Question

ASP.NET 5（aspnet vnext）是基于OWIN的，像Katana一样，但有不同的抽象。值得注意的是IApplicationBuilder已被IAppBuilder取代。许多中间件库依赖于Microsoft.AspNet.Builder.OwinExtensions并且尚未更新以支持ASP.NET 5

如何在APS.NET 5中间件中使用此OWIN中间件。两者都是基于OWIN的，所以它应该是可能的。

UseOwin确实提供了IAppBuilder方法，但它基于低级别的OWIN签名，因此无法与期望{{1}}的方法一起使用。

Answer 1

编辑：您现在可以使用AspNet.Hosting.Katana.Extensions package。

这是一个略有不同的版本，使用AppBuilder.DefaultApp：

public static IApplicationBuilder UseOwinAppBuilder(this IApplicationBuilder app, Action<IAppBuilder> configuration)
{
    if (app == null)
    {
        throw new ArgumentNullException(nameof(app));
    }

    if (configuration == null)
    {
        throw new ArgumentNullException(nameof(configuration));
    }

    return app.UseOwin(setup => setup(next =>
    {
        var builder = new AppBuilder();
        var lifetime = (IApplicationLifetime) app.ApplicationServices.GetService(typeof(IApplicationLifetime));

        var properties = new AppProperties(builder.Properties);
        properties.AppName = app.ApplicationServices.GetApplicationUniqueIdentifier();
        properties.OnAppDisposing = lifetime.ApplicationStopping;
        properties.DefaultApp = next;

        configuration(builder);

        return builder.Build<Func<IDictionary<string, object>, Task>>();
    }));
}

请注意，引用Microsoft.Owin会使您的应用与dnxcore50（核心CLR）不兼容。

Answer 2

经常提到框架兼容的参考文献是an extension method build by Thinktecture for supporting their IdentityServer3 on ASP.NET 5。

该方法特定于IdentityServer，不支持稍后在AspNet管道中注册的任何中间件处理的请求（它不会调用下一个组件）。

这使该方法适应这些缺点：

internal static class IApplicationBuilderExtensions
{
  public static void UseOwin(
    this IApplicationBuilder app,
    Action<IAppBuilder> owinConfiguration )
  {
    app.UseOwin(
      addToPipeline =>
        {
          addToPipeline(
            next =>
              {
                var builder = new AppBuilder();

                owinConfiguration( builder );

                builder.Run( ctx => next( ctx.Environment ) );

                Func<IDictionary<string, object>, Task> appFunc =
                  (Func<IDictionary<string, object>, Task>)
                  builder.Build( typeof( Func<IDictionary<string, object>, Task> ) );

                return appFunc;
              } );
        } );
  }
}

可以按如下方式使用：

app.UseOwin(
    owin =>
        {
            // Arbitrary IAppBuilder registrations can be placed in this block

            // For example, this extension can be provided by
            // NWebsec.Owin or Thinktecture.IdentityServer3
            owin.UseHsts();
        } );

// ASP.NET 5 components, like MVC 6, will still process the request
// (assuming the request was not handled by earlier middleware)
app.UseMvc();

如何在ASP.NET 5中使用基于IAppBuilder的Owin中间件

2 个答案: