c# - 如何从 Global.asax 获取 OwinContext？

Question

我正在尝试设置我的依赖注入(inject)，我需要将 IAuthenticationManager 从 ASP.NET Identity 注入(inject)到 OwinContext。

为此，我从我的 Global.asax -> ServiceConfig.Configure() 运行:

 container.Register(() => HttpContext.Current.GetOwinContext().Authentication);

但是当我运行我的应用程序时，我收到这条消息:

No owin.Environment item was found in the context

为什么这个 HttpContext.Current.GetOwinContext() 在 Global.asax 中不可用？

Startup.cs

[assembly: OwinStartupAttribute(typeof(MyApp.Web.Startup))]
namespace Speedop.Web
{
    public partial class Startup
    {
        public void Configuration(IAppBuilder app)
        {
            ConfigureAuth(app);
        }
    }
}

Startup.Auth.cs

public partial class Startup
{
    public void ConfigureAuth(IAppBuilder app)
    {
        app.UseCookieAuthentication(new CookieAuthenticationOptions
        {
            AuthenticationType = DefaultAuthenticationTypes.ApplicationCookie,
            LoginPath = new PathString("/Account/Login"),
            Provider = new CookieAuthenticationProvider
            {
                OnValidateIdentity = SecurityStampValidator.OnValidateIdentity<UserManager<User, int>, User, int>(
                    validateInterval: TimeSpan.FromMinutes(30),
                    regenerateIdentityCallback: (manager, user) => manager.CreateIdentityAsync(user, DefaultAuthenticationTypes.ApplicationCookie),
                    getUserIdCallback: (id) => (Int32.Parse(id.GetUserId()))
                    )
            }
        });

        app.UseExternalSignInCookie(DefaultAuthenticationTypes.ExternalCookie);
    }
}

Answer 1

我用以下方法解决了这个问题:

container.RegisterPerWebRequest(() =>
{
    if (HttpContext.Current != null && HttpContext.Current.Items["owin.Environment"] == null && container.IsVerifying())
    {
        return new OwinContext().Authentication;
    }
    return HttpContext.Current.GetOwinContext().Authentication;

});

似乎 OwnContext 在启动时不存在，所以我会等待它并在它存在时注入(inject)它。请注意 container.IsVerifying() 存在于 SimpleInjector.Advanced

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