asp.net-mvc - Asp.net Mvc OutputCache 属性和滑动过期

Question

打电话

http://foo/home/cachetest

为了

[UrlRoute(Path = "home/cachetest")]
[OutputCache(Duration = 10, VaryByParam = "none")]
public ActionResult CacheTest()
{
    return Content(DateTime.Now.ToString());
}

无论我刷新页面的频率如何，都会每 10 秒显示相同的内容。

是否可以轻松添加滑动过期时间，以便在我刷新页面的情况下 10 秒后不会更改？

Answer 1

您可以创建一个自定义缓存过滤器而不是默认的 OutputCache 过滤器。像下面这样，请注意可以在此处设置滑动到期时间。需要注意的是，我没有将它用于滑动到期，但适用于其他事情。

public class CacheFilterAttribute : ActionFilterAttribute
    {
        private const int Second = 1;
        private const int Minute = 60 * Second;
        private const int Hour = 60 * Minute;
        public const int SecondsInDay = Hour * 24;


        /// <summary>
        /// Gets or sets the cache duration in seconds. 
        /// The default is 10 seconds.
        /// </summary>
        /// <value>The cache duration in seconds.</value>
        public int Duration
        {
            get;
            set;
        }

        public int DurationInDays
        {
            get { return Duration / SecondsInDay; }
            set { Duration = value * SecondsInDay; }
        }

        public CacheFilterAttribute()
        {
            Duration = 10;
        }

        public override void OnActionExecuted(
                               ActionExecutedContext filterContext)
        {
            if (Duration <= 0) return;

            HttpCachePolicyBase cache = 
                     filterContext.HttpContext.Response.Cache;
            TimeSpan cacheDuration = TimeSpan.FromSeconds(Duration);

            cache.SetCacheability(HttpCacheability.Public);
            cache.SetExpires(DateTime.Now.Add(cacheDuration));
            cache.SetMaxAge(cacheDuration);
            cache.SetSlidingExpiration(true);
            cache.AppendCacheExtension("must-revalidate, proxy-revalidate");
        }
    }