c# - 调用 IdentityServer4 生成 System.NullReferenceException : Object reference not set to an instance of an object

我打算通过我的 web 项目通过 IdentityServer4 获得一个不记名 token ，但我收到了这个异常。
异常(exception)是在 IdentityServer4 开源类库中。字段 url 为空，这会导致 AddQueryString 方法中的 NullReference 异常，请参阅 https://github.com/IdentityServer/IdentityServer4/blob/master/src/Extensions/StringsExtensions.cs

日志文件显示；



所以在 AddQueryString 方法中，url 为空。
在我的网络客户端中，我的启动方法是；

public void Configuration(IAppBuilder app)
{
    app.UseCookieAuthentication(new CookieAuthenticationOptions
    {
        AuthenticationType = Settings.SignInAsAuthenticationType    // "Cookies";
    });

    app.UseOpenIdConnectAuthentication(openIdConnectOptions: new OpenIdConnectAuthenticationOptions
    {
        AuthenticationType = "oidc",
        Authority = Settings.AuthorityUrl,      //ID Server,  "https://localhost:44314/"; https://localhost:44307/
        ClientId = Settings.ClientId,           // "SIR"
        Scope = Settings.Scope,                 // "openid profile";
        ResponseType = Settings.ResponseType,   // "id_token code";
        SignInAsAuthenticationType = Settings.SignInAsAuthenticationType,
        //--------------------------------------// "Cookies";
        RedirectUri = Settings.RedirectUri,     // URL of website, http://localhost:53200/signin-oidc;
        RequireHttpsMetadata = Settings.RequireHttpsMetadata,
        //--------------------------------------// true
        ClientSecret = "secret"
    });

    app.Use(async (ctx, next) =>
    {
        var message = ctx.Authentication.User.Identity.IsAuthenticated
            ? $"User: {ctx.Authentication.User.Identity.Name}"
            : "User Not Authenticated";
        await next();
    });
}

请注意，我正在使用 Microsoft.Owin

我的 IdentityServer4 中的客户端是；

public static IEnumerable<Client> Clients()
{
    return new[]
    {
        new Client
        {
            ClientId = "SIR",
            ClientName = "SIR",
            AllowedGrantTypes = GrantTypes.Hybrid,
            AllowedScopes = new[]
            {
                IdentityServerConstants.StandardScopes.OpenId,
                IdentityServerConstants.StandardScopes.Profile
            },
            RedirectUris = {
                "https://localhost:44314",
                "http://localhost:53200/signin-oidc"
            },
            ClientSecrets = { new Secret("secret".Sha256())}
        }
    };
}

这是为什么，我该如何解决？

最佳答案

将 UserInteractionURL 添加到 AddIdentityServer。它会解决你的问题

 services.AddIdentityServer(options =>
                {
                    options.UserInteraction = new UserInteractionOptions()
                    {
                        LogoutUrl = "/Identity/account/logout",
                        LoginUrl = "/Identity/account/login",
                        LoginReturnUrlParameter = "returnUrl"
                    };
                })

关于c# - 调用 IdentityServer4 生成 System.NullReferenceException : Object reference not set to an instance of an object，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/53871066/