使用依赖注入时 HttpContext Session 为空

Question

使用 OWIN 和 AutoFac 作为 IoC 容器，我尝试使用依赖注入将 HttpContext 注入到会话状态存储机制中，但 HttpContext.Session 为空。另外，我不确定这是否重要，但我尝试将 HttpContextWrapper(HttpContext.Current) 注入的类是我构建为 nuget 包的外部 dll。

Autofac 注册，注册我的 Autofac 模块

 public static void Register(IAppBuilder app)
    {
            var builder = new ContainerBuilder();
            builder.RegisterControllers(Assembly.GetExecutingAssembly());
            builder.RegisterModelBinderProvider();
            builder.RegisterFilterProvider();

            builder.RegisterModule(new GatewayModule());

            var container = builder.Build();
            DependencyResolver.SetResolver(new AutofacDependencyResolver(container));
            app.UseAutofacMiddleware(container);
    }

以及autofac模块的代码：

public class GatewayModule : Module
{
    protected override void Load(ContainerBuilder builder)
    {
        builder.RegisterType<SessionStateTokenStore>()
            .WithParameter(new TypedParameter(typeof(HttpContextBase), new HttpContextWrapper(HttpContext.Current)))
            .As<ITokenStore>().InstancePerRequest();
    }
}

但是，当我查看我的 SessionStateTokenStore 时，_httpContext.Session 为空。这是我的调试器中的监视窗口的图像。 HttpContext.Session is null

为什么 HttpContext.Session 为空，我该如何解决？

Answer 1

能否让 Autofac 解析 HttpContextBase，看看它解决了问题？

// HttpContext
builder.Register(c => new HttpContextWrapper(HttpContext.Current) as HttpContextBase)
   .As<HttpContextBase>().InstancePerLifetimeScope();
builder.Register(c => c.Resolve<HttpContextBase>().Request)
   .As<HttpRequestBase>().InstancePerLifetimeScope();
builder.Register(c => c.Resolve<HttpContextBase>().Response)
   .As<HttpResponseBase>().InstancePerLifetimeScope();
builder.Register(c => c.Resolve<HttpContextBase>().Server)
   .As<HttpServerUtilityBase>().InstancePerLifetimeScope();
builder.Register(c => c.Resolve<HttpContextBase>().Session)
   .As<HttpSessionStateBase>().InstancePerLifetimeScope();

builder.RegisterType<SessionStateTokenStore>()
   .As<ITokenStore>().InstancePerRequest();