针对 CNIC 号码生成 session 并在 5 分钟不活动后过期并将用户重定向到主页

Question

I'm creating an ASP.NET Core MVC application and I want that on the Homepage the user will be required to enter his/her CNIC (Identity Card) number.

After that, he'll be able to navigate to any page on the application. But if he/she is idle for 5 minutes or more then after 5 minutes if he/she tries to perform any action means to try to go to any other page then he/she will be redirected to "Homepage" and is required to enter his/her CNIC number again.

How can I implement this functionality using Sessions in the an ASP.NET Core MVC application?

Thank you

Answer 1

Please allow me post a sample, it's just a sample but it worked for me.

Fisrtly, I have a controller home action which will store a session. In your scenario, you have to store the session according to what users entered.

public IActionResult Index()
        {
            var value = HttpContext.Session.GetString("Code");
            if (value == null) {
                HttpContext.Session.SetString("Code", "001");
            }
            return View();
        }

Then I created an action filter to intercept all the requests, the filter should check if the incoming request is direct to the home page and whether there's a session value. So the filter should look like this:

using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.Mvc.Filters;

namespace WebMvcNet3.Filters
{
    public class SessionFilter : IActionFilter
    {
        public void OnActionExecuting(ActionExecutingContext context)
        {
            var value = context.HttpContext.Session.GetString("Code");
            var path = context.HttpContext.Request.Path;
            if (value == null && path != "/Home/Index") {
                context.Result = new RedirectResult("~/Home/Index");
                context.Result.ExecuteResultAsync(context);
            }
        }

        public void OnActionExecuted(ActionExecutedContext context)
        {
            // Do something after the action executes.
        }
    }
}

Then register the filter in startup.cs, and pls don't forget to add app.UseSession(); in Configure method:

public void ConfigureServices(IServiceCollection services)
{
    services.AddSession(options => {
        //options.IdleTimeout = TimeSpan.FromMinutes(5);
        options.IdleTimeout = TimeSpan.FromSeconds(60);
    });
    services.AddControllersWithViews();
    services.AddScoped<SessionFilter>();
    services.AddControllers(config =>
    {
        config.Filters.Add<SessionFilter>();
    });
}