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