public IEnumerator <ITask> QueryFrameHandler(webcam.QueryFrame query)
{
if (_state.FramesOnDemand)
{
var request = new InternalFrameRequest
{
DsspQuery = query
};
_frameRequestPort.Post(request);
yield return(Arbiter.Receive(false, request.ResponsePort, EmptyHandler));
}
else if (_state.Image == null)
{
query.ResponsePort.Post(new webcam.QueryFrameResponse());
}
else
{
ReplyToQueryFrame(query, _state.Image);
}
}
IEnumerator <ITask> HttpHandler(HttpListenerContext context, PortSet <HttpResponseType, Fault> responsePort)
{
HttpListenerRequest request = context.Request;
HttpListenerResponse response = context.Response;
bool alternate = false;
string path = request.Url.AbsolutePath.ToLower(ci.InvariantCulture);
if (path.StartsWith(_alternatePrefix))
{
alternate = true;
path = path.Substring(_alternatePrefix.Length);
}
else if (path.StartsWith(_prefix))
{
path = path.Substring(_prefix.Length);
}
string type;
ImageFormat format;
switch (path)
{
case "/jpeg":
case "/jpg":
type = MediaTypeNames.Image.Jpeg;
format = ImageFormat.Jpeg;
break;
case "/bmp":
type = "image/bmp";
format = ImageFormat.Bmp;
break;
case "/png":
type = "image/png";
format = ImageFormat.Png;
break;
#if !URT_MINCLR
case "/tif":
case "/tiff":
type = "image/tiff";
format = ImageFormat.Tiff;
break;
#endif
case "/gif":
type = MediaTypeNames.Image.Gif;
format = ImageFormat.Gif;
break;
default:
if (alternate)
{
responsePort.Post(new HttpResponseType(HttpStatusCode.OK, _state.ToGenericState(), _transform));
}
else if (path == "/log")
{
var log = new PipeServerOutput();
lock (_pipeServerOutput)
{
log.Output = new List <string>(_pipeServerOutput);
}
responsePort.Post(new HttpResponseType(log));
}
else
{
responsePort.Post(new HttpResponseType(HttpStatusCode.OK, _state, _transform));
}
yield break;
}
if (_state.Image == null)
{
if (_state.FramesOnDemand)
{
if (_state.Selected != null &&
_state.Selected.Started)
{
var internalRequest = new InternalFrameRequest
{
Context = context,
Type = type,
Format = format
};
_frameRequestPort.Post(internalRequest);
// _state.Selected.FrameGrabber.ResumeCapture();
yield return(Arbiter.Receive(false, internalRequest.ResponsePort, EmptyHandler));
// _state.Selected.FrameGrabber.PauseCapture();
}
}
else if (alternate)
{
responsePort.Post(new HttpResponseType(HttpStatusCode.NotFound, _state.ToGenericState(), _transform));
}
else
{
responsePort.Post(new HttpResponseType(HttpStatusCode.NotFound, _state, _transform));
}
yield break;
}
using (MemoryStream stream = new MemoryStream())
{
_state.Image.Save(stream, format);
stream.Position = 0;
yield return(Arbiter.Choice(
WriteImageToHttpResponse(context, type, stream),
success => stream.Close(),
exception => { stream.Close(); LogWarning("Writing image to stream:" + exception.Message); }
));
}
}
