|
|
"""A notebook manager that uses the local file system for storage.
|
|
|
|
|
|
Authors:
|
|
|
|
|
|
* Brian Granger
|
|
|
* Zach Sailer
|
|
|
"""
|
|
|
|
|
|
#-----------------------------------------------------------------------------
|
|
|
# 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 io
|
|
|
import itertools
|
|
|
import os
|
|
|
import glob
|
|
|
import shutil
|
|
|
|
|
|
from tornado import web
|
|
|
|
|
|
from .nbmanager import NotebookManager
|
|
|
from IPython.nbformat import current
|
|
|
from IPython.utils.traitlets import Unicode, Dict, Bool, TraitError
|
|
|
from IPython.utils import tz
|
|
|
|
|
|
#-----------------------------------------------------------------------------
|
|
|
# Classes
|
|
|
#-----------------------------------------------------------------------------
|
|
|
|
|
|
class FileNotebookManager(NotebookManager):
|
|
|
|
|
|
save_script = Bool(False, config=True,
|
|
|
help="""Automatically create a Python script when saving the notebook.
|
|
|
|
|
|
For easier use of import, %run and %load across notebooks, a
|
|
|
<notebook-name>.py script will be created next to any
|
|
|
<notebook-name>.ipynb on each save. This can also be set with the
|
|
|
short `--script` flag.
|
|
|
"""
|
|
|
)
|
|
|
|
|
|
checkpoint_dir = Unicode(config=True,
|
|
|
help="""The location in which to keep notebook checkpoints
|
|
|
|
|
|
By default, it is notebook-dir/.ipynb_checkpoints
|
|
|
"""
|
|
|
)
|
|
|
def _checkpoint_dir_default(self):
|
|
|
return os.path.join(self.notebook_dir, '.ipynb_checkpoints')
|
|
|
|
|
|
def _checkpoint_dir_changed(self, name, old, new):
|
|
|
"""do a bit of validation of the checkpoint dir"""
|
|
|
if not os.path.isabs(new):
|
|
|
# If we receive a non-absolute path, make it absolute.
|
|
|
abs_new = os.path.abspath(new)
|
|
|
self.checkpoint_dir = abs_new
|
|
|
return
|
|
|
if os.path.exists(new) and not os.path.isdir(new):
|
|
|
raise TraitError("checkpoint dir %r is not a directory" % new)
|
|
|
if not os.path.exists(new):
|
|
|
self.log.info("Creating checkpoint dir %s", new)
|
|
|
try:
|
|
|
os.mkdir(new)
|
|
|
except:
|
|
|
raise TraitError("Couldn't create checkpoint dir %r" % new)
|
|
|
|
|
|
def get_notebook_names(self, path=''):
|
|
|
"""List all notebook names in the notebook dir and path."""
|
|
|
path = path.strip('/')
|
|
|
if not os.path.isdir(self.get_os_path(path=path)):
|
|
|
raise web.HTTPError(404, 'Directory not found: ' + path)
|
|
|
names = glob.glob(self.get_os_path('*'+self.filename_ext, path))
|
|
|
names = [os.path.basename(name)
|
|
|
for name in names]
|
|
|
return names
|
|
|
|
|
|
def increment_filename(self, basename, path='', ext='.ipynb'):
|
|
|
"""Return a non-used filename of the form basename<int>."""
|
|
|
path = path.strip('/')
|
|
|
for i in itertools.count():
|
|
|
name = u'{basename}{i}{ext}'.format(basename=basename, i=i, ext=ext)
|
|
|
os_path = self.get_os_path(name, path)
|
|
|
if not os.path.isfile(os_path):
|
|
|
break
|
|
|
return name
|
|
|
|
|
|
def path_exists(self, path):
|
|
|
"""Does the API-style path (directory) actually exist?
|
|
|
|
|
|
Parameters
|
|
|
----------
|
|
|
path : string
|
|
|
The path to check. This is an API path (`/` separated,
|
|
|
relative to base notebook-dir).
|
|
|
|
|
|
Returns
|
|
|
-------
|
|
|
exists : bool
|
|
|
Whether the path is indeed a directory.
|
|
|
"""
|
|
|
path = path.strip('/')
|
|
|
os_path = self.get_os_path(path=path)
|
|
|
return os.path.isdir(os_path)
|
|
|
|
|
|
def get_os_path(self, name=None, path=''):
|
|
|
"""Given a notebook name and a URL path, return its file system
|
|
|
path.
|
|
|
|
|
|
Parameters
|
|
|
----------
|
|
|
name : string
|
|
|
The name of a notebook file with the .ipynb extension
|
|
|
path : string
|
|
|
The relative URL path (with '/' as separator) to the named
|
|
|
notebook.
|
|
|
|
|
|
Returns
|
|
|
-------
|
|
|
path : string
|
|
|
A file system path that combines notebook_dir (location where
|
|
|
server started), the relative path, and the filename with the
|
|
|
current operating system's url.
|
|
|
"""
|
|
|
parts = path.strip('/').split('/')
|
|
|
parts = [p for p in parts if p != ''] # remove duplicate splits
|
|
|
if name is not None:
|
|
|
parts.append(name)
|
|
|
path = os.path.join(self.notebook_dir, *parts)
|
|
|
return path
|
|
|
|
|
|
def notebook_exists(self, name, path=''):
|
|
|
"""Returns a True if the notebook exists. Else, returns False.
|
|
|
|
|
|
Parameters
|
|
|
----------
|
|
|
name : string
|
|
|
The name of the notebook you are checking.
|
|
|
path : string
|
|
|
The relative path to the notebook (with '/' as separator)
|
|
|
|
|
|
Returns
|
|
|
-------
|
|
|
bool
|
|
|
"""
|
|
|
path = path.strip('/')
|
|
|
nbpath = self.get_os_path(name, path=path)
|
|
|
return os.path.isfile(nbpath)
|
|
|
|
|
|
def list_notebooks(self, path):
|
|
|
"""Returns a list of dictionaries that are the standard model
|
|
|
for all notebooks in the relative 'path'.
|
|
|
|
|
|
Parameters
|
|
|
----------
|
|
|
path : str
|
|
|
the URL path that describes the relative path for the
|
|
|
listed notebooks
|
|
|
|
|
|
Returns
|
|
|
-------
|
|
|
notebooks : list of dicts
|
|
|
a list of the notebook models without 'content'
|
|
|
"""
|
|
|
path = path.strip('/')
|
|
|
notebook_names = self.get_notebook_names(path)
|
|
|
notebooks = []
|
|
|
for name in notebook_names:
|
|
|
model = self.get_notebook_model(name, path, content=False)
|
|
|
notebooks.append(model)
|
|
|
notebooks = sorted(notebooks, key=lambda item: item['name'])
|
|
|
return notebooks
|
|
|
|
|
|
def get_notebook_model(self, name, path='', content=True):
|
|
|
""" Takes a path and name for a notebook and returns its model
|
|
|
|
|
|
Parameters
|
|
|
----------
|
|
|
name : str
|
|
|
the name of the notebook
|
|
|
path : str
|
|
|
the URL path that describes the relative path for
|
|
|
the notebook
|
|
|
|
|
|
Returns
|
|
|
-------
|
|
|
model : dict
|
|
|
the notebook model. If contents=True, returns the 'contents'
|
|
|
dict in the model as well.
|
|
|
"""
|
|
|
path = path.strip('/')
|
|
|
if not self.notebook_exists(name=name, path=path):
|
|
|
raise web.HTTPError(404, u'Notebook does not exist: %s' % name)
|
|
|
os_path = self.get_os_path(name, path)
|
|
|
info = os.stat(os_path)
|
|
|
last_modified = tz.utcfromtimestamp(info.st_mtime)
|
|
|
created = tz.utcfromtimestamp(info.st_ctime)
|
|
|
# Create the notebook model.
|
|
|
model ={}
|
|
|
model['name'] = name
|
|
|
model['path'] = path
|
|
|
model['last_modified'] = last_modified
|
|
|
model['created'] = created
|
|
|
if content:
|
|
|
with io.open(os_path, 'r', encoding='utf-8') as f:
|
|
|
try:
|
|
|
nb = current.read(f, u'json')
|
|
|
except Exception as e:
|
|
|
raise web.HTTPError(400, u"Unreadable Notebook: %s %s" % (os_path, e))
|
|
|
self.mark_trusted_cells(nb, path, name)
|
|
|
model['content'] = nb
|
|
|
return model
|
|
|
|
|
|
def save_notebook_model(self, model, name='', path=''):
|
|
|
"""Save the notebook model and return the model with no content."""
|
|
|
path = path.strip('/')
|
|
|
|
|
|
if 'content' not in model:
|
|
|
raise web.HTTPError(400, u'No notebook JSON data provided')
|
|
|
|
|
|
# One checkpoint should always exist
|
|
|
if self.notebook_exists(name, path) and not self.list_checkpoints(name, path):
|
|
|
self.create_checkpoint(name, path)
|
|
|
|
|
|
new_path = model.get('path', path).strip('/')
|
|
|
new_name = model.get('name', name)
|
|
|
|
|
|
if path != new_path or name != new_name:
|
|
|
self.rename_notebook(name, path, new_name, new_path)
|
|
|
|
|
|
# Save the notebook file
|
|
|
os_path = self.get_os_path(new_name, new_path)
|
|
|
nb = current.to_notebook_json(model['content'])
|
|
|
|
|
|
self.check_and_sign(nb, new_path, new_name)
|
|
|
|
|
|
if 'name' in nb['metadata']:
|
|
|
nb['metadata']['name'] = u''
|
|
|
try:
|
|
|
self.log.debug("Autosaving notebook %s", os_path)
|
|
|
with io.open(os_path, 'w', encoding='utf-8') as f:
|
|
|
current.write(nb, f, u'json')
|
|
|
except Exception as e:
|
|
|
raise web.HTTPError(400, u'Unexpected error while autosaving notebook: %s %s' % (os_path, e))
|
|
|
|
|
|
# Save .py script as well
|
|
|
if self.save_script:
|
|
|
py_path = os.path.splitext(os_path)[0] + '.py'
|
|
|
self.log.debug("Writing script %s", py_path)
|
|
|
try:
|
|
|
with io.open(py_path, 'w', encoding='utf-8') as f:
|
|
|
current.write(nb, f, u'py')
|
|
|
except Exception as e:
|
|
|
raise web.HTTPError(400, u'Unexpected error while saving notebook as script: %s %s' % (py_path, e))
|
|
|
|
|
|
model = self.get_notebook_model(new_name, new_path, content=False)
|
|
|
return model
|
|
|
|
|
|
def update_notebook_model(self, model, name, path=''):
|
|
|
"""Update the notebook's path and/or name"""
|
|
|
path = path.strip('/')
|
|
|
new_name = model.get('name', name)
|
|
|
new_path = model.get('path', path).strip('/')
|
|
|
if path != new_path or name != new_name:
|
|
|
self.rename_notebook(name, path, new_name, new_path)
|
|
|
model = self.get_notebook_model(new_name, new_path, content=False)
|
|
|
return model
|
|
|
|
|
|
def delete_notebook_model(self, name, path=''):
|
|
|
"""Delete notebook by name and path."""
|
|
|
path = path.strip('/')
|
|
|
os_path = self.get_os_path(name, path)
|
|
|
if not os.path.isfile(os_path):
|
|
|
raise web.HTTPError(404, u'Notebook does not exist: %s' % os_path)
|
|
|
|
|
|
# clear checkpoints
|
|
|
for checkpoint in self.list_checkpoints(name, path):
|
|
|
checkpoint_id = checkpoint['id']
|
|
|
cp_path = self.get_checkpoint_path(checkpoint_id, name, path)
|
|
|
if os.path.isfile(cp_path):
|
|
|
self.log.debug("Unlinking checkpoint %s", cp_path)
|
|
|
os.unlink(cp_path)
|
|
|
|
|
|
self.log.debug("Unlinking notebook %s", os_path)
|
|
|
os.unlink(os_path)
|
|
|
|
|
|
def rename_notebook(self, old_name, old_path, new_name, new_path):
|
|
|
"""Rename a notebook."""
|
|
|
old_path = old_path.strip('/')
|
|
|
new_path = new_path.strip('/')
|
|
|
if new_name == old_name and new_path == old_path:
|
|
|
return
|
|
|
|
|
|
new_os_path = self.get_os_path(new_name, new_path)
|
|
|
old_os_path = self.get_os_path(old_name, old_path)
|
|
|
|
|
|
# Should we proceed with the move?
|
|
|
if os.path.isfile(new_os_path):
|
|
|
raise web.HTTPError(409, u'Notebook with name already exists: %s' % new_os_path)
|
|
|
if self.save_script:
|
|
|
old_py_path = os.path.splitext(old_os_path)[0] + '.py'
|
|
|
new_py_path = os.path.splitext(new_os_path)[0] + '.py'
|
|
|
if os.path.isfile(new_py_path):
|
|
|
raise web.HTTPError(409, u'Python script with name already exists: %s' % new_py_path)
|
|
|
|
|
|
# Move the notebook file
|
|
|
try:
|
|
|
os.rename(old_os_path, new_os_path)
|
|
|
except Exception as e:
|
|
|
raise web.HTTPError(500, u'Unknown error renaming notebook: %s %s' % (old_os_path, e))
|
|
|
|
|
|
# Move the checkpoints
|
|
|
old_checkpoints = self.list_checkpoints(old_name, old_path)
|
|
|
for cp in old_checkpoints:
|
|
|
checkpoint_id = cp['id']
|
|
|
old_cp_path = self.get_checkpoint_path(checkpoint_id, old_name, old_path)
|
|
|
new_cp_path = self.get_checkpoint_path(checkpoint_id, new_name, new_path)
|
|
|
if os.path.isfile(old_cp_path):
|
|
|
self.log.debug("Renaming checkpoint %s -> %s", old_cp_path, new_cp_path)
|
|
|
os.rename(old_cp_path, new_cp_path)
|
|
|
|
|
|
# Move the .py script
|
|
|
if self.save_script:
|
|
|
os.rename(old_py_path, new_py_path)
|
|
|
|
|
|
# Checkpoint-related utilities
|
|
|
|
|
|
def get_checkpoint_path(self, checkpoint_id, name, path=''):
|
|
|
"""find the path to a checkpoint"""
|
|
|
path = path.strip('/')
|
|
|
basename, _ = os.path.splitext(name)
|
|
|
filename = u"{name}-{checkpoint_id}{ext}".format(
|
|
|
name=basename,
|
|
|
checkpoint_id=checkpoint_id,
|
|
|
ext=self.filename_ext,
|
|
|
)
|
|
|
cp_path = os.path.join(path, self.checkpoint_dir, filename)
|
|
|
return cp_path
|
|
|
|
|
|
def get_checkpoint_model(self, checkpoint_id, name, path=''):
|
|
|
"""construct the info dict for a given checkpoint"""
|
|
|
path = path.strip('/')
|
|
|
cp_path = self.get_checkpoint_path(checkpoint_id, name, path)
|
|
|
stats = os.stat(cp_path)
|
|
|
last_modified = tz.utcfromtimestamp(stats.st_mtime)
|
|
|
info = dict(
|
|
|
id = checkpoint_id,
|
|
|
last_modified = last_modified,
|
|
|
)
|
|
|
return info
|
|
|
|
|
|
# public checkpoint API
|
|
|
|
|
|
def create_checkpoint(self, name, path=''):
|
|
|
"""Create a checkpoint from the current state of a notebook"""
|
|
|
path = path.strip('/')
|
|
|
nb_path = self.get_os_path(name, path)
|
|
|
# only the one checkpoint ID:
|
|
|
checkpoint_id = u"checkpoint"
|
|
|
cp_path = self.get_checkpoint_path(checkpoint_id, name, path)
|
|
|
self.log.debug("creating checkpoint for notebook %s", name)
|
|
|
if not os.path.exists(self.checkpoint_dir):
|
|
|
os.mkdir(self.checkpoint_dir)
|
|
|
shutil.copy2(nb_path, cp_path)
|
|
|
|
|
|
# return the checkpoint info
|
|
|
return self.get_checkpoint_model(checkpoint_id, name, path)
|
|
|
|
|
|
def list_checkpoints(self, name, path=''):
|
|
|
"""list the checkpoints for a given notebook
|
|
|
|
|
|
This notebook manager currently only supports one checkpoint per notebook.
|
|
|
"""
|
|
|
path = path.strip('/')
|
|
|
checkpoint_id = "checkpoint"
|
|
|
path = self.get_checkpoint_path(checkpoint_id, name, path)
|
|
|
if not os.path.exists(path):
|
|
|
return []
|
|
|
else:
|
|
|
return [self.get_checkpoint_model(checkpoint_id, name, path)]
|
|
|
|
|
|
|
|
|
def restore_checkpoint(self, checkpoint_id, name, path=''):
|
|
|
"""restore a notebook to a checkpointed state"""
|
|
|
path = path.strip('/')
|
|
|
self.log.info("restoring Notebook %s from checkpoint %s", name, checkpoint_id)
|
|
|
nb_path = self.get_os_path(name, path)
|
|
|
cp_path = self.get_checkpoint_path(checkpoint_id, name, path)
|
|
|
if not os.path.isfile(cp_path):
|
|
|
self.log.debug("checkpoint file does not exist: %s", cp_path)
|
|
|
raise web.HTTPError(404,
|
|
|
u'Notebook checkpoint does not exist: %s-%s' % (name, checkpoint_id)
|
|
|
)
|
|
|
# ensure notebook is readable (never restore from an unreadable notebook)
|
|
|
with io.open(cp_path, 'r', encoding='utf-8') as f:
|
|
|
nb = current.read(f, u'json')
|
|
|
shutil.copy2(cp_path, nb_path)
|
|
|
self.log.debug("copying %s -> %s", cp_path, nb_path)
|
|
|
|
|
|
def delete_checkpoint(self, checkpoint_id, name, path=''):
|
|
|
"""delete a notebook's checkpoint"""
|
|
|
path = path.strip('/')
|
|
|
cp_path = self.get_checkpoint_path(checkpoint_id, name, path)
|
|
|
if not os.path.isfile(cp_path):
|
|
|
raise web.HTTPError(404,
|
|
|
u'Notebook checkpoint does not exist: %s%s-%s' % (path, name, checkpoint_id)
|
|
|
)
|
|
|
self.log.debug("unlinking %s", cp_path)
|
|
|
os.unlink(cp_path)
|
|
|
|
|
|
def info_string(self):
|
|
|
return "Serving notebooks from local directory: %s" % self.notebook_dir
|
|
|
|
