/**
* 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 $defaultParams Parameters to specify on the context
* @return resource Default context
* @throws \RuntimeException if https proxy required and OpenSSL uninstalled
*/
public static function getContext($url, array $defaultOptions = array(), array $defaultParams = array())
{
$options = array('http' => array('follow_location' => 1, 'max_redirects' => 20));
// Handle system proxy
if (!empty($_SERVER['HTTP_PROXY']) || !empty($_SERVER['http_proxy'])) {
// Some systems seem to rely on a lowercased version instead...
$proxy = parse_url(!empty($_SERVER['http_proxy']) ? $_SERVER['http_proxy'] : $_SERVER['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']) && parse_url($url, PHP_URL_HOST)) {
$pattern = new NoProxyPattern($_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 (version_compare(PHP_VERSION, '5.6.0', '<')) {
$options['ssl']['SNI_server_name'] = parse_url($url, PHP_URL_HOST);
}
}
// handle proxy auth if present
if (isset($proxy['user'])) {
$auth = urldecode($proxy['user']);
if (isset($proxy['pass'])) {
$auth .= ':' . urldecode($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']);
}
return stream_context_create($options, $defaultParams);
}
public static function getContext($url, array $defaultOptions = array(), array $defaultParams = array())
{
$options = array('http' => array('follow_location' => 1, 'max_redirects' => 20));
if (!empty($_SERVER['HTTP_PROXY']) || !empty($_SERVER['http_proxy'])) {
$proxy = parse_url(!empty($_SERVER['http_proxy']) ? $_SERVER['http_proxy'] : $_SERVER['HTTP_PROXY']);
}
if (!empty($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";
}
$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'] = $proxyURL;
if (!empty($_SERVER['no_proxy']) && parse_url($url, PHP_URL_HOST)) {
$pattern = new NoProxyPattern($_SERVER['no_proxy']);
if ($pattern->test($url)) {
unset($options['http']['proxy']);
}
}
if (!empty($options['http']['proxy'])) {
switch (parse_url($url, PHP_URL_SCHEME)) {
case 'http':
$reqFullUriEnv = getenv('HTTP_PROXY_REQUEST_FULLURI');
if ($reqFullUriEnv === false || $reqFullUriEnv === '' || strtolower($reqFullUriEnv) !== 'false' && (bool) $reqFullUriEnv) {
$options['http']['request_fulluri'] = true;
}
break;
case 'https':
$reqFullUriEnv = getenv('HTTPS_PROXY_REQUEST_FULLURI');
if ($reqFullUriEnv === false || $reqFullUriEnv === '' || strtolower($reqFullUriEnv) !== 'false' && (bool) $reqFullUriEnv) {
$options['http']['request_fulluri'] = true;
}
break;
}
if (isset($proxy['user'])) {
$auth = urldecode($proxy['user']);
if (isset($proxy['pass'])) {
$auth .= ':' . urldecode($proxy['pass']);
}
$auth = base64_encode($auth);
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']);
}
return stream_context_create($options, $defaultParams);
}
