public IEnumerator <ITask> HttpPostHandler(HttpPost post)
{
Fault fault = null;
NameValueCollection collection = null;
ReadFormData readForm = new ReadFormData(post);
_utilitiesPort.Post(readForm);
yield return(Arbiter.Choice(
readForm.ResultPort,
delegate(NameValueCollection col)
{
collection = col;
},
delegate(Exception e)
{
fault = Fault.FromException(e);
LogError(null, "Error processing form data", fault);
}
));
if (fault != null)
{
post.ResponsePort.Post(fault);
yield break;
}
if (!string.IsNullOrEmpty(collection["ChangeCamera"]))
{
string device = string.Empty;
try
{
device = collection["Camera"];
}
catch (Exception e)
{
fault = Fault.FromException(e);
LogError(null, "Error reading form data", fault);
}
if (fault != null)
{
post.ResponsePort.Post(fault);
yield break;
}
UpdateDeviceRequest request = new UpdateDeviceRequest();
request.Selected.DevicePath = device;
UpdateDevice update = new UpdateDevice();
update.Body = request;
SpawnIterator(update, UpdateDeviceHandler);
yield return(Arbiter.Choice(
update.ResponsePort,
delegate(DefaultUpdateResponseType success)
{
SaveState(_state);
},
delegate(Fault f)
{
fault = f;
LogError(null, "Unable to change camera", fault);
}
));
}
else if (!string.IsNullOrEmpty(collection["ChangeFormat"]))
{
int formatIndex = 0;
Format format = null;
try
{
formatIndex = int.Parse(collection["CaptureFormat"]);
format = _state.Selected.SupportedFormats[formatIndex - 1];
}
catch (Exception e)
{
fault = Fault.FromException(e);
LogError(null, "Error parsing form data", fault);
}
if (fault != null)
{
post.ResponsePort.Post(fault);
yield break;
}
UpdateFormat update = new UpdateFormat();
update.Body = format;
SpawnIterator(update, UpdateFormatHandler);
yield return(Arbiter.Choice(
update.ResponsePort,
delegate(DefaultUpdateResponseType success)
{
SaveState(_state);
},
delegate(Fault f)
{
fault = f;
LogError(null, "Unable to change format", fault);
}
));
}
if (fault != null)
{
post.ResponsePort.Post(fault);
yield break;
}
post.ResponsePort.Post(new HttpResponseType(HttpStatusCode.OK, _state, _transform));
yield break;
}
IEnumerator <ITask> GetInitialState(WebCamState initialState)
{
bool deviceSelected = false;
try
{
WebCamState state = new WebCamState();
state.CaptureFile = initialState.CaptureFile;
state.Quality = initialState.Quality;
state.FramesOnDemand = initialState.FramesOnDemand;
#if !URT_MINCLR
yield return(InitializeInternalService());
#endif
Port <EmptyValue> completion = new Port <EmptyValue>();
SpawnIterator(state, completion, RefreshCameraList);
yield return(Arbiter.Receive(false, completion, EmptyHandler));
state.Image = null;
Replace replace = new Replace();
replace.Body = state;
_fwdPort.Post(replace);
yield return(Arbiter.Choice(
replace.ResponsePort,
delegate(DefaultReplaceResponseType success) { },
delegate(Fault fault)
{
LogError(null, "Unable to set camera list", fault);
}
));
int deviceIndex;
if (initialState.Selected != null &&
(!string.IsNullOrEmpty(initialState.Selected.DevicePath) ||
!string.IsNullOrEmpty(initialState.Selected.FriendlyName)))
{
deviceIndex = -1;
}
else
{
deviceIndex = 0;
}
bool gotDevice = false;
while (deviceIndex < state.Cameras.Count && !gotDevice)
{
UpdateDeviceRequest request = new UpdateDeviceRequest();
if (deviceIndex < 0)
{
request.Selected = initialState.Selected;
request.Selected.InUse = false;
}
else if (deviceIndex < state.Cameras.Count)
{
request.Selected = state.Cameras[deviceIndex];
}
if (!request.Selected.InUse)
{
UpdateDevice update = new UpdateDevice();
update.Body = request;
_fwdPort.Post(update);
yield return(Arbiter.Choice(
update.ResponsePort,
success => gotDevice = true,
fault => LogInfo("Unable to select camera: " + deviceIndex + ": " + fault)
));
}
else
{
LogInfo("Not trying camera (InUse = true): " + deviceIndex);
}
deviceIndex++;
}
if (!gotDevice)
{
LogError("Unable to select device");
yield break;
}
deviceSelected = true;
if (initialState.Selected == null ||
initialState.Selected.Format == null)
{
yield break;
}
UpdateFormat updateFormat = new UpdateFormat();
updateFormat.Body = initialState.Selected.Format;
_fwdPort.Post(updateFormat);
yield return(Arbiter.Choice(
updateFormat.ResponsePort,
delegate(DefaultUpdateResponseType success) { },
delegate(Fault fault)
{
LogError(null, "Unable to select format", fault);
}
));
}
finally
{
if (deviceSelected)
{
DirectoryInsert();
}
else
{
LogWarning(LogGroups.Console, "Dropping webcam service, no cameras found");
_fwdPort.Post(new DsspDefaultDrop());
}
}
}
