/// <summary>
/// Sends a WebSocket frame to the client.
/// </summary>
/// <param name="dt">The data to be sent.</param>
/// <param name="msgType">The type of message sent.</param>
/// <returns>Completed Task</returns>
public virtual async Task SendAsync(ArraySegment <byte> dt, WSOpcodeType msgType)
{
if (!handShaked)
{
return;
}
if (disposed)
{
return;
}
if (closed)
{
return;
}
var data = dt.Array.SubArray(dt.Offset, dt.Count);
//if (data.Array == null)
//throw new ArgumentNullException($"Inner array of argument \"{nameof(data)}\" cannot be equal to null.");
byte[] d = WSArrayHelpers.ToFrameData(data, msgType);
if (secure)
{
await secureStream.WriteAsync(d, 0, d.Length);
}
else
{
await client.GetStream().WriteAsync(d, 0, d.Length);
}
if (msgType == WSOpcodeType.Close && !disposed)
{
await DisposeAsync();
}
}
private Task OnReceive(WebSocketInstance arg1, byte[] arg2, WSOpcodeType arg3)
{
if (arg3 == WSOpcodeType.Text)
{
Console.WriteLine(Encoding.UTF8.GetString(arg2));
}
return(Task.CompletedTask);
}
/// <summary>
/// Converts data into a WebSocket frame.
/// </summary>
/// <param name="data">The input data to be converted.</param>
/// <param name="msgType">The Opcode type of the data.</param>
/// <returns>A valid WebSocket frame built from the data and Opcode type.</returns>
public static byte[] ToFrameData(ArraySegment <byte> data, WSOpcodeType msgType)
{
byte[] response;
byte[] bytesRaw = data.Array;
byte[] frame = new byte[10];
int indexStartRawData = -1;
int length = bytesRaw.Length;
frame[0] = (byte)(128 + (int)msgType);
if (length <= 125)
{
frame[1] = (byte)length;
indexStartRawData = 2;
}
else if (length >= 126 && length <= 65535)
{
frame[1] = (byte)126;
frame[2] = (byte)((length >> 8) & 255);
frame[3] = (byte)(length & 255);
indexStartRawData = 4;
}
else
{
frame[1] = (byte)127;
frame[2] = (byte)((length >> 56) & 255);
frame[3] = (byte)((length >> 48) & 255);
frame[4] = (byte)((length >> 40) & 255);
frame[5] = (byte)((length >> 32) & 255);
frame[6] = (byte)((length >> 24) & 255);
frame[7] = (byte)((length >> 16) & 255);
frame[8] = (byte)((length >> 8) & 255);
frame[9] = (byte)(length & 255);
indexStartRawData = 10;
}
response = new byte[indexStartRawData + length];
int i, reponseIdx = 0;
//Add the frame bytes to the reponse
for (i = 0; i < indexStartRawData; i++)
{
response[reponseIdx] = frame[i];
reponseIdx++;
}
//Add the data bytes to the response
for (i = 0; i < length; i++)
{
response[reponseIdx] = bytesRaw[i];
reponseIdx++;
}
return(response);
}
