Subversion Repositories oidplus

<?php

/*

 * OIDplus 2.0

 * Copyright 2019 Daniel Marschall, ViaThinkSoft

 *

 * Licensed under the Apache License, Version 2.0 (the "License");

 * you may not use this file except in compliance with the License.

 * You may obtain a copy of the License at

 *

 *     http://www.apache.org/licenses/LICENSE-2.0

 *

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS,

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 * See the License for the specific language governing permissions and

 * limitations under the License.

 */

// We do this stuff to avoid that the client includes an externa JavaScript from polyfill.io,

// since some users might have a problem with that (in regards privacy of their IP address etc.)

// So, the OIDplus webserver will act as proxy.

if (!isset($_SERVER['HTTP_USER_AGENT'])) die();

$ua = $_SERVER['HTTP_USER_AGENT'];

$opts = [

    "http" => [

        "method" => "GET",

        "header" => "User-Agent: ".$ua."\r\n"

    ]

];

$context = stream_context_create($opts);

$out = file_get_contents('https://polyfill.io/v3/polyfill.min.js?features=fetch%2CURL', false, $context);

# ---

$etag = md5($out);

header("Etag: $etag");

header('Content-MD5: '.$etag); // RFC 2616 clause 14.15

if (isset($_SERVER['HTTP_IF_NONE_MATCH']) && (trim($_SERVER['HTTP_IF_NONE_MATCH']) == $etag)) {

        header("HTTP/1.1 304 Not Modified");

} else {

        header('Content-Type:application/javascript');

        echo $out;

}