LearningMVC/UrlsAndRoutes/Infrastructure/LegacyRoute.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using System.Web.Routing;

namespace UrlsAndRoutes.Infrastructure
{
	public class LegacyRoute : RouteBase
	{
		private string[] urls;

		public LegacyRoute(params string[] targetUrls)
		{
			urls = targetUrls;
		}

		public override RouteData GetRouteData(HttpContextBase httpContext)
		{
			RouteData result = null;

			string requestedUrl = httpContext.Request.AppRelativeCurrentExecutionFilePath;
			if (urls.Contains(requestedUrl, StringComparer.OrdinalIgnoreCase))
			{
				result = new RouteData(this, new MvcRouteHandler());
				result.Values.Add("controller", "Legacy");
				result.Values.Add("action", "GetLegacyURL");
				result.Values.Add("legacyURL", requestedUrl);
			}

			return result;
		}

		public override VirtualPathData GetVirtualPath(RequestContext requestContext, RouteValueDictionary values)
		{
			VirtualPathData result = null;

			if (values.ContainsKey("legacyURL") && urls.Contains((string)values["legacyURL"], StringComparer.OrdinalIgnoreCase))
			{
				result = new VirtualPathData(this, new UrlHelper(requestContext).Content((string)values["legacyURL"]).Substring(1));
			}

			return result;
		}
	}
}