     def _cookie_secret_default(self):
         if os.path.exists(self.cookie_secret_file):
             with io.open(self.cookie_secret_file, 'rb') as f:
                 return f.read()
         else:
             secret = base64.encodestring(os.urandom(1024))
             self._write_cookie_secret_file(secret)
             return secret
     
     def _write_cookie_secret_file(self, secret):
         """write my secret to my secret_file"""
         self.log.info("Writing notebook server cookie secret to %s", self.cookie_secret_file)
         with io.open(self.cookie_secret_file, 'wb') as f:
             f.write(secret)
         try:
             os.chmod(self.cookie_secret_file, 0o600)
         except OSError:
             self.log.warn(
                 "Could not set permissions on %s",
                 self.cookie_secret_file
             )
 
     password = Unicode(u'', config=True,
                       help="""Hashed password to use for web authentication.
 
                       To generate, type in a python/IPython shell:
 
                         from IPython.lib import passwd; passwd()
 
                       The string should be of the form type:salt:hashed-password.
                       """
     )
 
     open_browser = Bool(True, config=True,
                         help="""Whether to open in a browser after starting.
                         The specific browser used is platform dependent and
                         determined by the python standard library `webbrowser`
                         module, unless it is overridden using the --browser
                         (NotebookApp.browser) configuration option.
                         """)
 
     browser = Unicode(u'', config=True,
                       help="""Specify what command to use to invoke a web
                       browser when opening the notebook. If not specified, the
                       default browser will be determined by the `webbrowser`
                       standard library module, which allows setting of the
                       BROWSER environment variable to override it.
                       """)
     
     webapp_settings = Dict(config=True,
             help="Supply overrides for the tornado.web.Application that the "
                  "IPython notebook uses.")
 
     jinja_environment_options = Dict(config=True, 
             help="Supply extra arguments that will be passed to Jinja environment.")
 
     
     enable_mathjax = Bool(True, config=True,
         help="""Whether to enable MathJax for typesetting math/TeX
 
         MathJax is the javascript library IPython uses to render math/LaTeX. It is
         very large, so you may want to disable it if you have a slow internet
         connection, or for offline use of the notebook.
 
         When disabled, equations etc. will appear as their untransformed TeX source.
         """
     )
     def _enable_mathjax_changed(self, name, old, new):
         """set mathjax url to empty if mathjax is disabled"""
         if not new:
             self.mathjax_url = u''
 
     base_url = Unicode('/', config=True,
                                help='''The base URL for the notebook server.
 
                                Leading and trailing slashes can be omitted,
                                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')]
 
+    websocket_url = Unicode("", config=True,
+        help="""The base URL for websockets,
+        if it differs from the HTTP server (hint: it almost certainly doesn't).
+        
+        Should be in the form of an HTTP origin: ws[s]://hostname[:port]
+        """
+    )
     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
         url = u"//cdn.mathjax.org/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.'
     )
     kernel_manager_class = DottedObjectName('IPython.html.services.kernels.kernelmanager.MappingKernelManager',
         config=True,
         help='The kernel manager class to use.'
     )
     session_manager_class = DottedObjectName('IPython.html.services.sessions.sessionmanager.SessionManager',
         config=True,
         help='The session manager class to use.'
     )
     cluster_manager_class = DottedObjectName('IPython.html.services.clusters.clustermanager.ClusterManager',
         config=True,
         help='The cluster manager class to use.'
     )
 
     kernel_spec_manager = Instance(KernelSpecManager)
 
     def _kernel_spec_manager_default(self):
         return KernelSpecManager(ipython_dir=self.ipython_dir)
 
     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."
     )
     
     pylab = Unicode('disabled', config=True,
         help="""
         DISABLED: use %pylab or %matplotlib in the notebook to enable matplotlib.
         """
     )
     def _pylab_changed(self, name, old, new):
         """when --pylab is specified, display a warning and exit"""
         if new != 'warn':
             backend = ' %s' % new
         else:
             backend = ''
         self.log.error("Support for specifying --pylab on the command line has been removed.")
         self.log.error(
             "Please use `%pylab{0}` or `%matplotlib{0}` in the notebook itself.".format(backend)
         )
         self.exit(1)
 
     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"""
         # Kernel should get *absolute* path to profile directory
         self.kernel_argv = ["--profile-dir", self.profile_dir.location]
 
     def init_configurables(self):
         # force Session default to be secure
         default_secure(self.config)
         kls = import_item(self.kernel_manager_class)
         self.kernel_manager = kls(
             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)
         kls = import_item(self.session_manager_class)
         self.session_manager = kls(parent=self, log=self.log,
                                    kernel_manager=self.kernel_manager,
                                    notebook_manager=self.notebook_manager)
         kls = import_item(self.cluster_manager_class)
         self.cluster_manager = kls(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
         logger = logging.getLogger('tornado')
         logger.propagate = True
         logger.parent = self.log
         logger.setLevel(self.log.level)
     
     def init_webapp(self):
         """initialize tornado webapp and httpserver"""
         self.webapp_settings['allow_origin'] = self.allow_origin
         if self.allow_origin_pat:
             self.webapp_settings['allow_origin_pat'] = re.compile(self.allow_origin_pat)
         self.webapp_settings['allow_credentials'] = self.allow_credentials
         
         self.web_app = NotebookWebApplication(
             self, self.kernel_manager, self.notebook_manager, 
             self.cluster_manager, self.session_manager, self.kernel_spec_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.
         """
         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),
                 'pid': os.getpid()
                }
 
     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
     that profile, and yield dicts of their information, each one pertaining to
     a currently running notebook server instance.
     """
     pd = ProfileDir.find_profile_dir_by_name(get_ipython_dir(), name=profile)
     for file in os.listdir(pd.security_dir):
         if file.startswith('nbserver-'):
             with io.open(os.path.join(pd.security_dir, file), encoding='utf-8') as f:
                 info = json.load(f)
 
             # Simple check whether that process is really still running
             if check_pid(info['pid']):
                 yield info
             else:
                 # If the process has died, try to delete its info file
                 try:
                     os.unlink(file)
                 except OSError:
                     pass  # TODO: This should warn or log or something
 #-----------------------------------------------------------------------------
 # Main entry point
 #-----------------------------------------------------------------------------
 
 launch_new_instance = NotebookApp.launch_instance
 

IPython/html/static/notebook/js/main.js

@@ -1,136 +1,137
 // Copyright (c) IPython Development Team.
 // Distributed under the terms of the Modified BSD License.
 
 require([
     'base/js/namespace',
     'jquery',
     'notebook/js/notebook',
     'base/js/utils',
     'base/js/page',
     'notebook/js/layoutmanager',
     'base/js/events',
     'auth/js/loginwidget',
     'notebook/js/maintoolbar',
     'notebook/js/pager',
     'notebook/js/quickhelp',
     'notebook/js/menubar',
     'notebook/js/notificationarea',
     'notebook/js/savewidget',
     'notebook/js/keyboardmanager',
     'notebook/js/config',
 ], function(
     IPython, 
     $,
     notebook, 
     utils, 
     page, 
     layoutmanager, 
     events,
     loginwidget, 
     maintoolbar, 
     pager, 
     quickhelp, 
     menubar, 
     notificationarea, 
     savewidget, 
     keyboardmanager,
     config
     ) {
     "use strict";
 
     $('#ipython-main-app').addClass('border-box-sizing');
     $('div#notebook_panel').addClass('border-box-sizing');
 
     var common_options = {
         base_url : utils.get_body_data("baseUrl"),
+        ws_url : IPython.utils.get_body_data("wsUrl"),
         notebook_path : utils.get_body_data("notebookPath"),
         notebook_name : utils.get_body_data('notebookName')
     };
 
     var user_config = $.extend({}, config.default_config);
     var page = new page.Page();
     var layout_manager = new layoutmanager.LayoutManager();
     var events = $([new events.Events()]);
     var pager = new pager.Pager('div#pager', 'div#pager_splitter', {
         layout_manager: layout_manager, 
         events: events});
     var keyboard_manager = new keyboardmanager.KeyboardManager({
         pager: pager, 
         events: events});
     var save_widget = new savewidget.SaveWidget('span#save_widget', {
         events: events, 
         keyboard_manager: keyboard_manager});
     var notebook = new notebook.Notebook('div#notebook', $.extend({
         events: events,
         keyboard_manager: keyboard_manager,
         save_widget: save_widget,
         config: user_config},
         common_options));
     var login_widget = new loginwidget.LoginWidget('span#login_widget', common_options);
     var toolbar = new maintoolbar.MainToolBar('#maintoolbar-container', {
         notebook: notebook, 
         events: events}); 
     var quick_help = new quickhelp.QuickHelp({
         keyboard_manager: keyboard_manager, 
         events: events,
         notebook: notebook});
     var menubar = new menubar.MenuBar('#menubar', $.extend({
         notebook: notebook, 
         layout_manager: layout_manager, 
         events: events, 
         save_widget: save_widget, 
         quick_help: quick_help}, 
         common_options));
     var notification_area = new notificationarea.NotificationArea(
         '#notification_area', {
         events: events, 
         save_widget: save_widget, 
         notebook: notebook,
         keyboard_manager: keyboard_manager});
     notification_area.init_notification_widgets();
 
     $('body').append('<div id="fonttest"><pre><span id="test1">x</span>'+
                      '<span id="test2" style="font-weight: bold;">x</span>'+
                      '<span id="test3" style="font-style: italic;">x</span></pre></div>');
     var nh = $('#test1').innerHeight();
     var bh = $('#test2').innerHeight();
     var ih = $('#test3').innerHeight();
     if(nh != bh || nh != ih) {
         $('head').append('<style>.CodeMirror span { vertical-align: bottom; }</style>');
     }
     $('#fonttest').remove();
 
     page.show();
 
     layout_manager.do_resize();
     var first_load = function () {
         layout_manager.do_resize();
         var hash = document.location.hash;
         if (hash) {
             document.location.hash = '';
             document.location.hash = hash;
         }
         notebook.set_autosave_interval(notebook.minimum_autosave_interval);
         // only do this once
         events.off('notebook_loaded.Notebook', first_load);
     };
     
     events.on('notebook_loaded.Notebook', first_load);
     events.trigger('app_initialized.NotebookApp');
     notebook.load_notebook(common_options.notebook_name, common_options.notebook_path);
 
     IPython.page = page;
     IPython.layout_manager = layout_manager;
     IPython.notebook = notebook;
     IPython.pager = pager;
     IPython.quick_help = quick_help;
     IPython.login_widget = login_widget;
     IPython.menubar = menubar;
     IPython.toolbar = toolbar;
     IPython.notification_area = notification_area;
     IPython.events = events;
     IPython.keyboard_manager = keyboard_manager;
     IPython.save_widget = save_widget;
     IPython.config = user_config;
     IPython.tooltip = notebook.tooltip;
 });

IPython/html/static/services/kernels/js/kernel.js

@@ -1,613 +1,616
 // Copyright (c) IPython Development Team.
 // Distributed under the terms of the Modified BSD License.
 
 define([
     'base/js/namespace',
     'jquery',
     'base/js/utils',
     'services/kernels/js/comm',
     'widgets/js/init',
 ], function(IPython, $, utils, comm, widgetmanager) {
     "use strict";
 
     // Initialization and connection.
     /**
      * A Kernel Class to communicate with the Python kernel
      * @Class Kernel
      */
     var Kernel = function (kernel_service_url, notebook, name) {
         this.events = notebook.events;
         this.kernel_id = null;
         this.shell_channel = null;
         this.iopub_channel = null;
         this.stdin_channel = null;
         this.kernel_service_url = kernel_service_url;
         this.name = name;
+        this.ws_url = IPython.utils.get_body_data("wsUrl");
+        if (!this.ws_url) {
+            // trailing 's' in https will become wss for secure web sockets
+            this.ws_url = location.protocol.replace('http', 'ws') + "//" + location.host;
+        }
         this.running = false;
         this.username = "username";
         this.session_id = utils.uuid();
         this._msg_callbacks = {};
         this.post = $.post;
 
         if (typeof(WebSocket) !== 'undefined') {
             this.WebSocket = WebSocket;
         } else if (typeof(MozWebSocket) !== 'undefined') {
             this.WebSocket = MozWebSocket;
         } else {
             alert('Your browser does not have WebSocket support, please try Chrome, Safari or Firefox ≥ 6. Firefox 4 and 5 are also supported by you have to enable WebSockets in about:config.');
         }
         
         this.bind_events();
         this.init_iopub_handlers();
         this.comm_manager = new comm.CommManager(this);
         this.widget_manager = new widgetmanager.WidgetManager(this.comm_manager, notebook);
         
         this.last_msg_id = null;
         this.last_msg_callbacks = {};
     };
 
 
     Kernel.prototype._get_msg = function (msg_type, content, metadata) {
         var msg = {
             header : {
                 msg_id : utils.uuid(),
                 username : this.username,
                 session : this.session_id,
                 msg_type : msg_type,
                 version : "5.0"
             },
             metadata : metadata || {},
             content : content,
             parent_header : {}
         };
         return msg;
     };
     
     Kernel.prototype.bind_events = function () {
         var that = this;
         this.events.on('send_input_reply.Kernel', function(evt, data) { 
             that.send_input_reply(data);
         });
     };
     
     // Initialize the iopub handlers
     
     Kernel.prototype.init_iopub_handlers = function () {
         var output_msg_types = ['stream', 'display_data', 'execute_result', 'error'];
         this._iopub_handlers = {};
         this.register_iopub_handler('status', $.proxy(this._handle_status_message, this));
         this.register_iopub_handler('clear_output', $.proxy(this._handle_clear_output, this));
         
         for (var i=0; i < output_msg_types.length; i++) {
             this.register_iopub_handler(output_msg_types[i], $.proxy(this._handle_output_message, this));
         }
     };
 
     /**
      * Start the Python kernel
      * @method start
      */
     Kernel.prototype.start = function (params) {
         params = params || {};
         if (!this.running) {
             var qs = $.param(params);
             this.post(utils.url_join_encode(this.kernel_service_url) + '?' + qs,
                 $.proxy(this._kernel_started, this),
                 'json'
             );
         }
     };
 
     /**
      * Restart the python kernel.
      *
      * Emit a 'status_restarting.Kernel' event with
      * the current object as parameter
      *
      * @method restart
      */
     Kernel.prototype.restart = function () {
         this.events.trigger('status_restarting.Kernel', {kernel: this});
         if (this.running) {
             this.stop_channels();
             this.post(utils.url_join_encode(this.kernel_url, "restart"),
                 $.proxy(this._kernel_started, this),
                 'json'
             );
         }
     };
 
 
     Kernel.prototype._kernel_started = function (json) {
         console.log("Kernel started: ", json.id);
         this.running = true;
         this.kernel_id = json.id;
-        // trailing 's' in https will become wss for secure web sockets
-        this.ws_host = location.protocol.replace('http', 'ws') + "//" + location.host;
         this.kernel_url = utils.url_path_join(this.kernel_service_url, this.kernel_id);
         this.start_channels();
     };
 
 
     Kernel.prototype._websocket_closed = function(ws_url, early) {
         this.stop_channels();
         this.events.trigger('websocket_closed.Kernel',
             {ws_url: ws_url, kernel: this, early: early}
         );
     };
 
     /**
      * Start the `shell`and `iopub` channels.
      * Will stop and restart them if they already exist.
      *
      * @method start_channels
      */
     Kernel.prototype.start_channels = function () {
         var that = this;
         this.stop_channels();
-        var ws_host_url = this.ws_host + this.kernel_url;
+        var ws_host_url = this.ws_url + this.kernel_url;
         console.log("Starting WebSockets:", ws_host_url);
         this.shell_channel = new this.WebSocket(
-            this.ws_host + utils.url_join_encode(this.kernel_url, "shell")
+            this.ws_url + utils.url_join_encode(this.kernel_url, "shell")
         );
         this.stdin_channel = new this.WebSocket(
-            this.ws_host + utils.url_join_encode(this.kernel_url, "stdin")
+            this.ws_url + utils.url_join_encode(this.kernel_url, "stdin")
         );
         this.iopub_channel = new this.WebSocket(
-            this.ws_host + utils.url_join_encode(this.kernel_url, "iopub")
+            this.ws_url + utils.url_join_encode(this.kernel_url, "iopub")
         );
         
         var already_called_onclose = false; // only alert once
         var ws_closed_early = function(evt){
             if (already_called_onclose){
                 return;
             }
             already_called_onclose = true;
             if ( ! evt.wasClean ){
                 that._websocket_closed(ws_host_url, true);
             }
         };
         var ws_closed_late = function(evt){
             if (already_called_onclose){
                 return;
             }
             already_called_onclose = true;
             if ( ! evt.wasClean ){
                 that._websocket_closed(ws_host_url, false);
             }
         };
         var channels = [this.shell_channel, this.iopub_channel, this.stdin_channel];
         for (var i=0; i < channels.length; i++) {
             channels[i].onopen = $.proxy(this._ws_opened, this);
             channels[i].onclose = ws_closed_early;
         }
         // switch from early-close to late-close message after 1s
         setTimeout(function() {
             for (var i=0; i < channels.length; i++) {
                 if (channels[i] !== null) {
                     channels[i].onclose = ws_closed_late;
                 }
             }
         }, 1000);
         this.shell_channel.onmessage = $.proxy(this._handle_shell_reply, this);
         this.iopub_channel.onmessage = $.proxy(this._handle_iopub_message, this);
         this.stdin_channel.onmessage = $.proxy(this._handle_input_request, this);
     };
 
     /**
      * Handle a websocket entering the open state
      * sends session and cookie authentication info as first message.
      * Once all sockets are open, signal the Kernel.status_started event.
      * @method _ws_opened
      */
     Kernel.prototype._ws_opened = function (evt) {
         // send the session id so the Session object Python-side
         // has the same identity
         evt.target.send(this.session_id + ':' + document.cookie);
         
         var channels = [this.shell_channel, this.iopub_channel, this.stdin_channel];
         for (var i=0; i < channels.length; i++) {
             // if any channel is not ready, don't trigger event.
             if ( !channels[i].readyState ) return;
         }
         // all events ready, trigger started event.
         this.events.trigger('status_started.Kernel', {kernel: this});
     };
     
     /**
      * Stop the websocket channels.
      * @method stop_channels
      */
     Kernel.prototype.stop_channels = function () {
         var channels = [this.shell_channel, this.iopub_channel, this.stdin_channel];
         for (var i=0; i < channels.length; i++) {
             if ( channels[i] !== null ) {
                 channels[i].onclose = null;
                 channels[i].close();
             }
         }
         this.shell_channel = this.iopub_channel = this.stdin_channel = null;
     };
 
     // Main public methods.
     
     // send a message on the Kernel's shell channel
     Kernel.prototype.send_shell_message = function (msg_type, content, callbacks, metadata) {
         var msg = this._get_msg(msg_type, content, metadata);
         this.shell_channel.send(JSON.stringify(msg));
         this.set_callbacks_for_msg(msg.header.msg_id, callbacks);
         return msg.header.msg_id;
     };
 
     /**
      * Get kernel info
      *
      * @param callback {function}
      * @method kernel_info
      *
      * When calling this method, pass a callback function that expects one argument.
      * The callback will be passed the complete `kernel_info_reply` message documented
      * [here](http://ipython.org/ipython-doc/dev/development/messaging.html#kernel-info)
      */
     Kernel.prototype.kernel_info = function (callback) {
         var callbacks;
         if (callback) {
             callbacks = { shell : { reply : callback } };
         }
         return this.send_shell_message("kernel_info_request", {}, callbacks);
     };
 
     /**
      * Get info on an object
      *
      * @param code {string}
      * @param cursor_pos {integer}
      * @param callback {function}
      * @method inspect
      *
      * When calling this method, pass a callback function that expects one argument.
      * The callback will be passed the complete `inspect_reply` message documented
      * [here](http://ipython.org/ipython-doc/dev/development/messaging.html#object-information)
      */
     Kernel.prototype.inspect = function (code, cursor_pos, callback) {
         var callbacks;
         if (callback) {
             callbacks = { shell : { reply : callback } };
         }
         
         var content = {
             code : code,
             cursor_pos : cursor_pos,
             detail_level : 0,
         };
         return this.send_shell_message("inspect_request", content, callbacks);
     };
 
     /**
      * Execute given code into kernel, and pass result to callback.
      *
      * @async
      * @method execute
      * @param {string} code
      * @param [callbacks] {Object} With the following keys (all optional)
      *      @param callbacks.shell.reply {function}
      *      @param callbacks.shell.payload.[payload_name] {function}
      *      @param callbacks.iopub.output {function}
      *      @param callbacks.iopub.clear_output {function}
      *      @param callbacks.input {function}
      * @param {object} [options]
      *      @param [options.silent=false] {Boolean}
      *      @param [options.user_expressions=empty_dict] {Dict}
      *      @param [options.allow_stdin=false] {Boolean} true|false
      *
      * @example
      *
      * The options object should contain the options for the execute call. Its default
      * values are:
      *
      *      options = {
      *        silent : true,
      *        user_expressions : {},
      *        allow_stdin : false
      *      }
      *
      * When calling this method pass a callbacks structure of the form:
      *
      *      callbacks = {
      *       shell : {
      *         reply : execute_reply_callback,
      *         payload : {
      *           set_next_input : set_next_input_callback,
      *         }
      *       },
      *       iopub : {
      *         output : output_callback,
      *         clear_output : clear_output_callback,
      *       },
      *       input : raw_input_callback
      *      }
      *
      * Each callback will be passed the entire message as a single arugment.
      * Payload handlers will be passed the corresponding payload and the execute_reply message.
      */
     Kernel.prototype.execute = function (code, callbacks, options) {
 
         var content = {
             code : code,
             silent : true,
             store_history : false,
             user_expressions : {},
             allow_stdin : false
         };
         callbacks = callbacks || {};
         if (callbacks.input !== undefined) {
             content.allow_stdin = true;
         }
         $.extend(true, content, options);
         this.events.trigger('execution_request.Kernel', {kernel: this, content:content});
         return this.send_shell_message("execute_request", content, callbacks);
     };
 
     /**
      * When calling this method, pass a function to be called with the `complete_reply` message
      * as its only argument when it arrives.
      *
      * `complete_reply` is documented
      * [here](http://ipython.org/ipython-doc/dev/development/messaging.html#complete)
      *
      * @method complete
      * @param code {string}
      * @param cursor_pos {integer}
      * @param callback {function}
      *
      */
     Kernel.prototype.complete = function (code, cursor_pos, callback) {
         var callbacks;
         if (callback) {
             callbacks = { shell : { reply : callback } };
         }
         var content = {
             code : code,
             cursor_pos : cursor_pos,
         };
         return this.send_shell_message("complete_request", content, callbacks);
     };
 
 
     Kernel.prototype.interrupt = function () {
         if (this.running) {
             this.events.trigger('status_interrupting.Kernel', {kernel: this});
             this.post(utils.url_join_encode(this.kernel_url, "interrupt"));
         }
     };
 
 
     Kernel.prototype.kill = function () {
         if (this.running) {
             this.running = false;
             var settings = {
                 cache : false,
                 type : "DELETE",
                 error : utils.log_ajax_error,
             };
             $.ajax(utils.url_join_encode(this.kernel_url), settings);
         }
     };
 
     Kernel.prototype.send_input_reply = function (input) {
         var content = {
             value : input,
         };
         this.events.trigger('input_reply.Kernel', {kernel: this, content:content});
         var msg = this._get_msg("input_reply", content);
         this.stdin_channel.send(JSON.stringify(msg));
         return msg.header.msg_id;
     };
 
 
     // Reply handlers
 
     Kernel.prototype.register_iopub_handler = function (msg_type, callback) {
         this._iopub_handlers[msg_type] = callback;
     };
 
     Kernel.prototype.get_iopub_handler = function (msg_type) {
         // get iopub handler for a specific message type
         return this._iopub_handlers[msg_type];
     };
 
 
     Kernel.prototype.get_callbacks_for_msg = function (msg_id) {
         // get callbacks for a specific message
         if (msg_id == this.last_msg_id) {
             return this.last_msg_callbacks;
         } else {
             return this._msg_callbacks[msg_id];
         }
     };
 
 
     Kernel.prototype.clear_callbacks_for_msg = function (msg_id) {
         if (this._msg_callbacks[msg_id] !== undefined ) {
             delete this._msg_callbacks[msg_id];
         }
     };
     
     Kernel.prototype._finish_shell = function (msg_id) {
         var callbacks = this._msg_callbacks[msg_id];
         if (callbacks !== undefined) {
             callbacks.shell_done = true;
             if (callbacks.iopub_done) {
                 this.clear_callbacks_for_msg(msg_id);
             }
         }
     };
 
     Kernel.prototype._finish_iopub = function (msg_id) {
         var callbacks = this._msg_callbacks[msg_id];
         if (callbacks !== undefined) {
             callbacks.iopub_done = true;
             if (callbacks.shell_done) {
                 this.clear_callbacks_for_msg(msg_id);
             }
         }
     };
     
     /* Set callbacks for a particular message.
      * Callbacks should be a struct of the following form:
      * shell : {
      * 
      * }
     
      */
     Kernel.prototype.set_callbacks_for_msg = function (msg_id, callbacks) {
         this.last_msg_id = msg_id;
         if (callbacks) {
             // shallow-copy mapping, because we will modify it at the top level
             var cbcopy = this._msg_callbacks[msg_id] = this.last_msg_callbacks = {};
             cbcopy.shell = callbacks.shell;
             cbcopy.iopub = callbacks.iopub;
             cbcopy.input = callbacks.input;
             cbcopy.shell_done = (!callbacks.shell);
             cbcopy.iopub_done = (!callbacks.iopub);
         } else {
             this.last_msg_callbacks = {};
         }
     };
 
 
     Kernel.prototype._handle_shell_reply = function (e) {
         var reply = $.parseJSON(e.data);
         this.events.trigger('shell_reply.Kernel', {kernel: this, reply:reply});
         var content = reply.content;
         var metadata = reply.metadata;
         var parent_id = reply.parent_header.msg_id;
         var callbacks = this.get_callbacks_for_msg(parent_id);
         if (!callbacks || !callbacks.shell) {
             return;
         }
         var shell_callbacks = callbacks.shell;
         
         // signal that shell callbacks are done
         this._finish_shell(parent_id);
         
         if (shell_callbacks.reply !== undefined) {
             shell_callbacks.reply(reply);
         }
         if (content.payload && shell_callbacks.payload) {
             this._handle_payloads(content.payload, shell_callbacks.payload, reply);
         }
     };
 
 
     Kernel.prototype._handle_payloads = function (payloads, payload_callbacks, msg) {
         var l = payloads.length;
         // Payloads are handled by triggering events because we don't want the Kernel
         // to depend on the Notebook or Pager classes.
         for (var i=0; i<l; i++) {
             var payload = payloads[i];
             var callback = payload_callbacks[payload.source];
             if (callback) {
                 callback(payload, msg);
             }
         }
     };
 
     Kernel.prototype._handle_status_message = function (msg) {
         var execution_state = msg.content.execution_state;
         var parent_id = msg.parent_header.msg_id;
         
         // dispatch status msg callbacks, if any
         var callbacks = this.get_callbacks_for_msg(parent_id);
         if (callbacks && callbacks.iopub && callbacks.iopub.status) {
             try {
                 callbacks.iopub.status(msg);
             } catch (e) {
                 console.log("Exception in status msg handler", e, e.stack);
             }
         }
         
         if (execution_state === 'busy') {
             this.events.trigger('status_busy.Kernel', {kernel: this});
         } else if (execution_state === 'idle') {
             // signal that iopub callbacks are (probably) done
             // async output may still arrive,
             // but only for the most recent request
             this._finish_iopub(parent_id);
             
             // trigger status_idle event
             this.events.trigger('status_idle.Kernel', {kernel: this});
         } else if (execution_state === 'restarting') {
             // autorestarting is distinct from restarting,
             // in that it means the kernel died and the server is restarting it.
             // status_restarting sets the notification widget,
             // autorestart shows the more prominent dialog.
             this.events.trigger('status_autorestarting.Kernel', {kernel: this});
             this.events.trigger('status_restarting.Kernel', {kernel: this});
         } else if (execution_state === 'dead') {
             this.stop_channels();
             this.events.trigger('status_dead.Kernel', {kernel: this});
         }
     };
     
     
     // handle clear_output message
     Kernel.prototype._handle_clear_output = function (msg) {
         var callbacks = this.get_callbacks_for_msg(msg.parent_header.msg_id);
         if (!callbacks || !callbacks.iopub) {
             return;
         }
         var callback = callbacks.iopub.clear_output;
         if (callback) {
             callback(msg);
         }
     };
 
 
     // handle an output message (execute_result, display_data, etc.)
     Kernel.prototype._handle_output_message = function (msg) {
         var callbacks = this.get_callbacks_for_msg(msg.parent_header.msg_id);
         if (!callbacks || !callbacks.iopub) {
             return;
         }
         var callback = callbacks.iopub.output;
         if (callback) {
             callback(msg);
         }
     };
 
     // dispatch IOPub messages to respective handlers.
     // each message type should have a handler.
     Kernel.prototype._handle_iopub_message = function (e) {
         var msg = $.parseJSON(e.data);
 
         var handler = this.get_iopub_handler(msg.header.msg_type);
         if (handler !== undefined) {
             handler(msg);
         }
     };
 
 
     Kernel.prototype._handle_input_request = function (e) {
         var request = $.parseJSON(e.data);
         var header = request.header;
         var content = request.content;
         var metadata = request.metadata;
         var msg_type = header.msg_type;
         if (msg_type !== 'input_request') {
             console.log("Invalid input request!", request);
             return;
         }
         var callbacks = this.get_callbacks_for_msg(request.parent_header.msg_id);
         if (callbacks) {
             if (callbacks.input) {
                 callbacks.input(request);
             }
         }
     };
 
     // Backwards compatability.
     IPython.Kernel = Kernel;
 
     return {'Kernel': Kernel};
 });

IPython/html/templates/notebook.html

@@ -1,320 +1,321
 {% extends "page.html" %}
 
 {% block stylesheet %}
 
 {% if mathjax_url %}
 <script type="text/javascript" src="{{mathjax_url}}?config=TeX-AMS_HTML-full&delayStartupUntil=configured" charset="utf-8"></script>
 {% endif %}
 <script type="text/javascript">
 // MathJax disabled, set as null to distingish from *missing* MathJax,
 // where it will be undefined, and should prompt a dialog later.
 window.mathjax_url = "{{mathjax_url}}";
 </script>
 
 <link rel="stylesheet" href="{{ static_url("components/bootstrap-tour/build/css/bootstrap-tour.min.css") }}" type="text/css" />
 <link rel="stylesheet" href="{{ static_url("components/codemirror/lib/codemirror.css") }}">
 
 {{super()}}
 
 <link rel="stylesheet" href="{{ static_url("notebook/css/override.css") }}" type="text/css" />
 
 {% endblock %}
 
 {% block params %}
 
 data-project="{{project}}"
 data-base-url="{{base_url}}"
+data-ws-url="{{ws_url}}"
 data-notebook-name="{{notebook_name}}"
 data-notebook-path="{{notebook_path}}"
 class="notebook_app"
 
 {% endblock %}
 
 
 {% block header %}
 
 <span id="save_widget" class="nav pull-left">
     <span id="notebook_name"></span>
     <span id="checkpoint_status"></span>
     <span id="autosave_status"></span>
 </span>
 
 {% endblock %}
 
 
 {% block site %}
 
 <div id="menubar-container" class="container">
 <div id="menubar">
     <div id="menus" class="navbar navbar-default" role="navigation">
         <div class="container-fluid">
             <ul class="nav navbar-nav">
                 <li class="dropdown"><a href="#" class="dropdown-toggle" data-toggle="dropdown">File</a>
                     <ul id="file_menu" class="dropdown-menu">
                         <li id="new_notebook"
                             title="Make a new notebook (Opens a new window)">
                             <a href="#">New</a></li>
                         <li id="open_notebook"
                             title="Opens a new window with the Dashboard view">
                             <a href="#">Open...</a></li>
                         <!-- <hr/> -->
                         <li class="divider"></li>
                         <li id="copy_notebook"
                             title="Open a copy of this notebook's contents and start a new kernel">
                             <a href="#">Make a Copy...</a></li>
                         <li id="rename_notebook"><a href="#">Rename...</a></li>
                         <li id="save_checkpoint"><a href="#">Save and Checkpoint</a></li>
                         <!-- <hr/> -->
                         <li class="divider"></li>
                         <li id="restore_checkpoint" class="dropdown-submenu"><a href="#">Revert to Checkpoint</a>
                           <ul class="dropdown-menu">
                             <li><a href="#"></a></li>
                             <li><a href="#"></a></li>
                             <li><a href="#"></a></li>
                             <li><a href="#"></a></li>
                             <li><a href="#"></a></li>
                           </ul>
                         </li>
                         <li class="divider"></li>
                         <li id="print_preview"><a href="#">Print Preview</a></li>
                         <li class="dropdown-submenu"><a href="#">Download as</a>
                             <ul class="dropdown-menu">
                                 <li id="download_ipynb"><a href="#">IPython Notebook (.ipynb)</a></li>
                                 <li id="download_py"><a href="#">Python (.py)</a></li>
                                 <li id="download_html"><a href="#">HTML (.html)</a></li>
                                 <li id="download_rst"><a href="#">reST (.rst)</a></li>
                                 <li id="download_pdf"><a href="#">PDF (.pdf)</a></li>
                             </ul>
                         </li>
                         <li class="divider"></li>
                         <li id="trust_notebook"
                             title="Trust the output of this notebook">
                             <a href="#" >Trust Notebook</a></li>
                         <li class="divider"></li>
                         <li id="kill_and_exit"
                             title="Shutdown this notebook's kernel, and close this window">
                             <a href="#" >Close and halt</a></li>
                     </ul>
                 </li>
                 <li class="dropdown"><a href="#" class="dropdown-toggle" data-toggle="dropdown">Edit</a>
                     <ul id="edit_menu" class="dropdown-menu">
                         <li id="cut_cell"><a href="#">Cut Cell</a></li>
                         <li id="copy_cell"><a href="#">Copy Cell</a></li>
                         <li id="paste_cell_above" class="disabled"><a href="#">Paste Cell Above</a></li>
                         <li id="paste_cell_below" class="disabled"><a href="#">Paste Cell Below</a></li>
                         <li id="paste_cell_replace" class="disabled"><a href="#">Paste Cell &amp; Replace</a></li>
                         <li id="delete_cell"><a href="#">Delete Cell</a></li>
                         <li id="undelete_cell" class="disabled"><a href="#">Undo Delete Cell</a></li>
                         <li class="divider"></li>
                         <li id="split_cell"><a href="#">Split Cell</a></li>
                         <li id="merge_cell_above"><a href="#">Merge Cell Above</a></li>
                         <li id="merge_cell_below"><a href="#">Merge Cell Below</a></li>
                         <li class="divider"></li>
                         <li id="move_cell_up"><a href="#">Move Cell Up</a></li>
                         <li id="move_cell_down"><a href="#">Move Cell Down</a></li>
                         <li class="divider"></li>
                         <li id="edit_nb_metadata"><a href="#">Edit Notebook Metadata</a></li>
                     </ul>
                 </li>
                 <li class="dropdown"><a href="#" class="dropdown-toggle" data-toggle="dropdown">View</a>
                     <ul id="view_menu" class="dropdown-menu">
                         <li id="toggle_header"
                             title="Show/Hide the IPython Notebook logo and notebook title (above menu bar)">
                             <a href="#">Toggle Header</a></li>
                         <li id="toggle_toolbar"
                             title="Show/Hide the action icons (below menu bar)">
                             <a href="#">Toggle Toolbar</a></li>
                     </ul>
                 </li>
                 <li class="dropdown"><a href="#" class="dropdown-toggle" data-toggle="dropdown">Insert</a>
                     <ul id="insert_menu" class="dropdown-menu">
                         <li id="insert_cell_above"
                             title="Insert an empty Code cell above the currently active cell">
                             <a href="#">Insert Cell Above</a></li>
                         <li id="insert_cell_below"
                             title="Insert an empty Code cell below the currently active cell">
                             <a href="#">Insert Cell Below</a></li>
                     </ul>
                 </li>
                 <li class="dropdown"><a href="#" class="dropdown-toggle" data-toggle="dropdown">Cell</a>
                     <ul id="cell_menu" class="dropdown-menu">
                         <li id="run_cell" title="Run this cell, and move cursor to the next one">
                             <a href="#">Run</a></li>
                         <li id="run_cell_select_below" title="Run this cell, select below">
                             <a href="#">Run and Select Below</a></li>
                         <li id="run_cell_insert_below" title="Run this cell, insert below">
                             <a href="#">Run and Insert Below</a></li>
                         <li id="run_all_cells" title="Run all cells in the notebook">
                             <a href="#">Run All</a></li>
                         <li id="run_all_cells_above" title="Run all cells above (but not including) this cell">
                             <a href="#">Run All Above</a></li>
                         <li id="run_all_cells_below" title="Run this cell and all cells below it">
                             <a href="#">Run All Below</a></li>
                         <li class="divider"></li>
                         <li id="change_cell_type" class="dropdown-submenu"
                             title="All cells in the notebook have a cell type. By default, new cells are created as 'Code' cells">
                             <a href="#">Cell Type</a>
                             <ul class="dropdown-menu">
                               <li id="to_code"
                                   title="Contents will be sent to the kernel for execution, and output will display in the footer of cell">
                                   <a href="#">Code</a></li>
                               <li id="to_markdown"
                                   title="Contents will be rendered as HTML and serve as explanatory text">
                                   <a href="#">Markdown</a></li>
                               <li id="to_raw"
                                   title="Contents will pass through nbconvert unmodified">
                                   <a href="#">Raw NBConvert</a></li>
                               <li id="to_heading1"><a href="#">Heading 1</a></li>
                               <li id="to_heading2"><a href="#">Heading 2</a></li>
                               <li id="to_heading3"><a href="#">Heading 3</a></li>
                               <li id="to_heading4"><a href="#">Heading 4</a></li>
                               <li id="to_heading5"><a href="#">Heading 5</a></li>
                               <li id="to_heading6"><a href="#">Heading 6</a></li>
                             </ul>
                         </li>
                         <li class="divider"></li>
                         <li id="current_outputs" class="dropdown-submenu"><a href="#">Current Output</a>
                             <ul class="dropdown-menu">
                                 <li id="toggle_current_output"
                                     title="Hide/Show the output of the current cell">
                                     <a href="#">Toggle</a>
                                 </li>
                                 <li id="toggle_current_output_scroll"
                                     title="Scroll the output of the current cell">
                                     <a href="#">Toggle Scrolling</a>
                                 </li>
                                 <li id="clear_current_output"
                                     title="Clear the output of the current cell">
                                     <a href="#">Clear</a>
                                 </li>
                             </ul>
                         </li>
                         <li id="all_outputs" class="dropdown-submenu"><a href="#">All Output</a>
                             <ul class="dropdown-menu">
                                 <li id="toggle_all_output"
                                     title="Hide/Show the output of all cells">
                                     <a href="#">Toggle</a>
                                 </li>
                                 <li id="toggle_all_output_scroll"
                                     title="Scroll the output of all cells">
                                     <a href="#">Toggle Scrolling</a>
                                 </li>
                                 <li id="clear_all_output"
                                     title="Clear the output of all cells">
                                     <a href="#">Clear</a>
                                 </li>
                             </ul>
                         </li>
                     </ul>
                 </li>
                 <li class="dropdown"><a href="#" class="dropdown-toggle" data-toggle="dropdown">Kernel</a>
                     <ul id="kernel_menu" class="dropdown-menu">
                         <li id="int_kernel"
                             title="Send KeyboardInterrupt (CTRL-C) to the Kernel">
                             <a href="#">Interrupt</a></li>
                         <li id="restart_kernel"
                             title="Restart the Kernel">
                             <a href="#">Restart</a></li>
                     </ul>
                 </li>
                 <li class="dropdown"><a href="#" class="dropdown-toggle" data-toggle="dropdown">Help</a>
                     <ul  id="help_menu" class="dropdown-menu">
                         <li id="notebook_tour" title="A quick tour of the notebook user interface"><a href="#">User Interface Tour</a></li>
                         <li id="keyboard_shortcuts" title="Opens a tooltip with all keyboard shortcuts"><a href="#">Keyboard Shortcuts</a></li>
                         <li class="divider"></li>
                         {% set
                             sections = (
                                 (
                                     ("http://ipython.org/documentation.html","IPython Help",True),
                                     ("http://nbviewer.ipython.org/github/ipython/ipython/tree/2.x/examples/Index.ipynb", "Notebook Help", True),
                                 ),(
                                     ("http://docs.python.org","Python",True),
                             ("http://help.github.com/articles/github-flavored-markdown","Markdown",True),
                                     ("http://docs.scipy.org/doc/numpy/reference/","NumPy",True),
                                     ("http://docs.scipy.org/doc/scipy/reference/","SciPy",True),
                                     ("http://matplotlib.org/contents.html","Matplotlib",True),
                                     ("http://docs.sympy.org/latest/index.html","SymPy",True),
                                     ("http://pandas.pydata.org/pandas-docs/stable/","pandas", True)
                                 )
                             )
                         %}
 
                         {% for helplinks in sections %}
                             {% for link in helplinks %}
                                 <li><a href="{{link[0]}}" {{'target="_blank" title="Opens in a new window"' if link[2]}}>
                                 {{'<i class="icon-external-link menu-icon pull-right"></i>' if link[2]}}
                                 {{link[1]}}
                                 </a></li>
                             {% endfor %}
                             {% if not loop.last %}
                                 <li class="divider"></li>
                             {% endif %}
                         {% endfor %}
                         </li>
                     </ul>
                 </li>
             </ul>
             <ul class="nav navbar-nav navbar-right">
                 <div id="kernel_indicator">
                    <i id="kernel_indicator_icon"></i>
                 </div>
                 <div id="modal_indicator">
                    <i id="modal_indicator_icon"></i>
                 </div>
                 <div id="notification_area"></div>
             </ul>
         </div>
     </div>
 </div>
 <div id="maintoolbar" class="navbar">
   <div class="toolbar-inner navbar-inner navbar-nobg">
     <div id="maintoolbar-container" class="container"></div>
   </div>
 </div>
 </div>
 
 <div id="ipython-main-app">
 
     <div id="notebook_panel">
         <div id="notebook"></div>
         <div id="pager_splitter"></div>
         <div id="pager">
             <div id='pager_button_area'>
             </div>
             <div id="pager-container" class="container"></div>
         </div>
     </div>
 
 </div>
 <div id='tooltip' class='ipython_tooltip' style='display:none'></div>
 
 
 {% endblock %}
 
 
 {% block script %}
 {{super()}}
 
 <script src="{{ static_url("components/codemirror/lib/codemirror.js") }}" charset="utf-8"></script>
 <script type="text/javascript">
     CodeMirror.modeURL = "{{ static_url("components/codemirror/mode/%N/%N.js", include_version=False) }}";
 </script>
 <script src="{{ static_url("components/codemirror/addon/mode/loadmode.js") }}" charset="utf-8"></script>
 <script src="{{ static_url("components/codemirror/addon/mode/multiplex.js") }}" charset="utf-8"></script>
 <script src="{{ static_url("components/codemirror/addon/mode/overlay.js") }}" charset="utf-8"></script>
 <script src="{{ static_url("components/codemirror/addon/edit/matchbrackets.js") }}" charset="utf-8"></script>
 <script src="{{ static_url("components/codemirror/addon/edit/closebrackets.js") }}" charset="utf-8"></script>
 <script src="{{ static_url("components/codemirror/addon/comment/comment.js") }}" charset="utf-8"></script>
 <script src="{{ static_url("components/codemirror/mode/htmlmixed/htmlmixed.js") }}" charset="utf-8"></script>
 <script src="{{ static_url("components/codemirror/mode/xml/xml.js") }}" charset="utf-8"></script>
 <script src="{{ static_url("components/codemirror/mode/javascript/javascript.js") }}" charset="utf-8"></script>
 <script src="{{ static_url("components/codemirror/mode/css/css.js") }}" charset="utf-8"></script>
 <script src="{{ static_url("components/codemirror/mode/rst/rst.js") }}" charset="utf-8"></script>
 <script src="{{ static_url("components/codemirror/mode/markdown/markdown.js") }}" charset="utf-8"></script>
 <script src="{{ static_url("components/codemirror/mode/python/python.js") }}" charset="utf-8"></script>
 <script src="{{ static_url("notebook/js/codemirror-ipython.js") }}" charset="utf-8"></script>
 <script src="{{ static_url("notebook/js/codemirror-ipythongfm.js") }}" charset="utf-8"></script>
 
 <script src="{{ static_url("notebook/js/main.js") }}" charset="utf-8"></script>
 
 {% endblock %}