protected internal override Task <HttpResponseMessage> SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)
{
if (request == null)
{
throw new ArgumentNullException("request");
}
this.CheckDisposed();
this.SetOperationStarted();
var tcs = new TaskCompletionSource <HttpResponseMessage>();
var requestState = new HttpRequestState {
Tcs = tcs,
CancellationToken = cancellationToken,
RequestMessage = request
};
this._lastRequestUri = request.RequestUri;
try {
var httpWebRequest = this.CreateAndPrepareWebRequest(request);
requestState.WebRequest = httpWebRequest;
cancellationToken.Register(_onCancel, httpWebRequest);
Task.Factory.StartNew(this._startRequest, requestState);
}
catch (Exception ex) {
this.HandleAsyncException(requestState, ex);
}
return(tcs.Task);
}
private void HandleAsyncException(HttpRequestState state, Exception e)
{
HttpResponseMessage result;
if (this.TryGetExceptionResponse(e as WebException, state.RequestMessage, out result))
{
state.Tcs.TrySetResult(result);
return;
}
if (state.CancellationToken.IsCancellationRequested)
{
state.Tcs.TrySetCanceled();
return;
}
state.Tcs.TrySetException(e);
}
public ParserState ParseBuffer(
byte[] buffer,
int bytesReady,
ref int bytesConsumed)
{
if (buffer == null)
{
throw Error.ArgumentNull("buffer");
}
ParserState parseStatus = ParserState.NeedMoreData;
ParserState subParseStatus = ParserState.NeedMoreData;
switch (this._requestStatus)
{
case HttpRequestState.RequestLine:
try
{
subParseStatus = this._requestLineParser.ParseBuffer(buffer, bytesReady, ref bytesConsumed);
}
catch (Exception)
{
subParseStatus = ParserState.Invalid;
}
if (subParseStatus == ParserState.Done)
{
this._requestStatus = HttpRequestState.RequestHeaders;
subParseStatus = ParserState.NeedMoreData;
goto case HttpRequestState.RequestHeaders;
}
else if (subParseStatus != ParserState.NeedMoreData)
{
// Report error - either Invalid or DataTooBig
parseStatus = subParseStatus;
break;
}
break; // read more data
case HttpRequestState.RequestHeaders:
if (bytesConsumed >= bytesReady)
{
// we already can tell we need more data
break;
}
try
{
subParseStatus = this._headerParser.ParseBuffer(buffer, bytesReady, ref bytesConsumed);
}
catch (Exception)
{
subParseStatus = ParserState.Invalid;
}
if (subParseStatus == ParserState.Done)
{
parseStatus = subParseStatus;
}
else if (subParseStatus != ParserState.NeedMoreData)
{
parseStatus = subParseStatus;
break;
}
break; // need more data
}
return parseStatus;
}
private void StartGettingRequestStream(HttpRequestState state)
{
state.WebRequest.BeginGetRequestStream(this._getRequestStreamCallback, state);
}
private void StartGettingResponse(HttpRequestState state)
{
state.WebRequest.BeginGetResponse(this._getResponseCallback, state);
}
private void PrepareAndStartContentUpload(HttpRequestState state)
{
this.StartGettingRequestStream(state);
}
private void StartGettingResponse(HttpRequestState state)
{
state.WebRequest.BeginGetResponse(this._getResponseCallback, state);
}
private void StartGettingRequestStream(HttpRequestState state)
{
state.WebRequest.BeginGetRequestStream(this._getRequestStreamCallback, state);
}
private void PrepareAndStartContentUpload(HttpRequestState state)
{
this.StartGettingRequestStream(state);
}
private void HandleAsyncException(HttpRequestState state, Exception e)
{
HttpResponseMessage result;
if (this.TryGetExceptionResponse(e as WebException, state.RequestMessage, out result)) {
state.Tcs.TrySetResult(result);
return;
}
if (state.CancellationToken.IsCancellationRequested) {
state.Tcs.TrySetCanceled();
return;
}
state.Tcs.TrySetException(e);
}
protected internal override Task<HttpResponseMessage> SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)
{
if (request == null) {
throw new ArgumentNullException("request");
}
this.CheckDisposed();
this.SetOperationStarted();
var tcs = new TaskCompletionSource<HttpResponseMessage>();
var requestState = new HttpRequestState {
Tcs = tcs,
CancellationToken = cancellationToken,
RequestMessage = request
};
this._lastRequestUri = request.RequestUri;
try {
var httpWebRequest = this.CreateAndPrepareWebRequest(request);
requestState.WebRequest = httpWebRequest;
cancellationToken.Register(_onCancel, httpWebRequest);
Task.Factory.StartNew(this._startRequest, requestState);
}
catch (Exception ex) {
this.HandleAsyncException(requestState, ex);
}
return tcs.Task;
}
