private static byte[] CreateServerHandshake(ServerHandshake handshake)
{
var stringShake = "HTTP/1.1 101 WebSocket Protocol Handshake\r\n" +
"Upgrade: WebSocket\r\n" +
"Connection: Upgrade\r\n" +
"Sec-WebSocket-Origin: " + handshake.Origin + "\r\n" +
"Sec-WebSocket-Location: " + handshake.Location + "\r\n";
if (handshake.SubProtocol != null)
{
stringShake += "Sec-WebSocket-Protocol: " + handshake.SubProtocol + "\r\n";
}
stringShake += "\r\n";
// generate a byte array representation of the handshake including the answer to the challenge
byte[] byteResponse = Encoding.ASCII.GetBytes(stringShake);
int byteResponseLength = byteResponse.Length;
Array.Resize(ref byteResponse, byteResponseLength + handshake.AnswerBytes.Length);
Array.Copy(handshake.AnswerBytes, 0, byteResponse, byteResponseLength, handshake.AnswerBytes.Length);
return byteResponse;
}
public static byte[] GenerateResponseHandshake(ClientHandshake clientHandshake)
{
var responseHandshake = new ServerHandshake();
responseHandshake.Location = "ws://" + clientHandshake.Host + clientHandshake.ResourcePath;
responseHandshake.Origin = clientHandshake.Origin;
responseHandshake.SubProtocol = clientHandshake.SubProtocol;
var challenge = new byte[8];
Array.Copy(clientHandshake.ChallengeBytes.Array, clientHandshake.ChallengeBytes.Offset, challenge, 0, 8);
responseHandshake.AnswerBytes = CalculateAnswerBytes(clientHandshake.Key1, clientHandshake.Key2, clientHandshake.ChallengeBytes);
return CreateServerHandshake(responseHandshake);
}
