You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
190 lines
6.2 KiB
190 lines
6.2 KiB
<?php
|
|
/**
|
|
* @copyright Copyright (c) 2016, ownCloud, Inc.
|
|
*
|
|
* @author Arthur Schiwon <blizzz@arthur-schiwon.de>
|
|
* @author Christoph Wurst <christoph@winzerhof-wurst.at>
|
|
* @author Daniel Calviño Sánchez <danxuliu@gmail.com>
|
|
* @author Joas Schilling <coding@schilljs.com>
|
|
* @author Roeland Jago Douma <roeland@famdouma.nl>
|
|
* @author Thomas Müller <thomas.mueller@tmit.eu>
|
|
* @author Victor Dubiniuk <dubiniuk@owncloud.com>
|
|
*
|
|
* @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/>
|
|
*
|
|
*/
|
|
|
|
namespace OC;
|
|
|
|
use OC\Files\Filesystem;
|
|
use OCP\Files\File;
|
|
use OCP\Files\Folder;
|
|
use OCP\Files\InvalidPathException;
|
|
use OCP\Files\NotFoundException;
|
|
use OCP\Files\NotPermittedException;
|
|
use OCP\IRequest;
|
|
use ownCloud\TarStreamer\TarStreamer;
|
|
use ZipStreamer\ZipStreamer;
|
|
|
|
class Streamer {
|
|
// array of regexp. Matching user agents will get tar instead of zip
|
|
private $preferTarFor = [ '/macintosh|mac os x/i' ];
|
|
|
|
// streamer instance
|
|
private $streamerInstance;
|
|
|
|
/**
|
|
* Streamer constructor.
|
|
*
|
|
* @param IRequest $request
|
|
* @param int $size The size of the files in bytes
|
|
* @param int $numberOfFiles The number of files (and directories) that will
|
|
* be included in the streamed file
|
|
*/
|
|
public function __construct(IRequest $request, int $size, int $numberOfFiles) {
|
|
|
|
/**
|
|
* zip32 constraints for a basic (without compression, volumes nor
|
|
* encryption) zip file according to the Zip specification:
|
|
* - No file size is larger than 4 bytes (file size < 4294967296); see
|
|
* 4.4.9 uncompressed size
|
|
* - The size of all files plus their local headers is not larger than
|
|
* 4 bytes; see 4.4.16 relative offset of local header and 4.4.24
|
|
* offset of start of central directory with respect to the starting
|
|
* disk number
|
|
* - The total number of entries (files and directories) in the zip file
|
|
* is not larger than 2 bytes (number of entries < 65536); see 4.4.22
|
|
* total number of entries in the central dir
|
|
* - The size of the central directory is not larger than 4 bytes; see
|
|
* 4.4.23 size of the central directory
|
|
*
|
|
* Due to all that, zip32 is used if the size is below 4GB and there are
|
|
* less than 65536 files; the margin between 4*1000^3 and 4*1024^3
|
|
* should give enough room for the extra zip metadata. Technically, it
|
|
* would still be possible to create an invalid zip32 file (for example,
|
|
* a zip file from files smaller than 4GB with a central directory
|
|
* larger than 4GiB), but it should not happen in the real world.
|
|
*
|
|
* We also have to check for a size above 0. As negative sizes could be
|
|
* from not fully scanned external storages. And then things fall apart
|
|
* if somebody tries to package to much.
|
|
*/
|
|
if ($size > 0 && $size < 4 * 1000 * 1000 * 1000 && $numberOfFiles < 65536) {
|
|
$this->streamerInstance = new ZipStreamer(['zip64' => false]);
|
|
} elseif ($request->isUserAgent($this->preferTarFor)) {
|
|
$this->streamerInstance = new TarStreamer();
|
|
} else {
|
|
$this->streamerInstance = new ZipStreamer(['zip64' => PHP_INT_SIZE !== 4]);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Send HTTP headers
|
|
* @param string $name
|
|
*/
|
|
public function sendHeaders($name) {
|
|
$extension = $this->streamerInstance instanceof ZipStreamer ? '.zip' : '.tar';
|
|
$fullName = $name . $extension;
|
|
$this->streamerInstance->sendHeaders($fullName);
|
|
}
|
|
|
|
/**
|
|
* Stream directory recursively
|
|
*
|
|
* @throws NotFoundException
|
|
* @throws NotPermittedException
|
|
* @throws InvalidPathException
|
|
*/
|
|
public function addDirRecursive(string $dir, string $internalDir = ''): void {
|
|
$dirname = basename($dir);
|
|
$rootDir = $internalDir . $dirname;
|
|
if (!empty($rootDir)) {
|
|
$this->streamerInstance->addEmptyDir($rootDir);
|
|
}
|
|
$internalDir .= $dirname . '/';
|
|
// prevent absolute dirs
|
|
$internalDir = ltrim($internalDir, '/');
|
|
|
|
$userFolder = \OC::$server->getRootFolder()->get(Filesystem::getRoot());
|
|
/** @var Folder $dirNode */
|
|
$dirNode = $userFolder->get($dir);
|
|
$files = $dirNode->getDirectoryListing();
|
|
|
|
foreach ($files as $file) {
|
|
if ($file instanceof File) {
|
|
try {
|
|
$fh = $file->fopen('r');
|
|
} catch (NotPermittedException $e) {
|
|
continue;
|
|
}
|
|
$this->addFileFromStream(
|
|
$fh,
|
|
$internalDir . $file->getName(),
|
|
$file->getSize(),
|
|
$file->getMTime()
|
|
);
|
|
fclose($fh);
|
|
} elseif ($file instanceof Folder) {
|
|
if ($file->isReadable()) {
|
|
$this->addDirRecursive($dir . '/' . $file->getName(), $internalDir);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Add a file to the archive at the specified location and file name.
|
|
*
|
|
* @param string $stream Stream to read data from
|
|
* @param string $internalName Filepath and name to be used in the archive.
|
|
* @param int $size Filesize
|
|
* @param int|bool $time File mtime as int, or false
|
|
* @return bool $success
|
|
*/
|
|
public function addFileFromStream($stream, $internalName, $size, $time) {
|
|
$options = [];
|
|
if ($time) {
|
|
$options = [
|
|
'timestamp' => $time
|
|
];
|
|
}
|
|
|
|
if ($this->streamerInstance instanceof ZipStreamer) {
|
|
return $this->streamerInstance->addFileFromStream($stream, $internalName, $options);
|
|
} else {
|
|
return $this->streamerInstance->addFileFromStream($stream, $internalName, $size, $options);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Add an empty directory entry to the archive.
|
|
*
|
|
* @param string $dirName Directory Path and name to be added to the archive.
|
|
* @return bool $success
|
|
*/
|
|
public function addEmptyDir($dirName) {
|
|
return $this->streamerInstance->addEmptyDir($dirName);
|
|
}
|
|
|
|
/**
|
|
* 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
|
|
*/
|
|
public function finalize() {
|
|
return $this->streamerInstance->finalize();
|
|
}
|
|
}
|