/**
* Establishes a tunnel to a secure remote server via HTTP CONNECT request
*
* This method will fail if 'ssl_verify_peer' is enabled. Probably because PHP
* sees that we are connected to a proxy server (duh!) rather than the server
* that presents its certificate.
*
* @link http://tools.ietf.org/html/rfc2817#section-5.2
* @throws HTTP_Request2_Exception
*/
protected function establishTunnel()
{
$donor = new self();
$connect = new HTTP_Request2($this->request->getUrl(), HTTP_Request2::METHOD_CONNECT, array_merge($this->request->getConfig(), array('adapter' => $donor)));
$response = $connect->send();
// Need any successful (2XX) response
if (200 > $response->getStatus() || 300 <= $response->getStatus()) {
throw new HTTP_Request2_ConnectionException('Failed to connect via HTTPS proxy. Proxy response: ' . $response->getStatus() . ' ' . $response->getReasonPhrase());
}
$this->socket = $donor->socket;
$this->socket->enableCrypto();
}
