谷歌 aspnet mvc5 上的 AuthenticationManager.GetExternalLoginInfoAsync() 返回 null [重复]

我使用默认的 Visual Studio 2015 模板和 Google 身份验证开发了 ASPNET MVC 5 应用程序。在开发环境中一切正常，但在外部身份验证后的实际调用中AuthenticationManager.GetExternalLoginInfoAsync()有时返回 null。

通常它会在一天的中心时间（从 08:00 到 20:00）返回 null，但我还没有找到模式，因为有时在那个时间有效。我查看了开发人员控制台，但没有太多请求（过去 12 小时内有 22 个），并且全部成功。

我尝试了其他 StackOverflow 线程的一些解决方案，但它们不起作用。另外，我只能在晚上尝试它们，因为这是一个个人项目，然后连接成功，我无法重现该问题。

代码是标准的：

• 启动时

  public void ConfigureAuth(IAppBuilder app)
  {
      // Configure the db context, user manager and signin manager to use a single instance per request
      app.CreatePerOwinContext(ApplicationDbContext.Create);
      app.CreatePerOwinContext<ApplicationUserManager>(ApplicationUserManager.Create);
      app.CreatePerOwinContext<ApplicationSignInManager>(ApplicationSignInManager.Create);
  
      // Enable the application to use a cookie to store information for the signed in user
      // and to use a cookie to temporarily store information about a user logging in with a third party login provider
      // Configure the sign in cookie
      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))
          }
      });            
      app.UseExternalSignInCookie(DefaultAuthenticationTypes.ExternalCookie);
  
      // Enables the application to temporarily store user information when they are verifying the second factor in the two-factor authentication process.
      app.UseTwoFactorSignInCookie(DefaultAuthenticationTypes.TwoFactorCookie, TimeSpan.FromMinutes(5));
  
      // Enables the application to remember the second login verification factor such as phone or email.
      // Once you check this option, your second step of verification during the login process will be remembered on the device where you logged in from.
      // This is similar to the RememberMe option when you log in.
      app.UseTwoFactorRememberBrowserCookie(DefaultAuthenticationTypes.TwoFactorRememberBrowserCookie);
  
      var google = new GoogleOAuth2AuthenticationOptions()
      {
          ClientId = "xxxx",
          ClientSecret = "xxxx",
          Provider = new GoogleOAuth2AuthenticationProvider()
      };
      google.Scope.Add("email");
      app.UseGoogleAuthentication(google);
  }
  

• 在外部登录回调上

  //
  // GET: /Account/ExternalLoginCallback
  [AllowAnonymous]
  public async Task<ActionResult> ExternalLoginCallback(string returnUrl)
  {
      Log.Debug("AuthenticationManager.GetExternalLoginInfoAsync()");
      var loginInfo = await AuthenticationManager.GetExternalLoginInfoAsync();
      if (loginInfo == null)
      {
          Log.Error("AuthenticationManager.GetExternalLoginInfoAsync(): null");
          return RedirectToAction("Login");
      }
  ...
  

更多信息
我已经与另一个用户创建了新的 Google 凭据，当我更改 clientId 和 clientSecret 时，它会再次工作......我什至不知道什么时候......

还有更多信息
问题不在于凭据，我“只”需要重新启动 ASP.NET 应用程序来解决问题，也许这个新线索可以帮助别人帮助我。

未复制
我已经发布了答案，但答案不在其中OWIN 的 GetExternalLoginInfoAsync 始终返回 null帖子中，我提到了我找到解决方案的线程：ASP.NET_SessionId + OWIN Cookie 不发送到浏览器

最后（我认为）一周后我找到了解决方案，没有登录失败。这一切都归功于这个 StackOverflow 线程。我的解决方案是以下行插入AccountController.ExternalLogin action:

Session["Workaround"] = 0;

在上面的线程（以及那里提供的链接）中，找到了混合 ASPNET MVC 和 OWIN 组件的会话和 cookie 时出现的错误的更好解释。

完整控制器服务代码：

    //
    // POST: /Account/ExternalLogin
    [HttpPost]
    [AllowAnonymous]
    [ValidateAntiForgeryToken]
    public ActionResult ExternalLogin(string provider, string returnUrl)
    {
        // https://stackoverflow.com/questions/20737578/asp-net-sessionid-owin-cookies-do-not-send-to-browser
        Session["Workaround"] = 0;
        // Request a redirect to the external login provider
        return new ChallengeResult(provider, Url.Action("ExternalLoginCallback", "Account", new { ReturnUrl = returnUrl }));
    }