public Task CloseAsync(WebSocketCloseStatus webSocketCloseStatus = WebSocketCloseStatus.NormalClosure, string reason = "Passive Closure")
{
SpeechWebSocketLogger.Log("### SpeechWebSocket.STATUS: {0} ###", ClientWebSocket.State);
switch (ClientWebSocket.State)
{
case WebSocketState.Closed:
case WebSocketState.None:
ReceiveTokenSource?.Cancel();
return(Task.CompletedTask);
case WebSocketState.Aborted:
case WebSocketState.CloseReceived:
SendingTokenSource?.Cancel();
return(Task.CompletedTask);
case WebSocketState.CloseSent:
SendingTokenSource?.Cancel();
return(ClientWebSocket.CloseAsync(webSocketCloseStatus, reason, CancellationToken.None));
case WebSocketState.Connecting:
ReceiveTokenSource?.Cancel();
ClientWebSocket.Abort();
return(Task.CompletedTask);
case WebSocketState.Open:
default:
SendingTokenSource?.Cancel();
return(ClientWebSocket.CloseOutputAsync(webSocketCloseStatus, reason, CancellationToken.None));
}
}
protected async Task OnReceiving()
{
while (true)
{
var bufferBytes = new byte[ReceiveChunkSize];
var bufferSegment = new ArraySegment <byte>(bufferBytes);
WebSocketReceiveResult result = null;
ReceiveTokenSource.Token.ThrowIfCancellationRequested();
do
{
ReceiveTokenSource.Token.ThrowIfCancellationRequested();
if (ClientWebSocket.State == WebSocketState.Open || ClientWebSocket.State == WebSocketState.CloseSent)
{
result = await ClientWebSocket.ReceiveAsync(bufferSegment, CancellationToken.None);
string text = string.Empty;
var buffer = bufferBytes.Skip(bufferSegment.Offset).Take(result.Count).ToArray();
switch (result.MessageType)
{
case WebSocketMessageType.Close:
var status = result.CloseStatus ?? ClientWebSocket.CloseStatus ?? WebSocketCloseStatus.Empty;
var description = result.CloseStatusDescription;
SpeechWebSocketLogger.Log("### SpeechWebSocket.CLOSING: {0} -> {1} ###", status, description);
await CloseAsync(status, description);
SpeechWebSocketLogger.Log("### SpeechWebSocket.CLOSED ###");
OnClose(new SpeechWebSocketEventCloseArgs((int)status, description));
return;
case WebSocketMessageType.Binary:
// text = Encoding.UTF8.GetString(buffer, 0, buffer.Length);
OnMessage(new SpeechWebSocketEventMessageArgs(buffer, text, SpeechWebSocketDataType.Binary));
break;
case WebSocketMessageType.Text:
SpeechWebSocketLogger.Log("### SpeechWebSocket.TEXT ###");
text = Encoding.UTF8.GetString(buffer, 0, buffer.Length);
OnMessage(new SpeechWebSocketEventMessageArgs(buffer, text, SpeechWebSocketDataType.Text));
break;
}
}
//else
//{
// OnClose(new SpeechWebSocketEventCloseArgs(1000));
// return;
//}
} while (result.EndOfMessage == false);
}
}
public void Connect()
{
InitializeCancellationTokenSource();
Task.Factory.StartNew(() =>
{
try
{
var dateTime = DateTime.Now;
SpeechWebSocketLogger.Log("### SpeechWebSocket.CONNECT[{0}]: {1} ###", ClientWebSocket.State, UriBuilder.Uri);
if (ClientWebSocket.State == WebSocketState.None || ClientWebSocket.State == WebSocketState.Closed)
{
ClientWebSocket = new ClientWebSocket();
foreach (var item in RequestHeaders)
{
ClientWebSocket.Options.SetRequestHeader(item.Key, item.Value);
}
SendingTokenSource.Token.ThrowIfCancellationRequested();
var task = ClientWebSocket.ConnectAsync(UriBuilder.Uri, CancellationToken.None);
task.Wait();
SpeechWebSocketLogger.Log("### SpeechWebSocket.CONNECT: {0}ms ###", (DateTime.Now - dateTime).Milliseconds);
switch (task.Status)
{
case TaskStatus.RanToCompletion:
var receive = OnReceiving();
OnOpen(new SpeechWebSocketEventOpenArgs());
try
{
receive.Wait();
}
catch (AggregateException ex)
{
SpeechWebSocketLogger.Log("### SpeechWebSocket.RECEIVING EXCEPTIONS: {0} ###", ex.Message);
foreach (var v in ex.InnerExceptions)
{
SpeechWebSocketLogger.Log("### SpeechWebSocket.RECEIVING MESSAGE: {0} ###", v.Message);
}
}
catch (ObjectDisposedException ex)
{
SpeechWebSocketLogger.Log("### SpeechWebSocket.RECEIVING EXCEPTION: {0} ###", ex.Message);
}
break;
default:
OnError(new SpeechWebSocketEventErrorArgs(task.Exception));
break;
}
return;
}
var closeTask = CloseAsync(WebSocketCloseStatus.Empty);
closeTask.Wait();
Connect();
}
catch (Exception ex)
{
SpeechWebSocketLogger.Log("### SpeechWebSocket.EXCEPTION ###");
OnError(new SpeechWebSocketEventErrorArgs(ex));
}
});
}