private string NewHandshakeRequest(string webSocketKey)
{
return "GET /websocket HTTP/1.1\r\n" +
"Host: " + uri.Host + "\r\n" +
"Upgrade: websocket\r\n" +
"Connection: Upgrade\r\n" +
"Sec-WebSocket-Key: " + webSocketKey + "\r\n" +
"Sec-WebSocket-Version: 13\r\n" +
"Content-Length: 0\r\n\r\n";
}