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<?php
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/*
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* This file is part of Composer.
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*
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* (c) Nils Adermann <naderman@naderman.de>
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* Jordi Boggiano <j.boggiano@seld.be>
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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namespace Composer\Util;
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/**
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* Allows the creation of a basic context supporting http proxy
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*
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* @author Jordan Alliot <jordan.alliot@gmail.com>
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*/
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final class StreamContextFactory
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{
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/**
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* Creates a context supporting HTTP proxies
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*
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* @param array $defaultOptions Options to merge with the default
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* @param array $defaultParams Parameters to specify on the context
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* @return resource Default context
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* @throws \RuntimeException if https proxy required and OpenSSL uninstalled
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*/
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static public function getContext(array $defaultOptions = array(), array $defaultParams = array())
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{
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$options = array('http' => array());
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// Handle system proxy
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if (isset($_SERVER['HTTP_PROXY']) || isset($_SERVER['http_proxy'])) {
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// Some systems seem to rely on a lowercased version instead...
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$proxy = isset($_SERVER['http_proxy']) ? $_SERVER['http_proxy'] : $_SERVER['HTTP_PROXY'];
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$proxyURL = parse_url($proxy, PHP_URL_SCHEME) . "://";
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$proxyURL .= parse_url($proxy, PHP_URL_HOST);
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$proxyPort = parse_url($proxy, PHP_URL_PORT);
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if (isset($proxyPort)) {
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$proxyURL .= ":" . $proxyPort;
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} else {
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if ('http://' == substr($proxyURL, 0, 7)) {
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$proxyURL .= ":80";
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} else if ('https://' == substr($proxyURL, 0, 8)) {
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$proxyURL .= ":443";
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}
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}
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// http(s):// is not supported in proxy
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$proxyURL = str_replace(array('http://', 'https://'), array('tcp://', 'ssl://'), $proxyURL);
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if (0 === strpos($proxyURL, 'ssl:') && !extension_loaded('openssl')) {
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throw new \RuntimeException('You must enable the openssl extension to use a proxy over https');
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}
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$options['http'] = array(
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'proxy' => $proxyURL,
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'request_fulluri' => true,
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);
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// Extract authentication credentials from the proxy url
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$user = parse_url($proxy, PHP_URL_USER);
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$pass = parse_url($proxy, PHP_URL_PASS);
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if (isset($user)) {
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$auth = $user;
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if (isset($pass)) {
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$auth .= ":{$pass}";
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}
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$auth = base64_encode($auth);
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// Preserve headers if already set in default options
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if (isset($defaultOptions['http']) && isset($defaultOptions['http']['header'])) {
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$defaultOptions['http']['header'] .= "Proxy-Authorization: Basic {$auth}\r\n";
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} else {
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$options['http']['header'] = "Proxy-Authorization: Basic {$auth}\r\n";
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}
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}
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}
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$options = array_merge_recursive($options, $defaultOptions);
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return stream_context_create($options, $defaultParams);
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}
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}
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