lib/private/Files/Cache/Wrapper/CacheJail.php
<?php
/**
* @author Daniel Jagszent <daniel@jagszent.de>
* @author Morris Jobke <hey@morrisjobke.de>
* @author Robin Appelman <icewind@owncloud.com>
* @author Robin McCorkell <robin@mccorkell.me.uk>
* @author Roeland Jago Douma <rullzer@owncloud.com>
* @author Thomas Müller <thomas.mueller@tmit.eu>
* @author Vincent Petry <pvince81@owncloud.com>
*
* @copyright Copyright (c) 2018, ownCloud GmbH
* @license AGPL-3.0
*
* This code is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* This program 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License, version 3,
* along with this program. If not, see <http://www.gnu.org/licenses/>
*
*/
namespace OC\Files\Cache\Wrapper;
use OC\Files\Cache\Cache;
/**
* Jail to a subdirectory of the wrapped cache
*/
class CacheJail extends CacheWrapper {
/**
* @var string
*/
protected $root;
/**
* @param \OCP\Files\Cache\ICache $cache
* @param string $root
*/
public function __construct($cache, $root) {
parent::__construct($cache);
$this->root = $root;
}
protected function getSourcePath($path) {
if ($path === '') {
return $this->root;
}
if ($this->root === '') {
return \ltrim($path, '/');
}
return $this->root . '/' . \ltrim($path, '/');
}
/**
* @param string $path
* @return null|string the jailed path or null if the path is outside the jail
*/
protected function getJailedPath($path) {
if ($this->root === '') {
return $path;
}
$rootLength = \strlen($this->root) + 1;
if ($path === $this->root) {
return '';
} elseif (\substr($path, 0, $rootLength) === $this->root . '/') {
return \substr($path, $rootLength);
} else {
return null;
}
}
/**
* @param array $entry
* @return array
*/
protected function formatCacheEntry($entry) {
if (isset($entry['path'])) {
$entry['path'] = $this->getJailedPath($entry['path']);
}
return $entry;
}
protected function filterCacheEntry($entry) {
if ($this->root === '') {
return true;
}
$rootLength = \strlen($this->root) + 1;
return ($entry['path'] === $this->root) or (\substr($entry['path'], 0, $rootLength) === $this->root . '/');
}
/**
* get the stored metadata of a file or folder
*
* @param string /int $file
* @return array|false
*/
public function get($file) {
if (\is_string($file) or $file == '') {
$file = $this->getSourcePath($file);
}
return parent::get($file);
}
/**
* insert meta data for a new file or folder
*
* @param string $file
* @param array $data
*
* @return int file id
* @throws \RuntimeException
*/
public function insert($file, array $data) {
return $this->cache->insert($this->getSourcePath($file), $data);
}
/**
* update the metadata in the cache
*
* @param int $id
* @param array $data
*/
public function update($id, array $data) {
$this->cache->update($id, $data);
}
/**
* get the file id for a file
*
* @param string $file
* @return int
*/
public function getId($file) {
return $this->cache->getId($this->getSourcePath($file));
}
/**
* get the id of the parent folder of a file
*
* @param string $file
* @return int
*/
public function getParentId($file) {
if ($file === '') {
return -1;
} else {
return $this->cache->getParentId($this->getSourcePath($file));
}
}
/**
* check if a file is available in the cache
*
* @param string $file
* @return bool
*/
public function inCache($file) {
return $this->cache->inCache($this->getSourcePath($file));
}
/**
* remove a file or folder from the cache
*
* @param string $file
*/
public function remove($file) {
$this->cache->remove($this->getSourcePath($file));
}
/**
* Move a file or folder in the cache
*
* @param string $source
* @param string $target
*/
public function move($source, $target) {
$this->cache->move($this->getSourcePath($source), $this->getSourcePath($target));
}
/**
* remove all entries for files that are stored on the storage from the cache
*/
public function clear() {
$this->cache->remove($this->root);
}
/**
* @param string $file
*
* @return int Cache::NOT_FOUND, Cache::PARTIAL, Cache::SHALLOW, Cache::COMPLETE or Cache::NOT_SCANNED
*/
public function getStatus($file) {
return $this->cache->getStatus($this->getSourcePath($file));
}
private function formatSearchResults($results) {
$results = \array_filter($results, [$this, 'filterCacheEntry']);
$results = \array_values($results);
return \array_map([$this, 'formatCacheEntry'], $results);
}
/**
* search for files matching $pattern
*
* @param string $pattern
* @return array an array of file data
*/
public function search($pattern) {
$results = $this->cache->search($pattern);
return $this->formatSearchResults($results);
}
/**
* search for files by mimetype
*
* @param string $mimetype
* @return array
*/
public function searchByMime($mimetype) {
$results = $this->cache->searchByMime($mimetype);
return $this->formatSearchResults($results);
}
/**
* search for files by mimetype
*
* @param string|int $tag name or tag id
* @param string $userId owner of the tags
* @return array
*/
public function searchByTag($tag, $userId) {
$results = $this->cache->searchByTag($tag, $userId);
return $this->formatSearchResults($results);
}
/**
* update the folder size and the size of all parent folders
*
* @param string|boolean $path
* @param array $data (optional) meta data of the folder
*/
public function correctFolderSize($path, $data = null) {
if ($this->cache instanceof Cache) {
$this->cache->correctFolderSize($this->getSourcePath($path), $data);
}
}
/**
* get the size of a folder and set it in the cache
*
* @param string $path
* @param array $entry (optional) meta data of the folder
* @return int
*/
public function calculateFolderSize($path, $entry = null) {
if ($this->cache instanceof Cache) {
return $this->cache->calculateFolderSize($this->getSourcePath($path), $entry);
} else {
return 0;
}
}
/**
* get all file ids on the files on the storage
*
* @return int[]
*/
public function getAll() {
// not supported
return [];
}
/**
* find a folder in the cache which has not been fully scanned
*
* If multiply incomplete folders are in the cache, the one with the highest id will be returned,
* use the one with the highest id gives the best result with the background scanner, since that is most
* likely the folder where we stopped scanning previously
*
* @return string|bool the path of the folder or false when no folder matched
*/
public function getIncomplete() {
// not supported
return false;
}
/**
* get the path of a file on this storage by it's id
*
* @param int $id
* @return string|null
*/
public function getPathById($id) {
$path = $this->cache->getPathById($id);
return $this->getJailedPath($path);
}
/**
* Move a file or folder in the cache
*
* Note that this should make sure the entries are removed from the source cache
*
* @param \OCP\Files\Cache\ICache $sourceCache
* @param string $sourcePath
* @param string $targetPath
*/
public function moveFromCache(\OCP\Files\Cache\ICache $sourceCache, $sourcePath, $targetPath) {
if ($sourceCache === $this) {
$this->move($sourcePath, $targetPath);
}
$this->cache->moveFromCache($sourceCache, $sourcePath, $this->getSourcePath($targetPath));
}
protected function getMoveInfo($path) {
return [$this->getNumericStorageId(), $this->getSourcePath($path)];
}
}