public HostWebSocket(int id, string url, IEnumerable <string> protocols, dynamic callback,
ScheduleTaskHandler scheduler) :
base(scheduler)
{
_id = id;
_cancellationTokenSource = new CancellationTokenSource();
_socket = new ClientWebSocket();
foreach (var protocol in protocols)
{
_socket.Options.AddSubProtocol(protocol);
}
//_socket.Options.UseDefaultCredentials = true;
MemoryStream ms = null;
var buffer = new byte[4096];
Schedule($"{nameof(HostWebSocket)}[{id}]", _cancellationTokenSource.Token,
async cancellationToken =>
{
try
{
await _socket.ConnectAsync(new Uri(url), cancellationToken);
}
catch (OperationCanceledException) { /* ignore */ }
catch (WebSocketException e)
{
callback("error", e.GetBaseException().Message);
return;
}
callback("open", null);
while (true)
{
var receiveTask = _socket.ReceiveAsync(new ArraySegment <byte>(buffer), cancellationToken);
var result = await receiveTask;
ms = ms ?? new MemoryStream();
await ms.WriteAsync(buffer, 0, result.Count, cancellationToken);
if (result.EndOfMessage)
{
var data = Encoding.UTF8.GetString(ms.ToArray());
ms = null;
try
{
callback("receive", data);
}
catch (Exception e)
{
ErrorLog?.Invoke(this, e, null);
}
}
}
// ReSharper disable once FunctionNeverReturns
});
}
public TimerService(ScheduleTaskHandler scheduler) :
base(scheduler)
{
}
public Host(Action <string> loader,
ConsoleService console,
TaskScheduler taskScheduler)
{
_loader = loader ?? throw new ArgumentNullException(nameof(loader));
if (taskScheduler == null)
{
throw new ArgumentNullException(nameof(taskScheduler));
}
var scheduler = _scheduler = Schedule;
Console = console;
Timer = new TimerService(scheduler);
Xhr = new XhrService(scheduler);
void Schedule(ILogSource source, string name, CancellationToken cancellationToken,
Func <CancellationToken, Task> onSchedule,
Action <Exception> onError,
Action <OperationCanceledException> onCancel,
Action onFinally)
{
var task =
AsyncTask.Create(name,
async thisTask =>
{
try
{
await onSchedule(cancellationToken);
TaskFinishing?.Invoke(this, thisTask);
thisTask.FlagSuccess();
}
catch (OperationCanceledException e)
{
try
{
source.WarnLog?.Invoke(source, e, name);
onCancel?.Invoke(e);
}
finally
{
TaskFinishing?.Invoke(this, thisTask);
thisTask.FlagCanceled(e.CancellationToken);
}
}
catch (Exception e)
{
try
{
source.ErrorLog?.Invoke(source, e, name);
onError?.Invoke(e);
}
finally
{
TaskFinishing?.Invoke(this, thisTask);
thisTask.FlagError(e);
}
}
finally
{
try
{
onFinally?.Invoke();
}
finally
{
TaskFinished?.Invoke(this, thisTask);
}
}
});
TaskStarting?.Invoke(this, task);
task.Start(taskScheduler);
}
}