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Creamos un ActionFilter
public class CompressAttribute : ActionFilterAttribute
{
public override void OnActionExecuting(ActionExecutingContext filterContext)
{
if (filterContext.IsChildAction) return;
var acceptEncoding = filterContext.HttpContext.Request.Headers["Accept-Encoding"];
if (!string.IsNullOrEmpty(acceptEncoding))
{
acceptEncoding = acceptEncoding.ToLower();
var response = filterContext.HttpContext.Response;
if (acceptEncoding.Contains("gzip"))
{
response.AppendHeader("Content-encoding", "gzip");
response.Filter = new GZipStream(response.Filter, CompressionMode.Compress);
}
else if (acceptEncoding.Contains("deflate"))
{
response.AppendHeader("Content-encoding", "deflate");
response.Filter = new DeflateStream(response.Filter, CompressionMode.Compress);
}
}
}
}
Añadimos al RegisterGlobalFilters del Global.asax
filters.Add(new CompressAttribute());
