在ASP.NET Core 3.1中的动作过滤器中，会话始终为null

如何解决在ASP.NET Core 3.1中的动作过滤器中，会话始终为null

我试图在会话中设置一个值，然后想在动作过滤器中检索它，尝试通过actionContext访问，但仍获取空的会话值，无法弄清楚我在哪里做错了。在我的身份验证控制器中，我要在验证用户凭据后设置会话值。

public class AuthController : Controller {

 private IHttpContextAccessor httpContextAccessor { get; }

 public AuthController (IHttpContextAccessor contextAccessor)
    {
        httpContextAccessor = contextAccessor;
    }

private async Task<IActionResult> Login(signIn objDto){

          // Some Authenticate Code and token generation

          var claims = new[]
            {
                new Claim(ClaimTypes.NameIdentifier,user.Id.ToString()),new Claim(ClaimTypes.Name,user.Username)
            };

            var key = new SymmetricSecurityKey(Encoding.UTF8.GetBytes(_config.GetSection("Jwt:TokenSecretKey").Value));
            var creds = new SigningCredentials(key,SecurityAlgorithms.HmacSha512Signature);

            var tokenDescriptor = new SecurityTokenDescriptor
            {
                Subject = new ClaimsIdentity(claims),Expires = DateTime.Now.AddDays(1),SigningCredentials = creds
            };
            var tokenHandler = new JwtSecurityTokenHandler();
            var token = tokenHandler.WriteToken(tokenHandler.CreateToken(tokenDescriptor));

          httpContextAccessor.HttpContext.Session.SetString("token",token);

          //return Ok result with token
       }
}

但是在任何下一次调用中都无法通过onActionExecuting方法访问它。

public class WebAPIActionFilterHelper : ActionFilterAttribute
{
    private IHttpContextAccessor httpContextAccessor { get; }

    public WebAPIActionFilterHelper(IHttpContextAccessor contextAccessor)
    {
        httpContextAccessor = contextAccessor;
    }

    public override void OnActionExecuting(ActionExecutingContext actionContext)
    {
   
        if (actionContext.Controller.GetType().Name == "AuthController")
            return;
          // Always return null session
        var token = httpContextAccessor.HttpContext.Session.GetString("token");
        if (token == null){
        actionContext.Result = new UnauthorizedResult();}

        base.OnActionExecuting(actionContext);
    }
}

以下是我的启动课程

public class Startup
    {
        public IConfiguration Configuration { get; }
        public Startup(IConfiguration configuration)
        {
            Configuration = configuration;
        }

        // This method gets called by the runtime. Use this method to add services to the container.
        public void ConfigureServices(IServiceCollection services)
        {
            services.AddDbContext<DataContext>(x => x.UseSqlite(Configuration.GetConnectionString("DefaultConnection")));
            services.AddControllers(x => x.Filters.Add(typeof(WebAPIActionFilterHelper))).
                AddJsonOptions(o =>
              {
                  o.JsonSerializerOptions.MaxDepth = 999999999;
              });

            services.AddAutoMapper(typeof(Startup));
            services.AddCors();

            services.AddHttpContextAccessor();
            services.AddScoped<IAuthRepository,AuthRepository>();
            services.AddAuthorization();
            services.AddAuthentication(JwtBearerDefaults.AuthenticationScheme)
                .AddJwtBearer(opt =>
                {
                    opt.TokenValidationParameters = new TokenValidationParameters
                    {
                        ValidateLifetime = true,ValidateIssuerSigningKey = true,IssuerSigningKey = new SymmetricSecurityKey(Encoding.UTF8.GetBytes(Configuration.GetSection("Jwt:TokenSecretKey").Value)),ValidateIssuer = true,ValidateAudience = true,ValidIssuer = Configuration["Jwt:Issuer"],ValidAudience = Configuration["Jwt:Issuer"],};
                });
            services.AddDistributedMemoryCache();
            services.AddSession(opt =>
            {
                opt.IdleTimeout = TimeSpan.FromMinutes(10);
            });
        }

        // 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();
            }
            
            app.UseCors(x => x.AllowAnyOrigin().AllowAnyMethod().AllowAnyHeader());

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

            app.UseSession();
            app.UseEndpoints(endpoints =>
            {
                endpoints.MapControllers();
            });
        }
    }