Asp.Net Mvc 无法注销

Question

这是我的登录代码

 var expire = DateTime.Now.AddDays(7);
        // Create a new ticket used for authentication
        var ticket = new FormsAuthenticationTicket(
        1, // Ticket version
        username, // Username to be associated with this ticket
        DateTime.Now, // Date/time issued
        expire, // Date/time to expire
        true, // "true" for a persistent user cookie (could be a checkbox on form)
        roles, // User-data (the roles from this user record in our database)
        FormsAuthentication.FormsCookiePath); // Path cookie is valid for

        // Hash the cookie for transport over the wire
        var hash = FormsAuthentication.Encrypt(ticket);
        var cookie = new HttpCookie(FormsAuthentication.FormsCookieName, hash) { Expires = expire };

        // Add the cookie to the list for outbound response
        Response.Cookies.Add(cookie);

---

这是我的检查角色的代码。 这是一个自定义的 IHTTP 模块

 if (HttpContext.Current.User == null) return;
        if (!HttpContext.Current.User.Identity.IsAuthenticated) return;
        if (!(HttpContext.Current.User.Identity is FormsIdentity)) return;

        // Get Forms Identity From Current User
        var id = (FormsIdentity)HttpContext.Current.User.Identity;
        // Get Forms Ticket From Identity object
        var ticket = id.Ticket;
        // Retrieve stored user-data (our roles from db)
        var userData = ticket.UserData;
        var roles = userData.Split(',');
        // Create a new Generic Principal Instance and assign to Current User
        Thread.CurrentPrincipal = HttpContext.Current.User = new GenericPrincipal(id, roles);

---

这是我的注销代码

FormsAuthentication.SignOut();
        Response.Cookies.Remove(FormsAuthentication.FormsCookieName);
        Session.Clear(); 
        Response.Cache.SetCacheability(HttpCacheability.NoCache);
        Response.Cache.SetExpires(DateTime.Now.AddSeconds(-1));
        Response.Cache.SetNoStore();
        Response.AppendHeader("Pragma", "no-cache");
        return View("SignIn");

---

这太疯狂了。 我现在有两个秃头。

Answer 1

1）您不应该调用 Response.Cookies.Remove(FormsAuthentication.FormsCookieName); 是 Response.Cookies.Remove(无论用户名是什么);？

2) 尝试将过期的 cookie 发送回浏览器。

FormsAuthentication.SignOut();

// replace with username if this is the wrong cookie name
Response.Cookies.Remove(FormsAuthentication.FormsCookieName);
Session.Clear(); 
Response.Cache.SetCacheability(HttpCacheability.NoCache);
Response.Cache.SetExpires(DateTime.Now.AddSeconds(-1));
Response.Cache.SetNoStore();
Response.AppendHeader("Pragma", "no-cache");

// send an expired cookie back to the browser
var ticketExpiration    = DateTime.Now.AddDays(-7);
var ticket              = new FormsAuthenticationTicket(
    1, 
    // replace with username if this is the wrong cookie name
    FormsAuthentication.FormsCookieName, 
    DateTime.Now, 
    ticketExpiration, 
    false, 
    String.Empty);
var cookie              = new System.Web.HttpCookie("user")
{
    Expires             = ticketExpiration,
    Value               = FormsAuthentication.Encrypt(ticket),
    HttpOnly            = true
};

Response.Cookies.Add(cookie);

return View("SignIn");

Answer 2

您不能直接删除客户端计算机上的 cookie。 当您调用 Cookies.Remove 方法时，cookie 将在服务器端被删除。 要删除客户端的 cookie，需要将 cookie 的到期日期设置为过去的日期。

HttpCookie cookie = HttpContext.Current.Request.Cookies[FormsAuthentication.FormsCookieName];
if (cookie != null)
{
     cookie.Expires = DateTime.Now.AddDays(-1);
     HttpContext.Current.Response.Cookies.Add(cookie);
}

我希望这可以帮助你。

Answer 3

如果您想在所有页面上应用“浏览器背面无缓存”行为，那么您应该将其放入 global.asax 中。

protected void Application_BeginRequest()
{
    Response.Cache.SetCacheability(HttpCacheability.NoCache);
    Response.Cache.SetExpires(DateTime.UtcNow.AddHours(-1));
    Response.Cache.SetNoStore();
}

希望它对某人有帮助！