public override void OnActionExecuting(ActionExecutingContext filterContext)
        {
            var request  = filterContext.RequestContext.HttpContext.Request;
            var response = filterContext.RequestContext.HttpContext.Response;

            //Format the request url without querystring
            var urlString = request.Url.ToString();

            if (!string.IsNullOrEmpty(request.Url.Query))
            {
                urlString = urlString.Replace(request.Url.Query, "");
            }
            var url    = new Uri(urlString);
            var webres = new WebResourceInfo(url);

            if (webres.IsFile)
            {
                var noneMatch  = request.Headers["If-None-Match"];
                var isNotMatch = true;
                if (!string.IsNullOrEmpty(noneMatch))
                {
                    var service    = DependencyResolver.Current.GetService <INetDriveService>();
                    var file       = service.MapPath(url);
                    var etagHashed = GetEtag(file);
                    isNotMatch = !noneMatch.Equals(etagHashed);
                }

                var isExpried = !(request.Headers["If-Modified-Since"] != null && TimeSpan.FromTicks(DateTime.Now.Ticks - DateTime.Parse(request.Headers["If-Modified-Since"]).Ticks).Seconds < Duration);

                if (!isNotMatch && !isExpried)
                {
                    try
                    {
                        response.Write(DateTime.Now);
                        response.StatusCode = 304;
                        response.Headers.Add("Content-Encoding", "gzip");
                        response.StatusDescription = "Not Modified";
                    }
                    catch //(System.PlatformNotSupportedException e)
                    {
                        base.OnActionExecuting(filterContext);
                    }
                }
                else
                {
                    base.OnActionExecuting(filterContext);
                }
            }
            else
            {
                base.OnActionExecuting(filterContext);
            }
        }
        public override void OnActionExecuting(ActionExecutingContext filterContext)
        {
            var request = filterContext.RequestContext.HttpContext.Request;
            var response = filterContext.RequestContext.HttpContext.Response;

            //Format the request url without querystring
            var urlString = request.Url.ToString();
            if (!string.IsNullOrEmpty(request.Url.Query))
                urlString = urlString.Replace(request.Url.Query, "");
            var url = new Uri(urlString);
            var webres = new WebResourceInfo(url);

            if (webres.IsFile)
            {
                var noneMatch = request.Headers["If-None-Match"];
                var isNotMatch =true;
                if (!string.IsNullOrEmpty(noneMatch))
                {
                    var service = DependencyResolver.Current.GetService<INetDriveService>();
                    var file = service.MapPath(url);
                    var etagHashed = GetEtag(file);
                    isNotMatch =  !noneMatch.Equals(etagHashed);
                }

                var isExpried=!(request.Headers["If-Modified-Since"] != null && TimeSpan.FromTicks(DateTime.Now.Ticks - DateTime.Parse(request.Headers["If-Modified-Since"]).Ticks).Seconds < Duration);

                if (!isNotMatch && !isExpried)
                {
                    try
                    {
                        response.Write(DateTime.Now);
                        response.StatusCode = 304;
                        response.Headers.Add("Content-Encoding", "gzip");
                        response.StatusDescription = "Not Modified";
                    }
                    catch //(System.PlatformNotSupportedException e)
                    {
                        base.OnActionExecuting(filterContext);
                    }
                }
                else
                {
                    base.OnActionExecuting(filterContext);
                }
            }
            else
                base.OnActionExecuting(filterContext);
        }