asp.net – GetExternalLoginInfo在Google OWIN提供程序上返回’

Create > Project > Web > ASP.NET Web Application > OK > MVC,Individual User Accounts > OK

我正在尝试使用OWIN Google提供商登录并遇到问题.

OWIN配置方法如下所示：

app.UseCookieAuthentication(new CookieAuthenticationOptions
        {
            AuthenticationType = DefaultAuthenticationTypes.ApplicationCookie,LoginPath = new PathString("/Account/Login")
        });

        app.UseExternalSignInCookie(DefaultAuthenticationTypes.ExternalCookie);

        var google = new Microsoft.Owin.Security.Google.GoogleOAuth2AuthenticationOptions
        {
            ClientId = "xxxxx.apps.googleusercontent.com",ClientSecret = "xxxxxxxxx-yyyyyyyyy"
        };

        google.Scope.Add("profile");
        google.Scope.Add("email");

        app.UseGoogleAuthentication(google);

我点击网页上的Google提供商按钮,使用google进行身份验证,然后返回到ExternalLoginCallback.此时,该过程在此行中出现故障：

var loginInfo = await AuthenticationManager.GetExternalLoginInfoAsync();

loginInfo为null,它将我重定向回Login页面,没有任何可见错误.