.Net6 控制台服务端 MQTTnet(3.1.1)

安装个MQTTnet 3.1.1,然后开干

不废话了,直接贴代码

public class Program
{
    public static IMqttServer mqttServer;
    static void Main(string[] args)
    {
        StartServer();
        while (true)
        {
            var inputString = Console.ReadLine().ToLower().Trim(); 
            if (inputString == "exit")
            {
                mqttServer?.StopAsync();
                Console.WriteLine("MQTT服务已停止！"); break;
            }
            else if (inputString == "clients")
            {
                Console.ForegroundColor = ConsoleColor.White;
                foreach (var item in mqttServer.GetClientStatusAsync().Result)
                {
                    Console.WriteLine($"客户端标识：{item.ClientId}，协议版本：{item.ProtocolVersion}");
                }
                Console.WriteLine($"在线客户端数量: {mqttServer.GetClientStatusAsync().Result.Count}");
            }
            else
            {
                Console.WriteLine($"命令[{inputString}]无效！");
            }
        }
    }

    //启动Mqtt服务器
    private static async void StartServer()
    {
        try
        {
            //验证客户端信息
            var options = new MqttServerOptions
            {
                //连接验证
                ConnectionValidator = new MqttServerConnectionValidatorDelegate(p =>
                {
                    if (p.Username.ToLower() != "admin" || p.Password.ToLower() != "admin")
                    {
                        p.ReasonCode = MqttConnectReasonCode.BadUserNameOrPassword;
                     }
                 })
                };

            //设置端口号
            options.DefaultEndpointOptions.Port = 1883;
            options.DefaultEndpointOptions.ConnectionBacklog = 150;

            //创建Mqtt服务器
            mqttServer = new MqttFactory().CreateMqttServer();

            //订阅事件
            mqttServer.ClientSubscribedTopicHandler = new MqttServerClientSubscribedTopicHandlerDelegate(MqttServer_SubscribedTopic);

            //取消订阅事件
            mqttServer.ClientUnsubscribedTopicHandler = new MqttServerClientUnsubscribedTopicHandlerDelegate(MqttServer_UnSubscribedTopic);

            //客户端消息事件
            mqttServer.UseApplicationMessageReceivedHandler(MqttServer_ApplicationMessageReceived);

            //客户端连接事件
            mqttServer.UseClientConnectedHandler(MqttServer_ClientConnected);

            //客户端断开事件
            mqttServer.UseClientDisconnectedHandler(MqttServer_ClientDisConnected);

            //启动服务器
            await mqttServer.StartAsync(options);
        }
        catch (Exception e)
        {
            Console.Write($"服务器启动失败 Msg：{e.Message}");
        }

    }

    /// <summary>
    /// 客户订阅
    /// </summary>
    private static void MqttServer_SubscribedTopic(MqttServerClientSubscribedTopicEventArgs e)
    {
        //客户端Id
        var ClientId = e.ClientId;
        var Topic = e.TopicFilter.Topic;
        Console.ForegroundColor = ConsoleColor.DarkGreen;
        Console.WriteLine($"客户端[{ClientId}]已订阅主题：{Topic}");
    }

    /// <summary>
    /// 客户取消订阅
    /// </summary>
    private static void MqttServer_UnSubscribedTopic(MqttServerClientUnsubscribedTopicEventArgs e)
    {
        //客户端Id
        var ClientId = e.ClientId;
        var Topic = e.TopicFilter;
        Console.ForegroundColor = ConsoleColor.Magenta;
        Console.WriteLine($"客户端[{ClientId}]已取消订阅主题：{Topic}");
    }

    /// <summary>
    /// 接收消息
    /// </summary>
    private static void MqttServer_ApplicationMessageReceived(MqttApplicationMessageReceivedEventArgs e)
    {
        if (e.ApplicationMessage.Topic.Equals("topic01"))
        {
            try
            {
                string payload = Encoding.UTF8.GetString(e.ApplicationMessage.Payload);

                // 然后就处理信息就好了 payload
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.Message);
            }
        }
    }

    /// <summary>
    /// 客户连接
    /// </summary>
    private static void MqttServer_ClientConnected(MqttServerClientConnectedEventArgs e)
    {
        var ClientId = e.ClientId;
        Console.ForegroundColor = ConsoleColor.Yellow;
        Console.WriteLine($"客户端[{ClientId}]已连接");
    }

    /// <summary>
    /// 客户连接断开
    /// </summary>
    private static void MqttServer_ClientDisConnected(MqttServerClientDisconnectedEventArgs e)
    {
        var ClientId = e.ClientId;
        Console.ForegroundColor = ConsoleColor.Red;
        Console.WriteLine($"客户端[{ClientId}]已断开连接");
    }
}