540 lines
15 KiB
PHP
540 lines
15 KiB
PHP
<?php
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/**
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* Copyright (c) 2012 Robin Appelman <icewind@owncloud.com>
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* This file is licensed under the Affero General Public License version 3 or
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* later.
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* See the COPYING-README file.
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*/
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namespace OC\Files\Cache;
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/**
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* Metadata cache for the filesystem
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*
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* don't use this class directly if you need to get metadata, use \OC\Files\Filesystem::getFileInfo instead
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*/
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class Cache {
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const NOT_FOUND = 0;
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const PARTIAL = 1; //only partial data available, file not cached in the database
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const SHALLOW = 2; //folder in cache, but not all child files are completely scanned
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const COMPLETE = 3;
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/**
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* @var array partial data for the cache
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*/
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private $partial = array();
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/**
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* @var string
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*/
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private $storageId;
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/**
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* numeric storage id
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*
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* @var int $numericId
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*/
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private $numericId;
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private $mimetypeIds = array();
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private $mimetypes = array();
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/**
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* @param \OC\Files\Storage\Storage|string $storage
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*/
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public function __construct($storage) {
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if ($storage instanceof \OC\Files\Storage\Storage) {
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$this->storageId = $storage->getId();
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} else {
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$this->storageId = $storage;
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}
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if (strlen($this->storageId) > 64) {
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$this->storageId = md5($this->storageId);
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}
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$query = \OC_DB::prepare('SELECT `numeric_id` FROM `*PREFIX*storages` WHERE `id` = ?');
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$result = $query->execute(array($this->storageId));
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if ($row = $result->fetchRow()) {
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$this->numericId = $row['numeric_id'];
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} else {
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$query = \OC_DB::prepare('INSERT INTO `*PREFIX*storages`(`id`) VALUES(?)');
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$query->execute(array($this->storageId));
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$this->numericId = \OC_DB::insertid('*PREFIX*storages');
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}
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}
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public function getNumericStorageId() {
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return $this->numericId;
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}
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/**
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* normalize mimetypes
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*
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* @param string $mime
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* @return int
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*/
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public function getMimetypeId($mime) {
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if (!isset($this->mimetypeIds[$mime])) {
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$query = \OC_DB::prepare('SELECT `id` FROM `*PREFIX*mimetypes` WHERE `mimetype` = ?');
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$result = $query->execute(array($mime));
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if ($row = $result->fetchRow()) {
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$this->mimetypeIds[$mime] = $row['id'];
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} else {
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$query = \OC_DB::prepare('INSERT INTO `*PREFIX*mimetypes`(`mimetype`) VALUES(?)');
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$query->execute(array($mime));
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$this->mimetypeIds[$mime] = \OC_DB::insertid('*PREFIX*mimetypes');
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}
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$this->mimetypes[$this->mimetypeIds[$mime]] = $mime;
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}
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return $this->mimetypeIds[$mime];
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}
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public function getMimetype($id) {
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if (!isset($this->mimetypes[$id])) {
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$query = \OC_DB::prepare('SELECT `mimetype` FROM `*PREFIX*mimetypes` WHERE `id` = ?');
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$result = $query->execute(array($id));
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if ($row = $result->fetchRow()) {
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$this->mimetypes[$id] = $row['mimetype'];
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} else {
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return null;
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}
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}
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return $this->mimetypes[$id];
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}
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/**
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* get the stored metadata of a file or folder
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*
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* @param string/int $file
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* @return array
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*/
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public function get($file) {
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if (is_string($file) or $file == '') {
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$where = 'WHERE `storage` = ? AND `path_hash` = ?';
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$params = array($this->numericId, md5($file));
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} else { //file id
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$where = 'WHERE `fileid` = ?';
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$params = array($file);
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}
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$query = \OC_DB::prepare(
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'SELECT `fileid`, `storage`, `path`, `parent`, `name`, `mimetype`, `mimepart`, `size`, `mtime`, `encrypted`, `etag`
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FROM `*PREFIX*filecache` ' . $where);
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$result = $query->execute($params);
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$data = $result->fetchRow();
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//merge partial data
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if (!$data and is_string($file)) {
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if (isset($this->partial[$file])) {
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$data = $this->partial[$file];
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}
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} else {
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//fix types
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$data['fileid'] = (int)$data['fileid'];
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$data['size'] = (int)$data['size'];
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$data['mtime'] = (int)$data['mtime'];
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$data['encrypted'] = (bool)$data['encrypted'];
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$data['storage'] = $this->storageId;
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$data['mimetype'] = $this->getMimetype($data['mimetype']);
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$data['mimepart'] = $this->getMimetype($data['mimepart']);
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}
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return $data;
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}
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/**
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* get the metadata of all files stored in $folder
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*
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* @param string $folder
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* @return array
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*/
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public function getFolderContents($folder) {
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$fileId = $this->getId($folder);
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if ($fileId > -1) {
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$query = \OC_DB::prepare(
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'SELECT `fileid`, `storage`, `path`, `parent`, `name`, `mimetype`, `mimepart`, `size`, `mtime`, `encrypted`, `etag`
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FROM `*PREFIX*filecache` WHERE parent = ? ORDER BY `name` ASC');
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$result = $query->execute(array($fileId));
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$files = $result->fetchAll();
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foreach ($files as &$file) {
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$file['mimetype'] = $this->getMimetype($file['mimetype']);
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$file['mimepart'] = $this->getMimetype($file['mimepart']);
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}
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return $files;
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} else {
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return array();
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}
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}
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/**
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* store meta data for a file or folder
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*
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* @param string $file
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* @param array $data
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*
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* @return int file id
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*/
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public function put($file, array $data) {
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if (($id = $this->getId($file)) > -1) {
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$this->update($id, $data);
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return $id;
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} else {
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if (isset($this->partial[$file])) { //add any saved partial data
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$data = array_merge($this->partial[$file], $data);
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unset($this->partial[$file]);
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}
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$requiredFields = array('size', 'mtime', 'mimetype');
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foreach ($requiredFields as $field) {
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if (!isset($data[$field])) { //data not complete save as partial and return
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$this->partial[$file] = $data;
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return -1;
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}
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}
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$data['path'] = $file;
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$data['parent'] = $this->getParentId($file);
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$data['name'] = basename($file);
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$data['encrypted'] = isset($data['encrypted']) ? ((int)$data['encrypted']) : 0;
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list($queryParts, $params) = $this->buildParts($data);
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$queryParts[] = '`storage`';
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$params[] = $this->numericId;
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$valuesPlaceholder = array_fill(0, count($queryParts), '?');
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$query = \OC_DB::prepare('INSERT INTO `*PREFIX*filecache`(' . implode(', ', $queryParts) . ')'
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. ' VALUES(' . implode(', ', $valuesPlaceholder) . ')');
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$result = $query->execute($params);
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if (\OC_DB::isError($result)) {
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\OCP\Util::writeLog('cache', 'Insert to cache failed: '.$result, \OCP\Util::ERROR);
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}
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return (int)\OC_DB::insertid('*PREFIX*filecache');
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}
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}
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/**
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* update the metadata in the cache
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*
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* @param int $id
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* @param array $data
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*/
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public function update($id, array $data) {
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list($queryParts, $params) = $this->buildParts($data);
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$params[] = $id;
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$query = \OC_DB::prepare('UPDATE `*PREFIX*filecache` SET ' . implode(' = ?, ', $queryParts) . '=?'
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. ' WHERE fileid = ?');
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$query->execute($params);
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}
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/**
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* extract query parts and params array from data array
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*
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* @param array $data
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* @return array
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*/
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function buildParts(array $data) {
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$fields = array('path', 'parent', 'name', 'mimetype', 'size', 'mtime', 'encrypted', 'etag');
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$params = array();
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$queryParts = array();
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foreach ($data as $name => $value) {
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if (array_search($name, $fields) !== false) {
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if ($name === 'path') {
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$params[] = md5($value);
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$queryParts[] = '`path_hash`';
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} elseif ($name === 'mimetype') {
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$params[] = $this->getMimetypeId(substr($value, 0, strpos($value, '/')));
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$queryParts[] = '`mimepart`';
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$value = $this->getMimetypeId($value);
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}
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$params[] = $value;
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$queryParts[] = '`' . $name . '`';
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}
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}
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return array($queryParts, $params);
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}
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/**
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* get the file id for a file
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*
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* @param string $file
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* @return int
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*/
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public function getId($file) {
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$pathHash = md5($file);
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$query = \OC_DB::prepare('SELECT `fileid` FROM `*PREFIX*filecache` WHERE `storage` = ? AND `path_hash` = ?');
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$result = $query->execute(array($this->numericId, $pathHash));
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if ($row = $result->fetchRow()) {
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return $row['fileid'];
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} else {
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return -1;
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}
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}
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/**
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* get the id of the parent folder of a file
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*
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* @param string $file
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* @return int
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*/
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public function getParentId($file) {
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if ($file === '') {
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return -1;
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} else {
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$parent = dirname($file);
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if ($parent === '.') {
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$parent = '';
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}
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return $this->getId($parent);
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}
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}
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/**
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* check if a file is available in the cache
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*
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* @param string $file
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* @return bool
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*/
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public function inCache($file) {
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return $this->getId($file) != -1;
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}
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/**
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* remove a file or folder from the cache
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*
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* @param string $file
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*/
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public function remove($file) {
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$entry = $this->get($file);
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if ($entry['mimetype'] === 'httpd/unix-directory') {
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$children = $this->getFolderContents($file);
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foreach ($children as $child) {
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$this->remove($child['path']);
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}
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}
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$query = \OC_DB::prepare('DELETE FROM `*PREFIX*filecache` WHERE `fileid` = ?');
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$query->execute(array($entry['fileid']));
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$permissionsCache = new Permissions($this->storageId);
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$permissionsCache->remove($entry['fileid']);
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}
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/**
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* Move a file or folder in the cache
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*
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* @param string $source
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* @param string $target
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*/
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public function move($source, $target) {
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$sourceId = $this->getId($source);
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$newParentId = $this->getParentId($target);
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//find all child entries
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$query = \OC_DB::prepare('SELECT `path`, `fileid` FROM `*PREFIX*filecache` WHERE `path` LIKE ?');
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$result = $query->execute(array($source . '/%'));
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$childEntries = $result->fetchAll();
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$sourceLength = strlen($source);
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$query = \OC_DB::prepare('UPDATE `*PREFIX*filecache` SET `path` = ?, `path_hash` = ? WHERE `fileid` = ?');
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foreach ($childEntries as $child) {
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$targetPath = $target . substr($child['path'], $sourceLength);
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$query->execute(array($targetPath, md5($targetPath), $child['fileid']));
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}
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$query = \OC_DB::prepare('UPDATE `*PREFIX*filecache` SET `path` = ?, `path_hash` = ?, `parent` =?'
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. ' WHERE `fileid` = ?');
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$query->execute(array($target, md5($target), $newParentId, $sourceId));
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}
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/**
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* remove all entries for files that are stored on the storage from the cache
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*/
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public function clear() {
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$query = \OC_DB::prepare('DELETE FROM `*PREFIX*filecache` WHERE storage = ?');
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$query->execute(array($this->numericId));
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$query = \OC_DB::prepare('DELETE FROM `*PREFIX*storages` WHERE id = ?');
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$query->execute(array($this->storageId));
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}
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/**
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* @param string $file
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*
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* @return int, Cache::NOT_FOUND, Cache::PARTIAL, Cache::SHALLOW or Cache::COMPLETE
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*/
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public function getStatus($file) {
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$pathHash = md5($file);
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$query = \OC_DB::prepare('SELECT `size` FROM `*PREFIX*filecache` WHERE `storage` = ? AND `path_hash` = ?');
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$result = $query->execute(array($this->numericId, $pathHash));
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if ($row = $result->fetchRow()) {
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if ((int)$row['size'] === -1) {
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return self::SHALLOW;
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} else {
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return self::COMPLETE;
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}
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} else {
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if (isset($this->partial[$file])) {
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return self::PARTIAL;
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} else {
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return self::NOT_FOUND;
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}
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}
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}
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/**
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* search for files matching $pattern
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*
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* @param string $pattern
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* @return array of file data
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*/
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public function search($pattern) {
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$query = \OC_DB::prepare('
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SELECT `fileid`, `storage`, `path`, `parent`, `name`, `mimetype`, `mimepart`, `size`, `mtime`, `encrypted`, `etag`
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FROM `*PREFIX*filecache` WHERE `name` LIKE ? AND `storage` = ?'
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);
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$result = $query->execute(array($pattern, $this->numericId));
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$files = array();
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while ($row = $result->fetchRow()) {
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$row['mimetype'] = $this->getMimetype($row['mimetype']);
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$row['mimepart'] = $this->getMimetype($row['mimepart']);
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$files[] = $row;
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}
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return $files;
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}
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/**
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* search for files by mimetype
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*
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* @param string $mimetype
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* @return array
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*/
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public function searchByMime($mimetype) {
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if (strpos($mimetype, '/')) {
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$where = '`mimetype` = ?';
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} else {
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$where = '`mimepart` = ?';
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}
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$query = \OC_DB::prepare('
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SELECT `fileid`, `storage`, `path`, `parent`, `name`, `mimetype`, `mimepart`, `size`, `mtime`, `encrypted`, `etag`
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FROM `*PREFIX*filecache` WHERE ' . $where . ' AND `storage` = ?'
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);
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$mimetype = $this->getMimetypeId($mimetype);
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$result = $query->execute(array($mimetype, $this->numericId));
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$files = array();
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while ($row = $result->fetchRow()) {
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$row['mimetype'] = $this->getMimetype($row['mimetype']);
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$row['mimepart'] = $this->getMimetype($row['mimepart']);
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$files[] = $row;
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}
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return $files;
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}
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/**
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* update the folder size and the size of all parent folders
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*
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* @param $path
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*/
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public function correctFolderSize($path) {
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$this->calculateFolderSize($path);
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if ($path !== '') {
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$parent = dirname($path);
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if ($parent === '.') {
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$parent = '';
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}
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$this->correctFolderSize($parent);
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}
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}
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/**
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* get the size of a folder and set it in the cache
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*
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* @param string $path
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* @return int
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*/
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public function calculateFolderSize($path) {
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$id = $this->getId($path);
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if ($id === -1) {
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return 0;
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}
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$query = \OC_DB::prepare('SELECT `size` FROM `*PREFIX*filecache` WHERE `parent` = ? AND `storage` = ?');
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$result = $query->execute(array($id, $this->numericId));
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$totalSize = 0;
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$hasChilds = 0;
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while ($row = $result->fetchRow()) {
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$hasChilds = true;
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$size = (int)$row['size'];
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if ($size === -1) {
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$totalSize = -1;
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break;
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} else {
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$totalSize += $size;
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}
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}
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if ($hasChilds) {
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$this->update($id, array('size' => $totalSize));
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}
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return $totalSize;
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}
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/**
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* get all file ids on the files on the storage
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*
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* @return int[]
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*/
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public function getAll() {
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$query = \OC_DB::prepare('SELECT `fileid` FROM `*PREFIX*filecache` WHERE `storage` = ?');
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$result = $query->execute(array($this->numericId));
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$ids = array();
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while ($row = $result->fetchRow()) {
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$ids[] = $row['fileid'];
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}
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return $ids;
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}
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/**
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* find a folder in the cache which has not been fully scanned
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*
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* If multiply incomplete folders are in the cache, the one with the highest id will be returned,
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* use the one with the highest id gives the best result with the background scanner, since that is most
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* likely the folder where we stopped scanning previously
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*
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* @return string|bool the path of the folder or false when no folder matched
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*/
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public function getIncomplete() {
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$query = \OC_DB::prepare('SELECT `path` FROM `*PREFIX*filecache`'
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. ' WHERE `storage` = ? AND `size` = -1 ORDER BY `fileid` DESC LIMIT 1');
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$result = $query->execute(array($this->numericId));
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if ($row = $result->fetchRow()) {
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return $row['path'];
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} else {
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return false;
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}
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}
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/**
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* get the storage id of the storage for a file and the internal path of the file
|
|
*
|
|
* @return array, first element holding the storage id, second the path
|
|
*/
|
|
static public function getById($id) {
|
|
$query = \OC_DB::prepare('SELECT `storage`, `path` FROM `*PREFIX*filecache` WHERE `fileid` = ?');
|
|
$result = $query->execute(array($id));
|
|
if ($row = $result->fetchRow()) {
|
|
$numericId = $row['storage'];
|
|
$path = $row['path'];
|
|
} else {
|
|
return null;
|
|
}
|
|
|
|
$query = \OC_DB::prepare('SELECT `id` FROM `*PREFIX*storages` WHERE `numeric_id` = ?');
|
|
$result = $query->execute(array($numericId));
|
|
if ($row = $result->fetchRow()) {
|
|
return array($row['id'], $path);
|
|
} else {
|
|
return null;
|
|
}
|
|
}
|
|
}
|