c# - ASP Web API-IoC-解决HttpRequestMessage

我正在尝试使用ASP.NET WebAPI设置温莎城堡。

我还使用了Hyprlinkr软件包(https://github.com/ploeh/Hyprlinkr)，因此需要将HttpRequestMessage的实例注入(inject)到 Controller 的依赖项之一中。

我正在关注Mark Seemann-http://blog.ploeh.dk/2012/04/19/WiringHttpControllerContextWithCastleWindsor.aspx的这篇文章，但是我发现尽管API运行了，但是当我对其进行调用时，请求只是挂起了。没有错误讯息。就好像它处于无限循环中一样。它卡在我的Custom ControllerActivator中的Resolve调用上

我以为我的城堡注册有误。如果删除上面文章中提到的内容，则可以成功调用API(尽管无需解决依赖关系)

有任何想法吗？

代码在下面

//Global.asax
public class WebApiApplication : HttpApplication
{
    private readonly IWindsorContainer container;

    public WebApiApplication()
    {
        container =
            new WindsorContainer(
                new DefaultKernel(
                    new InlineDependenciesPropagatingDependencyResolver(),
                    new DefaultProxyFactory()),
                new DefaultComponentInstaller());

        container.Install(new DependencyInstaller());
    }

    protected void Application_Start()
    {
        GlobalConfiguration.Configuration.Services.Replace(typeof(IHttpControllerActivator), new WindsorCompositionRoot(this.container));
    }

// installer
public class DependencyInstaller : IWindsorInstaller
{
    public void Install(IWindsorContainer container, IConfigurationStore store)
    {
        container.AddFacility<TypedFactoryFacility>();

        container.Register(
            Component.For<ValuesController>()
                .Named("ValuesController")
                .LifeStyle.PerWebRequest,

            Component.For<IResourceLinker>()
                .ImplementedBy<RouteLinker>()
                .LifeStyle.PerWebRequest,

            Component.For<IResourceModelBuilder>()
                .ImplementedBy<ResourceModelBuilder>()
                .LifeStyle.PerWebRequest,

                Component.For<HttpRequestMessage>()
                .Named("HttpRequestMessage")
                .LifeStyle.PerWebRequest
            );
    }
}

//Activator

public class WindsorCompositionRoot : IHttpControllerActivator
{
    private readonly IWindsorContainer container;

    public WindsorCompositionRoot(IWindsorContainer container)
    {
        this.container = container;
    }

    public IHttpController Create(
        HttpRequestMessage request,
        HttpControllerDescriptor controllerDescriptor,
        Type controllerType)
    {
        var controller = (IHttpController)this.container.Resolve(controllerType, new { request = request });

        request.RegisterForDispose(
            new Release(
                () => this.container.Release(controller)));

        return controller;
    }

// DependencyResolver
public class InlineDependenciesPropagatingDependencyResolver : DefaultDependencyResolver
{
    protected override CreationContext RebuildContextForParameter(CreationContext current, Type parameterType)
    {
        if (parameterType.ContainsGenericParameters)
        {
            return current;
        }

        return new CreationContext(parameterType, current, true);
    }
}

编辑***********
附加信息****************

因此，我设置了一个场景，其中 Controller 仅将HttpRequestMessage作为ctor参数，然后发现:

这有效:

//controller
public class ValuesController : ApiController
    {
        private readonly HttpRequestMessage _httpReq;

        public ValuesController(HttpRequestMessage httpReq)
        {
            _httpReq = httpReq;
        }
//IHttpControllerActivator
public IHttpController Create(
            HttpRequestMessage httpRequest,
            HttpControllerDescriptor controllerDescriptor,
            Type controllerType)
        {

            var controller = (IHttpController)this.container.Resolve(
                controllerType, new { httpReq = httpRequest });

            return controller;

但是，事实并非如此。

//controller
public class ValuesController : ApiController
    {
        private readonly HttpRequestMessage _httpReq;

        public ValuesController(HttpRequestMessage request)
        {
            _httpReq = request;
        }

//IHttpControllerActivator
public IHttpController Create(
            HttpRequestMessage request,
            HttpControllerDescriptor controllerDescriptor,
            Type controllerType)
        {

            var controller = (IHttpController)this.container.Resolve(
                controllerType, new { request = request });

            return controller;

即，当匿名对象具有名为“request”的属性，而 Controller ctor arg称为“request”时。它使 Controller 以某种方式认为它的request属性为null。这是什么导致我看到错误的原因:



读过这个
How can I enrich object composition in StructureMap without invoking setter injection?

它解释了类似的情况。

当然，hyprlinkr为HttpRequestMessage提供了ctor arg，称为“request”，因此我确实需要使用该属性名称指定anon对象。

有任何想法吗？

最佳答案

这是一个对我有用的合成根:

public class WindsorCompositionRoot : IHttpControllerActivator
{
    private readonly IWindsorContainer container;

    public WindsorCompositionRoot(IWindsorContainer container)
    {
        this.container = container;
    }

    public IHttpController Create(
        HttpRequestMessage request,
        HttpControllerDescriptor controllerDescriptor,
        Type controllerType)
    {
        var controller = (IHttpController)this.container.Resolve(
            controllerType,
            new
            {
                request = request
            });

        request.RegisterForDispose(
            new Release(
                () => this.container.Release(controller)));
        return controller;
    }

    private class Release : IDisposable
    {
        private readonly Action release;

        public Release(Action release)
        {
            this.release = release;
        }

        public void Dispose()
        {
            this.release();
        }
    }
}

这是我创建容器的方法:

this.container =
    new WindsorContainer(
        new DefaultKernel(
            new InlineDependenciesPropagatingDependencyResolver(),
            new DefaultProxyFactory()),
        new DefaultComponentInstaller())
        .Install(new MyWindsorInstaller());

这是InlineDependenciesPropagatingDependencyResolver:

public class InlineDependenciesPropagatingDependencyResolver :
    DefaultDependencyResolver
{
    protected override CreationContext RebuildContextForParameter(
        CreationContext current,
        Type parameterType)
    {
        if (parameterType.ContainsGenericParameters)
        {
            return current;
        }

        return new CreationContext(parameterType, current, true);
    }
}

最后，这是我注册RouteLinker的方法:

container.Register(Component
    .For<RouteLinker, IResourceLinker>()
    .LifestyleTransient());

要注意的一件事是ApiController基类具有HttpRequestMessage类型的名为Request的公共(public)属性。如my book的10.4.3节所述，如果温莎具有匹配的组件，并且该匹配不区分大小写，它将尝试为每个可写属性分配一个值。

当您将名为request的HttpRequestMessage传递给Resolve方法时，就会发生这种情况，因此您需要告诉CaSTLe Windsor它应该放弃ApiControllers的属性注入(inject)。这是我在基于约定的注册中这样做的方式:

container.Register(Classes
    .FromThisAssembly()
    .BasedOn<IHttpController>()
    .ConfigureFor<ApiController>(c => c.Properties(pi => false))
    .LifestyleTransient());