public Task <HttpActionStatus> LimitConnectTime(Task <HttpActionStatus> mainTask, Request request, WebRequestState state, TimeSpan?connectTimeout)
{
if (connectTimeout == null)
{
return(mainTask);
}
if (!ConnectTimeoutHelper.CanCheckSocket)
{
return(mainTask);
}
if (state.TimeRemaining < connectTimeout.Value)
{
return(mainTask);
}
if (request.Url.IsLoopback)
{
return(mainTask);
}
if (ConnectTimeoutHelper.IsSocketConnected(state.Request, log))
{
return(mainTask);
}
return(LimitConnectTimeInternal(mainTask, request, state, connectTimeout.Value));
}
private async Task <HttpActionStatus> LimitConnectTimeInternal(Task <HttpActionStatus> mainTask, Request request, WebRequestState state, TimeSpan connectTimeout)
{
using (var timeoutCancellation = new CancellationTokenSource())
{
var completedTask = await Task.WhenAny(mainTask, Task.Delay(connectTimeout, timeoutCancellation.Token)).ConfigureAwait(false);
if (completedTask is Task <HttpActionStatus> taskWithResult)
{
timeoutCancellation.Cancel();
return(taskWithResult.GetAwaiter().GetResult());
}
if (!ConnectTimeoutHelper.IsSocketConnected(state.Request, log))
{
state.CancelRequestAttempt();
LogConnectionFailure(request, new WebException($"Connection attempt timed out. Timeout = {connectTimeout.ToPrettyString()}.", WebExceptionStatus.ConnectFailure));
return(HttpActionStatus.ConnectionFailure);
}
return(await mainTask.ConfigureAwait(false));
}
}