// 重写基类的方法，当消息到达时触发，这里收到消息后，在控制台输出收到的内容，并原样返回了客户端
public override void ChannelRead(IChannelHandlerContext context, object message)
{
try
{
var buf = message as IByteBuffer;
// 读取完整消息到字节数组
int remaining = buf.ReadableBytes;
byte[] messageBytes = new byte[remaining];
buf.GetBytes(0, messageBytes);
// 解析消息字节数组为JT808Message对象
JT808Message result = JT808ProtoDecoder.Decode(messageBytes);
// 网关接收数据时间
//string gatewaytime = DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss");
//消息正文
//byte[] cmdconent = result.MsgBody;
result.channel = context;
msgProcessService.processMessageData(result);
}
catch (Exception ex)
{
logger.Error(ex, "解析数据时出错{0}", ex.Message);
}
}
/// <summary>
/// 将消息按JT/T 808协议进行编码为字节数组
/// </summary>
/// <returns></returns>
public byte[] Encode()
{
if (MsgHeader == null)
{
throw new Exception("Field: msgHead cannot be null.");
}
// 消息头编码
byte[] msgHeadBytes = MsgHeader.Encode();
// body
byte[] msgBodyBytes = null;
if (MsgBody != null)
{
msgBodyBytes = MsgBody;
}
// 构建消息（不包含校验码和头尾标识）
byte[] message = null;
if (msgBodyBytes != null)
{
ByteBuffer msgbuf = ByteBuffer.Allocate(
msgHeadBytes.Length + msgBodyBytes.Length);
msgbuf.Put(msgHeadBytes);
msgbuf.Put(msgBodyBytes);
message = msgbuf.Array();
}
else
{
message = msgHeadBytes;
}
// 计算校验码
byte checkCode = JT808ProtoDecoder.CheckCode(message);
ByteBuffer checkedBuffer = ByteBuffer.Allocate(message.Length + 1);
checkedBuffer.Put(message);
checkedBuffer.Put(checkCode);
byte[] checkedMessage = checkedBuffer.Array();
// 转义
byte[] escapedMessage = JT808ProtoDecoder.Escape(checkedMessage);
// 增加标识位
ByteBuffer buffer = ByteBuffer.Allocate(escapedMessage.Length + 2);
buffer.Put(JT808Constant.PKG_DELIMITER);
buffer.Put(escapedMessage);
buffer.Put(JT808Constant.PKG_DELIMITER);
return(buffer.Array());
}
/// <summary>
/// 编码消息头为字节数组
/// </summary>
/// <returns></returns>
public byte[] Encode()
{
int capacity = 12;
byte[] splitInfoBytes = null;
if (SplitInfo != null)
{
splitInfoBytes = SplitInfo.Encode();
capacity += splitInfoBytes.Length;
}
if (MsgBodyAttr == null)
{
throw new Exception("Field: msgBodyAttr cannot be null.");
}
ByteBuffer buffer = ByteBuffer.Allocate(capacity);
buffer.PutShort(MessageId);
buffer.Put(MsgBodyAttr.Encode());
// mobile
if (TerminalId.Length > JT808Constant.MAX_MOBILE_LENGTH)
{
throw new Exception(
"Field: mobile=" + TerminalId
+ ", but max allowable value is "
+ JT808Constant.MAX_MOBILE_LENGTH + ".");
}
buffer.Put(JT808ProtoDecoder.Mobile2bcd6(TerminalId));
buffer.PutShort(this.MessageSerial);
if (splitInfoBytes != null)
{
buffer.Put(splitInfoBytes);
}
return(buffer.Array());
}
