Question

我在我的网站中通过ASP身份框架使用Google和Facebook身份验证，两个提供商的外部登录在某些时候运行良好但有时它没有，我无法理解问题的来源但是当我重新启动App时，它工作正常。

System.NullReferenceException：未将对象引用设置为对象的实例。在Microsoft.AspNet.Identity.Owin.SignInManager`2.d__1d.MoveNext(） ---从抛出异常的先前位置开始的堆栈跟踪结束--- 在System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess（任务任务）在System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification（任务任务）在SweetNightsIn.Identity.SiteUserManager.d__14.MoveNext（） ---从抛出异常的先前位置开始的堆栈跟踪结束--- 在System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess（任务任务）在System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification（任务任务）在SweetNightsIn.Web.Controllers.AccountController.d__3.MoveNext（）

OWIN startup.cs看起来像这样，

// For more information on how to configure your application, visit http://go.microsoft.com/fwlink/?LinkID=316888
        app.CreatePerOwinContext(IdentityDbContext.Create);
        app.CreatePerOwinContext<ApplicationUserManager>(ApplicationUserManager.Create);
        app.CreatePerOwinContext<ApplicationSignInManager>(ApplicationSignInManager.Create);

        app.UseCookieAuthentication(new CookieAuthenticationOptions
        {
            AuthenticationType = DefaultAuthenticationTypes.ApplicationCookie,
            LoginPath = new PathString(AppConstants.LoginPath)

        });

        app.UseExternalSignInCookie(DefaultAuthenticationTypes.ExternalCookie);

        FacebookAuthenticationOptions facebookOptions = new FacebookAuthenticationOptions()
        {
            AppId = ConfigurationManager.AppSettings["FacebookAppId"],
            AppSecret = ConfigurationManager.AppSettings["FacebookAppSecret"],
            UserInformationEndpoint = "https://graph.facebook.com/v2.8/me?fields=id,name,email",
            BackchannelHttpHandler = new FacebookBackChannelHandler()
        };

        facebookOptions.Scope.Add("email");

        app.UseFacebookAuthentication(facebookOptions);

        app.UseGoogleAuthentication(new GoogleOAuth2AuthenticationOptions()
        {
            ClientId = ConfigurationManager.AppSettings["GoogleAppId"],
            ClientSecret = ConfigurationManager.AppSettings["GoogleAppSecret"],
            Caption = "Google +"
        });

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Answer 1

此特定错误是由于Facebook API更改，主要更改涉及API升级为JSON格式的响应

外部身份验证失败ASP身份OWIN中间件

1 个答案: