395 lines
12 KiB
PHP
395 lines
12 KiB
PHP
<?php
|
|
|
|
/**
|
|
* ownCloud
|
|
*
|
|
* @author Frank Karlitschek
|
|
* @copyright 2012 Frank Karlitschek frank@owncloud.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 to provide app access to files outside of the currently logged in user's data
|
|
* folder. Functions are provided to create a "view" into ownCloud's virtual file
|
|
* system, and an API similar to the oc_filesystem class is available for manipulating
|
|
* those files (including the ability to read, write, and delete files).
|
|
*
|
|
* Every view can have it's own chroot, giving it access to a part of the
|
|
* filesystem and will provide the same functionality as oc_filesystem.
|
|
|
|
* For instance an app can create a new filesystem view on a data folder belonging
|
|
* to a user other than the one logged in, so that it may change the files there
|
|
* (use case: enabling sharing of files).
|
|
*/
|
|
|
|
class OC_FilesystemView {
|
|
private $fakeRoot='';
|
|
|
|
public function __construct($root){
|
|
$this->fakeRoot=$root;
|
|
}
|
|
|
|
public function getAbsolutePath($path){
|
|
if(!$path){
|
|
$path='/';
|
|
}
|
|
if(substr($path,0,1)!=='/'){
|
|
$path='/'.$path;
|
|
}
|
|
return $this->fakeRoot.$path;
|
|
}
|
|
|
|
|
|
/**
|
|
* change the root to a fake toor
|
|
* @param string fakeRoot
|
|
* @return bool
|
|
*/
|
|
public function chroot($fakeRoot){
|
|
if(!$fakeRoot==''){
|
|
if($fakeRoot[0]!=='/'){
|
|
$fakeRoot='/'.$fakeRoot;
|
|
}
|
|
}
|
|
$this->fakeRoot=$fakeRoot;
|
|
}
|
|
|
|
/**
|
|
* get the fake root
|
|
* @return string
|
|
*/
|
|
public function getRoot(){
|
|
return $this->fakeRoot;
|
|
}
|
|
|
|
/**
|
|
* get the part of the path relative to the mountpoint of the storage it's stored in
|
|
* @param string path
|
|
* @return bool
|
|
*/
|
|
public function getInternalPath($path){
|
|
return OC_Filesystem::getInternalPath($this->getAbsolutePath($path));
|
|
}
|
|
/**
|
|
* get the storage object for a path
|
|
* @param string path
|
|
* @return OC_Filestorage
|
|
*/
|
|
public function getStorage($path){
|
|
return OC_Filesystem::getStorage($this->getAbsolutePath($path));
|
|
}
|
|
|
|
/**
|
|
* get the mountpoint of the storage object for a path
|
|
( note: because a storage is not always mounted inside the fakeroot, the returned mountpoint is relative to the absolute root of the filesystem and doesn't take the chroot into account
|
|
*
|
|
* @param string path
|
|
* @return string
|
|
*/
|
|
public function getMountPoint($path){
|
|
return OC_Filesystem::getMountPoint($this->getAbsolutePath($path));
|
|
}
|
|
|
|
/**
|
|
* return the path to a local version of the file
|
|
* we need this because we can't know if a file is stored local or not from outside the filestorage and for some purposes a local file is needed
|
|
* @param string path
|
|
* @return string
|
|
*/
|
|
public function getLocalFile($path){
|
|
$parent=substr($path,0,strrpos($path,'/'));
|
|
if(OC_Filesystem::isValidPath($parent) and $storage=$this->getStorage($path)){
|
|
return $storage->getLocalFile($this->getInternalPath($path));
|
|
}
|
|
}
|
|
|
|
/**
|
|
* the following functions operate with arguments and return values identical to those of their PHP built-in equivalents
|
|
*/
|
|
public function mkdir($path){
|
|
return $this->basicOperation('mkdir',$path,array('create','write'));
|
|
}
|
|
public function rmdir($path){
|
|
return $this->basicOperation('rmdir',$path,array('delete'));
|
|
}
|
|
public function opendir($path){
|
|
return $this->basicOperation('opendir',$path,array('read'));
|
|
}
|
|
public function is_dir($path){
|
|
if($path=='/'){
|
|
return true;
|
|
}
|
|
return $this->basicOperation('is_dir',$path);
|
|
}
|
|
public function is_file($path){
|
|
if($path=='/'){
|
|
return false;
|
|
}
|
|
return $this->basicOperation('is_file',$path);
|
|
}
|
|
public function stat($path){
|
|
return $this->basicOperation('stat',$path);
|
|
}
|
|
public function filetype($path){
|
|
return $this->basicOperation('filetype',$path);
|
|
}
|
|
public function filesize($path){
|
|
return $this->basicOperation('filesize',$path);
|
|
}
|
|
public function readfile($path){
|
|
@ob_end_clean();
|
|
$handle=$this->fopen($path,'rb');
|
|
if ($handle) {
|
|
$chunkSize = 8192;// 8 MB chunks
|
|
while (!feof($handle)) {
|
|
echo fread($handle, $chunkSize);
|
|
flush();
|
|
}
|
|
$size=$this->filesize($path);
|
|
return $size;
|
|
}
|
|
return false;
|
|
}
|
|
public function is_readable($path){
|
|
return $this->basicOperation('is_readable',$path);
|
|
}
|
|
public function is_writable($path){
|
|
return $this->basicOperation('is_writable',$path);
|
|
}
|
|
public function file_exists($path){
|
|
if($path=='/'){
|
|
return true;
|
|
}
|
|
return $this->basicOperation('file_exists',$path);
|
|
}
|
|
public function filectime($path){
|
|
return $this->basicOperation('filectime',$path);
|
|
}
|
|
public function filemtime($path){
|
|
return $this->basicOperation('filemtime',$path);
|
|
}
|
|
public function touch($path, $mtime=null){
|
|
return $this->basicOperation('touch', $path, array('write'), $mtime);
|
|
}
|
|
public function file_get_contents($path){
|
|
return $this->basicOperation('file_get_contents',$path,array('read'));
|
|
}
|
|
public function file_put_contents($path,$data){
|
|
if(is_resource($data)){//not having to deal with streams in file_put_contents makes life easier
|
|
$exists=$this->file_exists($path);
|
|
$run=true;
|
|
if(!$exists){
|
|
OC_Hook::emit( OC_Filesystem::CLASSNAME, OC_Filesystem::signal_create, array( OC_Filesystem::signal_param_path => $path, OC_Filesystem::signal_param_run => &$run));
|
|
}
|
|
OC_Hook::emit( OC_Filesystem::CLASSNAME, OC_Filesystem::signal_write, array( OC_Filesystem::signal_param_path => $path, OC_Filesystem::signal_param_run => &$run));
|
|
if(!$run){
|
|
return false;
|
|
}
|
|
$target=$this->fopen($path,'w');
|
|
if($target){
|
|
$count=OC_Helper::streamCopy($data,$target);
|
|
fclose($target);
|
|
fclose($data);
|
|
if(!$exists){
|
|
OC_Hook::emit( OC_Filesystem::CLASSNAME, OC_Filesystem::signal_post_create, array( OC_Filesystem::signal_param_path => $path));
|
|
}
|
|
OC_Hook::emit( OC_Filesystem::CLASSNAME, OC_Filesystem::signal_post_write, array( OC_Filesystem::signal_param_path => $path));
|
|
return $count>0;
|
|
}else{
|
|
return false;
|
|
}
|
|
}else{
|
|
return $this->basicOperation('file_put_contents',$path,array('create','write'),$data);
|
|
}
|
|
}
|
|
public function unlink($path){
|
|
return $this->basicOperation('unlink',$path,array('delete'));
|
|
}
|
|
public function rename($path1,$path2){
|
|
if(OC_FileProxy::runPreProxies('rename',$path1,$path2) and OC_Filesystem::isValidPath($path2)){
|
|
$run=true;
|
|
OC_Hook::emit( OC_Filesystem::CLASSNAME, OC_Filesystem::signal_rename, array( OC_Filesystem::signal_param_oldpath => $path1 , OC_Filesystem::signal_param_newpath=>$path2, OC_Filesystem::signal_param_run => &$run));
|
|
if($run){
|
|
$mp1=$this->getMountPoint($path1);
|
|
$mp2=$this->getMountPoint($path2);
|
|
if($mp1==$mp2){
|
|
if($storage=$this->getStorage($path1)){
|
|
$result=$storage->rename($this->getInternalPath($path1),$this->getInternalPath($path2));
|
|
}
|
|
}else{
|
|
$source=$this->fopen($path1,'r');
|
|
$target=$this->fopen($path2,'w');
|
|
$count=OC_Helper::streamCopy($data,$target);
|
|
$storage1=$this->getStorage($path1);
|
|
$storage1->unlink($this->getInternalPath($path1));
|
|
$result=$count>0;
|
|
}
|
|
OC_Hook::emit( OC_Filesystem::CLASSNAME, OC_Filesystem::signal_post_rename, array( OC_Filesystem::signal_param_oldpath => $path1, OC_Filesystem::signal_param_newpath=>$path2));
|
|
return $result;
|
|
}
|
|
}
|
|
}
|
|
public function copy($path1,$path2){
|
|
if(OC_FileProxy::runPreProxies('copy',$path1,$path2) and $this->is_readable($path1) and OC_Filesystem::isValidPath($path2)){
|
|
$run=true;
|
|
OC_Hook::emit( OC_Filesystem::CLASSNAME, OC_Filesystem::signal_copy, array( OC_Filesystem::signal_param_oldpath => $path1 , OC_Filesystem::signal_param_newpath=>$path2, OC_Filesystem::signal_param_run => &$run));
|
|
$exists=$this->file_exists($path2);
|
|
if($run and !$exists){
|
|
OC_Hook::emit( OC_Filesystem::CLASSNAME, OC_Filesystem::signal_create, array( OC_Filesystem::signal_param_path => $path2, OC_Filesystem::signal_param_run => &$run));
|
|
}
|
|
if($run){
|
|
OC_Hook::emit( OC_Filesystem::CLASSNAME, OC_Filesystem::signal_write, array( OC_Filesystem::signal_param_path => $path2, OC_Filesystem::signal_param_run => &$run));
|
|
}
|
|
if($run){
|
|
$mp1=$this->getMountPoint($path1);
|
|
$mp2=$this->getMountPoint($path2);
|
|
if($mp1==$mp2){
|
|
if($storage=$this->getStorage($path1)){
|
|
$result=$storage->copy($this->getInternalPath($path1),$this->getInternalPath($path2));
|
|
}
|
|
}else{
|
|
$source=$this->fopen($path1,'r');
|
|
$target=$this->fopen($path2,'w');
|
|
$count=OC_Helper::streamCopy($data,$target);
|
|
}
|
|
OC_Hook::emit( OC_Filesystem::CLASSNAME, OC_Filesystem::signal_post_copy, array( OC_Filesystem::signal_param_oldpath => $path1 , OC_Filesystem::signal_param_newpath=>$path2));
|
|
if(!$exists){
|
|
OC_Hook::emit( OC_Filesystem::CLASSNAME, OC_Filesystem::signal_post_create, array( OC_Filesystem::signal_param_path => $path2));
|
|
}
|
|
OC_Hook::emit( OC_Filesystem::CLASSNAME, OC_Filesystem::signal_post_write, array( OC_Filesystem::signal_param_path => $path2));
|
|
return $result;
|
|
}
|
|
}
|
|
}
|
|
public function fopen($path,$mode){
|
|
$hooks=array();
|
|
switch($mode){
|
|
case 'r':
|
|
case 'rb':
|
|
$hooks[]='read';
|
|
break;
|
|
case 'r+':
|
|
case 'rb+':
|
|
case 'w+':
|
|
case 'wb+':
|
|
case 'x+':
|
|
case 'xb+':
|
|
case 'a+':
|
|
case 'ab+':
|
|
$hooks[]='read';
|
|
$hooks[]='write';
|
|
break;
|
|
case 'w':
|
|
case 'wb':
|
|
case 'x':
|
|
case 'xb':
|
|
case 'a':
|
|
case 'ab':
|
|
$hooks[]='write';
|
|
break;
|
|
default:
|
|
OC_Log::write('core','invalid mode ('.$mode.') for '.$path,OC_Log::ERROR);
|
|
}
|
|
|
|
return $this->basicOperation('fopen',$path,$hooks,$mode);
|
|
}
|
|
public function toTmpFile($path){
|
|
if(OC_Filesystem::isValidPath($path)){
|
|
$source=$this->fopen($path,'r');
|
|
if($source){
|
|
$extension='';
|
|
$extOffset=strpos($path,'.');
|
|
if($extOffset !== false) {
|
|
$extension=substr($path,strrpos($path,'.'));
|
|
}
|
|
$tmpFile=OC_Helper::tmpFile($extension);
|
|
file_put_contents($tmpFile,$source);
|
|
return $tmpFile;
|
|
}
|
|
}
|
|
}
|
|
public function fromTmpFile($tmpFile,$path){
|
|
if(OC_Filesystem::isValidPath($path)){
|
|
if(!$tmpFile){
|
|
debug_print_backtrace();
|
|
}
|
|
$source=fopen($tmpFile,'r');
|
|
if($source){
|
|
$this->file_put_contents($path,$source);
|
|
unlink($tmpFile);
|
|
return true;
|
|
}else{
|
|
}
|
|
}else{
|
|
return false;
|
|
}
|
|
}
|
|
|
|
public function getMimeType($path){
|
|
return $this->basicOperation('getMimeType',$path);
|
|
}
|
|
public function hash($type,$path){
|
|
return $this->basicOperation('hash',$path,array('read'));
|
|
}
|
|
|
|
public function free_space($path='/'){
|
|
return $this->basicOperation('free_space',$path);
|
|
}
|
|
|
|
/**
|
|
* abstraction for running most basic operations
|
|
* @param string $operation
|
|
* @param string #path
|
|
* @param array (optional) hooks
|
|
* @param mixed (optional) $extraParam
|
|
* @return mixed
|
|
*/
|
|
private function basicOperation($operation,$path,$hooks=array(),$extraParam=null){
|
|
if(OC_FileProxy::runPreProxies($operation,$path, $extraParam) and OC_Filesystem::isValidPath($path)){
|
|
$internalPath=$this->getInternalPath($path);
|
|
$run=true;
|
|
if(OC_Filesystem::$loaded and $this->fakeRoot==OC_Filesystem::getRoot()){
|
|
foreach($hooks as $hook){
|
|
if($hook!='read'){
|
|
OC_Hook::emit( OC_Filesystem::CLASSNAME, $hook, array( OC_Filesystem::signal_param_path => $path, OC_Filesystem::signal_param_run => &$run));
|
|
}else{
|
|
OC_Hook::emit( OC_Filesystem::CLASSNAME, $hook, array( OC_Filesystem::signal_param_path => $path));
|
|
}
|
|
}
|
|
}
|
|
if($run and $storage=$this->getStorage($path)){
|
|
if(!is_null($extraParam)){
|
|
$result=$storage->$operation($internalPath,$extraParam);
|
|
}else{
|
|
$result=$storage->$operation($internalPath);
|
|
}
|
|
$result=OC_FileProxy::runPostProxies($operation,$path,$result);
|
|
if(OC_Filesystem::$loaded and $this->fakeRoot==OC_Filesystem::getRoot()){
|
|
if($operation!='fopen'){//no post hooks for fopen, the file stream is still open
|
|
foreach($hooks as $hook){
|
|
if($hook!='read'){
|
|
OC_Hook::emit( OC_Filesystem::CLASSNAME, 'post_'.$hook, array( OC_Filesystem::signal_param_path => $path));
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return $result;
|
|
}
|
|
}
|
|
return null;
|
|
}
|
|
}
|