void SendAsyncCore(HttpRequestMessage request, object userState)
{
if (userState != null)
{
CancelManager.EnableCancel(request);
lock (pendingAsync)
{
HttpStageProcessingAsyncResult pend;
if (pendingAsync.TryGetValue(userState, out pend))
{
if (pend == null)
{
throw new ArgumentException("userState is not unique", "userState");
}
else
{
throw new ArgumentException("userState is already being used for " + pend.HttpAsyncState.request, "userState");
}
}
pendingAsync.Add(userState, null);
}
}
var operation = AsyncOperationManager.CreateOperation(userState);
var state = new SendAsyncState(this, operation);
var result = this.BeginSendCore(request, SendCompletedCallback, state);
if (userState != null && !result.IsCompleted)
{
lock (pendingAsync)
{
Debug.Assert(pendingAsync[userState] == null);
pendingAsync[userState] = result;
}
}
}
public static void EnableCancel(HttpRequestMessage request)
{
var manager = request.GetPropertyOrDefault<CancelManager>();
if (manager == null)
{
manager = new CancelManager();
request.Properties.Add(manager);
}
}
public static void EnableCancel(HttpRequestMessage request)
{
var manager = request.GetPropertyOrDefault <CancelManager>();
if (manager == null)
{
manager = new CancelManager();
request.Properties.Add(manager);
}
}
public HttpTransportAsyncResult(bool preferSync, HttpRequestMessage request, HttpWebRequestTransportSettings settings, AsyncCallback callback, object state)
: base(callback, state)
{
if (request.Uri == null)
{
throw new ArgumentNullException("request", "request.Uri is null");
}
if (!request.Uri.IsAbsoluteUri)
{
throw new UriFormatException("\"" + request.Uri + "\" is not an absolute URI");
}
this.stayedSync = true;
this.settings = settings;
this.request = request;
CancelManager.AddIfCancelManagerPresent(this.request, this);
CreateAndPrepareWebRequest(this);
if (!HttpContent.IsNullOrEmpty(request.Content))
{
var writer = request.Content;
Stream stream;
if (!preferSync)
{
stayedSync = false;
Trace(this, "Going async");
this.timedOutReason = TimeoutReason.GetRequestStream;
var result = webRequest.BeginGetRequestStream(EndGetRequestStreamAndWriteCallback, this);
Trace(this, "called BeginGetRequestStream");
if (result.CompletedSynchronously)
{
Trace(this, "BeginGetRequestStream completed synchronously");
stream = webRequest.EndGetRequestStream(result);
}
else
{
Trace(this, "went async for BeginGetRequestStream");
RegisterAbortTimeout(result, TimeoutReason.GetRequestStream);
return;
}
}
else
{
stream = this.webRequest.GetRequestStream();
}
WriteToRequestStream(this, stream, writer);
}
this.timedOutReason = TimeoutReason.GetResponse;
if (preferSync)
{
PopulateWebResponse(this, null, PopulateWebResponseSyncFunc);
}
else
{
var result = this.webRequest.BeginGetResponse(EndGetResponseCallback, this);
if (result.CompletedSynchronously)
{
this.stayedSync = true;
PopulateWebResponse(this, result, PopulateWebResponseEndSyncFunc);
}
else
{
this.stayedSync = false;
RegisterAbortTimeout(result, TimeoutReason.GetResponse);
}
}
}
