nextcloud/lib/private/Archive/ZIP.php

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<?php
/**
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* @copyright Copyright (c) 2016, ownCloud, Inc.
*
* @author Arthur Schiwon <blizzz@arthur-schiwon.de>
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* @author Bart Visscher <bartv@thisnet.nl>
* @author Christopher Schäpers <kondou@ts.unde.re>
* @author Christoph Wurst <christoph@winzerhof-wurst.at>
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* @author Joas Schilling <coding@schilljs.com>
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* @author Jörn Friedrich Dreyer <jfd@butonic.de>
* @author Morris Jobke <hey@morrisjobke.de>
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* @author Robin Appelman <robin@icewind.nl>
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* @author Roeland Jago Douma <roeland@famdouma.nl>
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* @author Stefan Weil <sw@weilnetz.de>
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* @author Thomas Müller <thomas.mueller@tmit.eu>
*
* @license AGPL-3.0
*
* This code is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* This program 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, version 3,
* along with this program. If not, see <http://www.gnu.org/licenses/>
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*
*/
namespace OC\Archive;
use Icewind\Streams\CallbackWrapper;
use OCP\ILogger;
class ZIP extends Archive {
/**
* @var \ZipArchive zip
*/
private $zip = null;
private $path;
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/**
* @param string $source
*/
public function __construct($source) {
$this->path = $source;
$this->zip = new \ZipArchive();
if ($this->zip->open($source, \ZipArchive::CREATE)) {
} else {
\OCP\Util::writeLog('files_archive', 'Error while opening archive '.$source, ILogger::WARN);
}
}
/**
* add an empty folder to the archive
* @param string $path
* @return bool
*/
public function addFolder($path) {
return $this->zip->addEmptyDir($path);
}
/**
* add a file to the archive
* @param string $path
* @param string $source either a local file or string data
* @return bool
*/
public function addFile($path, $source = '') {
if ($source and $source[0] == '/' and file_exists($source)) {
$result = $this->zip->addFile($source, $path);
} else {
$result = $this->zip->addFromString($path, $source);
}
if ($result) {
$this->zip->close();//close and reopen to save the zip
$this->zip->open($this->path);
}
return $result;
}
/**
* rename a file or folder in the archive
* @param string $source
* @param string $dest
* @return boolean|null
*/
public function rename($source, $dest) {
$source = $this->stripPath($source);
$dest = $this->stripPath($dest);
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$this->zip->renameName($source, $dest);
}
/**
* get the uncompressed size of a file in the archive
* @param string $path
* @return int
*/
public function filesize($path) {
$stat = $this->zip->statName($path);
return $stat['size'];
}
/**
* get the last modified time of a file in the archive
* @param string $path
* @return int
*/
public function mtime($path) {
return filemtime($this->path);
}
/**
* get the files in a folder
* @param string $path
* @return array
*/
public function getFolder($path) {
$files = $this->getFiles();
$folderContent = [];
$pathLength = strlen($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;
}
/**
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* get all files in the archive
* @return array
*/
public function getFiles() {
$fileCount = $this->zip->numFiles;
$files = [];
for ($i = 0;$i < $fileCount;$i++) {
$files[] = $this->zip->getNameIndex($i);
}
return $files;
}
/**
* get the content of a file
* @param string $path
* @return string
*/
public function getFile($path) {
return $this->zip->getFromName($path);
}
/**
* extract a single file from the archive
* @param string $path
* @param string $dest
* @return boolean|null
*/
public function extractFile($path, $dest) {
$fp = $this->zip->getStream($path);
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file_put_contents($dest, $fp);
}
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/**
* extract the archive
* @param string $dest
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* @return bool
*/
public function extract($dest) {
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return $this->zip->extractTo($dest);
}
/**
* check if a file or folder exists in the archive
* @param string $path
* @return bool
*/
public function fileExists($path) {
return ($this->zip->locateName($path) !== false) or ($this->zip->locateName($path.'/') !== false);
}
/**
* remove a file or folder from the archive
* @param string $path
* @return bool
*/
public function remove($path) {
if ($this->fileExists($path.'/')) {
return $this->zip->deleteName($path.'/');
} else {
return $this->zip->deleteName($path);
}
}
/**
* get a file handler
* @param string $path
* @param string $mode
* @return resource
*/
public function getStream($path, $mode) {
if ($mode == 'r' or $mode == 'rb') {
return $this->zip->getStream($path);
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} else {
//since we can't directly get a writable stream,
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//make a temp copy of the file and put it back
//in the archive when the stream is closed
if (strrpos($path, '.') !== false) {
$ext = substr($path, strrpos($path, '.'));
} else {
$ext = '';
}
$tmpFile = \OC::$server->getTempManager()->getTemporaryFile($ext);
if ($this->fileExists($path)) {
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$this->extractFile($path, $tmpFile);
}
$handle = fopen($tmpFile, $mode);
return CallbackWrapper::wrap($handle, null, null, function () use ($path, $tmpFile) {
$this->writeBack($tmpFile, $path);
});
}
}
/**
* write back temporary files
*/
public function writeBack($tmpFile, $path) {
$this->addFile($path, $tmpFile);
unlink($tmpFile);
}
/**
* @param string $path
* @return string
*/
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private function stripPath($path) {
if (!$path || $path[0] == '/') {
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return substr($path, 1);
} else {
return $path;
}
}
}