nextcloud/lib/files/storage/common.php

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<?php
/**
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* Copyright (c) 2012 Robin Appelman <icewind@owncloud.com>
* This file is licensed under the Affero General Public License version 3 or
* later.
* See the COPYING-README file.
*/
namespace OC\Files\Storage;
/**
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* Storage backend class for providing common filesystem operation methods
* which are not storage-backend specific.
*
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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
* (backend-specific) methods are defined.
*
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* Some \OC\Files\Storage\Common methods call functions which are first defined
* in classes which extend it, e.g. $this->stat() .
*/
abstract class Common implements \OC\Files\Storage\Storage {
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public function __construct($parameters) {}
public function is_dir($path) {
return $this->filetype($path)=='dir';
}
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public function is_file($path) {
return $this->filetype($path)=='file';
}
public function filesize($path) {
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if($this->is_dir($path)) {
return 0;//by definition
}else{
$stat = $this->stat($path);
return $stat['size'];
}
}
public function isCreatable($path) {
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if ($this->is_dir($path) && $this->isUpdatable($path)) {
return true;
}
return false;
}
public function isDeletable($path) {
return $this->isUpdatable($path);
}
public function isSharable($path) {
return $this->isReadable($path);
}
public function getPermissions($path){
$permissions = 0;
if($this->isCreatable($path)){
$permissions |= \OCP\PERMISSION_CREATE;
}
if($this->isReadable($path)){
$permissions |= \OCP\PERMISSION_READ;
}
if($this->isUpdatable($path)){
$permissions |= \OCP\PERMISSION_UPDATE;
}
if($this->isDeletable($path)){
$permissions |= \OCP\PERMISSION_DELETE;
}
if($this->isSharable($path)){
$permissions |= \OCP\PERMISSION_SHARE;
}
return $permissions;
}
public function filemtime($path) {
$stat = $this->stat($path);
return $stat['mtime'];
}
public function file_get_contents($path) {
$handle = $this->fopen($path, "r");
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if(!$handle) {
return false;
}
$size=$this->filesize($path);
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if($size==0) {
return '';
}
return fread($handle, $size);
}
public function file_put_contents($path,$data) {
$handle = $this->fopen($path, "w");
return fwrite($handle, $data);
}
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public function rename($path1,$path2) {
if($this->copy($path1,$path2)) {
return $this->unlink($path1);
}else{
return false;
}
}
public function copy($path1,$path2) {
$source=$this->fopen($path1,'r');
$target=$this->fopen($path2,'w');
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$count=\OC_Helper::streamCopy($source,$target);
return $count>0;
}
/**
* @brief Deletes all files and folders recursively within a directory
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* @param string $directory The directory whose contents will be deleted
* @param bool $empty Flag indicating whether directory will be emptied
* @returns bool
*
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* @note By default the directory specified by $directory will be
* deleted together with its contents. To avoid this set $empty to true
*/
public function deleteAll( $directory, $empty = false ) {
$directory = trim($directory,'/');
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if ( !$this->file_exists( \OCP\USER::getUser() . '/' . $directory ) || !$this->is_dir( \OCP\USER::getUser() . '/' . $directory ) ) {
return false;
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} elseif( !$this->isReadable( \OCP\USER::getUser() . '/' . $directory ) ) {
return false;
} else {
$directoryHandle = $this->opendir( \OCP\USER::getUser() . '/' . $directory );
while ( $contents = readdir( $directoryHandle ) ) {
if ( $contents != '.' && $contents != '..') {
$path = $directory . "/" . $contents;
if ( $this->is_dir( $path ) ) {
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$this->deleteAll( $path );
} else {
$this->unlink( \OCP\USER::getUser() .'/' . $path ); // TODO: make unlink use same system path as is_dir
}
}
}
//$this->closedir( $directoryHandle ); // TODO: implement closedir in OC_FSV
if ( $empty == false ) {
if ( !$this->rmdir( $directory ) ) {
return false;
}
}
return true;
}
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}
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public function getMimeType($path) {
if(!$this->file_exists($path)) {
return false;
}
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if($this->is_dir($path)) {
return 'httpd/unix-directory';
}
$source=$this->fopen($path,'r');
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if(!$source) {
return false;
}
$head=fread($source,8192);//8kb should suffice to determine a mimetype
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if($pos=strrpos($path,'.')) {
$extension=substr($path,$pos);
}else{
$extension='';
}
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$tmpFile=\OC_Helper::tmpFile($extension);
file_put_contents($tmpFile,$head);
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$mime=\OC_Helper::getMimeType($tmpFile);
unlink($tmpFile);
return $mime;
}
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public function hash($type,$path,$raw = false) {
$tmpFile=$this->getLocalFile($path);
$hash=hash($type,$tmpFile,$raw);
unlink($tmpFile);
return $hash;
}
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public function search($query) {
return $this->searchInDir($query);
}
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public function getLocalFile($path) {
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return $this->toTmpFile($path);
}
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private function toTmpFile($path) {//no longer in the storage api, still useful here
$source=$this->fopen($path,'r');
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if(!$source) {
return false;
}
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if($pos=strrpos($path,'.')) {
$extension=substr($path,$pos);
}else{
$extension='';
}
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$tmpFile=\OC_Helper::tmpFile($extension);
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$target=fopen($tmpFile,'w');
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\OC_Helper::streamCopy($source,$target);
return $tmpFile;
}
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public function getLocalFolder($path) {
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$baseDir=\OC_Helper::tmpFolder();
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$this->addLocalFolder($path,$baseDir);
return $baseDir;
}
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private function addLocalFolder($path,$target) {
if($dh=$this->opendir($path)) {
while($file=readdir($dh)) {
if($file!=='.' and $file!=='..') {
if($this->is_dir($path.'/'.$file)) {
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mkdir($target.'/'.$file);
$this->addLocalFolder($path.'/'.$file,$target.'/'.$file);
}else{
$tmp=$this->toTmpFile($path.'/'.$file);
rename($tmp,$target.'/'.$file);
}
}
}
}
}
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protected function searchInDir($query,$dir='') {
$files=array();
$dh=$this->opendir($dir);
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if($dh) {
while($item=readdir($dh)) {
if ($item == '.' || $item == '..') continue;
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if(strstr(strtolower($item), strtolower($query))!==false) {
$files[]=$dir.'/'.$item;
}
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if($this->is_dir($dir.'/'.$item)) {
$files=array_merge($files,$this->searchInDir($query,$dir.'/'.$item));
}
}
}
return $files;
}
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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 $time
* @return bool
*/
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public function hasUpdated($path,$time) {
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return $this->filemtime($path)>$time;
}
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public function getCache($path=''){
return new \OC\Files\Cache\Cache($this);
}
public function getScanner($path=''){
return new \OC\Files\Cache\Scanner($this);
}
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public function getPermissionsCache($path=''){
return new \OC\Files\Cache\Permissions($this);
}
public function getWatcher($path=''){
return new \OC\Files\Cache\Watcher($this);
}
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/**
* get the owner of a path
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* @param string $path The path to get the owner
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* @return string uid or false
*/
public function getOwner($path) {
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return \OC_User::getUser();
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}
/**
* get the ETag for a file or folder
*
* @param string $path
* @return string
*/
public function getETag($path){
$ETagFunction = \OC_Connector_Sabre_Node::$ETagFunction;
if($ETagFunction) {
$hash = call_user_func($ETagFunction, $path);
return $hash;
}else{
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return uniqid();
}
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}
/**
* clean a path, i.e. remove all redundant '.' and '..'
* making sure that it can't point to higher than '/'
* @param $path The path to clean
* @return string cleaned path
*/
public function cleanPath($path) {
if (strlen($path) == 0 or $path[0] != '/') {
$path = '/' . $path;
}
$output = array();
foreach (explode('/', $path) as $chunk) {
if ($chunk == '..') {
array_pop($output);
} else if ($chunk == '.') {
} else {
$output[] = $chunk;
}
}
return implode('/', $output);
}
}