ปรึกษาการเก็บค่าไว้ในตัวแปร หรือโมเดลที่ไม่ถูกเคลียร์ทิ้ง

        public void ConfigureServices(IServiceCollection services)
        {
            //In-Memory
            //services.AddDistributedMemoryCache();
            services.AddSession(options =>
            {
                options.IdleTimeout = TimeSpan.FromMinutes(90);

            });

        public void Configure(IApplicationBuilder app, IHostingEnvironment env)
        {
            if (env.IsDevelopment())
            {
                app.UseDeveloperExceptionPage();
            }
            else
            {
                app.UseExceptionHandler("/Home/Error");
                // The default HSTS value is 30 days. You may want to change this for production scenarios, see https://aka.ms/aspnetcore-hsts.
                app.UseHsts();
            }
            app.UseStaticFiles();
            app.UseCookiePolicy();
            app.UseSession();

        public IActionResult Index()
        {
           HttpContext.Session.SetString("isLogin", "false");
            if (!IsLogin() || !User.Identity.IsAuthenticated)
            {                
                return RedirectToAction("Login"); //Fixed url not change. http://localhost:6969/Account/Login
            }
            return View();
        }

return View();

        private bool IsLogin()
        {
            bool result = false;
            if (HttpContext.Session.GetString("isLogin") != null)
            {
                if (HttpContext.Session.GetString("isLogin") == "true")
                {
                    result = true;
                }
            }
            return result;
        }

    @RenderSection("Scripts", required: false)
</body>
</html>

//node version : 10.15.3
const mqtt = require('mqtt'); //Hacks It's
const os = require('os');
const fs = require('fs-extra');


const file = 'logfile.txt'; //root path (NodeJS/logfile.txt)
const Fileoptions = { flag: 'a' };

const options = {
    port: 6969,
    host: 'mqtt://123.456.789.0',
    clientId: 'mqttjs_' + Math.random().toString(16).substr(2, 8),
    username: 'mymqtt',
    password: 'mqttwise',
    keepalive: 60,
    reconnectPeriod: 1000,
    protocolId: 'MQIsdp',
    protocolVersion: 5,
    clean: true,
    encoding: 'utf8'
};

const client = mqtt.connect('mqtt://123.456.789.0'', options);
client.on('connect', function () { // When connected
    // subscribe to a topic
    client.subscribe('wise/data', function () {
        // when a message arrives, do something with it
        client.on('message', function (topic, message, packet) {
            console.log("Received '" + message + "' on '" + topic + "'");
            writeToFile(message);
        });
    });
});

async function writeToFile(text) {
    await fs.outputFile(file, `${text}${os.EOL}`, Fileoptions);
}