老程序员跪求 Autofac与ASP.NET Areas工程问题

最近有个ASP.NET项目，工程类型为ASP.NET + MVC + WebApi2.2 + OWIN，希望引入Autofac这个Ioc框架。网上查了两三天，无解。现求助于各位高手。

相关代码见后。问题描述：

问题1：
当”备注2“代码使能语句

 var config = new HttpConfiguration();   

时，Areas中的AbcController构造参数可通过Atutofac注入，但HomeAreaRegistration中的路由设置失效。即，对于AbcController，只能通过链接
http://localhost:1607/api/abc/gettest访问，而不是http://localhost:1607/api/home/abc/gettest。

当把备注1代码切换成
var config = GlobalConfiguration.Configuration;
时，AbcController构造参数也可通过Atutofac注入，但HomeAreaRegistration中的路由设置有效，即只能通过http://localhost:1607/api/home/abc/gettest访问。但是，不能通过http://localhost:1607/Account/Login链接访问继承至Controller的AccountController（备注0）的Login方法——而先前的方式是正常的。

概括起来，HttpConfiguration不管是通过new HttpConfiguration新建一个，还是使用GlobalConfiguration.Configuration这个全局，都有各自问题。

问题2：
只要启用了Autofac，在ApiController中，HttpContext.Current.Session恒为null（注意，我已在Global文件中覆写了Init方法）。

以上，何解？
都说Autofac名气大，但不管国内还是国外的相关示例代码，没有一个是Areas工程的，到底支不支持Areas，真是郁闷。


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相关代码：

web.config代码片段：

<system.web>

    <authentication mode="Forms">

//****备注0

      <forms loginUrl="~/Account/Login" timeout="2880" slidingExpiration="true" name=".STSASPAUTH" />

      <!--<forms loginUrl="~/Home/Account2/Login" timeout="2880" slidingExpiration="true" name=".STSASPAUTH" />-->

    </authentication>

    <authorization>

      <deny users="?" />

    </authorization>

    <compilation debug="true" targetFramework="4.5.2" />

    <httpRuntime targetFramework="4.5.2" />

  </system.web>

Global.asax.cs:

   public class MvcApplication : System.Web.HttpApplication

    {



        protected void Application_Start()

        { 

            AreaRegistration.RegisterAllAreas();

            // eliminate this line code to let OWIN manage WebApi.

            //GlobalConfiguration.Configure(WebApiConfig.Register);

            FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters);

            RouteConfig.RegisterRoutes(RouteTable.Routes);

            BundleConfig.RegisterBundles(BundleTable.Bundles);

      }



        public override void Init() //******备注1

        {

            PostAuthenticateRequest += MvcApplication_PostAuthenticateRequest;

       base.Init();

        }



        private void MvcApplication_PostAuthenticateRequest(object sender, EventArgs e)

        {

            HttpContext.Current.SetSessionStateBehavior(

                SessionStateBehavior.Required);

        }

      // .....

}

Startup.cs:

    public partial class Startup

    {

        public void Configuration(IAppBuilder app)

        {

            AutofacConfig.Config(app);

            ConfigureAuth(app);

        }

    }

AutofacConfig.cs:

 class AutofacConfig

    {

        public static IContainer Container

        {

            get; private set;

        }



        public static void Config(IAppBuilder app)

        {

            var builder = new ContainerBuilder();



               //...



            builder.RegisterType<ApplicationDbContext>().AsSelf().As<DbContext>().InstancePerRequest();

            //builder.RegisterType<ApplicationUserManager>().InstancePerRequest();

            builder.Register<ApplicationUserManager>(

                c => ApplicationUserManager.Create2(c.Resolve<IUserStore<UserEntity>>())).InstancePerRequest();

            builder.RegisterType<UserStore<UserEntity>>().As<IUserStore<UserEntity>>();





            // Get your HttpConfiguration. In OWIN, you'll create one

            // rather than using GlobalConfiguration.

            var config = new HttpConfiguration();                            ///******************备注2******************* 

            //var config = GlobalConfiguration.Configuration;

         

            // don't forget this line

            //AreaRegistration.RegisterAllAreas();            

            WebApiConfig.Register(config);



            // for MVC ...

            #region 

         

            // Register your MVC controllers.

            builder.RegisterControllers(typeof(MvcApplication).Assembly);



            // Run other optional steps, like registering model binders,

            // web abstractions, etc., then set the dependency resolver

            // to be Autofac.

            // OPTIONAL: Register model binders that require DI.

            builder.RegisterModelBinders(Assembly.GetExecutingAssembly());

            builder.RegisterModelBinderProvider();



            // OPTIONAL: Register web abstractions like HttpContextBase.

            builder.RegisterModule<AutofacWebTypesModule>();



            // OPTIONAL: Enable property injection in view pages.

            builder.RegisterSource(new ViewRegistrationSource());



            // OPTIONAL: Enable property injection into action filters.

            builder.RegisterFilterProvider();



            // OPTIONAL: Enable action method parameter injection (RARE).

            //builder.InjectActionInvoker();

            #endregion



            // for WebApi2 ...

            #region

            // Register your Web API controllers.

            builder.RegisterApiControllers(Assembly.GetExecutingAssembly());            



            // OPTIONAL: Register the Autofac filter provider.

            builder.RegisterWebApiFilterProvider(config);

           

            #endregion



            var container = builder.Build();

            Container = container;

            DependencyResolver.SetResolver(new AutofacDependencyResolver(container));

            config.DependencyResolver = new AutofacWebApiDependencyResolver(container);



            // OWIN MVC and WebApi2 SETUP ...



            // Register the Autofac middleware FIRST, then the Autofac Web API middleware,

            // and finally the standard Web API middleware.

            app.UseAutofacMiddleware(container);

            app.UseAutofacMvc();

            app.UseAutofacWebApi(config);

            app.UseWebApi(config);

        }

    }

Areas/HomeAreaRegistration.cs:

public class HomeAreaRegistration : AreaRegistration 

    {

        public override string AreaName 

        {

            get 

            {

                return "Home";

            }

        }



        public override void RegisterArea(AreaRegistrationContext context) 

        {

            context.Routes.MapHttpRoute(

                name: "Home_WebApiRout",

                routeTemplate: "api/Home/{controller}/{action}/{id}",

                defaults: new { action = "Index", id = RouteParameter.Optional }

            );



            context.MapRoute(

                "Home_default",

                "Home/{controller}/{action}/{id}",

                new { action = "Index", id = UrlParameter.Optional }

            );

        }

    }

Areas/Home/AbcController.cs

  public class AbcController : ApiController

    {

        private ApplicationSignInManager _signInManager;

        private ApplicationUserManager _userManager;

        private ICultureService _cultureSvc;

        private IUserService _userSvc;

        private ILogService _logSvc;



        public AbcController(ICultureService cultureSvc, IUserService userSvc, ILogService logSvc)

        {

            _cultureSvc = cultureSvc;

            _userSvc = userSvc;

            _logSvc = logSvc;

        }



       

        [AllowAnonymous]

        [HttpGet]

          public IHttpActionResult GetTest()

        {

            var s = HttpContext.Current.Session;

            return Ok();

        }

          

    }

AccountController.cs:

public class AccountController : Controller

    {



        // ...



        public AccountController(ApplicationUserManager userManager, ApplicationSignInManager signInManager,

            ICultureService cultureSvc, IUserService userSvc, ILogService logSvc)

        {

            UserManager = userManager;

            SignInManager = signInManager;



            _cultureSvc = cultureSvc;

            _userSvc = userSvc;

            _logSvc = logSvc;

        }



    



        //

        // GET: /Account/Login

        [AllowAnonymous]       

        public async Task<ActionResult> Login(string returnUrl)

        {

            ViewBag.ReturnUrl = returnUrl;



            await _cultureSvc.DeduceCultureNameAsync();



            return View();

        }



        //...

    }