asp.net-core - AddJwtBearer OnAuthenticationFailed 返回自定义错误

Question

我正在使用 Openidict .
我正在尝试使用自定义状态代码返回自定义消息，但我无法做到。我在 startup.cs 中的配置:

services.AddAuthentication(options =>
            {
                options.DefaultAuthenticateScheme = JwtBearerDefaults.AuthenticationScheme;
                options.DefaultChallengeScheme = JwtBearerDefaults.AuthenticationScheme;
            })
            .AddJwtBearer(o =>
            {
                o.Authority = this.Configuration["Authentication:OpenIddict:Authority"];
                o.Audience = "MyApp";           //Also in Auhorization.cs controller.
                o.RequireHttpsMetadata = !this.Environment.IsDevelopment();
                o.Events = new JwtBearerEvents()
                {
                    OnAuthenticationFailed = context =>
                    {
                        context.Response.StatusCode = HttpStatusCodes.AuthenticationFailed;
                        context.Response.ContentType = "application/json";
                        var err = this.Environment.IsDevelopment() ? context.Exception.ToString() : "An error occurred processing your authentication.";
                        var result = JsonConvert.SerializeObject(new {err});
                        return context.Response.WriteAsync(result);
                    }
                };
            });

但问题是没有返回任何内容。 Chrome 开发者工具报告

(failed)

状态和

Failed to load response data

为回应。

我也试过:

context.Response.WriteAsync(result).Wait();
return Task.CompletedTask;

但结果是一样的。

期望的行为:
我想返回带有错误消息的自定义状态代码。

Answer 1

面临同样的问题，尝试了 Pinpoint 提供的解决方案，但它在 ASP.NET core 2.0 上对我不起作用。但是基于 Pinpoint 的解决方案和一些反复试验，以下代码对我有用。

var builder = services.AddAuthentication(options =>
        {
            options.DefaultAuthenticateScheme = JwtBearerDefaults.AuthenticationScheme;
            options.DefaultChallengeScheme = JwtBearerDefaults.AuthenticationScheme;
        }).AddJwtBearer(o =>
        {
            o.Authority = "http://192.168.0.110/auth/realms/demo";
            o.Audience = "demo-app";
            o.RequireHttpsMetadata = false;

            o.Events = new JwtBearerEvents()
            {
                OnAuthenticationFailed = c =>
                {
                    c.NoResult();
                    c.Response.StatusCode = 500;
                    c.Response.ContentType = "text/plain";
                    c.Response.WriteAsync(c.Exception.ToString()).Wait();
                    return Task.CompletedTask;
                },
                OnChallenge = c =>
                {
                    c.HandleResponse();
                    return Task.CompletedTask;
                }
            };
        });