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<?php
/**
* 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.
*/
class OC_Archive_TAR extends OC_Archive{
const PLAIN=0;
const GZIP=1;
const BZIP=2;
/**
* @var Archive_Tar tar
*/
private $tar=null;
private $path;
function __construct($source){
$types=array(null,'gz','bz');
$this->path=$source;
$this->tar=new Archive_Tar($source,$types[self::getTarType($source)]);
}
/**
* try to detect the type of tar compression
* @param string file
* @return str
*/
static public function getTarType($file){
if(strpos($file,'.')){
$extention=substr($file,strrpos($file,'.'));
switch($extention){
case 'gz':
case 'tgz':
return self::GZIP;
case 'bz':
case 'bz2':
return self::BZIP;
default:
return self::PLAIN;
}
}else{
return self::PLAIN;
}
}
/**
* add an empty folder to the archive
* @param string path
* @return bool
*/
function addFolder($path){
$tmpBase=get_temp_dir().'/';
if(substr($path,-1,1)!='/'){
$path.='/';
}
if($this->fileExists($path)){
return false;
}
mkdir($tmpBase.$path);
$result=$this->tar->addModify(array($tmpBase.$path),'',$tmpBase);
rmdir($tmpBase.$path);
return $result;
}
/**
* add a file to the archive
* @param string path
* @param string source either a local file or string data
* @return bool
*/
function addFile($path,$source=''){
if($this->fileExists($path)){
$this->remove($path);
}
if(file_exists($source)){
$header=array();
$dummy='';
$this->tar->_openAppend();
$result=$this->tar->_addfile($source,$header,$dummy,$dummy,$path);
}else{
$result=$this->tar->addString($path,$source);
}
return $result;
}
/**
* rename a file or folder in the archive
* @param string source
* @param string dest
* @return bool
*/
function rename($source,$dest){
//no proper way to delete, rename entire archive, rename file and remake archive
$tmp=OC_Helper::tmpFolder();
$this->tar->extract($tmp);
rename($tmp.$source,$tmp.$dest);
$this->tar=null;
unlink($this->path);
$types=array(null,'gz','bz');
$this->tar=new Archive_Tar($this->path,$types[self::getTarType($this->path)]);
$this->tar->createModify(array($tmp),'',$tmp.'/');
}
private function getHeader($file){
$headers=$this->tar->listContent();
foreach($headers as $header){
if($file==$header['filename'] or $file.'/'==$header['filename']){
return $header;
}
}
return null;
}
/**
* get the uncompressed size of a file in the archive
* @param string path
* @return int
*/
function filesize($path){
$stat=$this->getHeader($path);
return $stat['size'];
}
/**
* get the last modified time of a file in the archive
* @param string path
* @return int
*/
function mtime($path){
$stat=$this->getHeader($path);
return $stat['mtime'];
}
/**
* get the files in a folder
* @param path
* @return array
*/
function getFolder($path){
$files=$this->getFiles();
$folderContent=array();
$pathLength=strlen($path);
foreach($files as $file){
if(substr($file,0,$pathLength)==$path and $file!=$path){
if(strrpos(substr($file,0,-1),'/')<=$pathLength){
$folderContent[]=substr($file,$pathLength);
}
}
}
return $folderContent;
}
/**
*get all files in the archive
* @return array
*/
function getFiles(){
$headers=$this->tar->listContent();
$files=array();
foreach($headers as $header){
$files[]=$header['filename'];
}
return $files;
}
/**
* get the content of a file
* @param string path
* @return string
*/
function getFile($path){
return $this->tar->extractInString($path);
}
/**
* extract a single file from the archive
* @param string path
* @param string dest
* @return bool
*/
function extractFile($path,$dest){
$tmp=OC_Helper::tmpFolder();
if(!$this->fileExists($path)){
return false;
}
$success=$this->tar->extractList(array($path),$tmp);
if($success){
rename($tmp.$path,$dest);
}
OC_Helper::rmdirr($tmp);
return $success;
}
/**
* extract the archive
* @param string path
* @param string dest
* @return bool
*/
function extract($dest){
return $this->tar->extract($dest);
}
/**
* check if a file or folder exists in the archive
* @param string path
* @return bool
*/
function fileExists($path){
return $this->getHeader($path)!==null;
}
/**
* remove a file or folder from the archive
* @param string path
* @return bool
*/
function remove($path){
if(!$this->fileExists($path)){
return false;
}
//no proper way to delete, extract entire archive, delete file and remake archive
$tmp=OC_Helper::tmpFolder();
$this->tar->extract($tmp);
OC_Helper::rmdirr($tmp.$path);
$this->tar=null;
unlink($this->path);
$this->reopen();
$this->tar->createModify(array($tmp),'',$tmp);
return true;
}
/**
* get a file handler
* @param string path
* @param string mode
* @return resource
*/
function getStream($path,$mode){
if(strrpos($path,'.')!==false){
$ext=substr($path,strrpos($path,'.'));
}else{
$ext='';
}
$tmpFile=OC_Helper::tmpFile($ext);
if($this->fileExists($path)){
$this->extractFile($path,$tmpFile);
}elseif($mode=='r' or $mode=='rb'){
return false;
}
if($mode=='r' or $mode=='rb'){
return fopen($tmpFile,$mode);
}else{
OC_CloseStreamWrapper::$callBacks[$tmpFile]=array($this,'writeBack');
self::$tempFiles[$tmpFile]=$path;
return fopen('close://'.$tmpFile,$mode);
}
}
private static $tempFiles=array();
/**
* write back temporary files
*/
function writeBack($tmpFile){
if(isset(self::$tempFiles[$tmpFile])){
$this->addFile(self::$tempFiles[$tmpFile],$tmpFile);
unlink($tmpFile);
}
}
/**
* reopen the archive to ensure everything is written
*/
private function reopen(){
if($this->tar){
$this->tar->_close();
$this->tar=null;
}
$types=array(null,'gz','bz');
$this->tar=new Archive_Tar($this->path,$types[self::getTarType($this->path)]);
}
}
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