protected override bool DoDecode(ByteBuffer input, IProtocolDecoderOutput output) { MessageDecoderResult result; if (_currentDecoder == null) { IMessageDecoder[] decoders = _decoders; int undecodables = 0; for (int i = decoders.Length - 1; i >= 0; i--) { IMessageDecoder decoder = decoders[i]; int limit = input.Limit; int pos = input.Position; try { result = decoder.Decodable(input); } finally { input.Position = pos; input.Limit = limit; } if (result == MessageDecoderResult.OK) { _currentDecoder = decoder; break; } else if (result == MessageDecoderResult.NOT_OK) { undecodables++; } else if (result != MessageDecoderResult.NEED_DATA) { throw new Exception("Unexpected decode result (see your decodable()): " + result); } } if (undecodables == _decoders.Length) { // Throw an exception if all decoders cannot decode data. input.Position = input.Limit; // Skip data throw new ProtocolDecoderException( "No appropriate message decoder: " + input.GetHexDump()); } if (_currentDecoder == null) { // Decoder is not determined yet (i.e. we need more data) return(false); } } result = _currentDecoder.Decode(input, output); if (result == MessageDecoderResult.OK) { _currentDecoder = null; return(true); } else if (result == MessageDecoderResult.NEED_DATA) { return(false); } else if (result == MessageDecoderResult.NOT_OK) { throw new ProtocolDecoderException("Message decoder returned NOT_OK."); } else { throw new Exception("Unexpected decode result (see your decode()): " + result); } }
/// <inheritdoc/> protected override bool DoDecode(IoSession session, IoBuffer input, IProtocolDecoderOutput output) { State state = GetState(session); if (state.currentDecoder == null) { IMessageDecoder[] decoders = state.decoders; int undecodables = 0; for (int i = decoders.Length - 1; i >= 0; i--) { IMessageDecoder decoder = decoders[i]; int limit = input.Limit; int pos = input.Position; MessageDecoderResult result; try { result = decoder.Decodable(session, input); } finally { input.Position = pos; input.Limit = limit; } if (result == MessageDecoderResult.OK) { state.currentDecoder = decoder; break; } else if (result == MessageDecoderResult.NotOK) { undecodables++; } else if (result != MessageDecoderResult.NeedData) { throw new InvalidOperationException("Unexpected decode result (see your decodable()): " + result); } } if (undecodables == decoders.Length) { // Throw an exception if all decoders cannot decode data. String dump = input.GetHexDump(); input.Position = input.Limit; // Skip data //seem to be a bug not remove session buffer //add code to remove session buffer. RemoveSessionBuffer(session); ProtocolDecoderException e = new ProtocolDecoderException("No appropriate message decoder: " + dump); e.Hexdump = dump; throw e; } if (state.currentDecoder == null) { // Decoder is not determined yet (i.e. we need more data) return(false); } } try { MessageDecoderResult result = state.currentDecoder.Decode(session, input, output); if (result == MessageDecoderResult.OK) { state.currentDecoder = null; return(true); } else if (result == MessageDecoderResult.NeedData) { return(false); } else if (result == MessageDecoderResult.NotOK) { state.currentDecoder = null; throw new ProtocolDecoderException("Message decoder returned NOT_OK."); } else { state.currentDecoder = null; throw new InvalidOperationException("Unexpected decode result (see your decode()): " + result); } } catch (Exception) { state.currentDecoder = null; throw; } }