Posted with : ASP.NET MVC

Enable compression for website

We can enable content compression by code or by features provided by IIS. Also it can be enabled on both.

Doing compression at IIS level

I think this is a more convenient way to handle this, because no coding requires then no potential bugs. Also it can be changed easily by changing some parameters without any rebuild.

Doing compression at Application level

This attribute is taken from SO site. It is similar to the one on this page

public class CompressAttribute : ActionFilterAttribute { public override void OnActionExecuting(ActionExecutingContext filterContext) {

    var encodingsAccepted = filterContext.HttpContext.Request.Headers["Accept-Encoding"];
    if (string.IsNullOrEmpty(encodingsAccepted)) return;

    encodingsAccepted = encodingsAccepted.ToLowerInvariant();
    var response = filterContext.HttpContext.Response;

    if (encodingsAccepted.Contains("gzip"))
        response.AppendHeader("Content-encoding", "gzip");
        response.Filter = new GZipStream(response.Filter, CompressionMode.Compress);
    else if (encodingsAccepted.Contains("deflate"))
        response.AppendHeader("Content-encoding", "deflate");
        response.Filter = new DeflateStream(response.Filter, CompressionMode.Compress);



  1. How do I enable gzip compression when using MVC3 on IIS7
  2. URL Compression
  3. GZip/Deflate Compression in ASP.NET MVC
Written on August 13, 2015