SimpleSAML\Utils\HTTP::fetch PHP Method

    public static function fetch($url, $context = array(), $getHeaders = false)
    {
        if (!is_string($url)) {
            throw new \InvalidArgumentException('Invalid input parameters.');
        }
        $config = \SimpleSAML_Configuration::getInstance();
        $proxy = $config->getString('proxy', null);
        if ($proxy !== null) {
            if (!isset($context['http']['proxy'])) {
                $context['http']['proxy'] = $proxy;
            }
            $proxy_auth = $config->getString('proxy.auth', false);
            if ($proxy_auth !== false) {
                $context['http']['header'] = "Proxy-Authorization: Basic" . base64_encode($proxy_auth);
            }
            if (!isset($context['http']['request_fulluri'])) {
                $context['http']['request_fulluri'] = true;
            }
            /*
             * If the remote endpoint over HTTPS uses the SNI extension (Server Name Indication RFC 4366), the proxy
             * could introduce a mismatch between the names in the Host: HTTP header and the SNI_server_name in TLS
             * negotiation (thanks to Cristiano Valli @ GARR-IDEM to have pointed this problem).
             * See: https://bugs.php.net/bug.php?id=63519
             * These controls will force the same value for both fields.
             * Marco Ferrante ([email protected]), Nov 2012
             */
            if (preg_match('#^https#i', $url) && defined('OPENSSL_TLSEXT_SERVER_NAME') && OPENSSL_TLSEXT_SERVER_NAME) {
                // extract the hostname
                $hostname = parse_url($url, PHP_URL_HOST);
                if (!empty($hostname)) {
                    $context['ssl'] = array('SNI_server_name' => $hostname, 'SNI_enabled' => true);
                } else {
                    Logger::warning('Invalid URL format or local URL used through a proxy');
                }
            }
        }
        $context = stream_context_create($context);
        $data = file_get_contents($url, false, $context);
        if ($data === false) {
            $error = error_get_last();
            throw new \SimpleSAML_Error_Exception('Error fetching ' . var_export($url, true) . ':' . $error['message']);
        }
        // data and headers
        if ($getHeaders) {
            if (isset($http_response_header)) {
                $headers = array();
                foreach ($http_response_header as $h) {
                    if (preg_match('@^HTTP/1\\.[01]\\s+\\d{3}\\s+@', $h)) {
                        $headers = array();
                        // reset
                        $headers[0] = $h;
                        continue;
                    }
                    $bits = explode(':', $h, 2);
                    if (count($bits) === 2) {
                        $headers[strtolower($bits[0])] = trim($bits[1]);
                    }
                }
            } else {
                // no HTTP headers, probably a different protocol, e.g. file
                $headers = null;
            }
            return array($data, $headers);
        }
        return $data;
    }

 public function finalStep(&$state)
 {
     SimpleSAML_Logger::debug("oauth wrap:  Using this verification code [" . $state['authwindowslive:wrap_verification_code'] . "]");
     // Retrieve Access Token
     // Documentation at: http://msdn.microsoft.com/en-us/library/ff749686.aspx
     $postData = 'wrap_client_id=' . urlencode($this->key) . '&wrap_client_secret=' . urlencode($this->secret) . '&wrap_callback=' . urlencode(SimpleSAML_Module::getModuleUrl('authwindowslive') . '/linkback.php') . '&wrap_verification_code=' . urlencode($state['authwindowslive:wrap_verification_code']);
     $context = array('http' => array('method' => 'POST', 'header' => 'Content-type: application/x-www-form-urlencoded', 'content' => $postData));
     $result = \SimpleSAML\Utils\HTTP::fetch('https://consent.live.com/AccessToken.aspx', $context);
     parse_str($result, $response);
     // error checking of $response to make sure we can proceed
     if (!array_key_exists('wrap_access_token', $response)) {
         throw new Exception('[' . $response['error_code'] . '] ' . $response['wrap_error_reason'] . "\r\nNo wrap_access_token returned - cannot proceed\r\n" . $response['internal_info']);
     }
     SimpleSAML_Logger::debug("Got an access token from the OAuth WRAP service provider [" . $response['wrap_access_token'] . "] for user [" . $response['uid'] . "]");
     // Documentation at: http://msdn.microsoft.com/en-us/library/ff751708.aspx
     $opts = array('http' => array('header' => "Accept: application/json\r\nAuthorization: WRAP access_token=" . $response['wrap_access_token'] . "\r\n"));
     $data = \SimpleSAML\Utils\HTTP::fetch('https://apis.live.net/V4.1/cid-' . $response['uid'] . '/Profiles', $opts);
     $userdata = json_decode($data, TRUE);
     $attributes = array();
     $attributes['windowslive_uid'] = array($response['uid']);
     $attributes['windowslive_targetedID'] = array('http://windowslive.com!' . $response['uid']);
     $attributes['windowslive_user'] = array($response['uid'] . '@windowslive.com');
     if (array_key_exists('Entries', $userdata)) {
         foreach ($userdata['Entries'][0] as $key => $value) {
             if (is_string($value)) {
                 $attributes['windowslive.' . $key] = array((string) $value);
             }
         }
         if (array_key_exists('Emails', $userdata['Entries'][0])) {
             $attributes['windowslive_mail'] = array($userdata['Entries'][0]['Emails'][0]['Address']);
         }
     }
     SimpleSAML_Logger::debug('LiveID Returned Attributes: ' . implode(", ", array_keys($attributes)));
     $state['Attributes'] = $attributes;
 }