identity server4 在接入时遇到错误：Exception: Correlation failed. Unknown location的解决方法

背景：前面尝试了用https的方式解决，但是需要有域名申请的证书，否则被他保护的api被别人调用时报错(没找到解决方法)

尝试：放弃https的方式，还用原来的http的方式，解决Correlation failed. Unknown location的问题，找到这个文章，asp.net core - OIDC correlation failed in Microsoft Teams authentication popup (no problems in browser) - Stack Overflow

用下面的代码搞定：

private void CheckSameSite(HttpContext httpContext, CookieOptions options)
{
    if (options.SameSite == SameSiteMode.None)
    {
        var userAgent = httpContext.Request.Headers["User-Agent"].ToString();
        // TODO: Use your User Agent library of choice here.
        if (/* UserAgent doesn’t support new behavior */)
        {
               // For .NET Core < 3.1 set SameSite = (SameSiteMode)(-1)
               options.SameSite = SameSiteMode.Unspecified;
         }
    }
}

public void ConfigureServices(IServiceCollection services)
{
    services.Configure<CookiePolicyOptions>(options =>
    {
        options.MinimumSameSitePolicy = SameSiteMode.Unspecified;
        options.OnAppendCookie = cookieContext => 
            CheckSameSite(cookieContext.Context, cookieContext.CookieOptions);
        options.OnDeleteCookie = cookieContext => 
            CheckSameSite(cookieContext.Context, cookieContext.CookieOptions);
    });
}

public void Configure(IApplicationBuilder app)
{
    app.UseCookiePolicy(); // Before UseAuthentication or anything else that writes cookies.
    app.UseAuthentication();
    // …
}

我的代码记录：

public class Startup
    {
        public static IContainer AutofacContainer;
        public Startup(IConfiguration configuration)
        {
            Configuration = configuration;
        }

        public IConfiguration Configuration { get; }
        private void CheckSameSite(HttpContext httpContext, CookieOptions options)
        {
            if (options.SameSite == Microsoft.AspNetCore.Http.SameSiteMode.None)
            {
                var userAgent = httpContext.Request.Headers["User-Agent"].ToString();
                // TODO: Use your User Agent library of choice here.
                //if (/* UserAgent doesn’t support new behavior */)
                //{
                // For .NET Core < 3.1 set SameSite = (SameSiteMode)(-1)
                options.SameSite = Microsoft.AspNetCore.Http.SameSiteMode.Lax;
                //}
            }
        }

        // This method gets called by the runtime. Use this method to add services to the container.
        public IServiceProvider ConfigureServices(IServiceCollection services)
        {
            services.AddControllersWithViews();
            services.AddMvc().AddRazorRuntimeCompilation();

            JwtSecurityTokenHandler.DefaultInboundClaimTypeMap.Clear();

            services.AddAuthentication(options =>
            {
                options.DefaultScheme = "Cookies";
                options.DefaultChallengeScheme = "oidc";
            })
            .AddCookie(options =>
            {
                options.Cookie.Name = "Cookies";
            })
            .AddOpenIdConnect("oidc", options =>
            {
                options.SignInScheme = "Cookies";
                options.Authority = "http://localhost:5000";
                options.RequireHttpsMetadata = false;
                options.ClientId = "localMvcCore";
                options.ClientSecret = "121212";
                options.ResponseType = "code id_token";
                options.Scope.Clear();
                options.Scope.Add("openid");
                options.Scope.Add("sid");
                options.Scope.Add("profile");
                options.Scope.Add("AuthorizationAPI");
                options.SaveTokens = true;
            });



            services.Configure<CookiePolicyOptions>(options =>
            {
                options.MinimumSameSitePolicy = Microsoft.AspNetCore.Http.SameSiteMode.Unspecified;
                options.OnAppendCookie = cookieContext =>
                    CheckSameSite(cookieContext.Context, cookieContext.CookieOptions);
                options.OnDeleteCookie = cookieContext =>
                    CheckSameSite(cookieContext.Context, cookieContext.CookieOptions);
            });

            ContainerBuilder builder = new ContainerBuilder();
            //将services中的服务填充到Autofac中.
            builder.Populate(services);
            //新模块组件注册
            builder.RegisterModule<DefaultModuleRegister>();
            //创建容器.
            AutofacContainer = builder.Build();
            //使用容器创建 AutofacServiceProvider 
            return new AutofacServiceProvider(AutofacContainer);
        }

        // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
        public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
        {
            if (env.IsDevelopment())
            {
                app.UseDeveloperExceptionPage();
            }
            else
            {
                app.UseExceptionHandler("/Home/Error");
                // The default HSTS value is 30 days. You may want to change this for production scenarios, see https://aka.ms/aspnetcore-hsts.
                app.UseHsts();
            }

            app.UseCookiePolicy();
            app.UseStaticFiles();

            app.UseRouting();

            app.UseAuthentication();
            app.UseAuthorization();

            app.UseEndpoints(endpoints =>
            {
                endpoints.MapControllerRoute(
                    name: "default",
                    pattern: "{controller=Home}/{action=Index}/{id?}");
            });
        }
    }