private async Task <OnvifClient> GetOnvifClient()
{
try
{
using (_ = await onvifClientLock.LockAsync(Token).ConfigureAwait(false))
{
if (onvifClientMain == null)
{
Uri deviceUri = new Uri(CameraSettings.CameraHost);
var credential = new NetworkCredential(CameraSettings.Login, CameraSettings.Password);
var timeout = TimeSpan.FromSeconds(60);
var connectionParameters = new ConnectionParameters(deviceUri, credential, timeout);
var onvifClientTemp = new OnvifClient(connectionParameters, timeout);
await onvifClientTemp.ConnectAsync(Token).ConfigureAwait(false);
this.onvifClientMain = onvifClientTemp;
}
return(this.onvifClientMain);
}
}
catch (Exception ex)
{
Trace.TraceError(Invariant($"[{CameraSettings.Name}]Failed to Connect to {CameraSettings.CameraHost} with {ex.GetFullMessage()}."));
throw;
}
}
private async Task ReceiveEvents()
{
while (!Token.IsCancellationRequested)
{
OnvifClient onvifClient = null;
try
{
await EnqueueEventsListeningInfo(false).ConfigureAwait(false);
onvifClient = await GetOnvifClient().ConfigureAwait(false);
onvifClient.EventReceived += OnvifClient_EventReceived;
await EnqueueEventsListeningInfo(true).ConfigureAwait(false);
await onvifClient.ReceiveAsync(Token).ConfigureAwait(false);
}
catch (Exception ex)
{
if (!ex.IsCancelException())
{
await ClearOnvifClient().ConfigureAwait(false);
}
await Task.Delay(1000).ConfigureAwait(false);
throw;
}
finally
{
if (onvifClient != null)
{
onvifClient.EventReceived -= OnvifClient_EventReceived;
}
await EnqueueEventsListeningInfo(false).ConfigureAwait(false);
}
}
}