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Mini Shell
Mini Shell
<?php
/*
* This file is part of Composer.
*
* (c) Nils Adermann <naderman@naderman.de>
* Jordi Boggiano <j.boggiano@seld.be>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Composer\Util;
use Composer\Composer;
/**
* Allows the creation of a basic context supporting http proxy
*
* @author Jordan Alliot <jordan.alliot@gmail.com>
* @author Markus Tacker <m@coderbyheart.de>
*/
final class StreamContextFactory
{
/**
* Creates a context supporting HTTP proxies
*
* @param string $url URL the context is to be used for
* @param array $defaultOptions Options to merge with the default
* @param array $defaultParams Parameters to specify on the context
* @throws \RuntimeException if https proxy required and OpenSSL uninstalled
* @return resource Default context
*/
public static function getContext($url, array $defaultOptions = array(), array $defaultParams = array())
{
$options = array('http' => array(
// specify defaults again to try and work better with curlwrappers enabled
'follow_location' => 1,
'max_redirects' => 20,
));
// Handle HTTP_PROXY/http_proxy on CLI only for security reasons
if ((PHP_SAPI === 'cli' || PHP_SAPI === 'phpdbg') && (!empty($_SERVER['HTTP_PROXY']) || !empty($_SERVER['http_proxy']))) {
$proxy = parse_url(!empty($_SERVER['http_proxy']) ? $_SERVER['http_proxy'] : $_SERVER['HTTP_PROXY']);
}
// Prefer CGI_HTTP_PROXY if available
if (!empty($_SERVER['CGI_HTTP_PROXY'])) {
$proxy = parse_url($_SERVER['CGI_HTTP_PROXY']);
}
// Override with HTTPS proxy if present and URL is https
if (preg_match('{^https://}i', $url) && (!empty($_SERVER['HTTPS_PROXY']) || !empty($_SERVER['https_proxy']))) {
$proxy = parse_url(!empty($_SERVER['https_proxy']) ? $_SERVER['https_proxy'] : $_SERVER['HTTPS_PROXY']);
}
// Remove proxy if URL matches no_proxy directive
if (!empty($_SERVER['NO_PROXY']) || !empty($_SERVER['no_proxy']) && parse_url($url, PHP_URL_HOST)) {
$pattern = new NoProxyPattern(!empty($_SERVER['no_proxy']) ? $_SERVER['no_proxy'] : $_SERVER['NO_PROXY']);
if ($pattern->test($url)) {
unset($proxy);
}
}
if (!empty($proxy)) {
$proxyURL = isset($proxy['scheme']) ? $proxy['scheme'] . '://' : '';
$proxyURL .= isset($proxy['host']) ? $proxy['host'] : '';
if (isset($proxy['port'])) {
$proxyURL .= ":" . $proxy['port'];
} elseif ('http://' == substr($proxyURL, 0, 7)) {
$proxyURL .= ":80";
} elseif ('https://' == substr($proxyURL, 0, 8)) {
$proxyURL .= ":443";
}
// http(s):// is not supported in proxy
$proxyURL = str_replace(array('http://', 'https://'), array('tcp://', 'ssl://'), $proxyURL);
if (0 === strpos($proxyURL, 'ssl:') && !extension_loaded('openssl')) {
throw new \RuntimeException('You must enable the openssl extension to use a proxy over https');
}
$options['http']['proxy'] = $proxyURL;
// enabled request_fulluri unless it is explicitly disabled
switch (parse_url($url, PHP_URL_SCHEME)) {
case 'http': // default request_fulluri to true
$reqFullUriEnv = getenv('HTTP_PROXY_REQUEST_FULLURI');
if ($reqFullUriEnv === false || $reqFullUriEnv === '' || (strtolower($reqFullUriEnv) !== 'false' && (bool) $reqFullUriEnv)) {
$options['http']['request_fulluri'] = true;
}
break;
case 'https': // default request_fulluri to true
$reqFullUriEnv = getenv('HTTPS_PROXY_REQUEST_FULLURI');
if ($reqFullUriEnv === false || $reqFullUriEnv === '' || (strtolower($reqFullUriEnv) !== 'false' && (bool) $reqFullUriEnv)) {
$options['http']['request_fulluri'] = true;
}
break;
}
// add SNI opts for https URLs
if ('https' === parse_url($url, PHP_URL_SCHEME)) {
$options['ssl']['SNI_enabled'] = true;
if (PHP_VERSION_ID < 50600) {
$options['ssl']['SNI_server_name'] = parse_url($url, PHP_URL_HOST);
}
}
// handle proxy auth if present
if (isset($proxy['user'])) {
$auth = rawurldecode($proxy['user']);
if (isset($proxy['pass'])) {
$auth .= ':' . rawurldecode($proxy['pass']);
}
$auth = base64_encode($auth);
// Preserve headers if already set in default options
if (isset($defaultOptions['http']['header'])) {
if (is_string($defaultOptions['http']['header'])) {
$defaultOptions['http']['header'] = array($defaultOptions['http']['header']);
}
$defaultOptions['http']['header'][] = "Proxy-Authorization: Basic {$auth}";
} else {
$options['http']['header'] = array("Proxy-Authorization: Basic {$auth}");
}
}
}
$options = array_replace_recursive($options, $defaultOptions);
if (isset($options['http']['header'])) {
$options['http']['header'] = self::fixHttpHeaderField($options['http']['header']);
}
if (defined('HHVM_VERSION')) {
$phpVersion = 'HHVM ' . HHVM_VERSION;
} else {
$phpVersion = 'PHP ' . PHP_MAJOR_VERSION . '.' . PHP_MINOR_VERSION . '.' . PHP_RELEASE_VERSION;
}
if (!isset($options['http']['header']) || false === stripos(implode('', $options['http']['header']), 'user-agent')) {
$options['http']['header'][] = sprintf(
'User-Agent: Composer/%s (%s; %s; %s%s)',
Composer::getVersion(),
function_exists('php_uname') ? php_uname('s') : 'Unknown',
function_exists('php_uname') ? php_uname('r') : 'Unknown',
$phpVersion,
getenv('CI') ? '; CI' : ''
);
}
return stream_context_create($options, $defaultParams);
}
/**
* A bug in PHP prevents the headers from correctly being sent when a content-type header is present and
* NOT at the end of the array
*
* This method fixes the array by moving the content-type header to the end
*
* @link https://bugs.php.net/bug.php?id=61548
* @param string|array $header
* @return array
*/
private static function fixHttpHeaderField($header)
{
if (!is_array($header)) {
$header = explode("\r\n", $header);
}
uasort($header, function ($el) {
return stripos($el, 'content-type') === 0 ? 1 : -1;
});
return $header;
}
}
Zerion Mini Shell 1.0