381 lines
11 KiB
PHP
381 lines
11 KiB
PHP
<?php
|
|
|
|
/**
|
|
* ownCloud
|
|
*
|
|
* @author Frank Karlitschek
|
|
* @copyright 2010 Frank Karlitschek karlitschek@kde.org
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE
|
|
* License as published by the Free Software Foundation; either
|
|
* version 3 of the License, or any later version.
|
|
*
|
|
* This library is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU AFFERO GENERAL PUBLIC LICENSE for more details.
|
|
*
|
|
* You should have received a copy of the GNU Affero General Public
|
|
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
|
|
*
|
|
*/
|
|
|
|
|
|
/**
|
|
* Class for abstraction of filesystem functions
|
|
* This class won't call any filesystem functions for itself but but will pass them to the correct OC_FILESTORAGE object
|
|
* this class should also handle all the file premission related stuff
|
|
*/
|
|
class OC_FILESYSTEM{
|
|
static private $storages=array();
|
|
static private $fakeRoot='';
|
|
static private $storageTypes=array();
|
|
|
|
|
|
/**
|
|
* register a storage type
|
|
* @param string type
|
|
* @param string classname
|
|
* @param array arguments an associative array in the form of name=>type (eg array('datadir'=>'string'))
|
|
*/
|
|
static public function registerStorageType($type,$classname,$arguments){
|
|
self::$storageTypes[$type]=array('type'=>$type,'classname'=>$classname,'arguments'=>$arguments);
|
|
}
|
|
|
|
/**
|
|
* check if the filesystem supports a specific storagetype
|
|
* @param string type
|
|
* @return bool
|
|
*/
|
|
static public function hasStorageType($type){
|
|
return isset(self::$storageTypes[$type]);
|
|
}
|
|
|
|
/**
|
|
* get the list of names of storagetypes that the filesystem supports
|
|
* @return array
|
|
*/
|
|
static public function getStorageTypeNames(){
|
|
return array_keys(self::$storageTypes);
|
|
}
|
|
|
|
/**
|
|
* create a new storage of a specific type
|
|
* @param string type
|
|
* @param array arguments
|
|
* @return OC_FILESTORAGE
|
|
*/
|
|
static public function createStorage($type,$arguments){
|
|
if(!self::hasStorageType($type)){
|
|
return false;
|
|
}
|
|
$className=self::$storageTypes[$type]['classname'];
|
|
if(class_exists($className)){
|
|
return new $className($arguments);
|
|
}else{
|
|
return false;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* change the root to a fake toor
|
|
* @param string fakeRoot
|
|
* @return bool
|
|
*/
|
|
static public function chroot($fakeRoot){
|
|
if($fakeRoot[0]!=='/'){
|
|
$fakeRoot='/'.$fakeRoot;
|
|
}
|
|
self::$fakeRoot=$fakeRoot;
|
|
}
|
|
|
|
/**
|
|
* get the part of the path relative to the mountpoint of the storage it's stored in
|
|
* @param string path
|
|
* @return bool
|
|
*/
|
|
static public function getInternalPath($path){
|
|
$mountPoint=self::getMountPoint($path);
|
|
$path=self::$fakeRoot.$path;
|
|
$internalPath=substr($path,strlen($mountPoint));
|
|
return $internalPath;
|
|
}
|
|
|
|
/**
|
|
* check if the current users has the right premissions to read a file
|
|
* @param string path
|
|
* @return bool
|
|
*/
|
|
static private function canRead($path){
|
|
if(substr($path,0,1)!=='/'){
|
|
$path='/'.$path;
|
|
}
|
|
if(strstr($path,'/../') || strrchr($path, '/') === '/..' ){
|
|
return false;
|
|
}
|
|
return true;//dummy untill premissions are correctly implemented, also the correcty value because for now users are locked in their seperate data dir and can read/write everything in there
|
|
}
|
|
/**
|
|
* check if the current users has the right premissions to write a file
|
|
* @param string path
|
|
* @return bool
|
|
*/
|
|
static private function canWrite($path){
|
|
if(substr($path,0,1)!=='/'){
|
|
$path='/'.$path;
|
|
}
|
|
if(strstr($path,'/../') || strrchr($path, '/') === '/..' ){
|
|
return false;
|
|
}
|
|
return true;//dummy untill premissions are correctly implemented, also the correcty value because for now users are locked in their seperate data dir and can read/write everything in there
|
|
}
|
|
|
|
/**
|
|
* mount an OC_FILESTORAGE in our virtual filesystem
|
|
* @param OC_FILESTORAGE storage
|
|
* @param string mountpoint
|
|
*/
|
|
static public function mount($storage,$mountpoint){
|
|
if(substr($mountpoint,0,1)!=='/'){
|
|
$mountpoint='/'.$mountpoint;
|
|
}
|
|
self::$storages[self::$fakeRoot.$mountpoint]=$storage;
|
|
}
|
|
|
|
/**
|
|
* get the storage object for a path
|
|
* @param string path
|
|
* @return OC_FILESTORAGE
|
|
*/
|
|
static private function getStorage($path){
|
|
$mountpoint=self::getMountPoint($path);
|
|
if($mountpoint){
|
|
return self::$storages[$mountpoint];
|
|
}
|
|
}
|
|
|
|
/**
|
|
* get the mountpoint of the storage object for a path
|
|
( note: because a storage is not always mounted inside the fakeroot, the returned mountpoint is relative to the absolute root of the filesystem and doesn't take the chroot into account
|
|
*
|
|
* @param string path
|
|
* @return string
|
|
*/
|
|
static private function getMountPoint($path){
|
|
if(!$path){
|
|
$path='/';
|
|
}
|
|
if(substr($path,0,1)!=='/'){
|
|
$path='/'.$path;
|
|
}
|
|
if(substr($path,-1)!=='/'){
|
|
$path=$path.'/';
|
|
}
|
|
$path=self::$fakeRoot.$path;
|
|
$foundMountPoint='';
|
|
foreach(self::$storages as $mountpoint=>$storage){
|
|
if(substr($mountpoint,-1)!=='/'){
|
|
$mountpoint=$mountpoint.'/';
|
|
}
|
|
if($mountpoint==$path){
|
|
return $mountpoint;
|
|
}
|
|
if(strpos($path,$mountpoint)===0 and strlen($mountpoint)>strlen($foundMountPoint)){
|
|
$foundMountPoint=$mountpoint;
|
|
}
|
|
}
|
|
return $foundMountPoint;
|
|
}
|
|
|
|
static public function mkdir($path){
|
|
$parent=substr($path,0,strrpos($path,'/'));
|
|
if(self::canWrite($parent) and $storage=self::getStorage($path)){
|
|
return $storage->mkdir(self::getInternalPath($path));
|
|
}
|
|
}
|
|
static public function rmdir($path){
|
|
if(self::canWrite($path) and $storage=self::getStorage($path)){
|
|
return $storage->rmdir(self::getInternalPath($path));
|
|
}
|
|
}
|
|
static public function opendir($path){
|
|
if(self::canRead($path) and $storage=self::getStorage($path)){
|
|
return $storage->opendir(self::getInternalPath($path));
|
|
}
|
|
}
|
|
static public function is_dir($path){
|
|
if($path=='/'){
|
|
return true;
|
|
}
|
|
if(self::canRead($path) and $storage=self::getStorage($path)){
|
|
return $storage->is_dir(self::getInternalPath($path));
|
|
}
|
|
}
|
|
static public function is_file($path){
|
|
if($path=='/'){
|
|
return false;
|
|
}
|
|
if(self::canRead($path) and $storage=self::getStorage($path)){
|
|
return $storage->is_file(self::getInternalPath($path));
|
|
}
|
|
}
|
|
static public function stat($path){
|
|
if(self::canRead($path) and $storage=self::getStorage($path)){
|
|
return $storage->stat(self::getInternalPath($path));
|
|
}
|
|
}
|
|
static public function filetype($path){
|
|
if(self::canRead($path) and $storage=self::getStorage($path)){
|
|
return $storage->filetype(self::getInternalPath($path));
|
|
}
|
|
}
|
|
static public function filesize($path){
|
|
if(self::canRead($path) and $storage=self::getStorage($path)){
|
|
return $storage->filesize(self::getInternalPath($path));
|
|
}
|
|
}
|
|
static public function readfile($path){
|
|
if(self::canRead($path) and $storage=self::getStorage($path)){
|
|
return $storage->readfile(self::getInternalPath($path));
|
|
}
|
|
}
|
|
static public function is_readable($path){
|
|
if(self::canRead($path) and $storage=self::getStorage($path)){
|
|
return $storage->is_readable(self::getInternalPath($path));
|
|
}
|
|
return false;
|
|
}
|
|
static public function is_writeable($path){
|
|
if(self::canWrite($path) and $storage=self::getStorage($path)){
|
|
return $storage->is_writeable(self::getInternalPath($path));
|
|
}
|
|
return false;
|
|
}
|
|
static public function file_exists($path){
|
|
if($path=='/'){
|
|
return true;
|
|
}
|
|
if(self::canWrite($path) and $storage=self::getStorage($path)){
|
|
return $storage->file_exists(self::getInternalPath($path));
|
|
}
|
|
return false;
|
|
}
|
|
static public function filectime($path){
|
|
if($storage=self::getStorage($path)){
|
|
return $storage->filectime(self::getInternalPath($path));
|
|
}
|
|
}
|
|
static public function filemtime($path){
|
|
if($storage=self::getStorage($path)){
|
|
return $storage->filemtime(self::getInternalPath($path));
|
|
}
|
|
}
|
|
static public function fileatime($path){
|
|
if($storage=self::getStorage($path)){
|
|
return $storage->fileatime(self::getInternalPath($path));
|
|
}
|
|
}
|
|
static public function file_get_contents($path){
|
|
if(self::canRead($path) and $storage=self::getStorage($path)){
|
|
return $storage->file_get_contents(self::getInternalPath($path));
|
|
}
|
|
}
|
|
static public function file_put_contents($path,$data){
|
|
if(self::canWrite($path) and $storage=self::getStorage($path)){
|
|
return $storage->file_put_contents(self::getInternalPath($path),$data);
|
|
}
|
|
}
|
|
static public function unlink($path){
|
|
if(self::canWrite($path) and $storage=self::getStorage($path)){
|
|
return $storage->unlink(self::getInternalPath($path));
|
|
}
|
|
}
|
|
static public function rename($path1,$path2){
|
|
if(self::canWrite($path1) and self::canWrite($path2)){
|
|
$mp1=self::getMountPoint($path1);
|
|
$mp2=self::getMountPoint($path2);
|
|
if($mp1==$mp2){
|
|
if($storage=self::getStorage($path1)){
|
|
return $storage->rename(self::getInternalPath($path1),self::getInternalPath($path2));
|
|
}
|
|
}elseif($storage1=self::getStorage($path1) and $storage2=self::getStorage($path2)){
|
|
$tmpFile=$storage1->toTmpFile(self::getInternalPath($path1));
|
|
$result=$storage2->fromTmpFile(self::getInternalPath($path2));
|
|
$storage1->unlink(self::getInternalPath($path1));
|
|
return $result;
|
|
}
|
|
}
|
|
}
|
|
static public function copy($path1,$path2){
|
|
if(self::canRead($path1) and self::canWrite($path2)){
|
|
$mp1=self::getMountPoint($path1);
|
|
$mp2=self::getMountPoint($path2);
|
|
if($mp1==$mp2){
|
|
if($storage=self::getStorage($path1)){
|
|
return $storage->copy(self::getInternalPath($path1),self::getInternalPath($path2));
|
|
}
|
|
}elseif($storage1=self::getStorage($path1) and $storage2=self::getStorage($path2)){
|
|
$tmpFile=$storage1->toTmpFile(self::getInternalPath($path1));
|
|
return $storage2->fromTmpFile(self::getInternalPath($path2));
|
|
}
|
|
}
|
|
}
|
|
static public function fopen($path,$mode){
|
|
$allowed=((strpos($path,'r')===false and strpos($path,'r+')!==false and self::canRead) or self::canWrite($path));
|
|
if($allowed){
|
|
if($storage=self::getStorage($path)){
|
|
return $storage->fopen(self::getInternalPath($path),$mode);
|
|
}
|
|
}
|
|
}
|
|
static public function toTmpFile($path){
|
|
if(self::canRead($path) and $storage=self::getStorage($path)){
|
|
return $storage->toTmpFile(self::getInternalPath($path));
|
|
}
|
|
}
|
|
static public function fromTmpFile($tmpFile,$path){
|
|
if(self::canWrite($path) and $storage=self::getStorage($path)){
|
|
return $storage->fromTmpFile($tmpFile,self::getInternalPath($path));
|
|
}
|
|
}
|
|
static public function getMimeType($path){
|
|
if(self::canRead($path) and $storage=self::getStorage($path)){
|
|
return $storage->getMimeType(self::getInternalPath($path));
|
|
}
|
|
}
|
|
static public function delTree($path){
|
|
if(self::canWrite($path) and $storage=self::getStorage($path)){
|
|
return $storage->delTree(self::getInternalPath($path));
|
|
}
|
|
}
|
|
static public function find($path){
|
|
if($storage=self::getStorage($path)){
|
|
$mp=self::getMountPoint($path);
|
|
$return=$storage->find(self::getInternalPath($path));
|
|
foreach($return as &$file){
|
|
$file=$mp.$file;
|
|
}
|
|
}
|
|
return $return;
|
|
}
|
|
static public function getTree($path){
|
|
if(self::canRead($path) and $storage=self::getStorage($path)){
|
|
$mp=self::getMountPoint($path);
|
|
$return=$storage->getTree(self::getInternalPath($path));
|
|
foreach($return as &$file){
|
|
if(substr($file,0,1)=='/'){
|
|
$file=substr($file,1);
|
|
}
|
|
$file=$mp.$file;
|
|
$file=substr($file,strlen(self::$fakeRoot));
|
|
if($file === '' || $file === false){
|
|
$file = '/';
|
|
}
|
|
}
|
|
return $return;
|
|
}
|
|
}
|
|
}
|
|
?>
|