mirror of
https://github.com/moodle/moodle.git
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79 lines
2.6 KiB
PHP
79 lines
2.6 KiB
PHP
<?php
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// This file is part of Moodle - http://moodle.org/
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//
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// Moodle is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// Moodle 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 Moodle. If not, see <http://www.gnu.org/licenses/>.
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/**
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* Flowplayer library.
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*
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* @package core
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* @copyright Petr Skoda <petr.skoda@totaralms.com>
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* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
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*/
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defined('MOODLE_INTERNAL') || die();
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/**
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* Safer flash serving code.
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*
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* @param string $filename
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* @return void does not return, ends with die()
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*/
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function flowplayer_send_flash_content($filename) {
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global $CFG;
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// Note: Do not use any fancy APIs here, this must work in all supported versions.
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// No url params.
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if (!empty($_GET) or !empty($_POST)) {
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header("HTTP/1.1 404 Not Found");
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die;
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}
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// Our referrers only, nobody else should embed these scripts.
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if (!empty($_SERVER['HTTP_REFERER'])) {
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$refhost = parse_url($_SERVER['HTTP_REFERER'], PHP_URL_HOST);
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$host = parse_url($CFG->wwwroot . '/', PHP_URL_HOST);
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if ($refhost and $host and strtolower($refhost) !== strtolower($host)) {
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header("HTTP/1.1 404 Not Found");
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die;
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}
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}
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// Fetch and decode the original content.
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$content = file_get_contents($CFG->dirroot . '/lib/flowplayer/' . $filename . '.bin');
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if (!$content) {
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header("HTTP/1.1 404 Not Found");
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die;
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}
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$content = base64_decode($content);
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// No caching allowed.
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if (strpos($CFG->wwwroot, 'https://') === 0) {
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// HTTPS sites - watch out for IE! KB812935 and KB316431.
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header('Cache-Control: private, max-age=10, no-transform');
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header('Expires: '. gmdate('D, d M Y H:i:s', 0) .' GMT');
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header('Pragma: ');
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} else {
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header('Cache-Control: private, must-revalidate, pre-check=0, post-check=0, max-age=0, no-transform');
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header('Expires: '. gmdate('D, d M Y H:i:s', 0) .' GMT');
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header('Pragma: no-cache');
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}
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// Send the original binary code.
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header('Content-Type: application/x-shockwave-flash');
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echo $content;
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die;
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}
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