elithompson/Global.asax.cs

## Global.asax.cs
namespace Website
{
    public class MvcApplication : System.Web.HttpApplication
    {
        public static void RegisterRoutes(RouteCollection routes)
        {
            routes.IgnoreRoute("{resource}.axd/{*pathInfo}");

            routes.MapRoute(
                "Statics",
                "s/{staticResourceVersion}/{*path}",
                new { controller = "Statics", action = "Index" }
            );

            routes.MapRoute(
                "Default", // Route name
                "{controller}/{action}/{id}", // URL with parameters
                new { controller = "Home", action = "Index", id = UrlParameter.Optional } // Parameter defaults
            );
        }
    }
}

## HtmlHelperExtensions.cs
using System;
using System.Configuration;
using System.Linq;
using System.Linq.Expressions;
using System.Web;
using System.Web.Mvc;

namespace Core.Html
{
    public static class HtmlHelperExtensions
    {
        public static string StaticContent(this UrlHelper helper, string contentPath)
        {
            var staticResourceVersion = (ConfigurationManager.AppSettings.Get("appharbor.commit_id") ?? "_default").Substring(0, 8);
            var staticServer = ConfigurationManager.AppSettings.Get(ConfigKeys.StaticServer);
            var prefix = "";
            if (!string.IsNullOrEmpty(staticServer))
                prefix = "//" + staticServer;

            return prefix + "/s/" + staticResourceVersion + helper.Content(contentPath);
        }
    }
}

## SampleStaticContentUsage.cshtml
@using Core.Html
<!DOCTYPE html>
<html>
<head>
    <link rel="Stylesheet" href="@Url.StaticContent("~/css/style.css")" />
    <script type="text/javascript" src="@Url.StaticContent("~/Scripts/script.js")"></script>
</head>
<body>

</body>
</html>

## StaticsController.cs
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Web;
using System.Web.Mvc;

namespace Website.Controllers
{
    public class StaticsController : Controller
    {
        private readonly HttpResponseBase _response;
        private readonly HttpRequestBase _request;

        public StaticsController(HttpResponseBase response, HttpRequestBase request)
        {
            _response = response;
            _request = request;
        }

        public ActionResult Index(string staticResourceVersion, string path)
        {
            if (!IsAllowed(path))
                return new HttpStatusCodeResult(404);

            if (!_request.IsLocal)
            {
                _response.Cache.SetCacheability(HttpCacheability.Public);
                _response.Cache.SetExpires(DateTime.Now.AddYears(1));
            }

            return File(Server.MapPath("~/" + path), GetContentType(path));
        }

        private bool IsAllowed(string path)
        {
            if (string.IsNullOrEmpty(path))
                return false;

            var lowerPath = path.ToLower();

            if (!lowerPath.StartsWith("img/") && !lowerPath.StartsWith("scripts/") && !lowerPath.StartsWith("css/"))
                return false;

            if (!lowerPath.EndsWith(".png") && !lowerPath.EndsWith(".css") && !lowerPath.EndsWith(".js"))
                return false;

            if (lowerPath.Contains(".."))
                return false;

            return true;
        }

        private static string GetContentType(string path)
        {
            var extension = Path.GetExtension(path);
            switch (extension)
            {
                case ".js":
                    return "text/javascript";
                case ".css":
                    return "text/css";
                case ".png":
                    return "image/png";
            }
            return null;
        }

    }
}
	namespace Website
	{
	public class MvcApplication : System.Web.HttpApplication
	{
	public static void RegisterRoutes(RouteCollection routes)
	{
	routes.IgnoreRoute("{resource}.axd/{*pathInfo}");

	routes.MapRoute(
	"Statics",
	"s/{staticResourceVersion}/{*path}",
	new { controller = "Statics", action = "Index" }
	);

	routes.MapRoute(
	"Default", // Route name
	"{controller}/{action}/{id}", // URL with parameters
	new { controller = "Home", action = "Index", id = UrlParameter.Optional } // Parameter defaults
	);
	}
	}
	}
	using System;
	using System.Configuration;
	using System.Linq;
	using System.Linq.Expressions;
	using System.Web;
	using System.Web.Mvc;

	namespace Core.Html
	{
	public static class HtmlHelperExtensions
	{
	public static string StaticContent(this UrlHelper helper, string contentPath)
	{
	var staticResourceVersion = (ConfigurationManager.AppSettings.Get("appharbor.commit_id") ?? "_default").Substring(0, 8);
	var staticServer = ConfigurationManager.AppSettings.Get(ConfigKeys.StaticServer);
	var prefix = "";
	if (!string.IsNullOrEmpty(staticServer))
	prefix = "//" + staticServer;

	return prefix + "/s/" + staticResourceVersion + helper.Content(contentPath);
	}
	}
	}
	@using Core.Html
	<!DOCTYPE html>
	<html>
	<head>
	<link rel="Stylesheet" href="@Url.StaticContent("~/css/style.css")" />
	<script type="text/javascript" src="@Url.StaticContent("~/Scripts/script.js")"></script>
	</head>
	<body>

	</body>
	</html>
	using System;
	using System.Collections.Generic;
	using System.IO;
	using System.Linq;
	using System.Web;
	using System.Web.Mvc;

	namespace Website.Controllers
	{
	public class StaticsController : Controller
	{
	private readonly HttpResponseBase _response;
	private readonly HttpRequestBase _request;

	public StaticsController(HttpResponseBase response, HttpRequestBase request)
	{
	_response = response;
	_request = request;
	}

	public ActionResult Index(string staticResourceVersion, string path)
	{
	if (!IsAllowed(path))
	return new HttpStatusCodeResult(404);

	if (!_request.IsLocal)
	{
	_response.Cache.SetCacheability(HttpCacheability.Public);
	_response.Cache.SetExpires(DateTime.Now.AddYears(1));
	}

	return File(Server.MapPath("~/" + path), GetContentType(path));
	}

	private bool IsAllowed(string path)
	{
	if (string.IsNullOrEmpty(path))
	return false;

	var lowerPath = path.ToLower();

	if (!lowerPath.StartsWith("img/") && !lowerPath.StartsWith("scripts/") && !lowerPath.StartsWith("css/"))
	return false;

	if (!lowerPath.EndsWith(".png") && !lowerPath.EndsWith(".css") && !lowerPath.EndsWith(".js"))
	return false;

	if (lowerPath.Contains(".."))
	return false;

	return true;
	}

	private static string GetContentType(string path)
	{
	var extension = Path.GetExtension(path);
	switch (extension)
	{
	case ".js":
	return "text/javascript";
	case ".css":
	return "text/css";
	case ".png":
	return "image/png";
	}
	return null;
	}

	}
	}