private async Task <WatsonMessage> MessageReadAsync(ClientMetadata client)
{
/*
*
* Do not catch exceptions, let them get caught by the data reader
* to destroy the connection
*
*/
WatsonMessage msg = null;
if (_Mode == Mode.Ssl)
{
msg = new WatsonMessage(client.SslStream, Debug);
if (ReadDataStream)
{
await msg.Build();
}
else
{
await msg.BuildStream();
}
}
else if (_Mode == Mode.Tcp)
{
msg = new WatsonMessage(client.NetworkStream, Debug);
if (ReadDataStream)
{
await msg.Build();
}
else
{
await msg.BuildStream();
}
}
else
{
throw new ArgumentException("Unknown mode: " + _Mode.ToString());
}
return(msg);
}
private async Task DataReceiver(CancellationToken?cancelToken = null)
{
try
{
#region Wait-for-Data
while (true)
{
cancelToken?.ThrowIfCancellationRequested();
#region Check-Connection
if (_Client == null)
{
Log("*** DataReceiver null TCP interface detected, disconnection or close assumed");
break;
}
if (!_Client.Connected)
{
Log("*** DataReceiver server disconnected");
break;
}
if (_Ssl != null && !_Ssl.CanRead)
{
Log("*** DataReceiver cannot read from SSL stream");
break;
}
#endregion
#region Read-Message-and-Handle
WatsonMessage msg = null;
if (_Ssl != null)
{
msg = new WatsonMessage(_Ssl, Debug);
if (ReadDataStream)
{
await msg.Build();
}
else
{
await msg.BuildStream();
}
}
else
{
msg = new WatsonMessage(_Client.GetStream(), Debug);
if (ReadDataStream)
{
await msg.Build();
}
else
{
await msg.BuildStream();
}
}
if (msg == null)
{
await Task.Delay(30);
continue;
}
if (msg.Status == MessageStatus.AuthSuccess)
{
Log("DataReceiver successfully authenticated");
AuthenticationSucceeded?.Invoke();
continue;
}
else if (msg.Status == MessageStatus.AuthFailure)
{
Log("DataReceiver authentication failed, please authenticate using pre-shared key");
AuthenticationFailure?.Invoke();
continue;
}
if (msg.Status == MessageStatus.AuthRequired)
{
Log("DataReceiver authentication required, please authenticate using pre-shared key");
if (AuthenticationRequested != null)
{
string psk = AuthenticationRequested();
if (!String.IsNullOrEmpty(psk))
{
Authenticate(psk);
}
}
continue;
}
if (ReadDataStream)
{
if (MessageReceived != null)
{
Task <bool> unawaited = Task.Run(() => MessageReceived(msg.Data));
}
}
else
{
StreamReceived?.Invoke(msg.ContentLength, msg.DataStream);
}
#endregion
}
#endregion
}
catch (OperationCanceledException)
{
}
catch (ObjectDisposedException)
{
}
catch (Exception e)
{
if (Debug)
{
Log("*** DataReceiver server disconnected");
Log(Common.SerializeJson(e));
}
}
finally
{
Connected = false;
ServerDisconnected?.Invoke();
}
}