private async Task ReceiveMessagesAsync(
CancellationToken cancellationToken)
{
using (var combined = CancellationTokenSource
.CreateLinkedTokenSource(cancellationToken, _cts.Token))
{
while (!_context.CloseStatus.HasValue ||
!combined.IsCancellationRequested)
{
GenericOperationMessage message = await _context
.ReceiveMessageAsync(combined.Token);
if (message == null)
{
await _context.SendConnectionKeepAliveMessageAsync(
combined.Token).ConfigureAwait(false);
}
else
{
await HandleMessage(message, combined.Token)
.ConfigureAwait(false);
}
}
}
}
public async Task StartAsync(CancellationToken cancellationToken)
{
using (var combined = CancellationTokenSource
.CreateLinkedTokenSource(cancellationToken, _cts.Token))
{
while (!_webSocket.Closed || !combined.IsCancellationRequested)
{
await _webSocket
.ReceiveMessageAsync(_writer, combined.Token)
.ConfigureAwait(false);
await WriteMessageDelimiterAsync(combined.Token)
.ConfigureAwait(false);
}
_writer.Complete();
}
}
public static async Task <GenericOperationMessage> ReceiveMessageAsync(
this IWebSocketContext context,
CancellationToken cancellationToken)
{
using (var messageStream = new MemoryStream())
{
await context.ReceiveMessageAsync(
messageStream,
cancellationToken);
string json = Encoding.UTF8.GetString(messageStream.ToArray());
if (string.IsNullOrEmpty(json?.Trim()))
{
return(null);
}
return(JsonConvert
.DeserializeObject <GenericOperationMessage>(json));
}
}