public DownstreamPayload Decode(byte[] bytes)
{
var(headerLength, payloadLength) = DecodeLengths(bytes);
PacketHeader header = DecodeHeader(bytes, headerLength, PrintHeader);
byte[] payload;
if (header.EncryptionMode == PacketHeader.Types.EncryptionMode.KEncryptionNone)
{
payload = new byte[payloadLength];
Array.Copy(bytes, Offset + headerLength, payload, 0, payloadLength);
}
else
{
var key = header.EncryptionMode == PacketHeader.Types.EncryptionMode.KEncryptionServiceToken ? SecurityKey : SessionKey;
payload = Decrypt(bytes, headerLength, payloadLength, key);
}
if (payload.Length != header.DecodedPayloadLen)
{
#if DEBUG
Console.WriteLine("Payload length does not match");
Console.WriteLine(Convert.ToBase64String(payload));
#endif
return(null);
}
DownstreamPayload downstream = DownstreamPayload.Parser.ParseFrom(payload);
if (downstream.Command == "Push.ZtLiveInteractive.Message")
{
HeaderSeqId = header.SeqId;
}
return(downstream);
}
async void HandleCommand(DownstreamPayload stream, System.Timers.Timer heartbeatTimer)
{
if (stream == null)
{
return;
}
switch (stream.Command)
{
case Command.GLOBAL_COMMAND:
ZtLiveCsCmdAck cmd = ZtLiveCsCmdAck.Parser.ParseFrom(stream.PayloadData);
switch (cmd.CmdAckType)
{
case GlobalCommand.ENTER_ROOM_ACK:
var enterRoom = ZtLiveCsEnterRoomAck.Parser.ParseFrom(cmd.Payload);
heartbeatTimer.Interval = enterRoom.HeartbeatIntervalMs;
heartbeatTimer.Start();
break;
case GlobalCommand.HEARTBEAT_ACK:
var heartbeat = ZtLiveCsHeartbeatAck.Parser.ParseFrom(cmd.Payload);
break;
default:
Console.WriteLine("Unhandled Global.ZtLiveInteractive.CsCmd: {0}", cmd.CmdAckType);
Console.WriteLine(cmd);
break;
}
break;
case Command.KEEP_ALIVE:
var keepalive = KeepAliveResponse.Parser.ParseFrom(stream.PayloadData);
break;
case Command.PING:
var ping = PingResponse.Parser.ParseFrom(stream.PayloadData);
break;
case Command.UNREGISTER:
var unregister = UnregisterResponse.Parser.ParseFrom(stream.PayloadData);
await client.CloseAsync(WebSocketCloseStatus.NormalClosure, "Unregister", default);
break;
case Command.PUSH_MESSAGE:
if (client.State == WebSocketState.Open)
{
await client.SendAsync(PushMessage(), WebSocketMessageType.Binary, true, default);
}
ZtLiveScMessage message = ZtLiveScMessage.Parser.ParseFrom(stream.PayloadData);
var payload = message.CompressionType == ZtLiveScMessage.Types.CompressionType.Gzip ? Decompress(message.Payload) : message.Payload;
switch (message.MessageType)
{
case Enums.PushMessage.ACTION_SIGNAL:
// Handled by user
Handler(message.MessageType, payload.ToByteArray());
break;
case Enums.PushMessage.STATE_SIGNAL:
// Handled by user
Handler(message.MessageType, payload.ToByteArray());
break;
case Enums.PushMessage.STATUS_CHANGED:
var statusChanged = ZtLiveScStatusChanged.Parser.ParseFrom(payload);
if (statusChanged.Type == ZtLiveScStatusChanged.Types.Type.LiveClosed || statusChanged.Type == ZtLiveScStatusChanged.Types.Type.LiveBanned)
{
await Stop("Live closed");
}
break;
case Enums.PushMessage.TICKET_INVALID:
var ticketInvalid = ZtLiveScTicketInvalid.Parser.ParseFrom(payload);
TicketIndex = (TicketIndex + 1) % Tickets.Length;
await client.SendAsync(EnterRoom(), WebSocketMessageType.Binary, true, default);
break;
}
break;
default:
if (stream.ErrorCode > 0)
{
Console.WriteLine("Error： {0} - {1}", stream.ErrorCode, stream.ErrorMsg);
Console.WriteLine(stream.ErrorData.ToBase64());
}
else
{
Console.WriteLine("Unhandled DownstreamPayload command: {0}", stream.Command);
Console.WriteLine(stream);
}
break;
}
}
