如何在ASP.NET 5中使用基于IAppBuilder的Owin中间件 [英] How to use IAppBuilder-based Owin Middleware in ASP.NET 5

问题描述

ASP.NET 5(aspnet vnext)像Katana一样是基于OWIN的，但是具有不同的抽象.显然IAppBuilder已被IApplicationBuilder代替.许多中间件库依赖于IAppBuilder，并且尚未进行更新以支持ASP.NET 5

ASP.NET 5 (aspnet vnext) is OWIN based like Katana was, but has different abstractions. Notably IAppBuilder has been replaced by IApplicationBuilder. Many middleware libraries depend on IAppBuilder and have not been updated to support 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，所以应该有可能.

How can I use this OWIN middleware in APS.NET 5 middleware. Both are OWIN based so it should be possible.

Microsoft.AspNet.Builder.OwinExtensions确实提供了UseOwin方法，但是它基于低级OWIN签名，因此不能与需要IAppBuilder的方法一起使用.

Microsoft.AspNet.Builder.OwinExtensions does provide a UseOwin method, but it is based on the low-level OWIN signatures so cannot be used with methods expecting IAppBuilder.

推荐答案

您现在可以使用 AspNet.Hosting.Katana.Extensions程序包.

you can now use the AspNet.Hosting.Katana.Extensions package for that.

这里是一个稍有不同的版本，使用的是AppBuilder.DefaultApp:

Here's a slightly different version, that uses 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(Core CLR)不兼容.

Note that referencing Microsoft.Owin makes your app incompatible with dnxcore50 (Core CLR).

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