public function sendHandshakeResponse()
{
// Last 8 bytes of the client's handshake are used for key calculation later
$l8b = substr($this->_clientHandshake, -8);
// Check for 2-key based handshake (Hixie protocol draft)
$key1 = isset($this->_headers['Sec-Websocket-Key1']) ? $this->_headers['Sec-Websocket-Key1'] : null;
$key2 = isset($this->_headers['Sec-Websocket-Key2']) ? $this->_headers['Sec-Websocket-Key2'] : null;
// Origin checking (TODO)
$origin = isset($this->_headers['Origin']) ? $this->_headers['Origin'] : null;
$host = $this->_headers['Host'];
$location = $this->_headers['GET'];
// Build response
$response = "HTTP/1.1 101 WebSocket Protocol Handshake\r\n" . "Upgrade: WebSocket\r\n" . "Connection: Upgrade\r\n";
// Build HIXIE response
$response .= "Sec-WebSocket-Origin: {$origin}\r\n" . "Sec-WebSocket-Location: ws://{$host}{$location}\r\n";
$response .= "\r\n" . WebSocketFunctions::calcHixieResponse($key1, $key2, $l8b);
$this->_socket->write($response);
echo "HIXIE Response SENT!";
}
