refactor
This commit is contained in:
Unrud
357
radicale/storage/__init__.py
Normal file
357
radicale/storage/__init__.py
Normal file
@ -0,0 +1,357 @@
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# This file is part of Radicale Server - Calendar Server
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# Copyright © 2014 Jean-Marc Martins
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# Copyright © 2012-2017 Guillaume Ayoub
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# Copyright © 2017-2018 Unrud <unrud@outlook.com>
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#
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# This library is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This library is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with Radicale. If not, see <http://www.gnu.org/licenses/>.
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"""
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Storage backends.
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This module loads the storage backend, according to the storage configuration.
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Default storage uses one folder per collection and one file per collection
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entry.
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"""
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import json
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from contextlib import contextmanager
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from hashlib import md5
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from importlib import import_module
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import pkg_resources
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import vobject
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from radicale.log import logger
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INTERNAL_TYPES = ("multifilesystem",)
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CACHE_DEPS = ("radicale", "vobject", "python-dateutil",)
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CACHE_VERSION = (";".join(pkg_resources.get_distribution(pkg).version
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for pkg in CACHE_DEPS) + ";").encode()
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def load(configuration):
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"""Load the storage manager chosen in configuration."""
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storage_type = configuration.get("storage", "type")
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if storage_type in INTERNAL_TYPES:
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module = "radicale.storage.%s" % storage_type
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else:
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module = storage_type
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try:
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class_ = import_module(module).Collection
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except Exception as e:
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raise RuntimeError("Failed to load storage module %r: %s" %
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(storage_type, e)) from e
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logger.info("Storage type is %r", storage_type)
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class CollectionCopy(class_):
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"""Collection copy, avoids overriding the original class attributes."""
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CollectionCopy.configuration = configuration
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CollectionCopy.static_init()
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return CollectionCopy
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class ComponentExistsError(ValueError):
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def __init__(self, path):
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message = "Component already exists: %r" % path
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super().__init__(message)
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class ComponentNotFoundError(ValueError):
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def __init__(self, path):
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message = "Component doesn't exist: %r" % path
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super().__init__(message)
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class BaseCollection:
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# Overriden on copy by the "load" function
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configuration = None
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# Properties of instance
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"""The sanitized path of the collection without leading or trailing ``/``.
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"""
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path = ""
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@classmethod
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def static_init():
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"""init collection copy"""
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pass
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@property
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def owner(self):
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"""The owner of the collection."""
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return self.path.split("/", maxsplit=1)[0]
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@property
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def is_principal(self):
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"""Collection is a principal."""
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return bool(self.path) and "/" not in self.path
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@classmethod
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def discover(cls, path, depth="0"):
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"""Discover a list of collections under the given ``path``.
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``path`` is sanitized.
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If ``depth`` is "0", only the actual object under ``path`` is
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returned.
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If ``depth`` is anything but "0", it is considered as "1" and direct
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children are included in the result.
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The root collection "/" must always exist.
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"""
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raise NotImplementedError
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@classmethod
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def move(cls, item, to_collection, to_href):
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"""Move an object.
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``item`` is the item to move.
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``to_collection`` is the target collection.
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``to_href`` is the target name in ``to_collection``. An item with the
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same name might already exist.
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"""
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if item.collection.path == to_collection.path and item.href == to_href:
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return
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to_collection.upload(to_href, item)
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item.collection.delete(item.href)
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@property
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def etag(self):
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"""Encoded as quoted-string (see RFC 2616)."""
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etag = md5()
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for item in self.get_all():
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etag.update((item.href + "/" + item.etag).encode("utf-8"))
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etag.update(json.dumps(self.get_meta(), sort_keys=True).encode())
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return '"%s"' % etag.hexdigest()
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@classmethod
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def create_collection(cls, href, items=None, props=None):
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"""Create a collection.
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``href`` is the sanitized path.
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If the collection already exists and neither ``collection`` nor
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``props`` are set, this method shouldn't do anything. Otherwise the
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existing collection must be replaced.
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``collection`` is a list of vobject components.
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``props`` are metadata values for the collection.
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``props["tag"]`` is the type of collection (VCALENDAR or
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VADDRESSBOOK). If the key ``tag`` is missing, it is guessed from the
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collection.
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"""
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raise NotImplementedError
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def sync(self, old_token=None):
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"""Get the current sync token and changed items for synchronization.
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``old_token`` an old sync token which is used as the base of the
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delta update. If sync token is missing, all items are returned.
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ValueError is raised for invalid or old tokens.
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WARNING: This simple default implementation treats all sync-token as
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invalid. It adheres to the specification but some clients
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(e.g. InfCloud) don't like it. Subclasses should provide a
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more sophisticated implementation.
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"""
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token = "http://radicale.org/ns/sync/%s" % self.etag.strip("\"")
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if old_token:
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raise ValueError("Sync token are not supported")
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return token, self.list()
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def list(self):
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"""List collection items."""
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raise NotImplementedError
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def get(self, href):
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"""Fetch a single item."""
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raise NotImplementedError
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def get_multi(self, hrefs):
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"""Fetch multiple items.
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Functionally similar to ``get``, but might bring performance benefits
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on some storages when used cleverly. It's not required to return the
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requested items in the correct order. Duplicated hrefs can be ignored.
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Returns tuples with the href and the item or None if the item doesn't
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exist.
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"""
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return ((href, self.get(href)) for href in hrefs)
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def get_all(self):
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"""Fetch all items.
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Functionally similar to ``get``, but might bring performance benefits
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on some storages when used cleverly.
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"""
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return map(self.get, self.list())
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def get_all_filtered(self, filters):
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"""Fetch all items with optional filtering.
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This can largely improve performance of reports depending on
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the filters and this implementation.
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Returns tuples in the form ``(item, filters_matched)``.
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``filters_matched`` is a bool that indicates if ``filters`` are fully
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matched.
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This returns all events by default
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"""
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return ((item, False) for item in self.get_all())
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def has(self, href):
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"""Check if an item exists by its href.
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Functionally similar to ``get``, but might bring performance benefits
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on some storages when used cleverly.
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"""
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return self.get(href) is not None
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def has_uid(self, uid):
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"""Check if a UID exists in the collection."""
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for item in self.get_all():
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if item.uid == uid:
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return True
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return False
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def upload(self, href, item):
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"""Upload a new or replace an existing item."""
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raise NotImplementedError
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def delete(self, href=None):
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"""Delete an item.
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When ``href`` is ``None``, delete the collection.
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"""
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raise NotImplementedError
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def get_meta(self, key=None):
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"""Get metadata value for collection.
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Return the value of the property ``key``. If ``key`` is ``None`` return
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a dict with all properties
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"""
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raise NotImplementedError
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def set_meta(self, props):
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"""Set metadata values for collection.
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``props`` a dict with values for properties.
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"""
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raise NotImplementedError
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@property
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def last_modified(self):
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"""Get the HTTP-datetime of when the collection was modified."""
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raise NotImplementedError
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def serialize(self):
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"""Get the unicode string representing the whole collection."""
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if self.get_meta("tag") == "VCALENDAR":
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in_vcalendar = False
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vtimezones = ""
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included_tzids = set()
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vtimezone = []
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tzid = None
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components = ""
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# Concatenate all child elements of VCALENDAR from all items
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# together, while preventing duplicated VTIMEZONE entries.
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# VTIMEZONEs are only distinguished by their TZID, if different
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# timezones share the same TZID this produces errornous ouput.
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# VObject fails at this too.
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for item in self.get_all():
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depth = 0
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for line in item.serialize().split("\r\n"):
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if line.startswith("BEGIN:"):
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depth += 1
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if depth == 1 and line == "BEGIN:VCALENDAR":
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in_vcalendar = True
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elif in_vcalendar:
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if depth == 1 and line.startswith("END:"):
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in_vcalendar = False
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if depth == 2 and line == "BEGIN:VTIMEZONE":
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vtimezone.append(line + "\r\n")
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elif vtimezone:
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vtimezone.append(line + "\r\n")
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if depth == 2 and line.startswith("TZID:"):
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tzid = line[len("TZID:"):]
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elif depth == 2 and line.startswith("END:"):
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if tzid is None or tzid not in included_tzids:
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vtimezones += "".join(vtimezone)
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included_tzids.add(tzid)
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vtimezone.clear()
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tzid = None
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elif depth >= 2:
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components += line + "\r\n"
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if line.startswith("END:"):
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depth -= 1
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template = vobject.iCalendar()
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displayname = self.get_meta("D:displayname")
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if displayname:
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template.add("X-WR-CALNAME")
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template.x_wr_calname.value_param = "TEXT"
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template.x_wr_calname.value = displayname
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description = self.get_meta("C:calendar-description")
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if description:
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template.add("X-WR-CALDESC")
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template.x_wr_caldesc.value_param = "TEXT"
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template.x_wr_caldesc.value = description
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template = template.serialize()
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template_insert_pos = template.find("\r\nEND:VCALENDAR\r\n") + 2
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assert template_insert_pos != -1
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return (template[:template_insert_pos] +
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vtimezones + components +
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template[template_insert_pos:])
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elif self.get_meta("tag") == "VADDRESSBOOK":
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return "".join((item.serialize() for item in self.get_all()))
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return ""
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@classmethod
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@contextmanager
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def acquire_lock(cls, mode, user=None):
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"""Set a context manager to lock the whole storage.
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``mode`` must either be "r" for shared access or "w" for exclusive
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access.
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``user`` is the name of the logged in user or empty.
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"""
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raise NotImplementedError
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@classmethod
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def verify(cls):
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"""Check the storage for errors."""
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return True
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843
radicale/storage/multifilesystem.py
Normal file
843
radicale/storage/multifilesystem.py
Normal file
@ -0,0 +1,843 @@
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# This file is part of Radicale Server - Calendar Server
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# Copyright © 2014 Jean-Marc Martins
|
||||
# Copyright © 2012-2017 Guillaume Ayoub
|
||||
# Copyright © 2017-2018 Unrud <unrud@outlook.com>
|
||||
#
|
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# This library is free software: you can redistribute it and/or modify
|
||||
# it under the terms of the GNU General Public License as published by
|
||||
# the Free Software Foundation, either version 3 of the License, or
|
||||
# (at your option) any later version.
|
||||
#
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# This library is distributed in the hope that it will be useful,
|
||||
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
# GNU General Public License for more details.
|
||||
#
|
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# You should have received a copy of the GNU General Public License
|
||||
# along with Radicale. If not, see <http://www.gnu.org/licenses/>.
|
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|
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import binascii
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import contextlib
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import json
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import logging
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import os
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import pickle
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import posixpath
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import shlex
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import subprocess
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import time
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from contextlib import contextmanager
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from hashlib import md5
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from itertools import chain
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from tempfile import NamedTemporaryFile, TemporaryDirectory
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import vobject
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from radicale import item as radicale_item
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from radicale import pathutils, storage
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from radicale.item import filter as radicale_filter
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from radicale.log import logger
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class Collection(storage.BaseCollection):
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"""Collection stored in several files per calendar."""
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@classmethod
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def static_init(cls):
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# init storage lock
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folder = os.path.expanduser(cls.configuration.get(
|
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"storage", "filesystem_folder"))
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cls._makedirs_synced(folder)
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lock_path = os.path.join(folder, ".Radicale.lock")
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cls._lock = pathutils.RwLock(lock_path)
|
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def __init__(self, path, filesystem_path=None):
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folder = self._get_collection_root_folder()
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# Path should already be sanitized
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self.path = pathutils.sanitize_path(path).strip("/")
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self._encoding = self.configuration.get("encoding", "stock")
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if filesystem_path is None:
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filesystem_path = pathutils.path_to_filesystem(folder, self.path)
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self._filesystem_path = filesystem_path
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self._props_path = os.path.join(
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self._filesystem_path, ".Radicale.props")
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self._meta_cache = None
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self._etag_cache = None
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||||
self._item_cache_cleaned = False
|
||||
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@classmethod
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||||
def _get_collection_root_folder(cls):
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filesystem_folder = os.path.expanduser(
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cls.configuration.get("storage", "filesystem_folder"))
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return os.path.join(filesystem_folder, "collection-root")
|
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|
||||
@contextmanager
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||||
def _atomic_write(self, path, mode="w", newline=None, sync_directory=True,
|
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replace_fn=os.replace):
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directory = os.path.dirname(path)
|
||||
tmp = NamedTemporaryFile(
|
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mode=mode, dir=directory, delete=False, prefix=".Radicale.tmp-",
|
||||
newline=newline, encoding=None if "b" in mode else self._encoding)
|
||||
try:
|
||||
yield tmp
|
||||
tmp.flush()
|
||||
try:
|
||||
self._fsync(tmp.fileno())
|
||||
except OSError as e:
|
||||
raise RuntimeError("Fsync'ing file %r failed: %s" %
|
||||
(path, e)) from e
|
||||
tmp.close()
|
||||
replace_fn(tmp.name, path)
|
||||
except BaseException:
|
||||
tmp.close()
|
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os.remove(tmp.name)
|
||||
raise
|
||||
if sync_directory:
|
||||
self._sync_directory(directory)
|
||||
|
||||
@classmethod
|
||||
def _fsync(cls, fd):
|
||||
if cls.configuration.getboolean("internal", "filesystem_fsync"):
|
||||
pathutils.fsync(fd)
|
||||
|
||||
@classmethod
|
||||
def _sync_directory(cls, path):
|
||||
"""Sync directory to disk.
|
||||
|
||||
This only works on POSIX and does nothing on other systems.
|
||||
|
||||
"""
|
||||
if not cls.configuration.getboolean("internal", "filesystem_fsync"):
|
||||
return
|
||||
if os.name == "posix":
|
||||
try:
|
||||
fd = os.open(path, 0)
|
||||
try:
|
||||
cls._fsync(fd)
|
||||
finally:
|
||||
os.close(fd)
|
||||
except OSError as e:
|
||||
raise RuntimeError("Fsync'ing directory %r failed: %s" %
|
||||
(path, e)) from e
|
||||
|
||||
@classmethod
|
||||
def _makedirs_synced(cls, filesystem_path):
|
||||
"""Recursively create a directory and its parents in a sync'ed way.
|
||||
|
||||
This method acts silently when the folder already exists.
|
||||
|
||||
"""
|
||||
if os.path.isdir(filesystem_path):
|
||||
return
|
||||
parent_filesystem_path = os.path.dirname(filesystem_path)
|
||||
# Prevent infinite loop
|
||||
if filesystem_path != parent_filesystem_path:
|
||||
# Create parent dirs recursively
|
||||
cls._makedirs_synced(parent_filesystem_path)
|
||||
# Possible race!
|
||||
os.makedirs(filesystem_path, exist_ok=True)
|
||||
cls._sync_directory(parent_filesystem_path)
|
||||
|
||||
@classmethod
|
||||
def discover(cls, path, depth="0", child_context_manager=(
|
||||
lambda path, href=None: contextlib.ExitStack())):
|
||||
# Path should already be sanitized
|
||||
sane_path = pathutils.sanitize_path(path).strip("/")
|
||||
attributes = sane_path.split("/") if sane_path else []
|
||||
|
||||
folder = cls._get_collection_root_folder()
|
||||
# Create the root collection
|
||||
cls._makedirs_synced(folder)
|
||||
try:
|
||||
filesystem_path = pathutils.path_to_filesystem(folder, sane_path)
|
||||
except ValueError as e:
|
||||
# Path is unsafe
|
||||
logger.debug("Unsafe path %r requested from storage: %s",
|
||||
sane_path, e, exc_info=True)
|
||||
return
|
||||
|
||||
# Check if the path exists and if it leads to a collection or an item
|
||||
if not os.path.isdir(filesystem_path):
|
||||
if attributes and os.path.isfile(filesystem_path):
|
||||
href = attributes.pop()
|
||||
else:
|
||||
return
|
||||
else:
|
||||
href = None
|
||||
|
||||
sane_path = "/".join(attributes)
|
||||
collection = cls(sane_path)
|
||||
|
||||
if href:
|
||||
yield collection.get(href)
|
||||
return
|
||||
|
||||
yield collection
|
||||
|
||||
if depth == "0":
|
||||
return
|
||||
|
||||
for href in collection.list():
|
||||
with child_context_manager(sane_path, href):
|
||||
yield collection.get(href)
|
||||
|
||||
for entry in os.scandir(filesystem_path):
|
||||
if not entry.is_dir():
|
||||
continue
|
||||
href = entry.name
|
||||
if not pathutils.is_safe_filesystem_path_component(href):
|
||||
if not href.startswith(".Radicale"):
|
||||
logger.debug("Skipping collection %r in %r",
|
||||
href, sane_path)
|
||||
continue
|
||||
child_path = posixpath.join(sane_path, href)
|
||||
with child_context_manager(child_path):
|
||||
yield cls(child_path)
|
||||
|
||||
@classmethod
|
||||
def verify(cls):
|
||||
item_errors = collection_errors = 0
|
||||
|
||||
@contextlib.contextmanager
|
||||
def exception_cm(path, href=None):
|
||||
nonlocal item_errors, collection_errors
|
||||
try:
|
||||
yield
|
||||
except Exception as e:
|
||||
if href:
|
||||
item_errors += 1
|
||||
name = "item %r in %r" % (href, path.strip("/"))
|
||||
else:
|
||||
collection_errors += 1
|
||||
name = "collection %r" % path.strip("/")
|
||||
logger.error("Invalid %s: %s", name, e, exc_info=True)
|
||||
|
||||
remaining_paths = [""]
|
||||
while remaining_paths:
|
||||
path = remaining_paths.pop(0)
|
||||
logger.debug("Verifying collection %r", path)
|
||||
with exception_cm(path):
|
||||
saved_item_errors = item_errors
|
||||
collection = None
|
||||
uids = set()
|
||||
has_child_collections = False
|
||||
for item in cls.discover(path, "1", exception_cm):
|
||||
if not collection:
|
||||
collection = item
|
||||
collection.get_meta()
|
||||
continue
|
||||
if isinstance(item, storage.BaseCollection):
|
||||
has_child_collections = True
|
||||
remaining_paths.append(item.path)
|
||||
elif item.uid in uids:
|
||||
cls.logger.error(
|
||||
"Invalid item %r in %r: UID conflict %r",
|
||||
item.href, path.strip("/"), item.uid)
|
||||
else:
|
||||
uids.add(item.uid)
|
||||
logger.debug("Verified item %r in %r", item.href, path)
|
||||
if item_errors == saved_item_errors:
|
||||
collection.sync()
|
||||
if has_child_collections and collection.get_meta("tag"):
|
||||
cls.logger.error("Invalid collection %r: %r must not have "
|
||||
"child collections", path.strip("/"),
|
||||
collection.get_meta("tag"))
|
||||
return item_errors == 0 and collection_errors == 0
|
||||
|
||||
@classmethod
|
||||
def create_collection(cls, href, items=None, props=None):
|
||||
folder = cls._get_collection_root_folder()
|
||||
|
||||
# Path should already be sanitized
|
||||
sane_path = pathutils.sanitize_path(href).strip("/")
|
||||
filesystem_path = pathutils.path_to_filesystem(folder, sane_path)
|
||||
|
||||
if not props:
|
||||
cls._makedirs_synced(filesystem_path)
|
||||
return cls(sane_path)
|
||||
|
||||
parent_dir = os.path.dirname(filesystem_path)
|
||||
cls._makedirs_synced(parent_dir)
|
||||
|
||||
# Create a temporary directory with an unsafe name
|
||||
with TemporaryDirectory(
|
||||
prefix=".Radicale.tmp-", dir=parent_dir) as tmp_dir:
|
||||
# The temporary directory itself can't be renamed
|
||||
tmp_filesystem_path = os.path.join(tmp_dir, "collection")
|
||||
os.makedirs(tmp_filesystem_path)
|
||||
self = cls(sane_path, filesystem_path=tmp_filesystem_path)
|
||||
self.set_meta(props)
|
||||
if items is not None:
|
||||
if props.get("tag") == "VCALENDAR":
|
||||
self._upload_all_nonatomic(items, suffix=".ics")
|
||||
elif props.get("tag") == "VADDRESSBOOK":
|
||||
self._upload_all_nonatomic(items, suffix=".vcf")
|
||||
|
||||
# This operation is not atomic on the filesystem level but it's
|
||||
# very unlikely that one rename operations succeeds while the
|
||||
# other fails or that only one gets written to disk.
|
||||
if os.path.exists(filesystem_path):
|
||||
os.rename(filesystem_path, os.path.join(tmp_dir, "delete"))
|
||||
os.rename(tmp_filesystem_path, filesystem_path)
|
||||
cls._sync_directory(parent_dir)
|
||||
|
||||
return cls(sane_path)
|
||||
|
||||
def _upload_all_nonatomic(self, items, suffix=""):
|
||||
"""Upload a new set of items.
|
||||
|
||||
This takes a list of vobject items and
|
||||
uploads them nonatomic and without existence checks.
|
||||
|
||||
"""
|
||||
cache_folder = os.path.join(self._filesystem_path,
|
||||
".Radicale.cache", "item")
|
||||
self._makedirs_synced(cache_folder)
|
||||
hrefs = set()
|
||||
for item in items:
|
||||
uid = item.uid
|
||||
try:
|
||||
cache_content = self._item_cache_content(item)
|
||||
except Exception as e:
|
||||
raise ValueError(
|
||||
"Failed to store item %r in temporary collection %r: %s" %
|
||||
(uid, self.path, e)) from e
|
||||
href_candidates = []
|
||||
if os.name in ("nt", "posix"):
|
||||
href_candidates.append(
|
||||
lambda: uid if uid.lower().endswith(suffix.lower())
|
||||
else uid + suffix)
|
||||
href_candidates.extend((
|
||||
lambda: radicale_item.get_etag(uid).strip('"') + suffix,
|
||||
lambda: radicale_item.find_available_uid(hrefs.__contains__,
|
||||
suffix)))
|
||||
href = None
|
||||
|
||||
def replace_fn(source, target):
|
||||
nonlocal href
|
||||
while href_candidates:
|
||||
href = href_candidates.pop(0)()
|
||||
if href in hrefs:
|
||||
continue
|
||||
if not pathutils.is_safe_filesystem_path_component(href):
|
||||
if not href_candidates:
|
||||
raise pathutils.UnsafePathError(href)
|
||||
continue
|
||||
try:
|
||||
return os.replace(source, pathutils.path_to_filesystem(
|
||||
self._filesystem_path, href))
|
||||
except OSError as e:
|
||||
if href_candidates and (
|
||||
os.name == "posix" and e.errno == 22 or
|
||||
os.name == "nt" and e.errno == 123):
|
||||
continue
|
||||
raise
|
||||
|
||||
with self._atomic_write(os.path.join(self._filesystem_path, "ign"),
|
||||
newline="", sync_directory=False,
|
||||
replace_fn=replace_fn) as f:
|
||||
f.write(item.serialize())
|
||||
hrefs.add(href)
|
||||
with self._atomic_write(os.path.join(cache_folder, href), "wb",
|
||||
sync_directory=False) as f:
|
||||
pickle.dump(cache_content, f)
|
||||
self._sync_directory(cache_folder)
|
||||
self._sync_directory(self._filesystem_path)
|
||||
|
||||
@classmethod
|
||||
def move(cls, item, to_collection, to_href):
|
||||
if not pathutils.is_safe_filesystem_path_component(to_href):
|
||||
raise pathutils.UnsafePathError(to_href)
|
||||
os.replace(
|
||||
pathutils.path_to_filesystem(
|
||||
item.collection._filesystem_path, item.href),
|
||||
pathutils.path_to_filesystem(
|
||||
to_collection._filesystem_path, to_href))
|
||||
cls._sync_directory(to_collection._filesystem_path)
|
||||
if item.collection._filesystem_path != to_collection._filesystem_path:
|
||||
cls._sync_directory(item.collection._filesystem_path)
|
||||
# Move the item cache entry
|
||||
cache_folder = os.path.join(item.collection._filesystem_path,
|
||||
".Radicale.cache", "item")
|
||||
to_cache_folder = os.path.join(to_collection._filesystem_path,
|
||||
".Radicale.cache", "item")
|
||||
cls._makedirs_synced(to_cache_folder)
|
||||
try:
|
||||
os.replace(os.path.join(cache_folder, item.href),
|
||||
os.path.join(to_cache_folder, to_href))
|
||||
except FileNotFoundError:
|
||||
pass
|
||||
else:
|
||||
cls._makedirs_synced(to_cache_folder)
|
||||
if cache_folder != to_cache_folder:
|
||||
cls._makedirs_synced(cache_folder)
|
||||
# Track the change
|
||||
to_collection._update_history_etag(to_href, item)
|
||||
item.collection._update_history_etag(item.href, None)
|
||||
to_collection._clean_history_cache()
|
||||
if item.collection._filesystem_path != to_collection._filesystem_path:
|
||||
item.collection._clean_history_cache()
|
||||
|
||||
@classmethod
|
||||
def _clean_cache(cls, folder, names, max_age=None):
|
||||
"""Delete all ``names`` in ``folder`` that are older than ``max_age``.
|
||||
"""
|
||||
age_limit = time.time() - max_age if max_age is not None else None
|
||||
modified = False
|
||||
for name in names:
|
||||
if not pathutils.is_safe_filesystem_path_component(name):
|
||||
continue
|
||||
if age_limit is not None:
|
||||
try:
|
||||
# Race: Another process might have deleted the file.
|
||||
mtime = os.path.getmtime(os.path.join(folder, name))
|
||||
except FileNotFoundError:
|
||||
continue
|
||||
if mtime > age_limit:
|
||||
continue
|
||||
logger.debug("Found expired item in cache: %r", name)
|
||||
# Race: Another process might have deleted or locked the
|
||||
# file.
|
||||
try:
|
||||
os.remove(os.path.join(folder, name))
|
||||
except (FileNotFoundError, PermissionError):
|
||||
continue
|
||||
modified = True
|
||||
if modified:
|
||||
cls._sync_directory(folder)
|
||||
|
||||
def _update_history_etag(self, href, item):
|
||||
"""Updates and retrieves the history etag from the history cache.
|
||||
|
||||
The history cache contains a file for each current and deleted item
|
||||
of the collection. These files contain the etag of the item (empty
|
||||
string for deleted items) and a history etag, which is a hash over
|
||||
the previous history etag and the etag separated by "/".
|
||||
"""
|
||||
history_folder = os.path.join(self._filesystem_path,
|
||||
".Radicale.cache", "history")
|
||||
try:
|
||||
with open(os.path.join(history_folder, href), "rb") as f:
|
||||
cache_etag, history_etag = pickle.load(f)
|
||||
except (FileNotFoundError, pickle.UnpicklingError, ValueError) as e:
|
||||
if isinstance(e, (pickle.UnpicklingError, ValueError)):
|
||||
logger.warning(
|
||||
"Failed to load history cache entry %r in %r: %s",
|
||||
href, self.path, e, exc_info=True)
|
||||
cache_etag = ""
|
||||
# Initialize with random data to prevent collisions with cleaned
|
||||
# expired items.
|
||||
history_etag = binascii.hexlify(os.urandom(16)).decode("ascii")
|
||||
etag = item.etag if item else ""
|
||||
if etag != cache_etag:
|
||||
self._makedirs_synced(history_folder)
|
||||
history_etag = radicale_item.get_etag(
|
||||
history_etag + "/" + etag).strip("\"")
|
||||
try:
|
||||
# Race: Other processes might have created and locked the file.
|
||||
with self._atomic_write(os.path.join(history_folder, href),
|
||||
"wb") as f:
|
||||
pickle.dump([etag, history_etag], f)
|
||||
except PermissionError:
|
||||
pass
|
||||
return history_etag
|
||||
|
||||
def _get_deleted_history_hrefs(self):
|
||||
"""Returns the hrefs of all deleted items that are still in the
|
||||
history cache."""
|
||||
history_folder = os.path.join(self._filesystem_path,
|
||||
".Radicale.cache", "history")
|
||||
try:
|
||||
for entry in os.scandir(history_folder):
|
||||
href = entry.name
|
||||
if not pathutils.is_safe_filesystem_path_component(href):
|
||||
continue
|
||||
if os.path.isfile(os.path.join(self._filesystem_path, href)):
|
||||
continue
|
||||
yield href
|
||||
except FileNotFoundError:
|
||||
pass
|
||||
|
||||
def _clean_history_cache(self):
|
||||
# Delete all expired cache entries of deleted items.
|
||||
history_folder = os.path.join(self._filesystem_path,
|
||||
".Radicale.cache", "history")
|
||||
self._clean_cache(history_folder, self._get_deleted_history_hrefs(),
|
||||
max_age=self.configuration.getint(
|
||||
"storage", "max_sync_token_age"))
|
||||
|
||||
def sync(self, old_token=None):
|
||||
# The sync token has the form http://radicale.org/ns/sync/TOKEN_NAME
|
||||
# where TOKEN_NAME is the md5 hash of all history etags of present and
|
||||
# past items of the collection.
|
||||
def check_token_name(token_name):
|
||||
if len(token_name) != 32:
|
||||
return False
|
||||
for c in token_name:
|
||||
if c not in "0123456789abcdef":
|
||||
return False
|
||||
return True
|
||||
|
||||
old_token_name = None
|
||||
if old_token:
|
||||
# Extract the token name from the sync token
|
||||
if not old_token.startswith("http://radicale.org/ns/sync/"):
|
||||
raise ValueError("Malformed token: %r" % old_token)
|
||||
old_token_name = old_token[len("http://radicale.org/ns/sync/"):]
|
||||
if not check_token_name(old_token_name):
|
||||
raise ValueError("Malformed token: %r" % old_token)
|
||||
# Get the current state and sync-token of the collection.
|
||||
state = {}
|
||||
token_name_hash = md5()
|
||||
# Find the history of all existing and deleted items
|
||||
for href, item in chain(
|
||||
((item.href, item) for item in self.get_all()),
|
||||
((href, None) for href in self._get_deleted_history_hrefs())):
|
||||
history_etag = self._update_history_etag(href, item)
|
||||
state[href] = history_etag
|
||||
token_name_hash.update((href + "/" + history_etag).encode("utf-8"))
|
||||
token_name = token_name_hash.hexdigest()
|
||||
token = "http://radicale.org/ns/sync/%s" % token_name
|
||||
if token_name == old_token_name:
|
||||
# Nothing changed
|
||||
return token, ()
|
||||
token_folder = os.path.join(self._filesystem_path,
|
||||
".Radicale.cache", "sync-token")
|
||||
token_path = os.path.join(token_folder, token_name)
|
||||
old_state = {}
|
||||
if old_token_name:
|
||||
# load the old token state
|
||||
old_token_path = os.path.join(token_folder, old_token_name)
|
||||
try:
|
||||
# Race: Another process might have deleted the file.
|
||||
with open(old_token_path, "rb") as f:
|
||||
old_state = pickle.load(f)
|
||||
except (FileNotFoundError, pickle.UnpicklingError,
|
||||
ValueError) as e:
|
||||
if isinstance(e, (pickle.UnpicklingError, ValueError)):
|
||||
logger.warning(
|
||||
"Failed to load stored sync token %r in %r: %s",
|
||||
old_token_name, self.path, e, exc_info=True)
|
||||
# Delete the damaged file
|
||||
try:
|
||||
os.remove(old_token_path)
|
||||
except (FileNotFoundError, PermissionError):
|
||||
pass
|
||||
raise ValueError("Token not found: %r" % old_token)
|
||||
# write the new token state or update the modification time of
|
||||
# existing token state
|
||||
if not os.path.exists(token_path):
|
||||
self._makedirs_synced(token_folder)
|
||||
try:
|
||||
# Race: Other processes might have created and locked the file.
|
||||
with self._atomic_write(token_path, "wb") as f:
|
||||
pickle.dump(state, f)
|
||||
except PermissionError:
|
||||
pass
|
||||
else:
|
||||
# clean up old sync tokens and item cache
|
||||
self._clean_cache(token_folder, os.listdir(token_folder),
|
||||
max_age=self.configuration.getint(
|
||||
"storage", "max_sync_token_age"))
|
||||
self._clean_history_cache()
|
||||
else:
|
||||
# Try to update the modification time
|
||||
try:
|
||||
# Race: Another process might have deleted the file.
|
||||
os.utime(token_path)
|
||||
except FileNotFoundError:
|
||||
pass
|
||||
changes = []
|
||||
# Find all new, changed and deleted (that are still in the item cache)
|
||||
# items
|
||||
for href, history_etag in state.items():
|
||||
if history_etag != old_state.get(href):
|
||||
changes.append(href)
|
||||
# Find all deleted items that are no longer in the item cache
|
||||
for href, history_etag in old_state.items():
|
||||
if href not in state:
|
||||
changes.append(href)
|
||||
return token, changes
|
||||
|
||||
def list(self):
|
||||
for entry in os.scandir(self._filesystem_path):
|
||||
if not entry.is_file():
|
||||
continue
|
||||
href = entry.name
|
||||
if not pathutils.is_safe_filesystem_path_component(href):
|
||||
if not href.startswith(".Radicale"):
|
||||
logger.debug("Skipping item %r in %r", href, self.path)
|
||||
continue
|
||||
yield href
|
||||
|
||||
def _item_cache_hash(self, raw_text):
|
||||
_hash = md5()
|
||||
_hash.update(storage.CACHE_VERSION)
|
||||
_hash.update(raw_text)
|
||||
return _hash.hexdigest()
|
||||
|
||||
def _item_cache_content(self, item, cache_hash=None):
|
||||
text = item.serialize()
|
||||
if cache_hash is None:
|
||||
cache_hash = self._item_cache_hash(text.encode(self._encoding))
|
||||
return (cache_hash, item.uid, item.etag, text, item.name,
|
||||
item.component_name, *item.time_range)
|
||||
|
||||
def _store_item_cache(self, href, item, cache_hash=None):
|
||||
cache_folder = os.path.join(self._filesystem_path, ".Radicale.cache",
|
||||
"item")
|
||||
content = self._item_cache_content(item, cache_hash)
|
||||
self._makedirs_synced(cache_folder)
|
||||
try:
|
||||
# Race: Other processes might have created and locked the
|
||||
# file.
|
||||
with self._atomic_write(os.path.join(cache_folder, href),
|
||||
"wb") as f:
|
||||
pickle.dump(content, f)
|
||||
except PermissionError:
|
||||
pass
|
||||
return content
|
||||
|
||||
def _acquire_cache_lock(self, ns=""):
|
||||
if self._lock.locked == "w":
|
||||
return contextlib.ExitStack()
|
||||
cache_folder = os.path.join(self._filesystem_path, ".Radicale.cache")
|
||||
self._makedirs_synced(cache_folder)
|
||||
lock_path = os.path.join(cache_folder,
|
||||
".Radicale.lock" + (".%s" % ns if ns else ""))
|
||||
lock = pathutils.RwLock(lock_path)
|
||||
return lock.acquire("w")
|
||||
|
||||
def _load_item_cache(self, href, input_hash):
|
||||
cache_folder = os.path.join(self._filesystem_path, ".Radicale.cache",
|
||||
"item")
|
||||
cache_hash = uid = etag = text = name = tag = start = end = None
|
||||
try:
|
||||
with open(os.path.join(cache_folder, href), "rb") as f:
|
||||
cache_hash, *content = pickle.load(f)
|
||||
if cache_hash == input_hash:
|
||||
uid, etag, text, name, tag, start, end = content
|
||||
except FileNotFoundError as e:
|
||||
pass
|
||||
except (pickle.UnpicklingError, ValueError) as e:
|
||||
logger.warning("Failed to load item cache entry %r in %r: %s",
|
||||
href, self.path, e, exc_info=True)
|
||||
return cache_hash, uid, etag, text, name, tag, start, end
|
||||
|
||||
def _clean_item_cache(self):
|
||||
cache_folder = os.path.join(self._filesystem_path, ".Radicale.cache",
|
||||
"item")
|
||||
self._clean_cache(cache_folder, (
|
||||
e.name for e in os.scandir(cache_folder) if not
|
||||
os.path.isfile(os.path.join(self._filesystem_path, e.name))))
|
||||
|
||||
def get(self, href, verify_href=True):
|
||||
if verify_href:
|
||||
try:
|
||||
if not pathutils.is_safe_filesystem_path_component(href):
|
||||
raise pathutils.UnsafePathError(href)
|
||||
path = pathutils.path_to_filesystem(
|
||||
self._filesystem_path, href)
|
||||
except ValueError as e:
|
||||
logger.debug(
|
||||
"Can't translate name %r safely to filesystem in %r: %s",
|
||||
href, self.path, e, exc_info=True)
|
||||
return None
|
||||
else:
|
||||
path = os.path.join(self._filesystem_path, href)
|
||||
try:
|
||||
with open(path, "rb") as f:
|
||||
raw_text = f.read()
|
||||
except (FileNotFoundError, IsADirectoryError):
|
||||
return None
|
||||
except PermissionError:
|
||||
# Windows raises ``PermissionError`` when ``path`` is a directory
|
||||
if (os.name == "nt" and
|
||||
os.path.isdir(path) and os.access(path, os.R_OK)):
|
||||
return None
|
||||
raise
|
||||
# The hash of the component in the file system. This is used to check,
|
||||
# if the entry in the cache is still valid.
|
||||
input_hash = self._item_cache_hash(raw_text)
|
||||
cache_hash, uid, etag, text, name, tag, start, end = \
|
||||
self._load_item_cache(href, input_hash)
|
||||
if input_hash != cache_hash:
|
||||
with self._acquire_cache_lock("item"):
|
||||
# Lock the item cache to prevent multpile processes from
|
||||
# generating the same data in parallel.
|
||||
# This improves the performance for multiple requests.
|
||||
if self._lock.locked == "r":
|
||||
# Check if another process created the file in the meantime
|
||||
cache_hash, uid, etag, text, name, tag, start, end = \
|
||||
self._load_item_cache(href, input_hash)
|
||||
if input_hash != cache_hash:
|
||||
try:
|
||||
vobject_items = tuple(vobject.readComponents(
|
||||
raw_text.decode(self._encoding)))
|
||||
radicale_item.check_and_sanitize_items(
|
||||
vobject_items, tag=self.get_meta("tag"))
|
||||
vobject_item, = vobject_items
|
||||
temp_item = radicale_item.Item(
|
||||
collection=self, vobject_item=vobject_item)
|
||||
cache_hash, uid, etag, text, name, tag, start, end = \
|
||||
self._store_item_cache(
|
||||
href, temp_item, input_hash)
|
||||
except Exception as e:
|
||||
raise RuntimeError("Failed to load item %r in %r: %s" %
|
||||
(href, self.path, e)) from e
|
||||
# Clean cache entries once after the data in the file
|
||||
# system was edited externally.
|
||||
if not self._item_cache_cleaned:
|
||||
self._item_cache_cleaned = True
|
||||
self._clean_item_cache()
|
||||
last_modified = time.strftime(
|
||||
"%a, %d %b %Y %H:%M:%S GMT",
|
||||
time.gmtime(os.path.getmtime(path)))
|
||||
# Don't keep reference to ``vobject_item``, because it requires a lot
|
||||
# of memory.
|
||||
return radicale_item.Item(
|
||||
collection=self, href=href, last_modified=last_modified, etag=etag,
|
||||
text=text, uid=uid, name=name, component_name=tag,
|
||||
time_range=(start, end))
|
||||
|
||||
def get_multi(self, hrefs):
|
||||
# It's faster to check for file name collissions here, because
|
||||
# we only need to call os.listdir once.
|
||||
files = None
|
||||
for href in hrefs:
|
||||
if files is None:
|
||||
# List dir after hrefs returned one item, the iterator may be
|
||||
# empty and the for-loop is never executed.
|
||||
files = os.listdir(self._filesystem_path)
|
||||
path = os.path.join(self._filesystem_path, href)
|
||||
if (not pathutils.is_safe_filesystem_path_component(href) or
|
||||
href not in files and os.path.lexists(path)):
|
||||
logger.debug(
|
||||
"Can't translate name safely to filesystem: %r", href)
|
||||
yield (href, None)
|
||||
else:
|
||||
yield (href, self.get(href, verify_href=False))
|
||||
|
||||
def get_all(self):
|
||||
# We don't need to check for collissions, because the the file names
|
||||
# are from os.listdir.
|
||||
return (self.get(href, verify_href=False) for href in self.list())
|
||||
|
||||
def get_all_filtered(self, filters):
|
||||
tag, start, end, simple = radicale_filter.simplify_prefilters(
|
||||
filters, collection_tag=self.get_meta("tag"))
|
||||
if not tag:
|
||||
# no filter
|
||||
yield from ((item, simple) for item in self.get_all())
|
||||
return
|
||||
for item in (self.get(h, verify_href=False) for h in self.list()):
|
||||
istart, iend = item.time_range
|
||||
if tag == item.component_name and istart < end and iend > start:
|
||||
yield item, simple and (start <= istart or iend <= end)
|
||||
|
||||
def upload(self, href, item):
|
||||
if not pathutils.is_safe_filesystem_path_component(href):
|
||||
raise pathutils.UnsafePathError(href)
|
||||
try:
|
||||
self._store_item_cache(href, item)
|
||||
except Exception as e:
|
||||
raise ValueError("Failed to store item %r in collection %r: %s" %
|
||||
(href, self.path, e)) from e
|
||||
path = pathutils.path_to_filesystem(self._filesystem_path, href)
|
||||
with self._atomic_write(path, newline="") as fd:
|
||||
fd.write(item.serialize())
|
||||
# Clean the cache after the actual item is stored, or the cache entry
|
||||
# will be removed again.
|
||||
self._clean_item_cache()
|
||||
# Track the change
|
||||
self._update_history_etag(href, item)
|
||||
self._clean_history_cache()
|
||||
return self.get(href, verify_href=False)
|
||||
|
||||
def delete(self, href=None):
|
||||
if href is None:
|
||||
# Delete the collection
|
||||
parent_dir = os.path.dirname(self._filesystem_path)
|
||||
try:
|
||||
os.rmdir(self._filesystem_path)
|
||||
except OSError:
|
||||
with TemporaryDirectory(
|
||||
prefix=".Radicale.tmp-", dir=parent_dir) as tmp:
|
||||
os.rename(self._filesystem_path, os.path.join(
|
||||
tmp, os.path.basename(self._filesystem_path)))
|
||||
self._sync_directory(parent_dir)
|
||||
else:
|
||||
self._sync_directory(parent_dir)
|
||||
else:
|
||||
# Delete an item
|
||||
if not pathutils.is_safe_filesystem_path_component(href):
|
||||
raise pathutils.UnsafePathError(href)
|
||||
path = pathutils.path_to_filesystem(self._filesystem_path, href)
|
||||
if not os.path.isfile(path):
|
||||
raise storage.ComponentNotFoundError(href)
|
||||
os.remove(path)
|
||||
self._sync_directory(os.path.dirname(path))
|
||||
# Track the change
|
||||
self._update_history_etag(href, None)
|
||||
self._clean_history_cache()
|
||||
|
||||
def get_meta(self, key=None):
|
||||
# reuse cached value if the storage is read-only
|
||||
if self._lock.locked == "w" or self._meta_cache is None:
|
||||
try:
|
||||
try:
|
||||
with open(self._props_path, encoding=self._encoding) as f:
|
||||
self._meta_cache = json.load(f)
|
||||
except FileNotFoundError:
|
||||
self._meta_cache = {}
|
||||
radicale_item.check_and_sanitize_props(self._meta_cache)
|
||||
except ValueError as e:
|
||||
raise RuntimeError("Failed to load properties of collection "
|
||||
"%r: %s" % (self.path, e)) from e
|
||||
return self._meta_cache.get(key) if key else self._meta_cache
|
||||
|
||||
def set_meta(self, props):
|
||||
with self._atomic_write(self._props_path, "w") as f:
|
||||
json.dump(props, f, sort_keys=True)
|
||||
|
||||
@property
|
||||
def last_modified(self):
|
||||
relevant_files = chain(
|
||||
(self._filesystem_path,),
|
||||
(self._props_path,) if os.path.exists(self._props_path) else (),
|
||||
(os.path.join(self._filesystem_path, h) for h in self.list()))
|
||||
last = max(map(os.path.getmtime, relevant_files))
|
||||
return time.strftime("%a, %d %b %Y %H:%M:%S GMT", time.gmtime(last))
|
||||
|
||||
@property
|
||||
def etag(self):
|
||||
# reuse cached value if the storage is read-only
|
||||
if self._lock.locked == "w" or self._etag_cache is None:
|
||||
self._etag_cache = super().etag
|
||||
return self._etag_cache
|
||||
|
||||
@classmethod
|
||||
@contextmanager
|
||||
def acquire_lock(cls, mode, user=None):
|
||||
with cls._lock.acquire(mode):
|
||||
yield
|
||||
# execute hook
|
||||
hook = cls.configuration.get("storage", "hook")
|
||||
if mode == "w" and hook:
|
||||
folder = os.path.expanduser(cls.configuration.get(
|
||||
"storage", "filesystem_folder"))
|
||||
logger.debug("Running hook")
|
||||
debug = logger.isEnabledFor(logging.DEBUG)
|
||||
p = subprocess.Popen(
|
||||
hook % {"user": shlex.quote(user or "Anonymous")},
|
||||
stdin=subprocess.DEVNULL,
|
||||
stdout=subprocess.PIPE if debug else subprocess.DEVNULL,
|
||||
stderr=subprocess.PIPE if debug else subprocess.DEVNULL,
|
||||
shell=True, universal_newlines=True, cwd=folder)
|
||||
stdout_data, stderr_data = p.communicate()
|
||||
if stdout_data:
|
||||
logger.debug("Captured stdout hook:\n%s", stdout_data)
|
||||
if stderr_data:
|
||||
logger.debug("Captured stderr hook:\n%s", stderr_data)
|
||||
if p.returncode != 0:
|
||||
raise subprocess.CalledProcessError(p.returncode, p.args)
|
||||
Reference in New Issue
Block a user