Added extension method to handle the HTTP_PLATFORM_PORT

src/Microsoft.AspNet.IISPlatformHandler/IISWebApplicationBuilderExtensions.cs

@@ -0,0 +1,19 @@
+using System;
+
+namespace Microsoft.AspNet.Hosting
+{
+    public static class IISWebApplicationBuilderExtensions
+    {
+        public static IWebApplicationBuilder UseIISPlatformHandler(this IWebApplicationBuilder webApplicationBuilder)
+        {
+            var httpPlatformPort = Environment.GetEnvironmentVariable("HTTP_PLATFORM_PORT");
+
+            if (string.IsNullOrEmpty(httpPlatformPort))
+            {
+                return webApplicationBuilder;
+            }
+
+            return webApplicationBuilder.UseSetting(WebApplicationDefaults.ServerUrlsKey, $"http://localhost:{httpPlatformPort}/");
+        }
+    }
+}

src/Microsoft.AspNet.IISPlatformHandler/project.json

@@ -10,6 +10,7 @@
       "url": "git://github.com/aspnet/IISIntegration"
   },
   "dependencies": {
+    "Microsoft.AspNet.Hosting.Abstractions": "1.0.0-*",
     "Microsoft.AspNet.Http": "1.0.0-*",
     "Microsoft.AspNet.Http.Extensions": "1.0.0-*",
     "Microsoft.Extensions.SecurityHelper.Sources": {

test/TestSites/Program.cs

@@ -9,8 +9,10 @@ public static class Program
     {
         public static void Main(string[] args)
         {
+            var hostingConfiguration = WebApplicationConfiguration.GetDefault(args);
             var application = new WebApplicationBuilder()
-                .UseConfiguration(WebApplicationConfiguration.GetDefault(args))
+                .UseIISPlatformHandler()
+                .UseConfiguration(hostingConfiguration)
                 .UseStartup("TestSites")
                 .Build();