Add simpler prerendering API. Fixes #607

src/Microsoft.AspNetCore.SpaServices/Prerendering/PrerenderingServiceCollectionExtensions.cs

@@ -0,0 +1,27 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+using Microsoft.AspNetCore.Http;
+using Microsoft.AspNetCore.NodeServices;
+using Microsoft.AspNetCore.SpaServices.Prerendering;
+using Microsoft.Extensions.DependencyInjection.Extensions;
+
+namespace Microsoft.Extensions.DependencyInjection
+{
+    /// <summary>
+    /// Extension methods for setting up prerendering features in an <see cref="IServiceCollection" />.
+    /// </summary>
+    public static class PrerenderingServiceCollectionExtensions
+    {
+        /// <summary>
+        /// Configures the dependency injection system to supply an implementation
+        /// of <see cref="ISpaPrerenderer"/>.
+        /// </summary>
+        /// <param name="serviceCollection">The <see cref="IServiceCollection"/>.</param>
+        public static void AddSpaPrerenderer(this IServiceCollection serviceCollection)
+        {
+            serviceCollection.TryAddSingleton<IHttpContextAccessor, HttpContextAccessor>();
+            serviceCollection.AddSingleton<ISpaPrerenderer, DefaultSpaPrerenderer>();
+        }
+    }
+}