304 lines
7.7 KiB
PHP
304 lines
7.7 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\Storage;
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/**
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* Storage backend class for providing common filesystem operation methods
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* which are not storage-backend specific.
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*
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* \OC\Files\Storage\Common is never used directly; it is extended by all other
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* storage backends, where its methods may be overridden, and additional
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* (backend-specific) methods are defined.
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*
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* Some \OC\Files\Storage\Common methods call functions which are first defined
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* in classes which extend it, e.g. $this->stat() .
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*/
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abstract class Common implements \OC\Files\Storage\Storage {
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public function __construct($parameters) {}
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public function is_dir($path) {
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return $this->filetype($path)=='dir';
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}
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public function is_file($path) {
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return $this->filetype($path)=='file';
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}
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public function filesize($path) {
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if($this->is_dir($path)) {
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return 0;//by definition
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}else{
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$stat = $this->stat($path);
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return $stat['size'];
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}
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}
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public function isCreatable($path) {
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if ($this->is_dir($path) && $this->isUpdatable($path)) {
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return true;
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}
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return false;
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}
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public function isDeletable($path) {
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return $this->isUpdatable($path);
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}
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public function isSharable($path) {
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return $this->isReadable($path);
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}
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public function getPermissions($path){
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$permissions = 0;
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if($this->isCreatable($path)){
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$permissions |= \OCP\PERMISSION_CREATE;
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}
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if($this->isReadable($path)){
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$permissions |= \OCP\PERMISSION_READ;
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}
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if($this->isUpdatable($path)){
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$permissions |= \OCP\PERMISSION_UPDATE;
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}
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if($this->isDeletable($path)){
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$permissions |= \OCP\PERMISSION_DELETE;
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}
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if($this->isSharable($path)){
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$permissions |= \OCP\PERMISSION_SHARE;
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}
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return $permissions;
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}
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public function filemtime($path) {
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$stat = $this->stat($path);
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return $stat['mtime'];
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}
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public function file_get_contents($path) {
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$handle = $this->fopen($path, "r");
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if(!$handle) {
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return false;
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}
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$size=$this->filesize($path);
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if($size==0) {
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return '';
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}
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return fread($handle, $size);
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}
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public function file_put_contents($path,$data) {
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$handle = $this->fopen($path, "w");
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return fwrite($handle, $data);
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}
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public function rename($path1,$path2) {
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if($this->copy($path1,$path2)) {
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return $this->unlink($path1);
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}else{
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return false;
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}
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}
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public function copy($path1,$path2) {
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$source=$this->fopen($path1,'r');
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$target=$this->fopen($path2,'w');
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$count=\OC_Helper::streamCopy($source,$target);
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return $count>0;
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}
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/**
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* @brief Deletes all files and folders recursively within a directory
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* @param string $directory The directory whose contents will be deleted
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* @param bool $empty Flag indicating whether directory will be emptied
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* @returns bool
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*
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* @note By default the directory specified by $directory will be
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* deleted together with its contents. To avoid this set $empty to true
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*/
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public function deleteAll( $directory, $empty = false ) {
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$directory = trim($directory,'/');
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if ( !$this->file_exists( \OCP\USER::getUser() . '/' . $directory ) || !$this->is_dir( \OCP\USER::getUser() . '/' . $directory ) ) {
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return false;
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} elseif( !$this->isReadable( \OCP\USER::getUser() . '/' . $directory ) ) {
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return false;
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} else {
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$directoryHandle = $this->opendir( \OCP\USER::getUser() . '/' . $directory );
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while ( $contents = readdir( $directoryHandle ) ) {
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if ( $contents != '.' && $contents != '..') {
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$path = $directory . "/" . $contents;
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if ( $this->is_dir( $path ) ) {
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$this->deleteAll( $path );
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} else {
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$this->unlink( \OCP\USER::getUser() .'/' . $path ); // TODO: make unlink use same system path as is_dir
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}
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}
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}
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//$this->closedir( $directoryHandle ); // TODO: implement closedir in OC_FSV
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if ( $empty == false ) {
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if ( !$this->rmdir( $directory ) ) {
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return false;
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}
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}
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return true;
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}
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}
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public function getMimeType($path) {
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if(!$this->file_exists($path)) {
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return false;
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}
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if($this->is_dir($path)) {
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return 'httpd/unix-directory';
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}
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$source=$this->fopen($path,'r');
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if(!$source) {
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return false;
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}
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$head=fread($source,8192);//8kb should suffice to determine a mimetype
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if($pos=strrpos($path,'.')) {
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$extension=substr($path,$pos);
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}else{
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$extension='';
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}
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$tmpFile=\OC_Helper::tmpFile($extension);
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file_put_contents($tmpFile,$head);
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$mime=\OC_Helper::getMimeType($tmpFile);
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unlink($tmpFile);
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return $mime;
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}
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public function hash($type,$path,$raw = false) {
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$tmpFile=$this->getLocalFile($path);
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$hash=hash($type,$tmpFile,$raw);
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unlink($tmpFile);
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return $hash;
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}
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public function search($query) {
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return $this->searchInDir($query);
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}
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public function getLocalFile($path) {
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return $this->toTmpFile($path);
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}
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private function toTmpFile($path) {//no longer in the storage api, still useful here
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$source=$this->fopen($path,'r');
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if(!$source) {
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return false;
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}
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if($pos=strrpos($path,'.')) {
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$extension=substr($path,$pos);
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}else{
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$extension='';
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}
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$tmpFile=\OC_Helper::tmpFile($extension);
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$target=fopen($tmpFile,'w');
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\OC_Helper::streamCopy($source,$target);
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return $tmpFile;
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}
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public function getLocalFolder($path) {
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$baseDir=\OC_Helper::tmpFolder();
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$this->addLocalFolder($path,$baseDir);
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return $baseDir;
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}
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private function addLocalFolder($path,$target) {
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if($dh=$this->opendir($path)) {
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while($file=readdir($dh)) {
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if($file!=='.' and $file!=='..') {
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if($this->is_dir($path.'/'.$file)) {
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mkdir($target.'/'.$file);
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$this->addLocalFolder($path.'/'.$file,$target.'/'.$file);
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}else{
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$tmp=$this->toTmpFile($path.'/'.$file);
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rename($tmp,$target.'/'.$file);
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}
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}
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}
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}
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}
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protected function searchInDir($query,$dir='') {
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$files=array();
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$dh=$this->opendir($dir);
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if($dh) {
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while($item=readdir($dh)) {
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if ($item == '.' || $item == '..') continue;
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if(strstr(strtolower($item), strtolower($query))!==false) {
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$files[]=$dir.'/'.$item;
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}
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if($this->is_dir($dir.'/'.$item)) {
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$files=array_merge($files,$this->searchInDir($query,$dir.'/'.$item));
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}
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}
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}
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return $files;
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}
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/**
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* check if a file or folder has been updated since $time
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* @param string $path
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* @param int $time
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* @return bool
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*/
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public function hasUpdated($path,$time) {
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return $this->filemtime($path)>$time;
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}
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public function getCache($path=''){
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return new \OC\Files\Cache\Cache($this);
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}
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public function getScanner($path=''){
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return new \OC\Files\Cache\Scanner($this);
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}
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public function getPermissionsCache($path=''){
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return new \OC\Files\Cache\Permissions($this);
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}
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public function getWatcher($path=''){
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return new \OC\Files\Cache\Watcher($this);
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}
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/**
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* get the owner of a path
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* @param string $path The path to get the owner
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* @return string uid or false
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*/
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public function getOwner($path) {
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return \OC_User::getUser();
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}
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/**
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* get the ETag for a file or folder
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*
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* @param string $path
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* @return string
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*/
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public function getETag($path){
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$ETagFunction = \OC_Connector_Sabre_Node::$ETagFunction;
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if($ETagFunction) {
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$hash = call_user_func($ETagFunction, $path);
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return $hash;
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}else{
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return uniqid();
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}
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}
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/**
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* clean a path, i.e. remove all redundant '.' and '..'
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* making sure that it can't point to higher than '/'
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* @param $path The path to clean
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* @return string cleaned path
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*/
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public function cleanPath($path) {
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if (strlen($path) == 0 or $path[0] != '/') {
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$path = '/' . $path;
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}
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$output = array();
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foreach (explode('/', $path) as $chunk) {
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if ($chunk == '..') {
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array_pop($output);
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} else if ($chunk == '.') {
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} else {
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$output[] = $chunk;
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}
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}
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return implode('/', $output);
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}
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}
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