Added hostname parameter to avoid ambiguity

Author: davidfowl

samples/SampleStartups/StartupHelloWorld.cs

@@ -22,7 +22,7 @@ public static void Main()
         public static void MainWithPort()
         {
             var host = new WebHostBuilder()
-                .Run(8080, async context =>
+                .Run("localhost", 8080, async context =>
                 {
                     await context.Response.WriteAsync("Hello World");
                 });
@@ -33,13 +33,13 @@ public static void MainWithPort()
         public static void MainWithMiddlewareWithPort()
         {
             var host = new WebHostBuilder()
-                .RunApplication(8080, app =>
+                .RunApplication("localhost", 8080, app =>
                 {
                     // You can add middleware here
                     app.Run(async context =>
-                        {
-                            await context.Response.WriteAsync("Hello World");
-                        });
+                    {
+                        await context.Response.WriteAsync("Hello World");
+                    });
                 });
 
             host.WaitForShutdown();

src/Microsoft.AspNetCore.Hosting/WebHostBuilderExtensions.cs

@@ -110,11 +110,12 @@ public static IWebHost Run(this IWebHostBuilder hostBuilder, RequestDelegate han
         /// Runs a web application with the specified handler
         /// </summary>
         /// <param name="hostBuilder">The <see cref="IWebHostBuilder"/> to run.</param>
+        /// <param name="hostname">The host name to bind to.</param>
         /// <param name="port">The port to bind to.</param>
         /// <param name="handler">A delegate that handles the request.</param>
-        public static IWebHost Run(this IWebHostBuilder hostBuilder, int port, RequestDelegate handler)
+        public static IWebHost Run(this IWebHostBuilder hostBuilder, string hostname, int port, RequestDelegate handler)
         {
-            var host = hostBuilder.UseUrls($"http://*:{port}/")
+            var host = hostBuilder.UseUrls($"http://{hostname}:{port}/")
                                   .Configure(app => app.Run(handler))
                                   .Build();
             host.Start();
@@ -137,11 +138,12 @@ public static IWebHost RunApplication(this IWebHostBuilder hostBuilder, Action<I
         /// Runs a web application with the specified handler
         /// </summary>
         /// <param name="hostBuilder">The <see cref="IWebHostBuilder"/> to run.</param>
+        /// <param name="hostname">The host name to bind to.</param>
         /// <param name="port">The port to bind to.</param>
         /// <param name="configure">The delegate that configures the <see cref="IApplicationBuilder"/>.</param>
-        public static IWebHost RunApplication(this IWebHostBuilder hostBuilder, int port, Action<IApplicationBuilder> configure)
+        public static IWebHost RunApplication(this IWebHostBuilder hostBuilder, string hostname, int port, Action<IApplicationBuilder> configure)
         {
-            var host = hostBuilder.UseUrls($"http://*:{port}/")
+            var host = hostBuilder.UseUrls($"http://{hostname}:{port}/")
                                   .Configure(configure)
                                   .Build();
             host.Start();