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<?php
/**
* @copyright Copyright (c) 2016, ownCloud, Inc.
*
* @author Felix Moeller <mail@felixmoeller.de>
* @author Morris Jobke <hey@morrisjobke.de>
* @author Robin Appelman <robin@icewind.nl>
* @author scambra <sergio@entrecables.com>
* @author Thomas Müller <thomas.mueller@tmit.eu>
* @author Vincent Petry <pvince81@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 OCA\DAV\Connector\Sabre;
/**
* This plugin check user quota and deny creating files when they exceeds the quota.
*
* @author Sergio Cambra
* @copyright Copyright (C) 2012 entreCables S.L. All rights reserved.
* @license http://code.google.com/p/sabredav/wiki/License Modified BSD License
*/
class QuotaPlugin extends \Sabre\DAV\ServerPlugin {
/**
* @var \OC\Files\View
*/
private $view;
/**
* Reference to main server object
*
* @var \Sabre\DAV\Server
*/
private $server;
/**
* @param \OC\Files\View $view
*/
public function __construct($view) {
$this->view = $view;
}
/**
* This initializes the plugin.
*
* This function is called by \Sabre\DAV\Server, after
* addPlugin is called.
*
* This method should set up the requires event subscriptions.
*
* @param \Sabre\DAV\Server $server
* @return void
*/
public function initialize(\Sabre\DAV\Server $server) {
$this->server = $server;
$server->on('beforeWriteContent', array($this, 'checkQuota'), 10);
$server->on('beforeCreateFile', array($this, 'checkQuota'), 10);
}
/**
* This method is called before any HTTP method and validates there is enough free space to store the file
*
* @param string $uri
* @param null $data
* @throws \Sabre\DAV\Exception\InsufficientStorage
* @return bool
*/
public function checkQuota($uri, $data = null) {
$length = $this->getLength();
if ($length) {
if (substr($uri, 0, 1) !== '/') {
$uri = '/' . $uri;
}
list($parentUri, $newName) = \Sabre\HTTP\URLUtil::splitPath($uri);
if(is_null($parentUri)) {
$parentUri = '';
}
$req = $this->server->httpRequest;
if ($req->getHeader('OC-Chunked')) {
$info = \OC_FileChunking::decodeName($newName);
$chunkHandler = $this->getFileChunking($info);
// subtract the already uploaded size to see whether
// there is still enough space for the remaining chunks
$length -= $chunkHandler->getCurrentSize();
// use target file name for free space check in case of shared files
$uri = rtrim($parentUri, '/') . '/' . $info['name'];
}
$freeSpace = $this->getFreeSpace($uri);
if ($freeSpace !== \OCP\Files\FileInfo::SPACE_UNKNOWN && $length > $freeSpace) {
if (isset($chunkHandler)) {
$chunkHandler->cleanup();
}
throw new \Sabre\DAV\Exception\InsufficientStorage();
}
}
return true;
}
public function getFileChunking($info) {
// FIXME: need a factory for better mocking support
return new \OC_FileChunking($info);
}
public function getLength() {
$req = $this->server->httpRequest;
$length = $req->getHeader('X-Expected-Entity-Length');
if (!$length) {
$length = $req->getHeader('Content-Length');
}
$ocLength = $req->getHeader('OC-Total-Length');
if ($length && $ocLength) {
return max($length, $ocLength);
}
return $length;
}
/**
* @param string $uri
* @return mixed
*/
public function getFreeSpace($uri) {
try {
$freeSpace = $this->view->free_space(ltrim($uri, '/'));
return $freeSpace;
} catch (\OCP\Files\StorageNotAvailableException $e) {
throw new \Sabre\DAV\Exception\ServiceUnavailable($e->getMessage());
}
}
}
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