SOMS/OperationsMainSiteGatewayServer/TcpSocket/Server/DotNettyTcpServer.cs

using Abp.Dependency;
using DotNetty.Buffers;
using DotNetty.Codecs;
using DotNetty.Transport.Bootstrapping;
using DotNetty.Transport.Channels;
using DotNetty.Transport.Channels.Sockets;
using Serilog;
using System.Diagnostics;
using System.Runtime;

namespace Yunda.SOMS.OperationsMainSiteGatewayServer.TcpSocket.Server
{
    public class DotNettyTcpServer : ISingletonDependency
    {
        private readonly Dictionary<byte, IChannelHandlerContext> connections = new Dictionary<byte, IChannelHandlerContext>();
        // 定义 MessageReceived 事件
        public event Action< byte, byte[], byte> MessageReceived; // 装置地址，功能码，消息

        public event Action<Dictionary<byte, int[]>> deviceBoardStatesAction;
        public DotNettyTcpServer()
        {
            //_dotNettyServerHandler = dotNettyServerHandler;
        }
        MultithreadEventLoopGroup bossGroup ;
        MultithreadEventLoopGroup workerGroup ;
        int maxFrameLength = 65536;          // 设置最大帧长度
        int lengthFieldOffset = 1;          // 长度字段的偏移量，从启动字符之后开始
        int lengthFieldLength = 2;          // 长度字段的字节长度
        int lengthAdjustment = -3;          // 长度调整，将读取的长度减去启动字符和长度字段的字节数
        int initialBytesToStrip = 0;        // 保留所有字节

        public  async Task RunServerAsync(byte addr)
        {
            bossGroup = new MultithreadEventLoopGroup(1);
            workerGroup = new MultithreadEventLoopGroup();
            try
            {
                GCSettings.LatencyMode = GCLatencyMode.LowLatency;
                var bootstrap = new ServerBootstrap();
                bootstrap.Group(bossGroup, workerGroup)
                    .Channel<TcpServerSocketChannel>()
                    .Option(ChannelOption.SoBacklog, 100)
                    .ChildHandler(new ActionChannelInitializer<IChannel>(channel =>
                    {
                        channel.Pipeline.AddLast(new LengthFieldBasedFrameDecoder(
                            maxFrameLength,
                            lengthFieldOffset,
                            lengthFieldLength,
                            lengthAdjustment,
                            initialBytesToStrip
                        ));
                        channel.Pipeline.AddLast(new DotNettyServerHandler(connections, MessageReceived, deviceBoardStatesAction,addr));
                        channel.Pipeline.AddLast("hexDumpHandler", new HexDumpHandler());
                    }));

                IChannel boundChannel = await bootstrap.BindAsync(3000);
                Log.Information("服务器启动并监听端口 3000...");
            }
            finally
            {
              
            }
        }

        public async Task StopSeverAsync()
        {
            try
            {
                await Task.WhenAll(
                bossGroup.ShutdownGracefullyAsync(TimeSpan.FromMilliseconds(100), TimeSpan.FromSeconds(1)),
                workerGroup.ShutdownGracefullyAsync(TimeSpan.FromMilliseconds(100), TimeSpan.FromSeconds(1)));
            }
            catch (Exception ex)
            {
                Log.Information("服务器关闭并监听端口 7110...", "获取信息");
            }
            
        }
        public async void SendMessageByIp(byte address, byte controlWord, byte functionCode , byte message)
        {
            if (connections.TryGetValue(address, out IChannelHandlerContext context))
            {
                try
                {
                    //var buffer = Unpooled.WrappedBuffer(System.Text.Encoding.UTF8.GetBytes(message));
                    //context.WriteAndFlushAsync(buffer);
                    // 构建数据帧
                    byte[] buffer = new byte[7];

                    // 填入启动字符
                    buffer[0] = 0x16;

                    // 填入长度（假设数据部分为50字节，2字节长度字段+1字节地址+1字节标志位）
                    byte dataLength = 7;
                    buffer[1] = 0;      // 长度低字节
                    buffer[2] = dataLength; // 长度高字节

                    // 填入地址、应用控制字、功能类型
                    buffer[3] = address;  // 示例地址
                    buffer[4] = controlWord;  // 示例应用控制字
                    buffer[5] = functionCode;  // 示例功能类型
                    buffer[6] = message;
                    // 填入数据部分
                    IByteBuffer wrappedBuffer = Unpooled.WrappedBuffer(buffer);
                    // 发送数据
                    await context.WriteAndFlushAsync(wrappedBuffer);
                    //Debug.WriteLine($"发送消息到 装置：{address}: {message}");
                    string hexString = BitConverter.ToString(buffer);
                    //MonitoringEventBus.LogHandler($"地址：{address} 功能码：{functionCode} 数据：{hexString}", "103客户端发送消息");

                }
                catch (Exception ex)
                {
                    Debug.WriteLine(ex.ToString() );
                }
                
            }
            else
            {
                Debug.WriteLine($"未找到 装置 为 {address} 的连接");
            }
        }

        // 断开指定 IP 地址的连接
        public void DisconnectByIp(byte addr)
        {
            if (connections.TryGetValue(addr, out IChannelHandlerContext context))
            {
                context.CloseAsync(); // 关闭连接
                connections.Remove(addr); // 从字典中移除该连接
                Debug.WriteLine($"断开 地址 为 {addr} 的连接");
            }
            else
            {
                Debug.WriteLine($"未找到 地址 为 {addr} 的连接");
            }
        }
        
    }
}