ASP Web Api - IoC - 解析HttpRequestMessage

Question

我正在尝试使用ASP.NET WebAPI设置Castle Windsor。

我也使用Hyprlinkr包（ https://github.com/ploeh/Hyprlinkr ），因此需要将HttpRequestMessage的实例注入到我的控制器的一个依赖项中。

我正在关注Mark Seemann的这篇文章 - http://blog.ploeh.dk/2012/04/19/WiringHttpControllerContextWithCastleWindsor.aspx ，但我发现尽管API运行，但当我调用它时，请求只是挂起。 没有错误消息。 就好像它处于无限循环中一样。 它停留在我的Custom ControllerActivator调用Resolve上

我想我的一些城堡注册错了。 如果我删除上面文章中提到的那些，那么我可以成功调用API（尽管没有我需要解决的依赖项）

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****************

所以我设置了一个场景，控制器只需要将HttpRequestMessage作为ctor参数，然后找到：

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，这不。

//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anon对象具有称为“request”的属性并且控制器ctor arg被称为“request”时。 它以某种方式使控制器认为它的请求属性为空。 这是导致我看到错误的原因：

无法重用'ApiController'实例。 每个传入消息都必须构造'ApiController'。 检查您的自定义'IHttpControllerActivator'并确保它不会生成相同的实例。

在System.Web.Http.ApiController.ExecuteAsync（HttpControllerContext controllerContext，的CancellationToken的CancellationToken）在System.Web.Http.Dispatcher.HttpControllerDispatcher.SendAsyncInternal（HttpRequestMessage请求，的CancellationToken的CancellationToken）在System.Web.Http.Dispatcher.HttpControllerDispatcher.SendAsync（HttpRequestMessage请求，取消语音取消语句）

阅读本文如何在不调用setter注入的情况下丰富StructureMap中的对象组合？

它解释了类似的情况。

当然，hyprlinkr有一个名为“request”的HttpRequestMessage的ctor arg，所以我确实需要用该属性名指定anon对象。

有任何想法吗？

Answer 1

这是一个适合我的组合根：

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，这是我如何注册RouteLinker：

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

---

需要注意的一点是，ApiController基类有一个名为Request of HttpRequestMessage类型的公共属性。 正如我的书的第10.4.3节所解释的那样，Windsor将尝试为每个可写属性分配一个值，如果它具有匹配的组件 - 并且该匹配不区分大小写。

当您将HttpRequestMessage命名request传递给Resolve方法时，这正是发生的情况，因此您需要告诉Castle Windsor它应该放弃ApiControllers的Property Injection。 以下是我在基于会议的注册中的表达方式：

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

Answer 2

为什么不在ASP.NET Web API中使用已经内置的机制 - 依赖性解析器

http://www.asp.net/web-api/overview/extensibility/using-the-web-api-dependency-resolver

在项目WebApiContrib中有CastleWindsor解析器实现，但正如我在Dependency解析器中看到的那样

https://github.com/WebApiContrib/WebApiContrib.IoC.CastleWindsor

正如Mark在评论中所说 - 实现IHttpControllerActivator的方法之一

http://blog.ploeh.dk/2012/10/03/DependencyInjectionInASPNETWebAPIWithCastleWindsor.aspx