80 lines
2.5 KiB
PHP
80 lines
2.5 KiB
PHP
<?php
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/**
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; under version 2
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* of the License (non-upgradable).
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* Copyright (c) 2013 (original work) Open Assessment Technologies SA (under the project TAO-PRODUCT);
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*
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*/
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namespace oat\tao\model\websource;
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use common_ext_ExtensionsManager;
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/**
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* Grants Access to compiled data via the getFile entry point
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*
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* @access public
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* @author Joel Bout, <joel@taotesting.com>
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* @package tao
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* @license GPLv2 http://www.opensource.org/licenses/gpl-2.0.php
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*/
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class TokenWebSource extends BaseWebsource
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{
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const OPTION_SECRET = 'secret';
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const OPTION_PATH = 'path';
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const OPTION_TTL = 'ttl';
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public static function spawnWebsource($fileSystemId, $path)
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{
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$provider = self::spawn($fileSystemId, [
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self::OPTION_SECRET => md5(rand() . $path),
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self::OPTION_PATH => $path,
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self::OPTION_TTL => (int) ini_get('session.gc_maxlifetime')
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]);
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return $provider;
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}
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public function getAccessUrl($relativePath)
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{
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$path = [];
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foreach (preg_split('/[\/\\\]/', ltrim($relativePath, '/\\')) as $ele) {
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$path[] = rawurlencode($ele);
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}
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$relUrl = implode('/', $path);
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$relPath = rtrim(str_replace(DIRECTORY_SEPARATOR, '/', $relativePath));
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$token = $this->generateToken($relUrl);
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$taoExtension = common_ext_ExtensionsManager::singleton()->getExtensionById('tao');
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return $taoExtension->getConstant('BASE_URL') . 'getFile.php/' . $this->getId() . '/' . $token . '/' . $relUrl . '*/';
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}
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// helpers
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/**
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* Generate a token for the resource
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* Same algorithm is implemented again in getFile.php
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*
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* @param string $relPath
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* @return string
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*/
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protected function generateToken($relPath)
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{
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$time = time();
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return $time . '/' . md5($time . $relPath . $this->getOption(self::OPTION_SECRET));
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}
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}
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