我正在ASP.NET Identity cookie中存储自定义声明,例如用户的真实姓名,以避免在每个请求上进行不必要的数据库查询.至少这是我认为这个代码正在做的:
- var identity = await user.GenerateUserIdentityAsync(UserManager);
- identity.AddClaim(new Claim(ClaimTypes.GivenName,user.FirstName)));
- // etc.
- AuthenticationManager.SignIn(new AuthenticationProperties {IsPersistent=true},identity);
这工作正常,我可以通过以下方式检索这些声明:
- private static string GetClaim(string claimType)
- {
- var identity = (ClaimsPrincipal) Thread.CurrentPrincipal;
- var claim = identity.Claims.SingleOrDefault(o => o.Type == claimType);
- return claim == null ? null : claim.Value;
- }
identity.Claims属性包含以下声明,如预期的:
- http://schemas.xmlsoap.org/ws/2005/05/identity/claims/nameidentifier: ced2d16c-cb6c-4af0-ad5a-09df14dc8207
- http://schemas.xmlsoap.org/ws/2005/05/identity/claims/name: me@example.com
- http://schemas.microsoft.com/accesscontrolservice/2010/07/claims/identityprovider: ASP.NET Identity
- AspNet.Identity.SecurityStamp: 284c648c-9cc7-4321-b0ce-8a347cd5bcbf
- http://schemas.microsoft.com/ws/2008/06/identity/claims/role: Admin
- http://schemas.xmlsoap.org/ws/2005/05/identity/claims/givenname: My Name
麻烦的是,经过一段时间(通常是几个小时),我的自定义声明似乎消失了 – 在这个例子中,给定名称不再存在于枚举中.用户仍然通过身份验证,所有默认声明仍然存在.
发生了什么,怎么解决这个问题?我唯一可以想到的是,cookie正在过期,并在幕后重新发布,但我不知道为什么(或如果)会发生.
解决方法
是的,这个问题很可能是cookie过期了.由于您没有将自定义声明添加到数据库中的用户声明中,所以它们在刷新时丢失,因为您不会在调用的方法中添加声明.您可以通过以下方式添加声明:
- userManager.AddClaim(user.Id,new Claim(ClaimTypes.GivenName,user.FirstName));
或者您可以在重新生成cookie时调用的方法(默认情况下为user.GenerateUserIdentityAsync)将其移动.
- app.UseCookieAuthentication(new CookieAuthenticationOptions {
- AuthenticationType = DefaultAuthenticationTypes.ApplicationCookie,LoginPath = new PathString("/Account/Login"),Provider = new CookieAuthenticationProvider {
- // Enables the application to validate the security stamp when the user logs in.
- // This is a security feature which is used when you change a password or add an external login to your account.
- OnValidateIdentity = SecurityStampValidator.OnValidateIdentity<ApplicationUserManager,ApplicationUser>(
- validateInterval: TimeSpan.FromMinutes(30),regenerateIdentity: (manager,user) => user.GenerateUserIdentityAsync(manager))
- }
- });