|
|
"""A contents manager that uses the local file system for storage."""
|
|
|
|
|
|
# Copyright (c) IPython Development Team.
|
|
|
# Distributed under the terms of the Modified BSD License.
|
|
|
|
|
|
import base64
|
|
|
from contextlib import contextmanager
|
|
|
import errno
|
|
|
import io
|
|
|
import os
|
|
|
import shutil
|
|
|
import mimetypes
|
|
|
|
|
|
from tornado import web
|
|
|
|
|
|
from .manager import (
|
|
|
CheckpointManager,
|
|
|
ContentsManager,
|
|
|
)
|
|
|
from IPython import nbformat
|
|
|
from IPython.utils.io import atomic_writing
|
|
|
from IPython.utils.importstring import import_item
|
|
|
from IPython.utils.path import ensure_dir_exists
|
|
|
from IPython.utils.traitlets import Any, Unicode, Bool, TraitError
|
|
|
from IPython.utils.py3compat import getcwd, string_types, str_to_unicode
|
|
|
from IPython.utils import tz
|
|
|
from IPython.html.utils import (
|
|
|
is_hidden,
|
|
|
to_api_path,
|
|
|
to_os_path,
|
|
|
)
|
|
|
|
|
|
_script_exporter = None
|
|
|
|
|
|
def _post_save_script(model, os_path, contents_manager, **kwargs):
|
|
|
"""convert notebooks to Python script after save with nbconvert
|
|
|
|
|
|
replaces `ipython notebook --script`
|
|
|
"""
|
|
|
from IPython.nbconvert.exporters.script import ScriptExporter
|
|
|
|
|
|
if model['type'] != 'notebook':
|
|
|
return
|
|
|
|
|
|
global _script_exporter
|
|
|
if _script_exporter is None:
|
|
|
_script_exporter = ScriptExporter(parent=contents_manager)
|
|
|
log = contents_manager.log
|
|
|
|
|
|
base, ext = os.path.splitext(os_path)
|
|
|
py_fname = base + '.py'
|
|
|
script, resources = _script_exporter.from_filename(os_path)
|
|
|
script_fname = base + resources.get('output_extension', '.txt')
|
|
|
log.info("Saving script /%s", to_api_path(script_fname, contents_manager.root_dir))
|
|
|
with io.open(script_fname, 'w', encoding='utf-8') as f:
|
|
|
f.write(script)
|
|
|
|
|
|
|
|
|
class FileManagerMixin(object):
|
|
|
"""
|
|
|
Mixin for ContentsAPI classes that interact with the filesystem.
|
|
|
|
|
|
Provides facilities for reading, writing, and copying both notebooks and
|
|
|
generic files.
|
|
|
|
|
|
Shared by FileContentsManager and FileCheckpointManager.
|
|
|
|
|
|
Note
|
|
|
----
|
|
|
Classes using this mixin must provide the following attributes:
|
|
|
|
|
|
root_dir : unicode
|
|
|
A directory against against which API-style paths are to be resolved.
|
|
|
|
|
|
log : logging.Logger
|
|
|
"""
|
|
|
|
|
|
@contextmanager
|
|
|
def open(self, os_path, *args, **kwargs):
|
|
|
"""wrapper around io.open that turns permission errors into 403"""
|
|
|
with self.perm_to_403(os_path):
|
|
|
with io.open(os_path, *args, **kwargs) as f:
|
|
|
yield f
|
|
|
|
|
|
@contextmanager
|
|
|
def atomic_writing(self, os_path, *args, **kwargs):
|
|
|
"""wrapper around atomic_writing that turns permission errors into 403"""
|
|
|
with self.perm_to_403(os_path):
|
|
|
with atomic_writing(os_path, *args, **kwargs) as f:
|
|
|
yield f
|
|
|
|
|
|
@contextmanager
|
|
|
def perm_to_403(self, os_path=''):
|
|
|
"""context manager for turning permission errors into 403."""
|
|
|
try:
|
|
|
yield
|
|
|
except OSError as e:
|
|
|
if e.errno in {errno.EPERM, errno.EACCES}:
|
|
|
# make 403 error message without root prefix
|
|
|
# this may not work perfectly on unicode paths on Python 2,
|
|
|
# but nobody should be doing that anyway.
|
|
|
if not os_path:
|
|
|
os_path = str_to_unicode(e.filename or 'unknown file')
|
|
|
path = to_api_path(os_path, root=self.root_dir)
|
|
|
raise web.HTTPError(403, u'Permission denied: %s' % path)
|
|
|
else:
|
|
|
raise
|
|
|
|
|
|
def _copy(self, src, dest):
|
|
|
"""copy src to dest
|
|
|
|
|
|
like shutil.copy2, but log errors in copystat
|
|
|
"""
|
|
|
shutil.copyfile(src, dest)
|
|
|
try:
|
|
|
shutil.copystat(src, dest)
|
|
|
except OSError:
|
|
|
self.log.debug("copystat on %s failed", dest, exc_info=True)
|
|
|
|
|
|
def _get_os_path(self, path):
|
|
|
"""Given an API path, return its file system path.
|
|
|
|
|
|
Parameters
|
|
|
----------
|
|
|
path : string
|
|
|
The relative API path to the named file.
|
|
|
|
|
|
Returns
|
|
|
-------
|
|
|
path : string
|
|
|
Native, absolute OS path to for a file.
|
|
|
"""
|
|
|
return to_os_path(path, self.root_dir)
|
|
|
|
|
|
def _read_notebook(self, os_path, as_version=4):
|
|
|
"""Read a notebook from an os path."""
|
|
|
with self.open(os_path, 'r', encoding='utf-8') as f:
|
|
|
try:
|
|
|
return nbformat.read(f, as_version=as_version)
|
|
|
except Exception as e:
|
|
|
raise web.HTTPError(
|
|
|
400,
|
|
|
u"Unreadable Notebook: %s %r" % (os_path, e),
|
|
|
)
|
|
|
|
|
|
def _save_notebook(self, os_path, nb):
|
|
|
"""Save a notebook to an os_path."""
|
|
|
with self.atomic_writing(os_path, encoding='utf-8') as f:
|
|
|
nbformat.write(nb, f, version=nbformat.NO_CONVERT)
|
|
|
|
|
|
def _read_file(self, os_path, format):
|
|
|
"""Read a non-notebook file.
|
|
|
|
|
|
os_path: The path to be read.
|
|
|
format:
|
|
|
If 'text', the contents will be decoded as UTF-8.
|
|
|
If 'base64', the raw bytes contents will be encoded as base64.
|
|
|
If not specified, try to decode as UTF-8, and fall back to base64
|
|
|
"""
|
|
|
if not os.path.isfile(os_path):
|
|
|
raise web.HTTPError(400, "Cannot read non-file %s" % os_path)
|
|
|
|
|
|
with self.open(os_path, 'rb') as f:
|
|
|
bcontent = f.read()
|
|
|
|
|
|
if format is None or format == 'text':
|
|
|
# Try to interpret as unicode if format is unknown or if unicode
|
|
|
# was explicitly requested.
|
|
|
try:
|
|
|
return bcontent.decode('utf8'), 'text'
|
|
|
except UnicodeError as e:
|
|
|
if format == 'text':
|
|
|
raise web.HTTPError(
|
|
|
400,
|
|
|
"%s is not UTF-8 encoded" % os_path,
|
|
|
reason='bad format',
|
|
|
)
|
|
|
return base64.encodestring(bcontent).decode('ascii'), 'base64'
|
|
|
|
|
|
def _save_file(self, os_path, content, format):
|
|
|
"""Save content of a generic file."""
|
|
|
if format not in {'text', 'base64'}:
|
|
|
raise web.HTTPError(
|
|
|
400,
|
|
|
"Must specify format of file contents as 'text' or 'base64'",
|
|
|
)
|
|
|
try:
|
|
|
if format == 'text':
|
|
|
bcontent = content.encode('utf8')
|
|
|
else:
|
|
|
b64_bytes = content.encode('ascii')
|
|
|
bcontent = base64.decodestring(b64_bytes)
|
|
|
except Exception as e:
|
|
|
raise web.HTTPError(400, u'Encoding error saving %s: %s' % (os_path, e))
|
|
|
|
|
|
with self.atomic_writing(os_path, text=False) as f:
|
|
|
f.write(bcontent)
|
|
|
|
|
|
|
|
|
class FileCheckpointManager(FileManagerMixin, CheckpointManager):
|
|
|
"""
|
|
|
A CheckpointManager that caches checkpoints for files in adjacent
|
|
|
directories.
|
|
|
"""
|
|
|
|
|
|
checkpoint_dir = Unicode(
|
|
|
'.ipynb_checkpoints',
|
|
|
config=True,
|
|
|
help="""The directory name in which to keep file checkpoints
|
|
|
|
|
|
This is a path relative to the file's own directory.
|
|
|
|
|
|
By default, it is .ipynb_checkpoints
|
|
|
""",
|
|
|
)
|
|
|
|
|
|
root_dir = Unicode(config=True)
|
|
|
|
|
|
def _root_dir_default(self):
|
|
|
try:
|
|
|
return self.parent.root_dir
|
|
|
except AttributeError:
|
|
|
return getcwd()
|
|
|
|
|
|
# public checkpoint API
|
|
|
def create_file_checkpoint(self, content, format, path):
|
|
|
"""Create a checkpoint from the current content of a notebook."""
|
|
|
path = path.strip('/')
|
|
|
# only the one checkpoint ID:
|
|
|
checkpoint_id = u"checkpoint"
|
|
|
os_checkpoint_path = self.checkpoint_path(checkpoint_id, path)
|
|
|
self.log.debug("creating checkpoint for %s", path)
|
|
|
with self.perm_to_403():
|
|
|
self._save_file(os_checkpoint_path, content, format=format)
|
|
|
|
|
|
# return the checkpoint info
|
|
|
return self.checkpoint_model(checkpoint_id, os_checkpoint_path)
|
|
|
|
|
|
def create_notebook_checkpoint(self, nb, path):
|
|
|
"""Create a checkpoint from the current content of a notebook."""
|
|
|
path = path.strip('/')
|
|
|
# only the one checkpoint ID:
|
|
|
checkpoint_id = u"checkpoint"
|
|
|
os_checkpoint_path = self.checkpoint_path(checkpoint_id, path)
|
|
|
self.log.debug("creating checkpoint for %s", path)
|
|
|
with self.perm_to_403():
|
|
|
self._save_notebook(os_checkpoint_path, nb)
|
|
|
|
|
|
# return the checkpoint info
|
|
|
return self.checkpoint_model(checkpoint_id, os_checkpoint_path)
|
|
|
|
|
|
def get_checkpoint(self, checkpoint_id, path, type):
|
|
|
"""Get the content of a checkpoint.
|
|
|
|
|
|
Returns a model suitable for passing to ContentsManager.save.
|
|
|
"""
|
|
|
path = path.strip('/')
|
|
|
self.log.info("restoring %s from checkpoint %s", path, checkpoint_id)
|
|
|
os_checkpoint_path = self.checkpoint_path(checkpoint_id, path)
|
|
|
if not os.path.isfile(os_checkpoint_path):
|
|
|
self.no_such_checkpoint(path, checkpoint_id)
|
|
|
if type == 'notebook':
|
|
|
return {
|
|
|
'type': type,
|
|
|
'content': self._read_notebook(
|
|
|
os_checkpoint_path,
|
|
|
as_version=4,
|
|
|
),
|
|
|
}
|
|
|
else:
|
|
|
content, format = self._read_file(os_checkpoint_path, format=None)
|
|
|
return {
|
|
|
'type': type,
|
|
|
'content': content,
|
|
|
'format': format,
|
|
|
}
|
|
|
|
|
|
def rename_checkpoint(self, checkpoint_id, old_path, new_path):
|
|
|
"""Rename a checkpoint from old_path to new_path."""
|
|
|
old_cp_path = self.checkpoint_path(checkpoint_id, old_path)
|
|
|
new_cp_path = self.checkpoint_path(checkpoint_id, new_path)
|
|
|
if os.path.isfile(old_cp_path):
|
|
|
self.log.debug(
|
|
|
"Renaming checkpoint %s -> %s",
|
|
|
old_cp_path,
|
|
|
new_cp_path,
|
|
|
)
|
|
|
with self.perm_to_403():
|
|
|
shutil.move(old_cp_path, new_cp_path)
|
|
|
|
|
|
def delete_checkpoint(self, checkpoint_id, path):
|
|
|
"""delete a file's checkpoint"""
|
|
|
path = path.strip('/')
|
|
|
cp_path = self.checkpoint_path(checkpoint_id, path)
|
|
|
if not os.path.isfile(cp_path):
|
|
|
self.no_such_checkpoint(path, checkpoint_id)
|
|
|
|
|
|
self.log.debug("unlinking %s", cp_path)
|
|
|
with self.perm_to_403():
|
|
|
os.unlink(cp_path)
|
|
|
|
|
|
def list_checkpoints(self, path):
|
|
|
"""list the checkpoints for a given file
|
|
|
|
|
|
This contents manager currently only supports one checkpoint per file.
|
|
|
"""
|
|
|
path = path.strip('/')
|
|
|
checkpoint_id = "checkpoint"
|
|
|
os_path = self.checkpoint_path(checkpoint_id, path)
|
|
|
if not os.path.isfile(os_path):
|
|
|
return []
|
|
|
else:
|
|
|
return [self.checkpoint_model(checkpoint_id, os_path)]
|
|
|
|
|
|
# Checkpoint-related utilities
|
|
|
def checkpoint_path(self, checkpoint_id, path):
|
|
|
"""find the path to a checkpoint"""
|
|
|
path = path.strip('/')
|
|
|
parent, name = ('/' + path).rsplit('/', 1)
|
|
|
parent = parent.strip('/')
|
|
|
basename, ext = os.path.splitext(name)
|
|
|
filename = u"{name}-{checkpoint_id}{ext}".format(
|
|
|
name=basename,
|
|
|
checkpoint_id=checkpoint_id,
|
|
|
ext=ext,
|
|
|
)
|
|
|
os_path = self._get_os_path(path=parent)
|
|
|
cp_dir = os.path.join(os_path, self.checkpoint_dir)
|
|
|
with self.perm_to_403():
|
|
|
ensure_dir_exists(cp_dir)
|
|
|
cp_path = os.path.join(cp_dir, filename)
|
|
|
return cp_path
|
|
|
|
|
|
def checkpoint_model(self, checkpoint_id, os_path):
|
|
|
"""construct the info dict for a given checkpoint"""
|
|
|
stats = os.stat(os_path)
|
|
|
last_modified = tz.utcfromtimestamp(stats.st_mtime)
|
|
|
info = dict(
|
|
|
id=checkpoint_id,
|
|
|
last_modified=last_modified,
|
|
|
)
|
|
|
return info
|
|
|
|
|
|
# Error Handling
|
|
|
def no_such_checkpoint(self, path, checkpoint_id):
|
|
|
raise web.HTTPError(
|
|
|
404,
|
|
|
u'Checkpoint does not exist: %s@%s' % (path, checkpoint_id)
|
|
|
)
|
|
|
|
|
|
|
|
|
class FileContentsManager(FileManagerMixin, ContentsManager):
|
|
|
|
|
|
root_dir = Unicode(config=True)
|
|
|
|
|
|
def _root_dir_default(self):
|
|
|
try:
|
|
|
return self.parent.notebook_dir
|
|
|
except AttributeError:
|
|
|
return getcwd()
|
|
|
|
|
|
save_script = Bool(False, config=True, help='DEPRECATED, use post_save_hook')
|
|
|
def _save_script_changed(self):
|
|
|
self.log.warn("""
|
|
|
`--script` is deprecated. You can trigger nbconvert via pre- or post-save hooks:
|
|
|
|
|
|
ContentsManager.pre_save_hook
|
|
|
FileContentsManager.post_save_hook
|
|
|
|
|
|
A post-save hook has been registered that calls:
|
|
|
|
|
|
ipython nbconvert --to script [notebook]
|
|
|
|
|
|
which behaves similarly to `--script`.
|
|
|
""")
|
|
|
|
|
|
self.post_save_hook = _post_save_script
|
|
|
|
|
|
post_save_hook = Any(None, config=True,
|
|
|
help="""Python callable or importstring thereof
|
|
|
|
|
|
to be called on the path of a file just saved.
|
|
|
|
|
|
This can be used to process the file on disk,
|
|
|
such as converting the notebook to a script or HTML via nbconvert.
|
|
|
|
|
|
It will be called as (all arguments passed by keyword):
|
|
|
|
|
|
hook(os_path=os_path, model=model, contents_manager=instance)
|
|
|
|
|
|
path: the filesystem path to the file just written
|
|
|
model: the model representing the file
|
|
|
contents_manager: this ContentsManager instance
|
|
|
"""
|
|
|
)
|
|
|
def _post_save_hook_changed(self, name, old, new):
|
|
|
if new and isinstance(new, string_types):
|
|
|
self.post_save_hook = import_item(self.post_save_hook)
|
|
|
elif new:
|
|
|
if not callable(new):
|
|
|
raise TraitError("post_save_hook must be callable")
|
|
|
|
|
|
def run_post_save_hook(self, model, os_path):
|
|
|
"""Run the post-save hook if defined, and log errors"""
|
|
|
if self.post_save_hook:
|
|
|
try:
|
|
|
self.log.debug("Running post-save hook on %s", os_path)
|
|
|
self.post_save_hook(os_path=os_path, model=model, contents_manager=self)
|
|
|
except Exception:
|
|
|
self.log.error("Post-save hook failed on %s", os_path, exc_info=True)
|
|
|
|
|
|
def _root_dir_changed(self, name, old, new):
|
|
|
"""Do a bit of validation of the root_dir."""
|
|
|
if not os.path.isabs(new):
|
|
|
# If we receive a non-absolute path, make it absolute.
|
|
|
self.root_dir = os.path.abspath(new)
|
|
|
return
|
|
|
if not os.path.isdir(new):
|
|
|
raise TraitError("%r is not a directory" % new)
|
|
|
|
|
|
def _checkpoint_manager_class_default(self):
|
|
|
return FileCheckpointManager
|
|
|
|
|
|
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 exists and is hidden.
|
|
|
"""
|
|
|
path = path.strip('/')
|
|
|
os_path = self._get_os_path(path=path)
|
|
|
return is_hidden(os_path, self.root_dir)
|
|
|
|
|
|
def file_exists(self, path):
|
|
|
"""Returns True if the file exists, else returns False.
|
|
|
|
|
|
API-style wrapper for os.path.isfile
|
|
|
|
|
|
Parameters
|
|
|
----------
|
|
|
path : string
|
|
|
The relative path to the file (with '/' as separator)
|
|
|
|
|
|
Returns
|
|
|
-------
|
|
|
exists : bool
|
|
|
Whether the file exists.
|
|
|
"""
|
|
|
path = path.strip('/')
|
|
|
os_path = self._get_os_path(path)
|
|
|
return os.path.isfile(os_path)
|
|
|
|
|
|
def dir_exists(self, path):
|
|
|
"""Does the API-style path refer to an extant directory?
|
|
|
|
|
|
API-style wrapper for os.path.isdir
|
|
|
|
|
|
Parameters
|
|
|
----------
|
|
|
path : string
|
|
|
The path to check. This is an API path (`/` separated,
|
|
|
relative to root_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 exists(self, path):
|
|
|
"""Returns True if the path exists, else returns False.
|
|
|
|
|
|
API-style wrapper for os.path.exists
|
|
|
|
|
|
Parameters
|
|
|
----------
|
|
|
path : string
|
|
|
The API path to the file (with '/' as separator)
|
|
|
|
|
|
Returns
|
|
|
-------
|
|
|
exists : bool
|
|
|
Whether the target exists.
|
|
|
"""
|
|
|
path = path.strip('/')
|
|
|
os_path = self._get_os_path(path=path)
|
|
|
return os.path.exists(os_path)
|
|
|
|
|
|
def _base_model(self, path):
|
|
|
"""Build the common base of a contents model"""
|
|
|
os_path = self._get_os_path(path)
|
|
|
info = os.stat(os_path)
|
|
|
last_modified = tz.utcfromtimestamp(info.st_mtime)
|
|
|
created = tz.utcfromtimestamp(info.st_ctime)
|
|
|
# Create the base model.
|
|
|
model = {}
|
|
|
model['name'] = path.rsplit('/', 1)[-1]
|
|
|
model['path'] = path
|
|
|
model['last_modified'] = last_modified
|
|
|
model['created'] = created
|
|
|
model['content'] = None
|
|
|
model['format'] = None
|
|
|
model['mimetype'] = None
|
|
|
try:
|
|
|
model['writable'] = os.access(os_path, os.W_OK)
|
|
|
except OSError:
|
|
|
self.log.error("Failed to check write permissions on %s", os_path)
|
|
|
model['writable'] = False
|
|
|
return model
|
|
|
|
|
|
def _dir_model(self, path, content=True):
|
|
|
"""Build a model for a directory
|
|
|
|
|
|
if content is requested, will include a listing of the directory
|
|
|
"""
|
|
|
os_path = self._get_os_path(path)
|
|
|
|
|
|
four_o_four = u'directory does not exist: %r' % path
|
|
|
|
|
|
if not os.path.isdir(os_path):
|
|
|
raise web.HTTPError(404, four_o_four)
|
|
|
elif is_hidden(os_path, self.root_dir):
|
|
|
self.log.info("Refusing to serve hidden directory %r, via 404 Error",
|
|
|
os_path
|
|
|
)
|
|
|
raise web.HTTPError(404, four_o_four)
|
|
|
|
|
|
model = self._base_model(path)
|
|
|
model['type'] = 'directory'
|
|
|
if content:
|
|
|
model['content'] = contents = []
|
|
|
os_dir = self._get_os_path(path)
|
|
|
for name in os.listdir(os_dir):
|
|
|
os_path = os.path.join(os_dir, name)
|
|
|
# skip over broken symlinks in listing
|
|
|
if not os.path.exists(os_path):
|
|
|
self.log.warn("%s doesn't exist", os_path)
|
|
|
continue
|
|
|
elif not os.path.isfile(os_path) and not os.path.isdir(os_path):
|
|
|
self.log.debug("%s not a regular file", os_path)
|
|
|
continue
|
|
|
if self.should_list(name) and not is_hidden(os_path, self.root_dir):
|
|
|
contents.append(self.get(
|
|
|
path='%s/%s' % (path, name),
|
|
|
content=False)
|
|
|
)
|
|
|
|
|
|
model['format'] = 'json'
|
|
|
|
|
|
return model
|
|
|
|
|
|
def _file_model(self, path, content=True, format=None):
|
|
|
"""Build a model for a file
|
|
|
|
|
|
if content is requested, include the file contents.
|
|
|
|
|
|
format:
|
|
|
If 'text', the contents will be decoded as UTF-8.
|
|
|
If 'base64', the raw bytes contents will be encoded as base64.
|
|
|
If not specified, try to decode as UTF-8, and fall back to base64
|
|
|
"""
|
|
|
model = self._base_model(path)
|
|
|
model['type'] = 'file'
|
|
|
|
|
|
os_path = self._get_os_path(path)
|
|
|
|
|
|
if content:
|
|
|
content, format = self._read_file(os_path, format)
|
|
|
default_mime = {
|
|
|
'text': 'text/plain',
|
|
|
'base64': 'application/octet-stream'
|
|
|
}[format]
|
|
|
|
|
|
model.update(
|
|
|
content=content,
|
|
|
format=format,
|
|
|
mimetype=mimetypes.guess_type(os_path)[0] or default_mime,
|
|
|
)
|
|
|
|
|
|
return model
|
|
|
|
|
|
def _notebook_model(self, path, content=True):
|
|
|
"""Build a notebook model
|
|
|
|
|
|
if content is requested, the notebook content will be populated
|
|
|
as a JSON structure (not double-serialized)
|
|
|
"""
|
|
|
model = self._base_model(path)
|
|
|
model['type'] = 'notebook'
|
|
|
if content:
|
|
|
os_path = self._get_os_path(path)
|
|
|
nb = self._read_notebook(os_path, as_version=4)
|
|
|
self.mark_trusted_cells(nb, path)
|
|
|
model['content'] = nb
|
|
|
model['format'] = 'json'
|
|
|
self.validate_notebook_model(model)
|
|
|
return model
|
|
|
|
|
|
def get(self, path, content=True, type=None, format=None):
|
|
|
""" Takes a path for an entity and returns its model
|
|
|
|
|
|
Parameters
|
|
|
----------
|
|
|
path : str
|
|
|
the API path that describes the relative path for the target
|
|
|
content : bool
|
|
|
Whether to include the contents in the reply
|
|
|
type : str, optional
|
|
|
The requested type - 'file', 'notebook', or 'directory'.
|
|
|
Will raise HTTPError 400 if the content doesn't match.
|
|
|
format : str, optional
|
|
|
The requested format for file contents. 'text' or 'base64'.
|
|
|
Ignored if this returns a notebook or directory model.
|
|
|
|
|
|
Returns
|
|
|
-------
|
|
|
model : dict
|
|
|
the contents model. If content=True, returns the contents
|
|
|
of the file or directory as well.
|
|
|
"""
|
|
|
path = path.strip('/')
|
|
|
|
|
|
if not self.exists(path):
|
|
|
raise web.HTTPError(404, u'No such file or directory: %s' % path)
|
|
|
|
|
|
os_path = self._get_os_path(path)
|
|
|
if os.path.isdir(os_path):
|
|
|
if type not in (None, 'directory'):
|
|
|
raise web.HTTPError(400,
|
|
|
u'%s is a directory, not a %s' % (path, type), reason='bad type')
|
|
|
model = self._dir_model(path, content=content)
|
|
|
elif type == 'notebook' or (type is None and path.endswith('.ipynb')):
|
|
|
model = self._notebook_model(path, content=content)
|
|
|
else:
|
|
|
if type == 'directory':
|
|
|
raise web.HTTPError(400,
|
|
|
u'%s is not a directory', reason='bad type')
|
|
|
model = self._file_model(path, content=content, format=format)
|
|
|
return model
|
|
|
|
|
|
def _save_directory(self, os_path, model, path=''):
|
|
|
"""create a directory"""
|
|
|
if is_hidden(os_path, self.root_dir):
|
|
|
raise web.HTTPError(400, u'Cannot create hidden directory %r' % os_path)
|
|
|
if not os.path.exists(os_path):
|
|
|
with self.perm_to_403():
|
|
|
os.mkdir(os_path)
|
|
|
elif not os.path.isdir(os_path):
|
|
|
raise web.HTTPError(400, u'Not a directory: %s' % (os_path))
|
|
|
else:
|
|
|
self.log.debug("Directory %r already exists", os_path)
|
|
|
|
|
|
def save(self, model, path=''):
|
|
|
"""Save the file model and return the model with no content."""
|
|
|
path = path.strip('/')
|
|
|
|
|
|
if 'type' not in model:
|
|
|
raise web.HTTPError(400, u'No file type provided')
|
|
|
if 'content' not in model and model['type'] != 'directory':
|
|
|
raise web.HTTPError(400, u'No file content provided')
|
|
|
|
|
|
self.run_pre_save_hook(model=model, path=path)
|
|
|
|
|
|
os_path = self._get_os_path(path)
|
|
|
self.log.debug("Saving %s", os_path)
|
|
|
try:
|
|
|
if model['type'] == 'notebook':
|
|
|
nb = nbformat.from_dict(model['content'])
|
|
|
self.check_and_sign(nb, path)
|
|
|
self._save_notebook(os_path, nb)
|
|
|
# One checkpoint should always exist for notebooks.
|
|
|
if not self.checkpoint_manager.list_checkpoints(path):
|
|
|
self.checkpoint_manager.create_notebook_checkpoint(
|
|
|
nb,
|
|
|
path,
|
|
|
)
|
|
|
elif model['type'] == 'file':
|
|
|
# Missing format will be handled internally by _save_file.
|
|
|
self._save_file(os_path, model['content'], model.get('format'))
|
|
|
elif model['type'] == 'directory':
|
|
|
self._save_directory(os_path, model, path)
|
|
|
else:
|
|
|
raise web.HTTPError(400, "Unhandled contents type: %s" % model['type'])
|
|
|
except web.HTTPError:
|
|
|
raise
|
|
|
except Exception as e:
|
|
|
self.log.error(u'Error while saving file: %s %s', path, e, exc_info=True)
|
|
|
raise web.HTTPError(500, u'Unexpected error while saving file: %s %s' % (path, e))
|
|
|
|
|
|
validation_message = None
|
|
|
if model['type'] == 'notebook':
|
|
|
self.validate_notebook_model(model)
|
|
|
validation_message = model.get('message', None)
|
|
|
|
|
|
model = self.get(path, content=False)
|
|
|
if validation_message:
|
|
|
model['message'] = validation_message
|
|
|
|
|
|
self.run_post_save_hook(model=model, os_path=os_path)
|
|
|
|
|
|
return model
|
|
|
|
|
|
def delete_file(self, path):
|
|
|
"""Delete file at path."""
|
|
|
path = path.strip('/')
|
|
|
os_path = self._get_os_path(path)
|
|
|
rm = os.unlink
|
|
|
if os.path.isdir(os_path):
|
|
|
listing = os.listdir(os_path)
|
|
|
# Don't delete non-empty directories.
|
|
|
# A directory containing only leftover checkpoints is
|
|
|
# considered empty.
|
|
|
cp_dir = getattr(self.checkpoint_manager, 'checkpoint_dir', None)
|
|
|
for entry in listing:
|
|
|
if entry != cp_dir:
|
|
|
raise web.HTTPError(400, u'Directory %s not empty' % os_path)
|
|
|
elif not os.path.isfile(os_path):
|
|
|
raise web.HTTPError(404, u'File does not exist: %s' % os_path)
|
|
|
|
|
|
if os.path.isdir(os_path):
|
|
|
self.log.debug("Removing directory %s", os_path)
|
|
|
with self.perm_to_403():
|
|
|
shutil.rmtree(os_path)
|
|
|
else:
|
|
|
self.log.debug("Unlinking file %s", os_path)
|
|
|
with self.perm_to_403():
|
|
|
rm(os_path)
|
|
|
|
|
|
def rename_file(self, old_path, new_path):
|
|
|
"""Rename a file."""
|
|
|
old_path = old_path.strip('/')
|
|
|
new_path = new_path.strip('/')
|
|
|
if new_path == old_path:
|
|
|
return
|
|
|
|
|
|
new_os_path = self._get_os_path(new_path)
|
|
|
old_os_path = self._get_os_path(old_path)
|
|
|
|
|
|
# Should we proceed with the move?
|
|
|
if os.path.exists(new_os_path):
|
|
|
raise web.HTTPError(409, u'File already exists: %s' % new_path)
|
|
|
|
|
|
# Move the file
|
|
|
try:
|
|
|
with self.perm_to_403():
|
|
|
shutil.move(old_os_path, new_os_path)
|
|
|
except web.HTTPError:
|
|
|
raise
|
|
|
except Exception as e:
|
|
|
raise web.HTTPError(500, u'Unknown error renaming file: %s %s' % (old_path, e))
|
|
|
|
|
|
def info_string(self):
|
|
|
return "Serving notebooks from local directory: %s" % self.root_dir
|
|
|
|
|
|
def get_kernel_path(self, path, model=None):
|
|
|
"""Return the initial API path of a kernel associated with a given notebook"""
|
|
|
if '/' in path:
|
|
|
parent_dir = path.rsplit('/', 1)[0]
|
|
|
else:
|
|
|
parent_dir = ''
|
|
|
return parent_dir
|
|
|
|
