public override void OnActionExecuting(ActionExecutingContext filterContext)
{
var ckey = "APIRATE_" + AppUtils.GetClientIP(filterContext.HttpContext.Request);
var counter = AppCaches.AppGet <RateCounter>(ckey);
if (counter == null)
{
counter = new RateCounter();
AppCaches.AppSet(ckey, counter);
}
if (!counter.IsOverstepSeted)
{
this.Increase(counter);
}
if (counter.IsOverstepSeted)
{
if (AutoResult)
{
filterContext.Result = new ContentResult()
{
Content = "频率太快了，不要刷了"
};
}
else
{
filterContext.Controller.TempData["OUT_COUNT"] = "1";
}
}
}
/// <summary>
/// 在当前频率计数域内为指定计数器递增。
/// </summary>
/// <param name="counter">计数器对象</param>
/// <returns>返回计数递增后，计数器是否超频。</returns>
private bool Increase(RateCounter counter)
{
var result = counter.IsOverstepSeted;
var now = DateTime.Now;
var span = now - counter.TimePoint;
if (span.TotalSeconds >= LimitDuration)
{
counter.Reset(now);
counter.Count = 1;
counter.Overstep = 0;
counter.IsOverstepSeted = false;
}
else
{
++counter.Count;
if (!result && counter.Count > LimitCycleNumber)
{
++counter.Overstep;
counter.Reset(now);
if (counter.Overstep >= LimitOverstep)
{
result = counter.IsOverstepSeted = true;
}
}
}
return(result);
}