public static async Task <ASConnection> AcceptConnectionAsync(AppServiceTriggerDetails e,
BackgroundTaskDeferral connectionDeferral, IObjectSerializer serializer)
{
// Receive connection request, send connection response
AppServiceRequest request = null;
AppServiceDeferral deferral = null;
var gotRequest = new SemaphoreSlim(0);
e.AppServiceConnection.RequestReceived += OnRequestReceived;
await gotRequest.WaitAsync();
e.AppServiceConnection.RequestReceived -= OnRequestReceived;
var message = serializer.DeserializeFromValueSet(request.Message);
if (message is ConnectionRequestMessage connectionRequest)
{
// Accept connection request
var connectionId = "AS_" + Guid.NewGuid();
var connectionResponse = new ConnectionResponseMessage(connectionId);
await request.SendResponseAsync(serializer.SerializeToValueSet(connectionResponse));
deferral.Complete();
return(new ASConnection(
connectionId, e.AppServiceConnection, connectionDeferral,
e.IsRemoteSystemConnection, serializer));
}
else
{
// Wrong message received => reject connection
var connectionResponse = new ConnectionResponseMessage(null);
await request.SendResponseAsync(serializer.SerializeToValueSet(connectionResponse));
deferral.Complete();
connectionDeferral.Complete();
e.AppServiceConnection.Dispose();
return(null);
}
void OnRequestReceived(AppServiceConnection _, AppServiceRequestReceivedEventArgs r)
{
request = r.Request;
deferral = r.GetDeferral();
gotRequest.Release();
}
}
internal static async Task <RespondResult> SendResponseAsync(this AppServiceRequest request, object message,
IObjectSerializer serializer)
{
var valueSet = serializer.SerializeToValueSet(message);
var internalStatus = await request.SendResponseAsync(valueSet);
var success = internalStatus == AppServiceResponseStatus.Success;
return(new RespondResult(success ? ResponseStatus.Success : ResponseStatus.Failure, internalStatus));
}
internal static async Task <RequestResult> SendMessageAsync(this AppServiceConnection connection, object message,
RequestOptions options, IObjectSerializer serializer)
{
var valueSet = serializer.SerializeToValueSet(message);
var internalResponse = await connection.SendMessageAsync(valueSet);
var success = internalResponse.Status == AppServiceResponseStatus.Success;
var responseMessage = (success && options.IsResponseRequired)
? serializer.DeserializeFromValueSet(internalResponse.Message)
: null;
return(new RequestResult(
responseMessage,
success ? RequestStatus.Success : RequestStatus.Failure,
internalResponse.Status));
}
