95 lines
3.0 KiB
PHP
95 lines
3.0 KiB
PHP
<?php
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/**
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* Proxy script to load a file from other domain
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*
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* PHP versions 4 and 5
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*
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* Copyright (c) 2010-2013 Shinya Muramatsu
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*
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* @author Shinya Muramatsu <revulon@gmail.com>
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* @copyright 2010-2013 Shinya Muramatsu
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* @license http://www.opensource.org/licenses/mit-license.php MIT License
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* @link http://flashcanvas.net/
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* @link http://code.google.com/p/flashcanvas/
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*/
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function getHostName() {
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if (isset($_SERVER['HTTP_X_FORWARDED_HOST'])) {
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return $_SERVER['HTTP_X_FORWARDED_HOST'];
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} else if (isset($_SERVER['HTTP_HOST'])) {
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return $_SERVER['HTTP_HOST'];
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} else {
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return $_SERVER['SERVER_NAME'];
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}
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}
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// Whether we check referrer or not
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define('CHECK_REFERRER', true);
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// If necessary, specify the host where the SWF file is located
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define('SWF_HOST_NAME', '');
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// Check that the request comes from the same host
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if (CHECK_REFERRER) {
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if (empty($_SERVER['HTTP_REFERER'])) {
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exit;
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}
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if (SWF_HOST_NAME) {
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$host = SWF_HOST_NAME;
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} else {
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$host = getHostName();
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}
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$pattern = '#^https?://' . str_replace('.', '\.', $host) . '(:\d*)?/#';
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if (!preg_match($pattern, $_SERVER['HTTP_REFERER'])) {
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exit;
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}
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}
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// Check that the request has a valid URL parameter
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if (empty($_GET['url'])) {
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exit;
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}
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if (!preg_match('#^https?://#', $_GET['url'])) {
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exit;
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}
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// Percent-encode special characters in the URL
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$search = array( '%', '#', ' ');
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$replace = array('%25', '%23', '%20');
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$url = str_replace($search, $replace, $_GET['url']);
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// Disable compression
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header('Content-Encoding: none');
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// Load and output the file
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if (extension_loaded('curl')) {
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// Use cURL extension
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$ch = curl_init($url);
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// curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
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// curl_setopt($ch, CURLOPT_MAXREDIRS, 10);
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curl_exec($ch);
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curl_close($ch);
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} else {
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// Use the http:// wrapper
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readfile($url);
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}
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