571 lines
15 KiB
PHP
571 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 assiciative 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=''){
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if(self::isUpdated($path,$root)){
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if(!$root){//filesystem hooks are only valid for the default root
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OC_Hook::emit('OC_Filesystem','post_write',array('path'=>$path));
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}else{
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self::fileSystemWatcherWrite(array('path'=>$path),$root);
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}
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}
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if(!$root){
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$root=OC_Filesystem::getRoot();
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}
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if($root=='/'){
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$root='';
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}
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$path=$root.$path;
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$query=OC_DB::prepare('SELECT ctime,mtime,mimetype,size,encrypted,versioned FROM *PREFIX*fscache WHERE path=?');
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$result=$query->execute(array($path))->fetchRow();
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if(is_array($result)){
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return $result;
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}else{
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OC_Log::write('file not found in cache ('.$path.')','core',OC_Log::DEBUG);
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return false;
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}
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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=''){
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if(!$root){
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$root=OC_Filesystem::getRoot();
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}
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if($root=='/'){
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$root='';
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}
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$path=$root.$path;
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if($path=='/'){
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$parent=-1;
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}else{
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$parent=self::getFileId(dirname($path));
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}
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$id=self::getFileId($path);
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if($id!=-1){
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self::update($id,$data);
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return;
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}
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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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$user=OC_User::getUser();
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$query=OC_DB::prepare('INSERT INTO *PREFIX*fscache(parent, name, path, size, mtime, ctime, mimetype, mimepart,user) VALUES(?,?,?,?,?,?,?,?,?)');
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$query->execute(array($parent,basename($path),$path,$data['size'],$data['mtime'],$data['ctime'],$data['mimetype'],$mimePart,$user));
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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') as $attribute){
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if(isset($data[$attribute])){
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$arguments[]=$data[$attribute];
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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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$query=OC_DB::prepare('UPDATE *PREFIX*fscache SET '.implode(' , ',$queryParts).' WHERE id=?');
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$query->execute($arguments);
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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,$root=''){
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if(!$root){
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$root=OC_Filesystem::getRoot();
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}
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if($root=='/'){
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$root='';
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}
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$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=? WHERE path=?');
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$query->execute(array($newParent,basename($newPath),$newPath,$oldPath));
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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,$root=''){
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if(!$root){
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$root=OC_Filesystem::getRoot();
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}
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if($root=='/'){
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$root='';
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}
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$path=$root.$path;
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$query=OC_DB::prepare('DELETE FROM *PREFIX*fscache WHERE path=?');
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$query->execute(array($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=''){
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if(!$root){
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$root=OC_Filesystem::getRoot();
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}
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if($root=='/'){
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$root='';
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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,$root=''){
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if(self::isUpdated($path,$root)){
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self::updateFolder($path,$root);
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}
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if(!$root){
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$root=OC_Filesystem::getRoot();
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}
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if($root=='/'){
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$root='';
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}
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$path=$root.$path;
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$parent=self::getFileId($path);
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$query=OC_DB::prepare('SELECT name,ctime,mtime,mimetype,size,encrypted,versioned FROM *PREFIX*fscache WHERE parent=?');
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$result=$query->execute(array($parent))->fetchAll();
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if(is_array($result)){
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return $result;
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}else{
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OC_Log::write('file not found in cache ('.$path.')','core',OC_Log::DEBUG);
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return false;
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}
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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,$root=''){
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if(!$root){
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$root=OC_Filesystem::getRoot();
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}
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if($root=='/'){
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$root='';
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}
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$path=$root.$path;
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return self::getFileId($path)!=-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 $path
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* @return int
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*/
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private static function getFileId($path){
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$query=OC_DB::prepare('SELECT id FROM *PREFIX*fscache WHERE path=?');
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$result=$query->execute(array($path))->fetchRow();
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if(is_array($result)){
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return $result['id'];
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}else{
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OC_Log::write('file not found in cache ('.$path.')','core',OC_Log::DEBUG);
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return -1;
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}
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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($path=='/'){
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return -1;
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}else{
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return self::getFileId(dirname($path));
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}
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}
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/**
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* called when changes are made to files
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* @param array $params
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* @param string root (optional)
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*/
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public static function fileSystemWatcherWrite($params,$root=''){
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if(!$root){
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$view=OC_Filesystem::getView();
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}else{
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$view=new OC_FilesystemView(($root=='/')?'':$root);
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}
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$path=$params['path'];
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$fullPath=$view->getRoot().$path;
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$mimetype=$view->getMimeType($path);
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//dont use self::get here, we don't want inifinte loops when a file has changed
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$cachedSize=self::getCachedSize($path,$root);
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if($mimetype=='httpd/unix-directory'){
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if(self::inCache($path,$root)){
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$size=0;
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$parent=self::getFileId($fullPath);
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$query=OC_DB::prepare('SELECT size FROM *PREFIX*fscache WHERE parent=?');
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$query->execute(array($parent));
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while($row=$query->fetch()){
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$size+=$row['size'];
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}
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$mtime=$view->filemtime($path);
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$ctime=$view->filectime($path);
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self::put($path,array('size'=>$size,'mtime'=>$mtime,'ctime'=>$ctime,'mimetype'=>$mimetype));
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}else{
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self::scan($path,null,0,$root);
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}
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}else{
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$size=self::scanFile($path,$root);
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}
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self::increaseSize(dirname($fullPath),$size-$cachedSize);
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}
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private static function getCachedSize($path,$root){
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if(!$root){
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$root=OC_Filesystem::getRoot();
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}else{
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if($root=='/'){
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$root='';
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}
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}
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$query=OC_DB::prepare('SELECT size FROM *PREFIX*fscache WHERE path=?');
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$query->execute(array($path));
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if($row=$query->fetch()){
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return $row['size'];
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}else{//file not in cache
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return 0;
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}
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}
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/**
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* called when files are deleted
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* @param array $params
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* @param string root (optional)
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*/
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public static function fileSystemWatcherDelete($params,$root=''){
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if(!$root){
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$root=OC_Filesystem::getRoot();
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}
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if($root=='/'){
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$root='';
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}
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$path=$params['path'];
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$fullPath=$root.$path;
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if(self::getFileId($fullPath)==-1){
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return;
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}
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$size=self::getCachedSize($path,$root);
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self::increaseSize(dirname($fullPath),-$size);
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self::delete($path);
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}
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/**
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* called when files are deleted
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* @param array $params
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* @param string root (optional)
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*/
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public static function fileSystemWatcherRename($params,$root=''){
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if(!$root){
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$root=OC_Filesystem::getRoot();
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}
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if($root=='/'){
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$root='';
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}
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$oldPath=$params['oldpath'];
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$newPath=$params['newpath'];
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$fullOldPath=$root.$oldPath;
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$fullNewPath=$root.$newPath;
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if(($id=self::getFileId($fullOldPath))!=-1){
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$oldInfo=self::get($fullOldPath);
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$oldSize=$oldInfo['size'];
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}else{
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return;
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}
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$size=OC_Filesystem::filesize($oldPath);
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self::increaseSize(dirname($fullOldPath),-$oldSize);
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self::increaseSize(dirname($fullNewPath),$oldSize);
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self::move($oldPath,$newPath);
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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 $sizeDiff
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*/
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private static function increaseSize($path,$sizeDiff){
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if($sizeDiff==0) return;
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while(($id=self::getFileId($path))!=-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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$path=dirname($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 $enventSource (optional)
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* @param int count (optional)
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* @param string root (optionak)
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*/
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public static function scan($path,$eventSource=false,&$count=0,$root=''){
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if(!$root){
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$view=OC_Filesystem::getView();
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}else{
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$view=new OC_FilesystemView(($root=='/')?'':$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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if($eventSource){
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$eventSource->send('scanning',array('file'=>$file,'count'=>$count));
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}
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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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}
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}
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}
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}
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self::increaseSize($view->getRoot().$path,$totalSize);
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}
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/**
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* scan a single file
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* @param string path
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* @param string root (optional)
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* @return int size of the scanned file
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*/
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public static function scanFile($path,$root=''){
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if(!$root){
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$view=OC_Filesystem::getView();
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}else{
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$view=new OC_FilesystemView(($root=='/')?'':$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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$stat=$view->stat($path);
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$mimetype=$view->getMimeType($path);
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$stat['mimetype']=$mimetype;
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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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* fine files by mimetype
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* @param string $part1
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* @param string $part2 (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,$part2=''){
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if($part2){
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$query=OC_DB::prepare('SELECT path FROM *PREFIX*fscache WHERE mimepart=?');
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$result=$query->execute(array($part1));
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}else{
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$query=OC_DB::prepare('SELECT path FROM *PREFIX*fscache WHERE mimetype=?');
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$result=$query->execute(array($part1.'/'.$part2));
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}
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$names=array();
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while($row=$result->fetchRow()){
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$names[]=$row['path'];
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}
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return $names;
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}
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/**
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* check if a file or folder is updated outside owncloud
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* @param string path
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* @param string root (optional)
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* @return bool
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*/
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public static function isUpdated($path,$root=''){
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if(!$root){
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$root=OC_Filesystem::getRoot();
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$view=OC_Filesystem::getView();
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}else{
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if($root=='/'){
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$root='';
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}
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$view=new OC_FilesystemView($root);
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}
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$mtime=$view->filemtime($path);
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$isDir=$view->is_dir($path);
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$path=$root.$path;
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$query=OC_DB::prepare('SELECT mtime FROM *PREFIX*fscache WHERE path=?');
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$query->execute(array($path));
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if($row=$query->fetch()){
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$cachedMTime=$row['mtime'];
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return ($mtime>$cachedMTime);
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}else{//file not in cache, so it has to be updated
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return !($isDir);//new folders are handeled sperate
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}
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}
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/**
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* update the cache according to changes in the folder
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* @param string path
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* @param string root (optional)
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*/
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private static function updateFolder($path,$root=''){
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if(!$root){
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$view=OC_Filesystem::getView();
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}else{
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$view=new OC_FilesystemView(($root=='/')?'':$root);
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}
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$dh=$view->opendir($path);
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if($dh){//check for changed/new files
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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(self::isUpdated($file,$root)){
|
|
if(!$root){//filesystem hooks are only valid for the default root
|
|
OC_Hook::emit('OC_Filesystem','post_write',array('path'=>$file));
|
|
}else{
|
|
self::fileSystemWatcherWrite(array('path'=>$file),$root);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
//check for removed files, not using getFolderContent to prevent loops
|
|
$parent=self::getFileId($view->getRoot().$path);
|
|
$query=OC_DB::prepare('SELECT name FROM *PREFIX*fscache WHERE parent=?');
|
|
$result=$query->execute(array($parent));
|
|
while($row=$result->fetch()){
|
|
$file=$path.'/'.$row['name'];
|
|
if(!$view->file_exists($file)){
|
|
if(!$root){//filesystem hooks are only valid for the default root
|
|
OC_Hook::emit('OC_Filesystem','post_delete',array('path'=>$file));
|
|
}else{
|
|
self::fileSystemWatcherDelete(array('path'=>$file),$root);
|
|
}
|
|
}
|
|
}
|
|
//update the folder last, so we can calculate the size correctly
|
|
if(!$root){//filesystem hooks are only valid for the default root
|
|
OC_Hook::emit('OC_Filesystem','post_write',array('path'=>$path));
|
|
}else{
|
|
self::fileSystemWatcherWrite(array('path'=>$path),$root);
|
|
}
|
|
}
|
|
}
|
|
|
|
//watch for changes and try to keep the cache up to date
|
|
OC_Hook::connect('OC_Filesystem','post_write','OC_FileCache','fileSystemWatcherWrite');
|
|
OC_Hook::connect('OC_Filesystem','post_delete','OC_FileCache','fileSystemWatcherDelete');
|
|
OC_Hook::connect('OC_Filesystem','post_rename','OC_FileCache','fileSystemWatcherRename');
|