|
|
"""Base Tornado handlers for the notebook.
|
|
|
|
|
|
Authors:
|
|
|
|
|
|
* Brian Granger
|
|
|
"""
|
|
|
|
|
|
#-----------------------------------------------------------------------------
|
|
|
# Copyright (C) 2011 The IPython Development Team
|
|
|
#
|
|
|
# Distributed under the terms of the BSD License. The full license is in
|
|
|
# the file COPYING, distributed as part of this software.
|
|
|
#-----------------------------------------------------------------------------
|
|
|
|
|
|
#-----------------------------------------------------------------------------
|
|
|
# Imports
|
|
|
#-----------------------------------------------------------------------------
|
|
|
|
|
|
|
|
|
import datetime
|
|
|
import email.utils
|
|
|
import hashlib
|
|
|
import logging
|
|
|
import mimetypes
|
|
|
import os
|
|
|
import stat
|
|
|
import threading
|
|
|
|
|
|
import logging
|
|
|
|
|
|
from tornado import web
|
|
|
from tornado import websocket
|
|
|
|
|
|
try:
|
|
|
from tornado.log import app_log
|
|
|
except ImportError:
|
|
|
app_log = logging.getLogger()
|
|
|
|
|
|
from IPython.config import Application
|
|
|
from IPython.external.decorator import decorator
|
|
|
from IPython.utils.path import filefind
|
|
|
|
|
|
#-----------------------------------------------------------------------------
|
|
|
# Monkeypatch for Tornado <= 2.1.1 - Remove when no longer necessary!
|
|
|
#-----------------------------------------------------------------------------
|
|
|
|
|
|
# Google Chrome, as of release 16, changed its websocket protocol number. The
|
|
|
# parts tornado cares about haven't really changed, so it's OK to continue
|
|
|
# accepting Chrome connections, but as of Tornado 2.1.1 (the currently released
|
|
|
# version as of Oct 30/2011) the version check fails, see the issue report:
|
|
|
|
|
|
# https://github.com/facebook/tornado/issues/385
|
|
|
|
|
|
# This issue has been fixed in Tornado post 2.1.1:
|
|
|
|
|
|
# https://github.com/facebook/tornado/commit/84d7b458f956727c3b0d6710
|
|
|
|
|
|
# Here we manually apply the same patch as above so that users of IPython can
|
|
|
# continue to work with an officially released Tornado. We make the
|
|
|
# monkeypatch version check as narrow as possible to limit its effects; once
|
|
|
# Tornado 2.1.1 is no longer found in the wild we'll delete this code.
|
|
|
|
|
|
import tornado
|
|
|
|
|
|
if tornado.version_info <= (2,1,1):
|
|
|
|
|
|
def _execute(self, transforms, *args, **kwargs):
|
|
|
from tornado.websocket import WebSocketProtocol8, WebSocketProtocol76
|
|
|
|
|
|
self.open_args = args
|
|
|
self.open_kwargs = kwargs
|
|
|
|
|
|
# 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 self.request.headers.get("Sec-WebSocket-Version") in ("7", "8", "13"):
|
|
|
self.ws_connection = WebSocketProtocol8(self)
|
|
|
self.ws_connection.accept_connection()
|
|
|
|
|
|
elif self.request.headers.get("Sec-WebSocket-Version"):
|
|
|
self.stream.write(tornado.escape.utf8(
|
|
|
"HTTP/1.1 426 Upgrade Required\r\n"
|
|
|
"Sec-WebSocket-Version: 8\r\n\r\n"))
|
|
|
self.stream.close()
|
|
|
|
|
|
else:
|
|
|
self.ws_connection = WebSocketProtocol76(self)
|
|
|
self.ws_connection.accept_connection()
|
|
|
|
|
|
websocket.WebSocketHandler._execute = _execute
|
|
|
del _execute
|
|
|
|
|
|
#-----------------------------------------------------------------------------
|
|
|
# Decorator for disabling read-only handlers
|
|
|
#-----------------------------------------------------------------------------
|
|
|
|
|
|
@decorator
|
|
|
def not_if_readonly(f, self, *args, **kwargs):
|
|
|
if self.settings.get('read_only', False):
|
|
|
raise web.HTTPError(403, "Notebook server is read-only")
|
|
|
else:
|
|
|
return f(self, *args, **kwargs)
|
|
|
|
|
|
@decorator
|
|
|
def authenticate_unless_readonly(f, self, *args, **kwargs):
|
|
|
"""authenticate this page *unless* readonly view is active.
|
|
|
|
|
|
In read-only mode, the notebook list and print view should
|
|
|
be accessible without authentication.
|
|
|
"""
|
|
|
|
|
|
@web.authenticated
|
|
|
def auth_f(self, *args, **kwargs):
|
|
|
return f(self, *args, **kwargs)
|
|
|
|
|
|
if self.settings.get('read_only', False):
|
|
|
return f(self, *args, **kwargs)
|
|
|
else:
|
|
|
return auth_f(self, *args, **kwargs)
|
|
|
|
|
|
#-----------------------------------------------------------------------------
|
|
|
# Top-level handlers
|
|
|
#-----------------------------------------------------------------------------
|
|
|
|
|
|
class RequestHandler(web.RequestHandler):
|
|
|
"""RequestHandler with default variable setting."""
|
|
|
|
|
|
def render(*args, **kwargs):
|
|
|
kwargs.setdefault('message', '')
|
|
|
return web.RequestHandler.render(*args, **kwargs)
|
|
|
|
|
|
class AuthenticatedHandler(RequestHandler):
|
|
|
"""A RequestHandler with an authenticated user."""
|
|
|
|
|
|
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.read_only and not self.login_available:
|
|
|
user_id = 'anonymous'
|
|
|
return user_id
|
|
|
|
|
|
@property
|
|
|
def cookie_name(self):
|
|
|
return self.settings.get('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', ''))
|
|
|
|
|
|
@property
|
|
|
def read_only(self):
|
|
|
"""Is the notebook read-only?
|
|
|
|
|
|
"""
|
|
|
return self.settings.get('read_only', False)
|
|
|
|
|
|
|
|
|
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
|
|
|
|
|
|
@property
|
|
|
def use_less(self):
|
|
|
"""Use less instead of css in templates"""
|
|
|
return self.settings.get('use_less', False)
|
|
|
|
|
|
#---------------------------------------------------------------
|
|
|
# URLs
|
|
|
#---------------------------------------------------------------
|
|
|
|
|
|
@property
|
|
|
def ws_url(self):
|
|
|
"""websocket url matching the current request
|
|
|
|
|
|
turns http[s]://host[:port] into
|
|
|
ws[s]://host[:port]
|
|
|
"""
|
|
|
proto = self.request.protocol.replace('http', 'ws')
|
|
|
host = self.settings.get('websocket_host', '')
|
|
|
# default to config value
|
|
|
if host == '':
|
|
|
host = self.request.host # get from request
|
|
|
return "%s://%s" % (proto, host)
|
|
|
|
|
|
@property
|
|
|
def mathjax_url(self):
|
|
|
return self.settings.get('mathjax_url', '')
|
|
|
|
|
|
@property
|
|
|
def base_project_url(self):
|
|
|
return self.settings.get('base_project_url', '/')
|
|
|
|
|
|
@property
|
|
|
def base_kernel_url(self):
|
|
|
return self.settings.get('base_kernel_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 project(self):
|
|
|
return self.notebook_manager.notebook_dir
|
|
|
|
|
|
#---------------------------------------------------------------
|
|
|
# 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_project_url=self.base_project_url,
|
|
|
base_kernel_url=self.base_kernel_url,
|
|
|
read_only=self.read_only,
|
|
|
logged_in=self.logged_in,
|
|
|
login_available=self.login_available,
|
|
|
use_less=self.use_less,
|
|
|
)
|
|
|
|
|
|
class AuthenticatedFileHandler(IPythonHandler, web.StaticFileHandler):
|
|
|
"""static files should only be accessible when logged in"""
|
|
|
|
|
|
@authenticate_unless_readonly
|
|
|
def get(self, path):
|
|
|
return web.StaticFileHandler.get(self, path)
|
|
|
|
|
|
|
|
|
#-----------------------------------------------------------------------------
|
|
|
# File handler
|
|
|
#-----------------------------------------------------------------------------
|
|
|
|
|
|
# to minimize subclass changes:
|
|
|
HTTPError = web.HTTPError
|
|
|
|
|
|
class FileFindHandler(web.StaticFileHandler):
|
|
|
"""subclass of StaticFileHandler for serving files from a search path"""
|
|
|
|
|
|
_static_paths = {}
|
|
|
# _lock is needed for tornado < 2.2.0 compat
|
|
|
_lock = threading.Lock() # protects _static_hashes
|
|
|
|
|
|
def initialize(self, path, default_filename=None):
|
|
|
if isinstance(path, basestring):
|
|
|
path = [path]
|
|
|
self.roots = tuple(
|
|
|
os.path.abspath(os.path.expanduser(p)) + os.path.sep for p in path
|
|
|
)
|
|
|
self.default_filename = default_filename
|
|
|
|
|
|
@classmethod
|
|
|
def locate_file(cls, path, roots):
|
|
|
"""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:
|
|
|
# empty string should always give exists=False
|
|
|
return ''
|
|
|
|
|
|
# os.path.abspath strips a trailing /
|
|
|
# it needs to be temporarily added back for requests to root/
|
|
|
if not (abspath + os.path.sep).startswith(roots):
|
|
|
raise HTTPError(403, "%s is not in root static directory", path)
|
|
|
|
|
|
cls._static_paths[path] = abspath
|
|
|
return abspath
|
|
|
|
|
|
def get(self, path, include_body=True):
|
|
|
path = self.parse_url_path(path)
|
|
|
|
|
|
# begin subclass override
|
|
|
abspath = self.locate_file(path, self.roots)
|
|
|
# end subclass override
|
|
|
|
|
|
if os.path.isdir(abspath) and self.default_filename is not None:
|
|
|
# need to look at the request.path here for when path is empty
|
|
|
# but there is some prefix to the path that was already
|
|
|
# trimmed by the routing
|
|
|
if not self.request.path.endswith("/"):
|
|
|
self.redirect(self.request.path + "/")
|
|
|
return
|
|
|
abspath = os.path.join(abspath, self.default_filename)
|
|
|
if not os.path.exists(abspath):
|
|
|
raise HTTPError(404)
|
|
|
if not os.path.isfile(abspath):
|
|
|
raise HTTPError(403, "%s is not a file", path)
|
|
|
|
|
|
stat_result = os.stat(abspath)
|
|
|
modified = datetime.datetime.utcfromtimestamp(stat_result[stat.ST_MTIME])
|
|
|
|
|
|
self.set_header("Last-Modified", modified)
|
|
|
|
|
|
mime_type, encoding = mimetypes.guess_type(abspath)
|
|
|
if mime_type:
|
|
|
self.set_header("Content-Type", mime_type)
|
|
|
|
|
|
cache_time = self.get_cache_time(path, modified, mime_type)
|
|
|
|
|
|
if cache_time > 0:
|
|
|
self.set_header("Expires", datetime.datetime.utcnow() + \
|
|
|
datetime.timedelta(seconds=cache_time))
|
|
|
self.set_header("Cache-Control", "max-age=" + str(cache_time))
|
|
|
else:
|
|
|
self.set_header("Cache-Control", "public")
|
|
|
|
|
|
self.set_extra_headers(path)
|
|
|
|
|
|
# Check the If-Modified-Since, and don't send the result if the
|
|
|
# content has not been modified
|
|
|
ims_value = self.request.headers.get("If-Modified-Since")
|
|
|
if ims_value is not None:
|
|
|
date_tuple = email.utils.parsedate(ims_value)
|
|
|
if_since = datetime.datetime(*date_tuple[:6])
|
|
|
if if_since >= modified:
|
|
|
self.set_status(304)
|
|
|
return
|
|
|
|
|
|
with open(abspath, "rb") as file:
|
|
|
data = file.read()
|
|
|
hasher = hashlib.sha1()
|
|
|
hasher.update(data)
|
|
|
self.set_header("Etag", '"%s"' % hasher.hexdigest())
|
|
|
if include_body:
|
|
|
self.write(data)
|
|
|
else:
|
|
|
assert self.request.method == "HEAD"
|
|
|
self.set_header("Content-Length", len(data))
|
|
|
|
|
|
@classmethod
|
|
|
def get_version(cls, settings, path):
|
|
|
"""Generate the version string to be used in static URLs.
|
|
|
|
|
|
This method may be overridden in subclasses (but note that it
|
|
|
is a class method rather than a static method). The default
|
|
|
implementation uses a hash of the file's contents.
|
|
|
|
|
|
``settings`` is the `Application.settings` dictionary and ``path``
|
|
|
is the relative location of the requested asset on the filesystem.
|
|
|
The returned value should be a string, or ``None`` if no version
|
|
|
could be determined.
|
|
|
"""
|
|
|
# begin subclass override:
|
|
|
static_paths = settings['static_path']
|
|
|
if isinstance(static_paths, basestring):
|
|
|
static_paths = [static_paths]
|
|
|
roots = tuple(
|
|
|
os.path.abspath(os.path.expanduser(p)) + os.path.sep for p in static_paths
|
|
|
)
|
|
|
|
|
|
try:
|
|
|
abs_path = filefind(path, roots)
|
|
|
except IOError:
|
|
|
app_log.error("Could not find static file %r", path)
|
|
|
return None
|
|
|
|
|
|
# end subclass override
|
|
|
|
|
|
with cls._lock:
|
|
|
hashes = cls._static_hashes
|
|
|
if abs_path not in hashes:
|
|
|
try:
|
|
|
f = open(abs_path, "rb")
|
|
|
hashes[abs_path] = hashlib.md5(f.read()).hexdigest()
|
|
|
f.close()
|
|
|
except Exception:
|
|
|
app_log.error("Could not open static file %r", path)
|
|
|
hashes[abs_path] = None
|
|
|
hsh = hashes.get(abs_path)
|
|
|
if hsh:
|
|
|
return hsh[:5]
|
|
|
return None
|
|
|
|
|
|
|
|
|
def parse_url_path(self, url_path):
|
|
|
"""Converts a static URL path into a filesystem path.
|
|
|
|
|
|
``url_path`` is the path component of the URL with
|
|
|
``static_url_prefix`` removed. The return value should be
|
|
|
filesystem path relative to ``static_path``.
|
|
|
"""
|
|
|
if os.path.sep != "/":
|
|
|
url_path = url_path.replace("/", os.path.sep)
|
|
|
return url_path
|
|
|
|
|
|
#-----------------------------------------------------------------------------
|
|
|
# URL to handler mappings
|
|
|
#-----------------------------------------------------------------------------
|
|
|
|
|
|
|
|
|
default_handlers = []
|
|
|
|
