1 files changed, 54 insertions, 0 deletions
diff --git a/samples/OpenIdOfflineProvider/Controllers/HomeController.cs b/samples/OpenIdOfflineProvider/Controllers/HomeController.cs
new file mode 100644
index 0000000..f5a8763
--- /dev/null
+++ b/samples/OpenIdOfflineProvider/Controllers/HomeController.cs
@@ -0,0 +1,54 @@
+namespace DotNetOpenAuth.OpenIdOfflineProvider.Controllers {
+	using System;
+	using System.Collections.Generic;
+	using System.Linq;
+	using System.Net.Http;
+	using System.Text;
+	using System.Threading.Tasks;
+	using System.Web.Http;
+
+	using Validation;
+
+	public class HomeController : ApiController {
+		public HttpResponseMessage Get() {
+			App.Logger.Info("Discovery on OP Identifier detected.");
+			var opEndpoint = this.Url.Link("default", new { controller = "provider" });
+			var opEndpointUri = new Uri(opEndpoint);
+			return new HttpResponseMessage() {
+				Content = new StringContent(GenerateXrdsOPIdentifierDocument(opEndpointUri, Enumerable.Empty<string>()), Encoding.UTF8, "application/xrds+xml"),
+			};
+		}
+
+		/// <summary>
+		/// Generates the OP Identifier XRDS document.
+		/// </summary>
+		/// <param name="providerEndpoint">The provider endpoint.</param>
+		/// <param name="supportedExtensions">The supported extensions.</param>
+		/// <returns>The content of the XRDS document.</returns>
+		private static string GenerateXrdsOPIdentifierDocument(Uri providerEndpoint, IEnumerable<string> supportedExtensions) {
+			Requires.NotNull(providerEndpoint, "providerEndpoint");
+			Requires.NotNull(supportedExtensions, "supportedExtensions");
+
+			const string OPIdentifierDiscoveryFormat = @"<xrds:XRDS
+	xmlns:xrds='xri://$xrds'
+	xmlns:openid='http://openid.net/xmlns/1.0'
+	xmlns='xri://$xrd*($v*2.0)'>
+	<XRD>
+		<Service priority='10'>
+			<Type>http://specs.openid.net/auth/2.0/server</Type>
+			{1}
+			<URI>{0}</URI>
+		</Service>
+	</XRD>
+</xrds:XRDS>";
+
+			string extensions = string.Join(
+				"\n\t\t\t",
+				supportedExtensions.Select(ext => "<Type>" + ext + "</Type>").ToArray());
+			return string.Format(
+				OPIdentifierDiscoveryFormat,
+				providerEndpoint.AbsoluteUri,
+				extensions);
+		}
+	}
+}