OWIN: Change interop extension methods.

src/Microsoft.AspNet.Owin/Microsoft.AspNet.Owin.kproj

@@ -25,7 +25,6 @@
     <Compile Include="OwinEnvironment.cs" />
     <Compile Include="OwinExtensions.cs" />
     <Compile Include="OwinFeatureCollection.cs" />
-    <Compile Include="OwinMiddlewareFactory.cs" />
   </ItemGroup>
   <Import Project="$(VSToolsPath)\ProjectK\Microsoft.Web.ProjectK.targets" Condition="'$(VSToolsPath)' != ''" />
 </Project>

src/Microsoft.AspNet.Owin/OwinExtensions.cs

@@ -3,28 +3,86 @@ using System.Collections.Generic;
 using System.Threading.Tasks;
 using Microsoft.AspNet.Abstractions;
 using Microsoft.AspNet.Owin;
+using Microsoft.AspNet.PipelineCore;
 
 namespace Microsoft.AspNet
 {
     using AppFunc = Func<IDictionary<string, object>, Task>;
+    using CreateMiddleware = Func<
+          Func<IDictionary<string, object>, Task>,
+          Func<IDictionary<string, object>, Task>
+        >;
+    using AddMiddleware = Action<Func<
+          Func<IDictionary<string, object>, Task>,
+          Func<IDictionary<string, object>, Task>
+        >>;
 
     public static class OwinExtensions
     {
-        public static IBuilder UseOwinMiddleware(this IBuilder builder, Func<AppFunc, AppFunc> middleware)
+        public static AddMiddleware UseOwin(this IBuilder builder)
         {
-            Func<RequestDelegate, RequestDelegate> middleware1 = next1 =>
+            return middleware =>
             {
-                AppFunc exitMiddlware = env =>
+                Func<RequestDelegate, RequestDelegate> middleware1 = next1 =>
                 {
-                    return next1((HttpContext)env[typeof(HttpContext).FullName]);
+                    AppFunc exitMiddlware = env =>
+                    {
+                        return next1((HttpContext)env[typeof(HttpContext).FullName]);
+                    };
+                    var app = middleware(exitMiddlware);
+                    return httpContext =>
+                    {
+                        return app.Invoke(new OwinEnvironment(httpContext));
+                    };
                 };
-                var app = middleware(exitMiddlware);
-                return httpContext =>
+                builder.Use(middleware1);
+            };
+        }
+
+        public static IBuilder UseOwin(this IBuilder builder, Action<AddMiddleware> pipeline)
+        {
+            pipeline(builder.UseOwin());
+            return builder;
+        }
+
+        public static IBuilder UseBuilder(this AddMiddleware app)
+        {
+            var builder = new Builder(serviceProvider: null);
+
+            CreateMiddleware middleware = CreateMiddlewareFactory(exit =>
+            {
+                builder.Use(ignored => exit);
+                return builder.Build();
+            });
+
+            app(middleware);
+            return builder;
+        }
+
+        private static CreateMiddleware CreateMiddlewareFactory(Func<RequestDelegate, RequestDelegate> middleware)
+        {
+            return next =>
+            {
+                var app = middleware(httpContext =>
                 {
-                    return app.Invoke(new OwinEnvironment(httpContext));
+                    return next(httpContext.GetFeature<ICanHasOwinEnvironment>().Environment);
+                });
+
+                return env =>
+                {
+                    return app.Invoke(
+                        new DefaultHttpContext(
+                            new FeatureCollection(
+                                    new OwinFeatureCollection(env))));
                 };
             };
-            return builder.Use(middleware1);
+        }
+
+        public static AddMiddleware UseBuilder(this AddMiddleware app, Action<IBuilder> pipeline)
+        {
+            var builder = app.UseBuilder();
+            pipeline(builder);
+            return app;
         }
     }
 }

src/Microsoft.AspNet.Owin/OwinMiddlewareFactory.cs

@@ -1,50 +0,0 @@
-using System;
-using System.Collections.Generic;
-using System.Threading.Tasks;
-using Microsoft.AspNet.Abstractions;
-using Microsoft.AspNet.FeatureModel;
-using Microsoft.AspNet.PipelineCore;
-
-namespace Microsoft.AspNet.Owin
-{
-    using AppFunc = Func<IDictionary<string, object>, Task>;
-
-    public static class OwinMiddlewareFactory
-    {
-        public static Func<AppFunc, AppFunc> Create(Action<IBuilder> configuration)
-        {
-            return Create(services: null, configuration: configuration);
-        }
-
-        public static Func<AppFunc, AppFunc> Create(IServiceProvider services, Action<IBuilder> configuration)
-        {
-            var builder = new Builder(services);
-            configuration(builder);
-
-            return Create(exit =>
-            {
-                builder.Use(ignored => exit);
-                return builder.Build();
-            });
-        }
-
-        public static Func<AppFunc, AppFunc> Create(Func<RequestDelegate, RequestDelegate> middleware)
-        {
-            return next =>
-            {
-                var app = middleware(httpContext =>
-                {
-                    return next(httpContext.GetFeature<ICanHasOwinEnvironment>().Environment);
-                });
-
-                return env =>
-                {
-                    return app.Invoke(
-                        new DefaultHttpContext(
-                            new FeatureCollection(
-                                    new OwinFeatureCollection(env))));
-                };
-            };
-        }
-    }
-}