private async Task <Response> SendInternalAsync(Request request, HttpWebRequestState state, CancellationToken cancellationToken)
{
using (cancellationToken.Register(state.CancelRequest))
{
for (state.ConnectionAttempt = 1; state.ConnectionAttempt <= ConnectionAttempts; state.ConnectionAttempt++)
{
using (state)
{
if (state.RequestCancelled)
{
return(new Response(ResponseCode.Canceled));
}
state.Reset();
state.Request = HttpWebRequestFactory.Create(request, state.TimeRemaining);
HttpActionStatus status;
// (iloktionov): Шаг 1 - отправить тело запроса, если оно имеется.
if (state.RequestCancelled)
{
return(new Response(ResponseCode.Canceled));
}
if (request.Content != null)
{
status = await connectTimeLimiter.LimitConnectTime(SendRequestBodyAsync(request, state), request, state, ConnectionTimeout).ConfigureAwait(false);
if (status == HttpActionStatus.ConnectionFailure)
{
continue;
}
if (status != HttpActionStatus.Success)
{
return(ResponseFactory.BuildFailureResponse(status, state));
}
}
// (iloktionov): Шаг 2 - получить ответ от сервера.
if (state.RequestCancelled)
{
return(new Response(ResponseCode.Canceled));
}
status = request.Content != null
? await GetResponseAsync(request, state).ConfigureAwait(false)
: await connectTimeLimiter.LimitConnectTime(GetResponseAsync(request, state), request, state, ConnectionTimeout).ConfigureAwait(false);
if (status == HttpActionStatus.ConnectionFailure)
{
continue;
}
if (status != HttpActionStatus.Success)
{
return(ResponseFactory.BuildFailureResponse(status, state));
}
// (iloktionov): Шаг 3 - скачать тело ответа, если оно имеется.
if (!NeedToReadResponseBody(request, state))
{
return(ResponseFactory.BuildSuccessResponse(state));
}
if (state.RequestCancelled)
{
return(new Response(ResponseCode.Canceled));
}
status = await ReadResponseBodyAsync(request, state).ConfigureAwait(false);
return(status == HttpActionStatus.Success
? ResponseFactory.BuildSuccessResponse(state)
: ResponseFactory.BuildFailureResponse(status, state));
}
}
return(new Response(ResponseCode.ConnectFailure));
}
}