Asp.net core mvc 从Identity server 4重定向url的行为不符合预期，并且；无法将Newtonsoft.Json.Linq.JArray强制转换为Newtonsoft.Json.Linq.JToken“；错误

注意：解决重定向问题后，我遇到了另一个问题，该问题出现错误“无法将Newtonsoft.Json.Linq.JArray强制转换为Newtonsoft.Json.Linq.JToken”。因此，在我的回答中，我为两者提供了正确的解决方案

我有身份服务器项目和客户端项目，所有的工作都是在没有任何问题的情况下进行认证的，甚至重定向到正确的客户机URL，但是URL EX：“”给出了空白页。 注意：为Identity Server和客户端应用程序启用SSl

正如您在下面的屏幕截图中看到的那样，它正在验证用户。 My Identity server包含客户端的以下配置值

                // OpenID Connect hybrid flow and client credentials client (MVC)
            new Client
            {
                ClientId = "mvc",
                ClientName = "MVC Client",
                AllowedGrantTypes = GrantTypes.HybridAndClientCredentials,
                ClientSecrets =
                {
                    new Secret("secret".Sha256())
                },

                RedirectUris = { /*"http://localhost:5002/signin-oidc",*/"https://localhost:44309/signin-oidc" },
                PostLogoutRedirectUris = { /*"http://localhost:5002/signout-callback-oidc",*/"https://localhost:44309/signout-callback-oidc" },

                AllowedScopes = 
                {
                    IdentityServerConstants.StandardScopes.OpenId,
                    IdentityServerConstants.StandardScopes.Profile,
                    //"api1"
                },
                AllowOfflineAccess = true
            }

startup.cs如下所示

        public void ConfigureServices(IServiceCollection services)
    {
        services.AddMvc();

        // configure identity server with in-memory stores, keys, clients and scopes
        services.AddIdentityServer()
            .AddDeveloperSigningCredential()
            .AddInMemoryIdentityResources(Config.GetIdentityResources())
            .AddInMemoryApiResources(Config.GetApiResources())
            .AddInMemoryClients(Config.GetClients())
            .AddTestUsers(Config.GetUsers());

        services.AddAuthentication()
            //.AddGoogle("Google", options =>
            //{
            //    options.SignInScheme = IdentityServerConstants.ExternalCookieAuthenticationScheme;

            //    options.ClientId = "434483408261-55tc8n0cs4ff1fe21ea8df2o443v2iuc.apps.googleusercontent.com";
            //    options.ClientSecret = "3gcoTrEDPPJ0ukn_aYYT6PWo";
            //})
            .AddOpenIdConnect("oidc", "dataVail Login", options =>
            {
                options.SignInScheme = IdentityServerConstants.ExternalCookieAuthenticationScheme;

                options.SignOutScheme = IdentityServerConstants.SignoutScheme;

                options.Authority = "https://login.microsoftonline.com/d0e2ebcc-0961-45b2-afae-b9ed6728ead7";//"https://demo.identityserver.io/";
                options.ClientId = "f08cc131-72da-4831-b19d-e008024645e4";
                options.UseTokenLifetime = true;
                options.CallbackPath = "/signin-oidc";
                options.RequireHttpsMetadata = false;

                options.TokenValidationParameters = new TokenValidationParameters
                {
                    NameClaimType = "name",
                    RoleClaimType = "role"
                };
            });
    }

        public void Configure(IApplicationBuilder app, IHostingEnvironment env)
    {
        if (env.IsDevelopment())
        {
            app.UseDeveloperExceptionPage();
        }

        app.UseForwardedHeaders(new ForwardedHeadersOptions
        {
            ForwardedHeaders = ForwardedHeaders.XForwardedFor | ForwardedHeaders.XForwardedProto
        });

        app.Use(async (context, next) =>
        {
            context.Request.Scheme = "https";
            await next.Invoke();
        });
        app.UseIdentityServer();

        app.UseStaticFiles();
        app.UseMvcWithDefaultRoute();
    }

这是我的客户端应用程序的startup.cs

        public void ConfigureServices(IServiceCollection services)
    {
        services.AddMvc();

        JwtSecurityTokenHandler.DefaultInboundClaimTypeMap.Clear();

        services.AddAuthentication(options =>
        {
            options.DefaultScheme = "Cookies";
            options.DefaultChallengeScheme = "oidc";
        })
            .AddCookie("Cookies")
            .AddOpenIdConnect("oidc", options =>
            {
                options.SignInScheme = "Cookies";

                options.Authority = "https://localhost:44392/";
                options.RequireHttpsMetadata = false;

                options.ClientId = "mvc";
                options.ClientSecret = "secret";
                options.ResponseType = "code id_token";

                options.SaveTokens = true;
                options.GetClaimsFromUserInfoEndpoint = true;

                //options.Scope.Add("api1");
                options.Scope.Add("offline_access");

            });
    }

---

谁能帮我解决这个问题。

我可以在Identity Server 4的帮助下解决这个问题。 如果有人遇到这个问题，这里是解决办法

我没有在配置客户机MVC管道中添加“UseAuthentication”。所以在添加之后，我按照预期被重定向，然后我遇到了另一个问题，如下所示

System.InvalidCastException: Cannot cast Newtonsoft.Json.Linq.JArray to Newtonsoft.Json.Linq.JToken. at Microsoft.AspNetCore.Authentication.RemoteAuthenticationHandler1.d__12.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Runtime.CompilerServices.TaskAwaiter1.GetResult() at Microsoft.AspNetCore.Authentication.AuthenticationMiddleware.<Invoke>d__6.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddleware.<Invoke>d__7.MoveNext()

---

希望这可能会对某人有所帮助。

我在担任多个角色时也遇到同样的问题。以下是解决方案：

.AddOpenIdConnect("oidc", options =>
{
    // ...
    options.Scope.Add("roles");

    // ... using MapJsonKey instead of MapUniqueJsonKey for having 2 or more roles
    options.ClaimActions.MapJsonKey(claimType: "role", jsonKey: "role");
});

---

能否请您更具体地说明删除额外索赔的代码将插入何处？@Ilya如果您下载了IdentityServer 4示例，那么您应该在Quickstart.Account.AccountController.FindUserFromeExternalProvider（）方法中找到此代码片段的放置位置。

.AddOpenIdConnect("oidc", options =>
{
    // ...
    options.Scope.Add("roles");

    // ... using MapJsonKey instead of MapUniqueJsonKey for having 2 or more roles
    options.ClaimActions.MapJsonKey(claimType: "role", jsonKey: "role");
});