如何在Unity中实现这个（HttpContext）依赖？

we have a class with a dependency to the HttpContext. We've implemented it like this:

我们有一个依赖于HttpContext的类。我们已经实现了这样：

public SiteVariation() : this(new HttpContextWrapper(HttpContext.Current))
{
}
public SiteVariation(HttpContextBase context)
{}

Now what i want to do is to instantiate the SiteVariation class via Unity, so we can create one constructor. But i do not know how to configure this new HttpContextWrapper(HttpContext.Current)) in Unity in the config way.

现在我想要做的是通过Unity实例化SiteVariation类，所以我们可以创建一个构造函数。但我不知道如何在配置方式中在Unity中配置这个新的HttpContextWrapper（HttpContext.Current）。

ps this is the config way we use

ps这是我们使用的配置方式

<type type="Web.SaveRequest.ISaveRequestHelper, Common" mapTo="Web.SaveRequest.SaveRequestHelper, Common" />

2 个解决方案

#1

I wouldn't take a dependency on HttpContextBase directly. I would instead create a wrapper around it, and use the bits you need:

我不会直接依赖HttpContextBase。我会在它周围创建一个包装器，并使用你需要的位：

public interface IHttpContextBaseWrapper
{
   HttpRequestBase Request {get;}
   HttpResponseBase Response {get;}
   //and anything else you need
}

then the implementation:

那么实施：

public class HttpContextBaseWrapper : IHttpContextBaseWrapper
{
   public HttpRequestBase Request {get{return HttpContext.Current.Request;}}
   public HttpResponseBase Response {get{return HttpContext.Current.Response;}}
   //and anything else you need
}

This way, your class now just relies on a wrapper, and doesn't need the actual HttpContext to function. Makes it much easier to inject, and much easier to test:

这样，你的类现在只依赖于一个包装器，并且不需要实际的HttpContext来运行。使注入更容易，并且更容易测试：

public SiteVariation(IHttpContextBaseWrapper context)
{

}

var container = new UnityContainer();
container.RegisterType<IHttpContextBaseWrapper ,HttpContextBaseWrapper>();

#2

Microsoft has already built great wrappers and abstractions around HttpContext, HttpRequest and HttpResponse that is included in .NET so I would definitely use those directly rather than wrapping it myself.

微软已经围绕HttpContext，HttpRequest和HttpResponse建立了很好的包装和抽象，因此我肯定会直接使用它们而不是自己包装它们。

You can configure Unity for HttpContextBase by using InjectionFactory, like this:

您可以使用InjectionFactory为HttpContextBase配置Unity，如下所示：

var container = new UnityContainer(); 

container.RegisterType<HttpContextBase>(new InjectionFactory(_ => 
    new HttpContextWrapper(HttpContext.Current)));

Additionally, if you need HttpRequestBase (which I tend to use the most) and HttpResponseBase, you can register them like this:

另外，如果您需要HttpRequestBase（我倾向于使用最多）和HttpResponseBase，您可以像这样注册它们：

container.RegisterType<HttpRequestBase>(new InjectionFactory(_ => 
    new HttpRequestWrapper(HttpContext.Current.Request)));

container.RegisterType<HttpResponseBase>(new InjectionFactory(_ => 
    new HttpResponseWrapper(HttpContext.Current.Response)));

You can easily mock HttpContextBase, HttpRequestBase and HttpResponseBase in unit tests without custom wrappers.

您可以在没有自定义包装器的单元测试中轻松模拟HttpContextBase，HttpRequestBase和HttpResponseBase。

#1