Question

我有一个自定义的ActionFilterAttribute，可以确保Session中的值与数据库中的值匹配。如果值不匹配，则会将用户重定向到AccountController上的Login操作。

public class CheckSessionAttribute : ActionFilterAttribute, IAuthenticationFilter
{
    public override void OnActionExecuting(ActionExecutingContext filterContext)
    {
        if (filterContext.ActionDescriptor.GetCustomAttributes(typeof(AllowAnonymousAttribute), false).Any())
        {
            // If the action allows Anonymous users, no need to check the session
            return;
        }

        var session = filterContext.RequestContext.HttpContext.Session;
        var userName = filterContext.RequestContext.HttpContext.User.Identity.Name;

        var userStore = new ApplicationUserStore(new IdentityDb());
        var userManager = new ApplicationUserManager(userStore);

        var user = userManager.FindByNameAsync(userName).Result;

        if (userName == null || user == null || session == null || session["ActiveSessionId"] == null || 
            session["ActiveSessionId"].ToString() != user.ActiveSessionId.ToString())
        {
            session.RemoveAll();
            session.Clear();
            session.Abandon();

            filterContext.Result = new RedirectToRouteResult(
                new RouteValueDictionary(new
                {
                    action = "Login",
                    controller = "Account"
                }
            ));         
        }

        base.OnActionExecuting(filterContext);
    }
}

[Authorize]
public class AccountController : Controller
{
    [AllowAnonymous]
    public ActionResult Login(string returnUrl)
    {
        SignOutAndKillSession();
        ViewBag.ReturnUrl = returnUrl;
        return View();
    }

    private void SignOutAndKillSession()
    {
        AuthenticationManager.SignOut();
        Session.RemoveAll();
        Session.Clear();
        Session.Abandon();
    }
}

当我在重定向到Login操作后尝试再次登录时，出现以下异常：

The provided anti-forgery token was meant for a different claims-based user than the current user

我在Login操作中设置了一个断点，并且可以看到在调用SignOutAndKillSession（）之前和之后，仍然将User.Identity.Name设置为正在注销的用户。我相信这是导致页面呈现时生成不正确的AntiForgeryToken的原因。

有人可以帮我找出如何在退出用户时清除用户主体吗？

由于

Answer 1

对于遇到此问题的任何人，我通过使CheckSessionAttribute中的MVC 5创建的cookie过期来解决它。我还将属性从ActionFilterAttribute更改为IAuthorizationFilter Attribute

public class CheckSessionAttribute : FilterAttribute, IAuthorizationFilter
{
    public void OnAuthorization(AuthorizationContext filterContext)
    {
        if (filterContext.ActionDescriptor.GetCustomAttributes(typeof(AllowAnonymousAttribute), false).Any())
        {
            // If the action allows Anonymous users, no need to check the session
            return;
        }

        var session = filterContext.RequestContext.HttpContext.Session;
        var userName = filterContext.RequestContext.HttpContext.User.Identity.Name;

        var userStore = new ApplicationUserStore(new IdentityDb());
        var userManager = new ApplicationUserManager(userStore);

        var user = userManager.FindByNameAsync(userName).Result;

        if (userName == null || user == null || session == null || session["ActiveSessionId"] == null ||
            session["ActiveSessionId"].ToString() != user.ActiveSessionId.ToString())
        {
            session.RemoveAll();
            session.Clear();
            session.Abandon();

            ExpireCookie("ASP.NET_SessionId", filterContext);
            ExpireCookie("__RequestVerificationToken", filterContext);
            ExpireCookie(".AspNet.ApplicationCookie", filterContext);

            filterContext.Result = new RedirectToRouteResult(
                new RouteValueDictionary(new
                {
                    action = "Login",
                    controller = "Account"
                }
            ));
        }

        return;
    }

    private void ExpireCookie(string name, AuthorizationContext filterContext)
    {
        if (filterContext.RequestContext.HttpContext.Request.Cookies[name] != null)
        {
            filterContext.RequestContext.HttpContext.Response.Cookies[name].Value = string.Empty;
            filterContext.RequestContext.HttpContext.Response.Cookies[name].Expires = DateTime.Now.AddMonths(-20);
        }
    }
}

使用自定义ActionFilterAttribute在MVC 5中注销用户

1 个答案: