Auth_Yadis_ParanoidHTTPFetcher::get PHP Method

    function get($url, $extra_headers = null)
    {
        if (!$this->canFetchURL($url)) {
            return null;
        }
        $stop = time() + $this->timeout;
        $off = $this->timeout;
        $redir = true;
        while ($redir && $off > 0) {
            $this->reset();
            $c = curl_init();
            if (defined('Auth_OpenID_DISABLE_SSL_VERIFYPEER') && Auth_OpenID_DISABLE_SSL_VERIFYPEER === true) {
                trigger_error('You have disabled SSL verifcation, this is a TERRIBLE ' . 'idea in almost all cases. Set Auth_OpenID_DISABLE_SSL_' . 'VERIFYPEER to false if you want to be safe again', E_USER_WARNING);
                curl_setopt($c, CURLOPT_SSL_VERIFYPEER, false);
            }
            if ($c === false) {
                Auth_OpenID::log("curl_init returned false; could not " . "initialize for URL '%s'", $url);
                return null;
            }
            if (defined('CURLOPT_NOSIGNAL')) {
                curl_setopt($c, CURLOPT_NOSIGNAL, true);
            }
            if (!$this->allowedURL($url)) {
                Auth_OpenID::log("Fetching URL not allowed: %s", $url);
                return null;
            }
            curl_setopt($c, CURLOPT_WRITEFUNCTION, array($this, "_writeData"));
            curl_setopt($c, CURLOPT_HEADERFUNCTION, array($this, "_writeHeader"));
            if ($extra_headers) {
                curl_setopt($c, CURLOPT_HTTPHEADER, $extra_headers);
            }
            $cv = curl_version();
            if (is_array($cv)) {
                $curl_user_agent = 'curl/' . $cv['version'];
            } else {
                $curl_user_agent = $cv;
            }
            curl_setopt($c, CURLOPT_USERAGENT, Auth_OpenID_USER_AGENT . ' ' . $curl_user_agent);
            curl_setopt($c, CURLOPT_TIMEOUT, $off);
            curl_setopt($c, CURLOPT_URL, $url);
            if (defined('Auth_OpenID_VERIFY_HOST')) {
                // set SSL verification options only if Auth_OpenID_VERIFY_HOST
                // is explicitly set, otherwise use system default.
                if (Auth_OpenID_VERIFY_HOST) {
                    curl_setopt($c, CURLOPT_SSL_VERIFYPEER, true);
                    curl_setopt($c, CURLOPT_SSL_VERIFYHOST, 2);
                    if (defined('Auth_OpenID_CAINFO')) {
                        curl_setopt($c, CURLOPT_CAINFO, Auth_OpenID_CAINFO);
                    }
                } else {
                    curl_setopt($c, CURLOPT_SSL_VERIFYPEER, false);
                }
            }
            if (defined('Auth_OpenID_HTTP_PROXY')) {
                curl_setopt($c, CURLOPT_PROXY, Auth_OpenID_HTTP_PROXY);
            }
            curl_exec($c);
            $code = curl_getinfo($c, CURLINFO_HTTP_CODE);
            $body = $this->data;
            $headers = $this->headers;
            if (!$code) {
                Auth_OpenID::log("Got no response code when fetching %s", $url);
                Auth_OpenID::log("CURL error (%s): %s", curl_errno($c), curl_error($c));
                return null;
            }
            if (in_array($code, array(301, 302, 303, 307))) {
                $url = $this->_findRedirect($headers, $url);
                $redir = true;
            } else {
                $redir = false;
                curl_close($c);
                if (defined('Auth_OpenID_VERIFY_HOST') && Auth_OpenID_VERIFY_HOST == true && $this->isHTTPS($url)) {
                    Auth_OpenID::log('OpenID: Verified SSL host %s using ' . 'curl/get', $url);
                }
                $new_headers = array();
                foreach ($headers as $header) {
                    if (strpos($header, ': ')) {
                        list($name, $value) = explode(': ', $header, 2);
                        $new_headers[$name] = $value;
                    }
                }
                return new Auth_Yadis_HTTPResponse($url, $code, $new_headers, $body);
            }
            $off = $stop - time();
        }
        return null;
    }