public static IHandler Create(WebsocketHttpRequest request)
{
return(new ComposableHandler
{
Handshake = sub => Handshake(request, sub),
});
}
public static byte[] Handshake(WebsocketHttpRequest request, string subProtocol)
{
Console.WriteLine("Building Draft76 Response");
var builder = new StringBuilder();
builder.Append("HTTP/1.1 101 WebSocket Protocol Handshake\r\n");
builder.Append("Upgrade: WebSocket\r\n");
builder.Append("Connection: Upgrade\r\n");
builder.AppendFormat("Sec-WebSocket-Origin: {0}\r\n", request["Origin"]);
builder.AppendFormat("Sec-WebSocket-Location: {0}://{1}{2}\r\n", request.Scheme, request["Host"], request.Path);
if (subProtocol != null)
{
builder.AppendFormat("Sec-WebSocket-Protocol: {0}\r\n", subProtocol);
}
builder.Append("\r\n");
var key1 = request["Sec-WebSocket-Key1"];
var key2 = request["Sec-WebSocket-Key2"];
var challenge = new ArraySegment <byte>(request.Bytes, request.Bytes.Length - 8, 8);
var answerBytes = CalculateAnswerBytes(key1, key2, challenge);
var byteResponse = Encoding.ASCII.GetBytes(builder.ToString());
var byteResponseLength = byteResponse.Length;
Array.Resize(ref byteResponse, byteResponseLength + answerBytes.Length);
Array.Copy(answerBytes, 0, byteResponse, byteResponseLength, answerBytes.Length);
return(byteResponse);
}
public static IHandler Create(WebsocketHttpRequest request, Action <string> onMessage)
{
return(new ComposableHandler
{
TextFrame = FrameText,
Handshake = sub => Handshake(request, sub),
ReceiveData = data => ReceiveData(onMessage, data)
});
}
public static IHandler Create(WebsocketHttpRequest request, Action <string> onMessage, Action onClose, Action <byte[]> onBinary, Action <byte[]> onPing, Action <byte[]> onPong)
{
var readState = new ReadState();
return(new ComposableHandler
{
Handshake = sub => BuildHandshake(request, sub),
TextFrame = s => FrameData(Encoding.UTF8.GetBytes(s), FrameType.Text),
BinaryFrame = s => FrameData(s, FrameType.Binary),
PingFrame = s => FrameData(s, FrameType.Ping),
PongFrame = s => FrameData(s, FrameType.Pong),
CloseFrame = i => FrameData(i.ToBigEndianBytes <ushort>(), FrameType.Close),
ReceiveData = d => ReceiveData(d, readState, (op, data) => ProcessFrame(op, data, onMessage, onClose, onBinary, onPing, onPong))
});
}
public static byte[] BuildHandshake(WebsocketHttpRequest request, string subProtocol)
{
Console.WriteLine("Building Hybi-14 Response");
var builder = new StringBuilder();
builder.Append("HTTP/1.1 101 Switching Protocols\r\n");
builder.Append("Upgrade: websocket\r\n");
builder.Append("Connection: Upgrade\r\n");
if (subProtocol != null)
{
builder.AppendFormat("Sec-WebSocket-Protocol: {0}\r\n", subProtocol);
}
var responseKey = CreateResponseKey(request["Sec-WebSocket-Key"]);
builder.AppendFormat("Sec-WebSocket-Accept: {0}\r\n", responseKey);
builder.Append("\r\n");
return(Encoding.ASCII.GetBytes(builder.ToString()));
}
public static byte[] Handshake(WebsocketHttpRequest request, string subProtocol)
{
// Console.WriteLine("Building Flash Socket Policy Response");
return(Encoding.UTF8.GetBytes(PolicyResponse));
}