nextcloud/lib/private/streamer.php

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<?php
/**
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* @author Joas Schilling <nickvergessen@owncloud.com>
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* @author Thomas Müller <thomas.mueller@tmit.eu>
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* @author Victor Dubiniuk <dubiniuk@owncloud.com>
*
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* @copyright Copyright (c) 2016, ownCloud, Inc.
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* @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;
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use ownCloud\TarStreamer\TarStreamer;
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use ZipStreamer\ZipStreamer;
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class Streamer {
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// array of regexp. Matching user agents will get tar instead of zip
private $preferTarFor = [ '/macintosh|mac os x/i' ];
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// streamer instance
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private $streamerInstance;
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public function __construct(){
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/** @var \OCP\IRequest */
$request = \OC::$server->getRequest();
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if ($request->isUserAgent($this->preferTarFor)) {
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$this->streamerInstance = new TarStreamer();
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} else {
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$this->streamerInstance = new ZipStreamer(['zip64' => PHP_INT_SIZE !== 4]);
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}
}
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/**
* Send HTTP headers
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* @param string $name
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*/
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public function sendHeaders($name){
$extension = $this->streamerInstance instanceof ZipStreamer ? '.zip' : '.tar';
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$fullName = $name . $extension;
// ZipStreamer does not escape name in Content-Disposition atm
if ($this->streamerInstance instanceof ZipStreamer) {
$fullName = rawurlencode($fullName);
}
$this->streamerInstance->sendHeaders($fullName);
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}
/**
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* Stream directory recursively
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* @param string $dir
* @param string $internalDir
*/
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public function addDirRecursive($dir, $internalDir='') {
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$dirname = basename($dir);
$rootDir = $internalDir . $dirname;
if (!empty($rootDir)) {
$this->streamerInstance->addEmptyDir($rootDir);
}
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$internalDir .= $dirname . '/';
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// prevent absolute dirs
$internalDir = ltrim($internalDir, '/');
$files= \OC\Files\Filesystem::getDirectoryContent($dir);
foreach($files as $file) {
$filename = $file['name'];
$file = $dir . '/' . $filename;
if(\OC\Files\Filesystem::is_file($file)) {
$filesize = \OC\Files\Filesystem::filesize($file);
$fh = \OC\Files\Filesystem::fopen($file, 'r');
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$this->addFileFromStream($fh, $internalDir . $filename, $filesize);
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fclose($fh);
}elseif(\OC\Files\Filesystem::is_dir($file)) {
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$this->addDirRecursive($file, $internalDir);
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}
}
}
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/**
* Add a file to the archive at the specified location and file name.
*
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* @param string $stream Stream to read data from
* @param string $internalName Filepath and name to be used in the archive.
* @param int $size Filesize
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* @return bool $success
*/
public function addFileFromStream($stream, $internalName, $size){
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if ($this->streamerInstance instanceof ZipStreamer) {
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return $this->streamerInstance->addFileFromStream($stream, $internalName);
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} else {
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return $this->streamerInstance->addFileFromStream($stream, $internalName, $size);
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}
}
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/**
* Add an empty directory entry to the archive.
*
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* @param string $dirName Directory Path and name to be added to the archive.
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* @return bool $success
*/
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public function addEmptyDir($dirName){
return $this->streamerInstance->addEmptyDir($dirName);
}
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/**
* Close the archive.
* A closed archive can no longer have new files added to it. After
* closing, the file is completely written to the output stream.
* @return bool $success
*/
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public function finalize(){
return $this->streamerInstance->finalize();
}
}