496 lines
15 KiB
PHP
496 lines
15 KiB
PHP
<?php
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/**
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* @author Robin Appelman
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* @copyright 2011 Robin Appelman icewind1991@gmail.com
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE
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* License as published by the Free Software Foundation; either
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* version 3 of the License, or 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 AFFERO GENERAL PUBLIC LICENSE for more details.
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*
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* You should have received a copy of the GNU Affero General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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/**
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* provide caching for filesystem info in the database
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*
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* not used by OC_Filesystem for reading filesystem info,
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* instread apps should use OC_FileCache::get where possible
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*
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* It will try to keep the data up to date but changes from outside ownCloud can invalidate the cache
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*/
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class OC_FileCache{
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/**
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* get the filesystem info from the cache
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* @param string path
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* @param string root (optional)
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* @return array
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*
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* returns an associative array with the following keys:
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* - size
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* - mtime
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* - ctime
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* - mimetype
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* - encrypted
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* - versioned
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*/
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public static function get($path,$root=false) {
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if(OC_FileCache_Update::hasUpdated($path,$root)) {
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if($root===false) {//filesystem hooks are only valid for the default root
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OC_Hook::emit('OC_Filesystem','post_write',array('path'=>$path));
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}else{
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OC_FileCache_Update::update($path,$root);
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}
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}
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return OC_FileCache_Cached::get($path,$root);
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}
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/**
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* put filesystem info in the cache
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* @param string $path
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* @param array data
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* @param string root (optional)
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*
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* $data is an assiciative array in the same format as returned by get
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*/
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public static function put($path,$data,$root=false) {
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if($root===false) {
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$root=OC_Filesystem::getRoot();
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}
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$fullpath=$root.$path;
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$parent=self::getParentId($fullpath);
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$id=self::getId($fullpath,'');
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if(isset(OC_FileCache_Cached::$savedData[$fullpath])) {
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$data=array_merge(OC_FileCache_Cached::$savedData[$fullpath],$data);
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unset(OC_FileCache_Cached::$savedData[$fullpath]);
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}
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if($id!=-1) {
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self::update($id,$data);
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return;
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}
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// add parent directory to the file cache if it does not exist yet.
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if ($parent == -1 && $fullpath != $root) {
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$parentDir = substr(dirname($path), 0, strrpos(dirname($path), DIRECTORY_SEPARATOR));
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self::scanFile($parentDir);
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$parent = self::getParentId($fullpath);
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}
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if(!isset($data['size']) or !isset($data['mtime'])) {//save incomplete data for the next time we write it
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OC_FileCache_Cached::$savedData[$fullpath]=$data;
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return;
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}
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if(!isset($data['encrypted'])) {
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$data['encrypted']=false;
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}
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if(!isset($data['versioned'])) {
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$data['versioned']=false;
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}
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$mimePart=dirname($data['mimetype']);
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$data['size']=(int)$data['size'];
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$data['ctime']=(int)$data['mtime'];
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$data['writable']=(int)$data['writable'];
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$data['encrypted']=(int)$data['encrypted'];
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$data['versioned']=(int)$data['versioned'];
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$user=OC_User::getUser();
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$query=OC_DB::prepare('INSERT INTO `*PREFIX*fscache`(`parent`, `name`, `path`, `path_hash`, `size`, `mtime`, `ctime`, `mimetype`, `mimepart`,`user`,`writable`,`encrypted`,`versioned`) VALUES(?,?,?,?,?,?,?,?,?,?,?,?,?)');
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$result=$query->execute(array($parent,basename($fullpath),$fullpath,md5($fullpath),$data['size'],$data['mtime'],$data['ctime'],$data['mimetype'],$mimePart,$user,$data['writable'],$data['encrypted'],$data['versioned']));
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if(OC_DB::isError($result)) {
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OC_Log::write('files','error while writing file('.$fullpath.') to cache',OC_Log::ERROR);
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}
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if($cache=OC_Cache::getUserCache(true)) {
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$cache->remove('fileid/'.$fullpath);//ensure we don't have -1 cached
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}
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}
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/**
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* update filesystem info of a file
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* @param int $id
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* @param array $data
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*/
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private static function update($id,$data) {
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$arguments=array();
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$queryParts=array();
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foreach(array('size','mtime','ctime','mimetype','encrypted','versioned','writable') as $attribute) {
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if(isset($data[$attribute])) {
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//Convert to int it args are false
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if($data[$attribute] === false) {
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$arguments[] = 0;
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}else{
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$arguments[] = $data[$attribute];
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}
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$queryParts[]='`'.$attribute.'`=?';
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}
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}
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if(isset($data['mimetype'])) {
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$arguments[]=dirname($data['mimetype']);
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$queryParts[]='`mimepart`=?';
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}
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$arguments[]=$id;
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$sql = 'UPDATE `*PREFIX*fscache` SET '.implode(' , ',$queryParts).' WHERE `id`=?';
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$query=OC_DB::prepare($sql);
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$result=$query->execute($arguments);
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if(OC_DB::isError($result)) {
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OC_Log::write('files','error while updating file('.$id.') in cache',OC_Log::ERROR);
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}
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}
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/**
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* register a file move in the cache
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* @param string oldPath
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* @param string newPath
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* @param string root (optional)
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*/
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public static function move($oldPath,$newPath,$root=false) {
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if($root===false) {
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$root=OC_Filesystem::getRoot();
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}
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// If replacing an existing file, delete the file
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if (self::inCache($newPath, $root)) {
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self::delete($newPath, $root);
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}
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$oldPath=$root.$oldPath;
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$newPath=$root.$newPath;
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$newParent=self::getParentId($newPath);
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$query=OC_DB::prepare('UPDATE `*PREFIX*fscache` SET `parent`=? ,`name`=?, `path`=?, `path_hash`=? WHERE `path_hash`=?');
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$query->execute(array($newParent,basename($newPath),$newPath,md5($newPath),md5($oldPath)));
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if(($cache=OC_Cache::getUserCache(true)) && $cache->hasKey('fileid/'.$oldPath)) {
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$cache->set('fileid/'.$newPath,$cache->get('fileid/'.$oldPath));
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$cache->remove('fileid/'.$oldPath);
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}
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$query=OC_DB::prepare('SELECT `path` FROM `*PREFIX*fscache` WHERE `path` LIKE ?');
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$oldLength=strlen($oldPath);
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$updateQuery=OC_DB::prepare('UPDATE `*PREFIX*fscache` SET `path`=?, `path_hash`=? WHERE `path_hash`=?');
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while($row= $query->execute(array($oldPath.'/%'))->fetchRow()) {
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$old=$row['path'];
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$new=$newPath.substr($old,$oldLength);
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$updateQuery->execute(array($new,md5($new),md5($old)));
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if(($cache=OC_Cache::getUserCache(true)) && $cache->hasKey('fileid/'.$old)) {
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$cache->set('fileid/'.$new,$cache->get('fileid/'.$old));
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$cache->remove('fileid/'.$old);
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}
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}
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}
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/**
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* delete info from the cache
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* @param string path
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* @param string root (optional)
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*/
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public static function delete($path,$root=false) {
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if($root===false) {
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$root=OC_Filesystem::getRoot();
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}
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$query=OC_DB::prepare('DELETE FROM `*PREFIX*fscache` WHERE `path_hash`=?');
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$query->execute(array(md5($root.$path)));
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//delete everything inside the folder
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$query=OC_DB::prepare('DELETE FROM `*PREFIX*fscache` WHERE `path` LIKE ?');
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$query->execute(array($root.$path.'/%'));
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OC_Cache::remove('fileid/'.$root.$path);
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}
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/**
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* return array of filenames matching the querty
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* @param string $query
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* @param boolean $returnData
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* @param string root (optional)
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* @return array of filepaths
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*/
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public static function search($search,$returnData=false,$root=false) {
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if($root===false) {
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$root=OC_Filesystem::getRoot();
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}
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$rootLen=strlen($root);
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if(!$returnData) {
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$query=OC_DB::prepare('SELECT `path` FROM `*PREFIX*fscache` WHERE `name` LIKE ? AND `user`=?');
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}else{
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$query=OC_DB::prepare('SELECT * FROM `*PREFIX*fscache` WHERE `name` LIKE ? AND `user`=?');
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}
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$result=$query->execute(array("%$search%",OC_User::getUser()));
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$names=array();
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while($row=$result->fetchRow()) {
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if(!$returnData) {
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$names[]=substr($row['path'],$rootLen);
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}else{
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$row['path']=substr($row['path'],$rootLen);
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$names[]=$row;
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}
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}
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return $names;
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}
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/**
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* get all files and folders in a folder
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* @param string path
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* @param string root (optional)
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* @return array
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*
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* returns an array of assiciative arrays with the following keys:
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* - name
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* - size
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* - mtime
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* - ctime
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* - mimetype
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* - encrypted
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* - versioned
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*/
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public static function getFolderContent($path,$root=false,$mimetype_filter='') {
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if(OC_FileCache_Update::hasUpdated($path,$root,true)) {
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OC_FileCache_Update::updateFolder($path,$root);
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}
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return OC_FileCache_Cached::getFolderContent($path,$root,$mimetype_filter);
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}
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/**
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* check if a file or folder is in the cache
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* @param string $path
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* @param string root (optional)
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* @return bool
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*/
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public static function inCache($path,$root=false) {
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return self::getId($path,$root)!=-1;
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}
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/**
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* get the file id as used in the cache
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* @param string path
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* @param string root (optional)
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* @return int
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*/
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public static function getId($path,$root=false) {
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if($root===false) {
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$root=OC_Filesystem::getRoot();
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}
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$fullPath=$root.$path;
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if(($cache=OC_Cache::getUserCache(true)) && $cache->hasKey('fileid/'.$fullPath)) {
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return $cache->get('fileid/'.$fullPath);
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}
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$query=OC_DB::prepare('SELECT `id` FROM `*PREFIX*fscache` WHERE `path_hash`=?');
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$result=$query->execute(array(md5($fullPath)));
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if(OC_DB::isError($result)) {
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OC_Log::write('files','error while getting file id of '.$path,OC_Log::ERROR);
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return -1;
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}
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$result=$result->fetchRow();
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if(is_array($result)) {
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$id=$result['id'];
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}else{
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$id=-1;
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}
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if($cache=OC_Cache::getUserCache(true)) {
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$cache->set('fileid/'.$fullPath,$id);
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}
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return $id;
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}
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/**
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* get the file path from the id, relative to the home folder of the user
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* @param int id
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* @param string user (optional)
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* @return string
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*/
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public static function getPath($id,$user='') {
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if(!$user) {
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$user=OC_User::getUser();
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}
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$query=OC_DB::prepare('SELECT `path` FROM `*PREFIX*fscache` WHERE `id`=? AND `user`=?');
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$result=$query->execute(array($id,$user));
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$row=$result->fetchRow();
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$path=$row['path'];
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$root='/'.$user.'/files';
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if(substr($path,0,strlen($root))!=$root) {
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return false;
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}
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return substr($path,strlen($root));
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}
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/**
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* get the file id of the parent folder, taking into account '/' has no parent
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* @param string $path
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* @return int
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*/
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private static function getParentId($path) {
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if($path=='/') {
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return -1;
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}else{
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return self::getId(dirname($path),'');
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}
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}
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/**
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* adjust the size of the parent folders
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* @param string $path
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* @param int $sizeDiff
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* @param string root (optinal)
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*/
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public static function increaseSize($path,$sizeDiff, $root=false) {
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if($sizeDiff==0) return;
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$id=self::getId($path,$root);
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while($id!=-1) {//walk up the filetree increasing the size of all parent folders
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$query=OC_DB::prepare('UPDATE `*PREFIX*fscache` SET `size`=`size`+? WHERE `id`=?');
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$query->execute(array($sizeDiff,$id));
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$id=self::getParentId($path);
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$path=dirname($path);
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}
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}
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/**
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* recursively scan the filesystem and fill the cache
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* @param string $path
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* @param OC_EventSource $enventSource (optional)
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* @param int count (optional)
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* @param string root (optional)
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*/
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public static function scan($path,$eventSource=false,&$count=0,$root=false) {
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if($eventSource) {
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$eventSource->send('scanning',array('file'=>$path,'count'=>$count));
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}
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$lastSend=$count;
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// NOTE: Ugly hack to prevent shared files from going into the cache (the source already exists somewhere in the cache)
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if (substr($path, 0, 7) == '/Shared') {
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return;
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}
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if($root===false) {
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$view=OC_Filesystem::getView();
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}else{
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$view=new OC_FilesystemView($root);
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}
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self::scanFile($path,$root);
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$dh=$view->opendir($path.'/');
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$totalSize=0;
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if($dh) {
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while (($filename = readdir($dh)) !== false) {
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if($filename != '.' and $filename != '..') {
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$file=$path.'/'.$filename;
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if($view->is_dir($file.'/')) {
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self::scan($file,$eventSource,$count,$root);
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}else{
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$totalSize+=self::scanFile($file,$root);
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$count++;
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if($count>$lastSend+25 and $eventSource) {
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$lastSend=$count;
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$eventSource->send('scanning',array('file'=>$path,'count'=>$count));
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}
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}
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}
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}
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}
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OC_FileCache_Update::cleanFolder($path,$root);
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self::increaseSize($path,$totalSize,$root);
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}
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/**
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* scan a single file
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* @param string path
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* @param string root (optional)
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* @return int size of the scanned file
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*/
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public static function scanFile($path,$root=false) {
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// NOTE: Ugly hack to prevent shared files from going into the cache (the source already exists somewhere in the cache)
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if (substr($path, 0, 7) == '/Shared') {
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return;
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}
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if($root===false) {
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$view=OC_Filesystem::getView();
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}else{
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$view=new OC_FilesystemView($root);
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}
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if(!$view->is_readable($path)) return; //cant read, nothing we can do
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clearstatcache();
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$mimetype=$view->getMimeType($path);
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$stat=$view->stat($path);
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if($mimetype=='httpd/unix-directory') {
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$writable=$view->is_writable($path.'/');
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}else{
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$writable=$view->is_writable($path);
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}
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$stat['mimetype']=$mimetype;
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$stat['writable']=$writable;
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if($path=='/') {
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$path='';
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}
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self::put($path,$stat,$root);
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return $stat['size'];
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}
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/**
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* find files by mimetype
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* @param string $part1
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* @param string $part2 (optional)
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* @param string root (optional)
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* @return array of file paths
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*
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* $part1 and $part2 together form the complete mimetype.
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* e.g. searchByMime('text','plain')
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*
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* seccond mimetype part can be ommited
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* e.g. searchByMime('audio')
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*/
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public static function searchByMime($part1,$part2=null,$root=false) {
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if($root===false) {
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$root=OC_Filesystem::getRoot();
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}
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$rootLen=strlen($root);
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$root .= '%';
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$user=OC_User::getUser();
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if(!$part2) {
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$query=OC_DB::prepare('SELECT `path` FROM `*PREFIX*fscache` WHERE `mimepart`=? AND `user`=? AND `path` LIKE ?');
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$result=$query->execute(array($part1,$user, $root));
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}else{
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$query=OC_DB::prepare('SELECT `path` FROM `*PREFIX*fscache` WHERE `mimetype`=? AND `user`=? AND `path` LIKE ? ');
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$result=$query->execute(array($part1.'/'.$part2,$user, $root));
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}
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$names=array();
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while($row=$result->fetchRow()) {
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$names[]=substr($row['path'],$rootLen);
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}
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return $names;
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}
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/**
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* clean old pre-path_hash entries
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*/
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public static function clean() {
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$query=OC_DB::prepare('DELETE FROM `*PREFIX*fscache` WHERE LENGTH(`path_hash`)<30');
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$query->execute();
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}
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/**
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* clear filecache entries
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* @param string user (optonal)
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*/
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public static function clear($user='') {
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if($user) {
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$query=OC_DB::prepare('DELETE FROM `*PREFIX*fscache` WHERE user=?');
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$query->execute(array($user));
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}else{
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$query=OC_DB::prepare('DELETE FROM `*PREFIX*fscache`');
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$query->execute();
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}
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}
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}
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//watch for changes and try to keep the cache up to date
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OC_Hook::connect('OC_Filesystem','post_write','OC_FileCache_Update','fileSystemWatcherWrite');
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OC_Hook::connect('OC_Filesystem','post_delete','OC_FileCache_Update','fileSystemWatcherDelete');
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OC_Hook::connect('OC_Filesystem','post_rename','OC_FileCache_Update','fileSystemWatcherRename');
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