|
|
"""A base class for contents managers."""
|
|
|
|
|
|
# Copyright (c) IPython Development Team.
|
|
|
# Distributed under the terms of the Modified BSD License.
|
|
|
|
|
|
from fnmatch import fnmatch
|
|
|
import itertools
|
|
|
import json
|
|
|
import os
|
|
|
import re
|
|
|
|
|
|
from tornado.web import HTTPError
|
|
|
|
|
|
from IPython.config.configurable import LoggingConfigurable
|
|
|
from IPython.nbformat import sign, validate, ValidationError
|
|
|
from IPython.nbformat.v4 import new_notebook
|
|
|
from IPython.utils.traitlets import Instance, Unicode, List
|
|
|
|
|
|
copy_pat = re.compile(r'\-Copy\d*\.')
|
|
|
|
|
|
class ContentsManager(LoggingConfigurable):
|
|
|
"""Base class for serving files and directories.
|
|
|
|
|
|
This serves any text or binary file,
|
|
|
as well as directories,
|
|
|
with special handling for JSON notebook documents.
|
|
|
|
|
|
Most APIs take a path argument,
|
|
|
which is always an API-style unicode path,
|
|
|
and always refers to a directory.
|
|
|
|
|
|
- unicode, not url-escaped
|
|
|
- '/'-separated
|
|
|
- leading and trailing '/' will be stripped
|
|
|
- if unspecified, path defaults to '',
|
|
|
indicating the root path.
|
|
|
|
|
|
"""
|
|
|
|
|
|
notary = Instance(sign.NotebookNotary)
|
|
|
def _notary_default(self):
|
|
|
return sign.NotebookNotary(parent=self)
|
|
|
|
|
|
hide_globs = List(Unicode, [
|
|
|
u'__pycache__', '*.pyc', '*.pyo',
|
|
|
'.DS_Store', '*.so', '*.dylib', '*~',
|
|
|
], config=True, help="""
|
|
|
Glob patterns to hide in file and directory listings.
|
|
|
""")
|
|
|
|
|
|
untitled_notebook = Unicode("Untitled", config=True,
|
|
|
help="The base name used when creating untitled notebooks."
|
|
|
)
|
|
|
|
|
|
untitled_file = Unicode("untitled", config=True,
|
|
|
help="The base name used when creating untitled files."
|
|
|
)
|
|
|
|
|
|
untitled_directory = Unicode("Untitled Folder", config=True,
|
|
|
help="The base name used when creating untitled directories."
|
|
|
)
|
|
|
|
|
|
# ContentsManager API part 1: methods that must be
|
|
|
# implemented in subclasses.
|
|
|
|
|
|
def dir_exists(self, path):
|
|
|
"""Does the API-style path (directory) actually exist?
|
|
|
|
|
|
Like os.path.isdir
|
|
|
|
|
|
Override this method in subclasses.
|
|
|
|
|
|
Parameters
|
|
|
----------
|
|
|
path : string
|
|
|
The path to check
|
|
|
|
|
|
Returns
|
|
|
-------
|
|
|
exists : bool
|
|
|
Whether the path does indeed exist.
|
|
|
"""
|
|
|
raise NotImplementedError
|
|
|
|
|
|
def is_hidden(self, path):
|
|
|
"""Does the API style path correspond to a hidden directory or file?
|
|
|
|
|
|
Parameters
|
|
|
----------
|
|
|
path : string
|
|
|
The path to check. This is an API path (`/` separated,
|
|
|
relative to root dir).
|
|
|
|
|
|
Returns
|
|
|
-------
|
|
|
hidden : bool
|
|
|
Whether the path is hidden.
|
|
|
|
|
|
"""
|
|
|
raise NotImplementedError
|
|
|
|
|
|
def file_exists(self, path=''):
|
|
|
"""Does a file exist at the given path?
|
|
|
|
|
|
Like os.path.isfile
|
|
|
|
|
|
Override this method in subclasses.
|
|
|
|
|
|
Parameters
|
|
|
----------
|
|
|
name : string
|
|
|
The name of the file you are checking.
|
|
|
path : string
|
|
|
The relative path to the file's directory (with '/' as separator)
|
|
|
|
|
|
Returns
|
|
|
-------
|
|
|
exists : bool
|
|
|
Whether the file exists.
|
|
|
"""
|
|
|
raise NotImplementedError('must be implemented in a subclass')
|
|
|
|
|
|
def exists(self, path):
|
|
|
"""Does a file or directory exist at the given path?
|
|
|
|
|
|
Like os.path.exists
|
|
|
|
|
|
Parameters
|
|
|
----------
|
|
|
path : string
|
|
|
The relative path to the file's directory (with '/' as separator)
|
|
|
|
|
|
Returns
|
|
|
-------
|
|
|
exists : bool
|
|
|
Whether the target exists.
|
|
|
"""
|
|
|
return self.file_exists(path) or self.dir_exists(path)
|
|
|
|
|
|
def get(self, path, content=True, type_=None, format=None):
|
|
|
"""Get the model of a file or directory with or without content."""
|
|
|
raise NotImplementedError('must be implemented in a subclass')
|
|
|
|
|
|
def save(self, model, path):
|
|
|
"""Save the file or directory and return the model with no content."""
|
|
|
raise NotImplementedError('must be implemented in a subclass')
|
|
|
|
|
|
def update(self, model, path):
|
|
|
"""Update the file or directory and return the model with no content.
|
|
|
|
|
|
For use in PATCH requests, to enable renaming a file without
|
|
|
re-uploading its contents. Only used for renaming at the moment.
|
|
|
"""
|
|
|
raise NotImplementedError('must be implemented in a subclass')
|
|
|
|
|
|
def delete(self, path):
|
|
|
"""Delete file or directory by path."""
|
|
|
raise NotImplementedError('must be implemented in a subclass')
|
|
|
|
|
|
def create_checkpoint(self, path):
|
|
|
"""Create a checkpoint of the current state of a file
|
|
|
|
|
|
Returns a checkpoint_id for the new checkpoint.
|
|
|
"""
|
|
|
raise NotImplementedError("must be implemented in a subclass")
|
|
|
|
|
|
def list_checkpoints(self, path):
|
|
|
"""Return a list of checkpoints for a given file"""
|
|
|
return []
|
|
|
|
|
|
def restore_checkpoint(self, checkpoint_id, path):
|
|
|
"""Restore a file from one of its checkpoints"""
|
|
|
raise NotImplementedError("must be implemented in a subclass")
|
|
|
|
|
|
def delete_checkpoint(self, checkpoint_id, path):
|
|
|
"""delete a checkpoint for a file"""
|
|
|
raise NotImplementedError("must be implemented in a subclass")
|
|
|
|
|
|
# ContentsManager API part 2: methods that have useable default
|
|
|
# implementations, but can be overridden in subclasses.
|
|
|
|
|
|
def info_string(self):
|
|
|
return "Serving contents"
|
|
|
|
|
|
def get_kernel_path(self, path, model=None):
|
|
|
"""Return the API path for the kernel
|
|
|
|
|
|
KernelManagers can turn this value into a filesystem path,
|
|
|
or ignore it altogether.
|
|
|
"""
|
|
|
return path
|
|
|
|
|
|
def increment_filename(self, filename, path='', insert=''):
|
|
|
"""Increment a filename until it is unique.
|
|
|
|
|
|
Parameters
|
|
|
----------
|
|
|
filename : unicode
|
|
|
The name of a file, including extension
|
|
|
path : unicode
|
|
|
The API path of the target's directory
|
|
|
|
|
|
Returns
|
|
|
-------
|
|
|
name : unicode
|
|
|
A filename that is unique, based on the input filename.
|
|
|
"""
|
|
|
path = path.strip('/')
|
|
|
basename, ext = os.path.splitext(filename)
|
|
|
for i in itertools.count():
|
|
|
if i:
|
|
|
insert_i = '{}{}'.format(insert, i)
|
|
|
else:
|
|
|
insert_i = ''
|
|
|
name = u'{basename}{insert}{ext}'.format(basename=basename,
|
|
|
insert=insert_i, ext=ext)
|
|
|
if not self.exists(u'{}/{}'.format(path, name)):
|
|
|
break
|
|
|
return name
|
|
|
|
|
|
def validate_notebook_model(self, model):
|
|
|
"""Add failed-validation message to model"""
|
|
|
try:
|
|
|
validate(model['content'])
|
|
|
except ValidationError as e:
|
|
|
model['message'] = u'Notebook Validation failed: {}:\n{}'.format(
|
|
|
e.message, json.dumps(e.instance, indent=1, default=lambda obj: '<UNKNOWN>'),
|
|
|
)
|
|
|
return model
|
|
|
|
|
|
def new_untitled(self, path='', type='', ext=''):
|
|
|
"""Create a new untitled file or directory in path
|
|
|
|
|
|
path must be a directory
|
|
|
|
|
|
File extension can be specified.
|
|
|
|
|
|
Use `new` to create files with a fully specified path (including filename).
|
|
|
"""
|
|
|
path = path.strip('/')
|
|
|
if not self.dir_exists(path):
|
|
|
raise HTTPError(404, 'No such directory: %s' % path)
|
|
|
|
|
|
model = {}
|
|
|
if type:
|
|
|
model['type'] = type
|
|
|
|
|
|
if ext == '.ipynb':
|
|
|
model.setdefault('type', 'notebook')
|
|
|
else:
|
|
|
model.setdefault('type', 'file')
|
|
|
|
|
|
insert = ''
|
|
|
if model['type'] == 'directory':
|
|
|
untitled = self.untitled_directory
|
|
|
insert = ' '
|
|
|
elif model['type'] == 'notebook':
|
|
|
untitled = self.untitled_notebook
|
|
|
ext = '.ipynb'
|
|
|
elif model['type'] == 'file':
|
|
|
untitled = self.untitled_file
|
|
|
else:
|
|
|
raise HTTPError(400, "Unexpected model type: %r" % model['type'])
|
|
|
|
|
|
name = self.increment_filename(untitled + ext, path, insert=insert)
|
|
|
path = u'{0}/{1}'.format(path, name)
|
|
|
return self.new(model, path)
|
|
|
|
|
|
def new(self, model=None, path=''):
|
|
|
"""Create a new file or directory and return its model with no content.
|
|
|
|
|
|
To create a new untitled entity in a directory, use `new_untitled`.
|
|
|
"""
|
|
|
path = path.strip('/')
|
|
|
if model is None:
|
|
|
model = {}
|
|
|
|
|
|
if path.endswith('.ipynb'):
|
|
|
model.setdefault('type', 'notebook')
|
|
|
else:
|
|
|
model.setdefault('type', 'file')
|
|
|
|
|
|
# no content, not a directory, so fill out new-file model
|
|
|
if 'content' not in model and model['type'] != 'directory':
|
|
|
if model['type'] == 'notebook':
|
|
|
model['content'] = new_notebook()
|
|
|
model['format'] = 'json'
|
|
|
else:
|
|
|
model['content'] = ''
|
|
|
model['type'] = 'file'
|
|
|
model['format'] = 'text'
|
|
|
|
|
|
model = self.save(model, path)
|
|
|
return model
|
|
|
|
|
|
def copy(self, from_path, to_path=None):
|
|
|
"""Copy an existing file and return its new model.
|
|
|
|
|
|
If to_path not specified, it will be the parent directory of from_path.
|
|
|
If to_path is a directory, filename will increment `from_path-Copy#.ext`.
|
|
|
|
|
|
from_path must be a full path to a file.
|
|
|
"""
|
|
|
path = from_path.strip('/')
|
|
|
if '/' in path:
|
|
|
from_dir, from_name = path.rsplit('/', 1)
|
|
|
else:
|
|
|
from_dir = ''
|
|
|
from_name = path
|
|
|
|
|
|
model = self.get(path)
|
|
|
model.pop('path', None)
|
|
|
model.pop('name', None)
|
|
|
if model['type'] == 'directory':
|
|
|
raise HTTPError(400, "Can't copy directories")
|
|
|
|
|
|
if not to_path:
|
|
|
to_path = from_dir
|
|
|
if self.dir_exists(to_path):
|
|
|
name = copy_pat.sub(u'.', from_name)
|
|
|
to_name = self.increment_filename(name, to_path, insert='-Copy')
|
|
|
to_path = u'{0}/{1}'.format(to_path, to_name)
|
|
|
|
|
|
model = self.save(model, to_path)
|
|
|
return model
|
|
|
|
|
|
def log_info(self):
|
|
|
self.log.info(self.info_string())
|
|
|
|
|
|
def trust_notebook(self, path):
|
|
|
"""Explicitly trust a notebook
|
|
|
|
|
|
Parameters
|
|
|
----------
|
|
|
path : string
|
|
|
The path of a notebook
|
|
|
"""
|
|
|
model = self.get(path)
|
|
|
nb = model['content']
|
|
|
self.log.warn("Trusting notebook %s", path)
|
|
|
self.notary.mark_cells(nb, True)
|
|
|
self.save(model, path)
|
|
|
|
|
|
def check_and_sign(self, nb, path=''):
|
|
|
"""Check for trusted cells, and sign the notebook.
|
|
|
|
|
|
Called as a part of saving notebooks.
|
|
|
|
|
|
Parameters
|
|
|
----------
|
|
|
nb : dict
|
|
|
The notebook dict
|
|
|
path : string
|
|
|
The notebook's path (for logging)
|
|
|
"""
|
|
|
if self.notary.check_cells(nb):
|
|
|
self.notary.sign(nb)
|
|
|
else:
|
|
|
self.log.warn("Saving untrusted notebook %s", path)
|
|
|
|
|
|
def mark_trusted_cells(self, nb, path=''):
|
|
|
"""Mark cells as trusted if the notebook signature matches.
|
|
|
|
|
|
Called as a part of loading notebooks.
|
|
|
|
|
|
Parameters
|
|
|
----------
|
|
|
nb : dict
|
|
|
The notebook object (in current nbformat)
|
|
|
path : string
|
|
|
The notebook's path (for logging)
|
|
|
"""
|
|
|
trusted = self.notary.check_signature(nb)
|
|
|
if not trusted:
|
|
|
self.log.warn("Notebook %s is not trusted", path)
|
|
|
self.notary.mark_cells(nb, trusted)
|
|
|
|
|
|
def should_list(self, name):
|
|
|
"""Should this file/directory name be displayed in a listing?"""
|
|
|
return not any(fnmatch(name, glob) for glob in self.hide_globs)
|
|
|
|
