code: @Override
  	protected void decode(ChannelHandlerContext paramChannelHandlerContext,
  			WebSocketFrame paramINBOUND_IN, List<Object> paramList)
  			throws Exception {
  		if(paramINBOUND_IN instanceof BinaryWebSocketFrame)
  		{
  			BinaryWebSocketFrame msg=(BinaryWebSocketFrame)paramINBOUND_IN;
  			ByteBuf data = msg.content();
  			paramList.add(data);
  			data.retain();
  		}
  	}
docs: 将webSocket消息转换为bytebuf类型,以适配后面的解码器