protected internal override Task <HttpResponseMessage> SendAsync(
HttpRequestMessage request, CancellationToken cancellationToken)
{
if (request == null)
{
throw new ArgumentNullException(nameof(request), SR.net_http_handler_norequest);
}
if (request.RequestUri.Scheme == UriSchemeHttps)
{
if (!s_supportsSSL)
{
throw new PlatformNotSupportedException(SR.Format(SR.net_http_unix_https_support_unavailable_libcurl, CurlVersionDescription));
}
}
else
{
Debug.Assert(request.RequestUri.Scheme == UriSchemeHttp, "HttpClient expected to validate scheme as http or https.");
}
if (request.Headers.TransferEncodingChunked.GetValueOrDefault() && (request.Content == null))
{
throw new InvalidOperationException(SR.net_http_chunked_not_allowed_with_empty_content);
}
if (_useCookie && _cookieContainer == null)
{
throw new InvalidOperationException(SR.net_http_invalid_cookiecontainer);
}
CheckDisposed();
SetOperationStarted();
// Do an initial cancellation check to avoid initiating the async operation if
// cancellation has already been requested. After this, we'll rely on CancellationToken.Register
// to notify us of cancellation requests and shut down the operation if possible.
if (cancellationToken.IsCancellationRequested)
{
return(Task.FromCanceled <HttpResponseMessage>(cancellationToken));
}
Guid loggingRequestId = s_diagnosticListener.LogHttpRequest(request);
// Create the easy request. This associates the easy request with this handler and configures
// it based on the settings configured for the handler.
var easy = new EasyRequest(this, request, cancellationToken);
try
{
EventSourceTrace("{0}", request, easy: easy, agent: _agent);
_agent.Queue(new MultiAgent.IncomingRequest {
Easy = easy, Type = MultiAgent.IncomingRequestType.New
});
}
catch (Exception exc)
{
easy.FailRequestAndCleanup(exc);
}
s_diagnosticListener.LogHttpResponse(easy.Task, loggingRequestId);
return(easy.Task);
}
