1 files changed, 61 insertions, 0 deletions
diff --git a/src/DotNetOpenAuth.Mvc/MvcExtensions.cs b/src/DotNetOpenAuth.Mvc/MvcExtensions.cs
new file mode 100644
index 0000000..29f6747
--- /dev/null
+++ b/src/DotNetOpenAuth.Mvc/MvcExtensions.cs
@@ -0,0 +1,61 @@
+//-----------------------------------------------------------------------
+// <copyright file="MvcExtensions.cs" company="Andrew Arnott">
+//     Copyright (c) Andrew Arnott. All rights reserved.
+// </copyright>
+//-----------------------------------------------------------------------
+
+namespace DotNetOpenAuth.Messaging
+{
+	using System;
+	using System.Collections.Generic;
+	using System.Linq;
+	using System.Net.Http;
+	using System.Text;
+	using System.Threading.Tasks;
+	using System.Web.Mvc;
+	using DotNetOpenAuth.Messaging;
+	using Validation;
+
+	/// <summary>
+	/// DotNetOpenAuth extensions for ASP.NET MVC.
+	/// </summary>
+	public static class MvcExtensions {
+		/// <summary>
+		/// Wraps a response message as an MVC <see cref="ActionResult"/> so it can be conveniently returned from an MVC controller's action method.
+		/// </summary>
+		/// <param name="response">The response message.</param>
+		/// <returns>An <see cref="ActionResult"/> instance.</returns>
+		public static ActionResult AsActionResult(this HttpResponseMessage response) {
+			Requires.NotNull(response, "response");
+			return new HttpResponseMessageActionResult(response);
+		}
+
+		/// <summary>
+		/// An MVC <see cref="ActionResult"/> that wraps an <see cref="HttpResponseMessage"/>
+		/// </summary>
+		private class HttpResponseMessageActionResult : ActionResult {
+			/// <summary>
+			/// The wrapped response.
+			/// </summary>
+			private readonly HttpResponseMessage response;
+
+			/// <summary>
+			/// Initializes a new instance of the <see cref="HttpResponseMessageActionResult"/> class.
+			/// </summary>
+			/// <param name="response">The response.</param>
+			internal HttpResponseMessageActionResult(HttpResponseMessage response) {
+				Requires.NotNull(response, "response");
+				this.response = response;
+			}
+
+			/// <summary>
+			/// Enables processing of the result of an action method by a custom type that inherits from the <see cref="T:System.Web.Mvc.ActionResult" /> class.
+			/// </summary>
+			/// <param name="context">The context in which the result is executed. The context information includes the controller, HTTP content, request context, and route data.</param>
+			public override void ExecuteResult(ControllerContext context) {
+				// Sadly, MVC doesn't support writing to the response stream asynchronously.
+				this.response.SendAsync(context.HttpContext).GetAwaiter().GetResult();
+			}
+		}
+	}
+}