/**
* Set the request protocol (https / http).
*
* @param string $protocol
* @throws Exception
* @return Customweb_Core_Http_Request
*/
public function setProtocol($protocol)
{
if ($protocol != 'http' && $protocol != 'https') {
throw new Exception("You can either use HTTP or HTTPS in the URL. Other protocols are not supported.");
}
$this->url->setScheme($protocol);
return $this;
}