Created
February 16, 2012 02:12
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Static resources, caching, and cache busting on AppHarbor
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| 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 | |
| ); | |
| } | |
| } | |
| } |
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| 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); | |
| } | |
| } | |
| } |
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| @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> |
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| 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; | |
| } | |
| } | |
| } |
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