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.NET中依赖IIS，通俗的说就是依赖IIS的程序集，导致我们的.NET项目就算是MONO到TOMCAT上，也无法使用，所以OWEN横空出世，OWEN定义了一套接口，接口定义了做.NET项目要实现的一些接口，OWEN本身通过这些接口获取到我们项目中的Request/Response，拿着这些去和Server(IIS\APCHE\TOMCAT...)通信.
回到正题，我们知道在MVC中，可以有
public override void OnActionExecuted(ActionExecutedContext filterContext)
public override void OnAuthorization(AuthorizationContext filterContext)
...
OWEN中就是
namespace Owin
{
/// <summary>
/// An ordered list of known Asp.Net integrated pipeline stages. More details on the ASP.NET integrated pipeline can be found at http://msdn.microsoft.com/en-us/library/system.web.httpapplication.aspx
/// </summary>
public enum PipelineStage
{
/// <summary>
/// Corresponds to the AuthenticateRequest stage of the ASP.NET integrated pipeline.
/// </summary>
Authenticate,
/// <summary>
/// Corresponds to the PostAuthenticateRequest stage of the ASP.NET integrated pipeline.
/// </summary>
PostAuthenticate,
/// <summary>
/// Corresponds to the AuthorizeRequest stage of the ASP.NET integrated pipeline.
/// </summary>
Authorize,
/// <summary>
/// Corresponds to the PostAuthorizeRequest stage of the ASP.NET integrated pipeline.
/// </summary>
PostAuthorize,
/// <summary>
/// Corresponds to the ResolveRequestCache stage of the ASP.NET integrated pipeline.
/// </summary>
ResolveCache,
/// <summary>
/// Corresponds to the PostResolveRequestCache stage of the ASP.NET integrated pipeline.
/// </summary>
PostResolveCache,
/// <summary>
/// Corresponds to the MapRequestHandler stage of the ASP.NET integrated pipeline.
/// </summary>
MapHandler,
/// <summary>
/// Corresponds to the PostMapRequestHandler stage of the ASP.NET integrated pipeline.
/// </summary>
PostMapHandler,
/// <summary>
/// Corresponds to the AcquireRequestState stage of the ASP.NET integrated pipeline.
/// </summary>
AcquireState,
/// <summary>
/// Corresponds to the PostAcquireRequestState stage of the ASP.NET integrated pipeline.
/// </summary>
PostAcquireState,
/// <summary>
/// Corresponds to the PreRequestHandlerExecute stage of the ASP.NET integrated pipeline.
/// </summary>
PreHandlerExecute,
}
}
差不多够用了。
代码会这么写：
首先要确定拦截到这个过滤器之后，要干啥
app.Use(typeof(OAuthBearerAuthenticationMiddleware), app, options);
OAuthBearerAuthenticationMiddleware是时间了OWEN接口的自定义中间件，授权用
然后定义中间件在哪个过滤器注入
object obj;
if (app.Properties.TryGetValue("integratedpipeline.StageMarker", out obj))
{
var addMarker = (Action<IAppBuilder, string>)obj;
addMarker(app, PipelineStage.Authenticate.ToString());
}
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原文地址：http://www.cnblogs.com/nopassword/p/5872835.html
