c# - 序列包含多个元素 Microsoft.Owin.Security.AuthenticationManager

Question

尝试使用 Google 进行外部身份验证时，应用程序出现以下异常:

<Error> <Message>An error has occurred. <ExceptionMessage>Sequence contains more than one element</ExceptionMessage> <ExceptionType>System.InvalidOperationException</ExceptionType> <StackTrace> at System.Linq.Enumerable.SingleOrDefault[TSource](IEnumerable1 source) at Microsoft.Owin.Security.AuthenticationManager.<AuthenticateAsync>d__8.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at System.Runtime.CompilerServices.TaskAwaiter1.GetResult() at System.Web.Http.HostAuthenticationFilter.d__0.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at System.Runtime.CompilerServices.TaskAwaiter.GetResult() at System.Web.Http.Controllers.AuthenticationFilterResult.d__0.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult() at System.Web.Http.Dispatcher.HttpControllerDispatcher.d__1.MoveNext()

我已按如下方式配置我的 Web Api oAuth:

public void ConfigureOAuth(IAppBuilder app)
{
    app.UseExternalSignInCookie(
        Microsoft.AspNet.Identity.DefaultAuthenticationTypes.ExternalCookie);

    OAuthBearerOptions = new OAuthBearerAuthenticationOptions();

    OAuthAuthorizationServerOptions OAuthServerOptions = 
        new OAuthAuthorizationServerOptions()
    {
        AllowInsecureHttp = true,
        TokenEndpointPath = new PathString("/token"),
        AccessTokenExpireTimeSpan = TimeSpan.FromMinutes(30),
        Provider = new SimpleAuthorizationServerProvider(),
    };

    app.UseOAuthAuthorizationServer(OAuthServerOptions);

    app.UseOAuthBearerAuthentication(OAuthBearerOptions);

    googleAuthOptions = new GoogleOAuth2AuthenticationOptions()
    {
        ClientId = ClientId,
        ClientSecret = ClientSecret,
        Provider = new GoogleAuthProvider()
    };

    app.UseGoogleAuthentication(googleAuthOptions);
}

Answer 1

请检查，可能是您使用的 app.UseOAuthBearerTokens(OAuthOptions); 和 app.UseOAuthBearerAuthentication(new OAuthBearerAuthenticationOptions());一起