public override async Task<WebSocket> CreateWebSocketAsync(Uri address, WebHeaderCollection headers, ICredentials credentials,
WebSocketTransportSettings settings, TimeoutHelper timeoutHelper)
{
ClientWebSocket webSocket = new ClientWebSocket();
webSocket.Options.Credentials = credentials;
webSocket.Options.AddSubProtocol(settings.SubProtocol);
webSocket.Options.KeepAliveInterval = settings.KeepAliveInterval;
foreach (var headerObj in headers)
{
var header = headerObj as string;
webSocket.Options.SetRequestHeader(header, headers[header]);
}
var cancelToken = await timeoutHelper.GetCancellationTokenAsync();
await webSocket.ConnectAsync(address, cancelToken);
return webSocket;
}
private async Task<Message> ReadChunkedBufferedMessageAsync(Task<Stream> inputStreamTask, TimeoutHelper timeoutHelper)
{
try
{
return await _encoder.ReadMessageAsync(await inputStreamTask, _factory.BufferManager, _factory.MaxBufferSize, _contentType, await timeoutHelper.GetCancellationTokenAsync());
}
catch (XmlException xmlException)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(
new ProtocolException(SR.MessageXmlProtocolError, xmlException));
}
}
public async void WriteEndOfMessageAsync(Action<object> callback, object state)
{
if (TD.WebSocketAsyncWriteStartIsEnabled())
{
// TODO: Open bug about not emitting the hostname/port
TD.WebSocketAsyncWriteStart(
_webSocket.GetHashCode(),
0,
string.Empty);
}
var timeoutHelper = new TimeoutHelper(_closeTimeout);
var cancelTokenTask = timeoutHelper.GetCancellationTokenAsync();
try
{
var cancelToken = await cancelTokenTask;
await _webSocket.SendAsync(new ArraySegment<byte>(Array.Empty<byte>(), 0, 0), _outgoingMessageType, true, cancelToken);
if (TD.WebSocketAsyncWriteStopIsEnabled())
{
TD.WebSocketAsyncWriteStop(_webSocket.GetHashCode());
}
}
catch (Exception ex)
{
if (Fx.IsFatal(ex))
{
throw;
}
if (cancelTokenTask.Result.IsCancellationRequested)
{
throw Fx.Exception.AsError(
new TimeoutException(InternalSR.TaskTimedOutError(timeoutHelper.OriginalTimeout)));
}
throw WebSocketHelper.ConvertAndTraceException(ex, timeoutHelper.OriginalTimeout,
WebSocketHelper.SendOperation);
}
finally
{
callback.Invoke(state);
}
}
async void StartNextReceiveAsync()
{
Fx.Assert(_receiveTask == null || _receiveTask.Task.IsCompleted, "this.receiveTask is not completed.");
_receiveTask = new TaskCompletionSource<object>();
int currentState = Interlocked.CompareExchange(ref _asyncReceiveState, AsyncReceiveState.Started, AsyncReceiveState.Finished);
Fx.Assert(currentState == AsyncReceiveState.Finished, "currentState is not AsyncReceiveState.Finished: " + currentState);
if (currentState != AsyncReceiveState.Finished)
{
throw FxTrace.Exception.AsError(new InvalidOperationException());
}
try
{
if (_useStreaming)
{
if (_streamWaitTask != null)
{
//// Wait until the previous stream message finished.
await _streamWaitTask.Task;
}
_streamWaitTask = new TaskCompletionSource<object>();
}
if (_pendingException == null)
{
if (!_useStreaming)
{
await ReadBufferedMessageAsync();
}
else
{
byte[] buffer = _bufferManager.TakeBuffer(_receiveBufferSize);
bool success = false;
try
{
if (TD.WebSocketAsyncReadStartIsEnabled())
{
TD.WebSocketAsyncReadStart(_webSocket.GetHashCode());
}
try
{
WebSocketReceiveResult result;
TimeoutHelper helper = new TimeoutHelper(_asyncReceiveTimeout);
var cancelToken = await helper.GetCancellationTokenAsync();
result = await _webSocket.ReceiveAsync(new ArraySegment<byte>(buffer, 0, _receiveBufferSize), cancelToken);
CheckCloseStatus(result);
_pendingMessage = PrepareMessage(result, buffer, result.Count);
if (TD.WebSocketAsyncReadStopIsEnabled())
{
TD.WebSocketAsyncReadStop(
_webSocket.GetHashCode(),
result.Count,
String.Empty);
}
}
catch (AggregateException ex)
{
WebSocketHelper.ThrowCorrectException(ex, _asyncReceiveTimeout, WebSocketHelper.ReceiveOperation);
}
success = true;
}
catch (Exception ex)
{
if (Fx.IsFatal(ex))
{
throw;
}
_pendingException = WebSocketHelper.ConvertAndTraceException(ex, _asyncReceiveTimeout, WebSocketHelper.ReceiveOperation);
}
finally
{
if (!success)
{
_bufferManager.ReturnBuffer(buffer);
}
}
}
}
}
finally
{
if (Interlocked.CompareExchange(ref _asyncReceiveState, AsyncReceiveState.Finished, AsyncReceiveState.Started) == AsyncReceiveState.Started)
{
_receiveTask.SetResult(null);
}
}
}
protected override async Task CloseOutputSessionCoreAsync(TimeSpan timeout)
{
if (TD.WebSocketCloseOutputSentIsEnabled())
{
TD.WebSocketCloseOutputSent(
WebSocket.GetHashCode(),
_webSocketCloseDetails.OutputCloseStatus.ToString(),
RemoteAddress != null ? RemoteAddress.ToString() : string.Empty);
}
var helper = new TimeoutHelper(timeout);
var cancelToken = await helper.GetCancellationTokenAsync();
try
{
await CloseOutputAsync(cancelToken);
}
catch (Exception ex)
{
if (Fx.IsFatal(ex))
{
throw;
}
if (cancelToken.IsCancellationRequested)
{
throw Fx.Exception.AsError(new TimeoutException(InternalSR.TaskTimedOutError(timeout)));
}
throw WebSocketHelper.ConvertAndTraceException(ex, timeout, WebSocketHelper.ReceiveOperation);
}
}
