private async Task <Response> SendInternalAsync(Request request, WebRequestState state, TimeSpan?connectionTimeout, CancellationToken cancellationToken)
{
CancellationTokenRegistration registration;
try
{
registration = cancellationToken.Register(state.CancelRequest);
}
catch (ObjectDisposedException)
{
return(Responses.Canceled);
}
using (registration)
using (state)
{
if (state.RequestCanceled)
{
return(Responses.Canceled);
}
state.Request = WebRequestFactory.Create(request, state.TimeRemaining, Settings, log);
HttpActionStatus status;
// Step 1: send request body if it was supplied in request.
if (state.RequestCanceled)
{
return(Responses.Canceled);
}
if (request.HasBody)
{
status = await connectTimeLimiter
.LimitConnectTime(SendRequestBodyAsync(request, state, cancellationToken), request, state, connectionTimeout)
.ConfigureAwait(false);
if (status != HttpActionStatus.Success)
{
return(responseFactory.BuildFailureResponse(status, state));
}
}
// Step 2: receive response from server.
if (state.RequestCanceled)
{
return(Responses.Canceled);
}
status = request.HasBody
? await GetResponseAsync(request, state).ConfigureAwait(false)
: await connectTimeLimiter.LimitConnectTime(GetResponseAsync(request, state), request, state, connectionTimeout).ConfigureAwait(false);
if (status != HttpActionStatus.Success)
{
return(responseFactory.BuildFailureResponse(status, state));
}
// Step 3 - download request body if it exists.
if (!NeedToReadResponseBody(request, state))
{
return(responseFactory.BuildSuccessResponse(state));
}
if (ResponseBodyIsTooLarge(state))
{
state.CancelRequestAttempt();
return(responseFactory.BuildResponse(ResponseCode.InsufficientStorage, state));
}
if (state.RequestCanceled)
{
return(Responses.Canceled);
}
if (NeedToStreamResponseBody(state))
{
state.ReturnStreamDirectly = true;
state.PreventNextDispose();
return(responseFactory.BuildSuccessResponse(state));
}
status = await ReadResponseBodyAsync(request, state, cancellationToken)
.ConfigureAwait(false);
return(status == HttpActionStatus.Success
? responseFactory.BuildSuccessResponse(state)
: responseFactory.BuildFailureResponse(status, state));
}
}