private async Task Connection_PacketReceived(object sender, PacketReceivedEventArgs args)
{
if (sender == null)
{
throw new ArgumentNullException(nameof(sender));
}
Interlocked.Increment(ref _packetCount);
if (typeof(RequestPacket).IsAssignableFrom(args.Packet.GetPacketType()))
{
if (!string.IsNullOrWhiteSpace(args.Packet.Destination))
{
var sendCount = 0;
var connections = ConnectionProvider.GetConnections(args.Packet.Destination, true).ToArray();
Log.Info($"Sending {args.Packet} to {connections.Length} connections: {string.Join(",", connections.Take(10))}");
try {
foreach (var connection in connections)
{
try {
var response = await connection.Send(args.Packet);
if (args.Packet.Flags.HasFlag(PacketFlag.AckRequired))
{
if (response == null)
{
throw new ErrorResponseException(ErrorResponseCodes.UnhandledRequest, $"Packet {args.Packet} routed to {args.Packet.Destination}, but they didn't handle the request.", false);
}
var responsePacket = (ResponsePacket)response;
await args.Connection.Respond(args.PacketId, responsePacket);
}
sendCount++;
} catch (Exception ex) when(!(ex is ErrorResponseException))
{
Log.Warn(ex);
}
}
if (sendCount < 1)
{
Log.Warn($"Unable to deliver packet to user {args.Packet.Destination}, they are offline or the destination is invalid.");
throw new ErrorResponseException(ErrorResponseCodes.UserOffline, $"Unable to deliver packet to user {args.Packet.Destination}, they are offline of the destination is invalid.", false);
}
} catch (ErrorResponseException ex) {
var err = new ErrorResponseData(ex.Code, ex.Message, ex.IsCritical);
await args.Connection.Respond(args.PacketId, new ResponsePacket(err));
}
Log.Info($"Sent {args.Packet} to {sendCount} clients");
args.IsHandled = true;
}
}
}
public ErrorResponseException(ErrorResponseData data)
: this(data.Code, data.Message, data.IsCritical)
{
}