IHttpContextAccessor.HttpContext.User.Identity显示CurrentUserService服务中的所有空属性

Question

我正在尝试使用Jason Taylor's Clean Architecture Template，此模板使用NSwag自动创建TypeScript客户端（角度），但是我不需要创建TS客户端，因此我的主要目标是将其替换为Razor Pages。我已经能够做到这一点，但是CurrentUserService实例化时遇到麻烦，应该在此行中设置UserId：

UserId = httpContextAccessor.HttpContext?.User?.FindFirstValue(ClaimTypes.NameIdentifier);

这是完整的CurrentUserService：

using CleanREC0.Application.Common.Interfaces;
using Microsoft.AspNetCore.Http;
using System.Security.Claims;

namespace CleanREC0.WebUI.Services
{
    public class CurrentUserService : ICurrentUserService
    {
        public CurrentUserService(IHttpContextAccessor httpContextAccessor)
        {
            UserId = httpContextAccessor.HttpContext?.User?.FindFirstValue(ClaimTypes.NameIdentifier);
        }

        public string UserId { get; }
    }
}

第一次使用HttpContext都是null，这很好，因为一切都已初始化，但是随后的调用总是在所有[[httpContextAccessor.HttpContext.User.Identity属性上返回null，用户显示Identity正常，但即使用户正确登录，其所有属性和声明均为null或未获得任何结果。

以下是我对模板所做的操作的列表：

摆脱了
• NSwag

和所有与[[TypeScript相关的事物摆脱IdentityServer

已替换IdentityDbContext的

ApiAuthorizationDbContext

这是我的StartUp课程：

public class Startup
    {
        public Startup(IConfiguration configuration, IWebHostEnvironment environment)
        {
            Configuration = configuration;
            Environment = environment;
        }

        public IConfiguration Configuration { get; }
        public IWebHostEnvironment Environment { get; }

        public void ConfigureServices(IServiceCollection services)
        {
            services.AddApplication();
            services.AddInfrastructure(Configuration, Environment);    

            services.AddScoped<ICurrentUserService, CurrentUserService>();

            services.AddHttpContextAccessor();
            services.TryAddSingleton<IHttpContextAccessor, HttpContextAccessor>(); //I have added this line on as suggested on other post, but made no difference.


            services.AddHealthChecks()
                .AddDbContextCheck<ApplicationDbContext>();

            services.AddRazorPages()
                .AddFluentValidation(fv => fv.RegisterValidatorsFromAssemblyContaining<IApplicationDbContext>());
        }

        public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
        {
            if (env.IsDevelopment())
            {
                app.UseDeveloperExceptionPage();
                app.UseDatabaseErrorPage();
            }
            else
            {
                app.UseExceptionHandler("/Error");
                app.UseHsts();
            }

            app.UseCustomExceptionHandler();
            app.UseHealthChecks("/health");
            app.UseHttpsRedirection();
            app.UseStaticFiles();

            app.UseRouting();

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

            app.UseEndpoints(endpoints =>
            {
                endpoints.MapRazorPages();
            });
        }
    }

这是从

ConfigureServices

调用的

AddApplication

：

public static IServiceCollection AddApplication(this IServiceCollection services)
        {
            services.AddAutoMapper(Assembly.GetExecutingAssembly());
            services.AddMediatR(Assembly.GetExecutingAssembly());
            services.AddTransient(typeof(IPipelineBehavior<,>), typeof(RequestPerformanceBehaviour<,>));
            services.AddTransient(typeof(IPipelineBehavior<,>), typeof(RequestValidationBehavior<,>));

            return services;
        }

还有

AddInfrastructure

也在那里被称为：

public static IServiceCollection AddInfrastructure(this IServiceCollection services, IConfiguration configuration, IWebHostEnvironment environment)
        {
            services.AddDbContext<ApplicationDbContext>(options =>
                options.UseSqlServer(
                    configuration.GetConnectionString("DefaultConnection"), 
                    b => b.MigrationsAssembly(typeof(ApplicationDbContext).Assembly.FullName)));

            services.AddScoped<IApplicationDbContext>(provider => provider.GetService<ApplicationDbContext>());

            services.AddDefaultIdentity<ApplicationUser>()
                .AddEntityFrameworkStores<ApplicationDbContext>();

            if (environment.IsEnvironment("Test"))
            {

            }
            else
            {
                services.AddTransient<IDateTime, DateTimeService>();
                services.AddTransient<IIdentityService, IdentityService>();
                services.AddTransient<ICsvFileBuilder, CsvFileBuilder>();
            }

            services.AddAuthentication();

            return services;
        }

其他一切似乎都正常。在

Razor Page

级别，

User

变量及其Identity包含所有预期的信息和声明。我确定我缺少什么，有人可以指出正确的方向吗？

Answer 1

该链接指向解释此问题的答案：

在ASP.NET MVC框架下，HttpContext（因此控制器类为时未设置HttpContext.Session）如您所料，它被构造，但是后来它被设置（“注入”）ControllerBuilder类。

我正在使用的模板随附的

CurrentUserService类尝试读取构造函数中的用户声明，因此我将代码移至该属性的getter，该方法执行到该属性实际被使用时为止。那么所有的声明和属性都会被填充。

我的新CurrentUserService看起来像这样：

using CleanREC0.Application.Common.Interfaces;
using Microsoft.AspNetCore.Http;
using System.Security.Claims;

namespace CleanREC0.WebUI.Services
{
    public class CurrentUserService : ICurrentUserService
    {
        private IHttpContextAccessor _httpContextAccessor;

        public CurrentUserService(IHttpContextAccessor httpContextAccessor)
        {
            _httpContextAccessor = httpContextAccessor;
        }

        public string UserId { get { return _httpContextAccessor.HttpContext?.User?.FindFirstValue(ClaimTypes.NameIdentifier); }}
    }
}