在ASP.NET MVC下限制同一个IP地址单位时间间隔内的请求次数的解决方法

//check if limit is reached 
if (rateLimit > 0 && throttleCounter.TotalRequests > rateLimit)
{
  //log blocked request
  if (Logger != null) Logger.Log(ComputeLogEntry(requestId, identity, throttleCounter, rateLimitPeriod.ToString(), rateLimit, filterContext.HttpContext.Request));
  //break execution and return 409 
  var message = string.IsNullOrEmpty(QuotaExceededMessage) ?
  "HTTP request quota exceeded! maximum admitted {0} per {1}" : QuotaExceededMessage;
  //add status code and retry after x seconds to response
  filterContext.HttpContext.Response.StatusCode = (int)QuotaExceededResponseCode;
  filterContext.HttpContext.Response.Headers.Set("Retry-After", RetryAfterFrom(throttleCounter.Timestamp, rateLimitPeriod));
  filterContext.Result = QuotaExceededResult(
  filterContext.RequestContext,
  string.Format(message, rateLimit, rateLimitPeriod),
  QuotaExceededResponseCode,
  requestId);
  return;
}

//check if limit is reached 
if (rateLimit > 0 && throttleCounter.TotalRequests > rateLimit)
{
filterContext.HttpContext.Response.Redirect("/Error.html");                               
return;
}  

public class FilterConfig 
    {
        public static void RegisterGlobalFilters(GlobalFilterCollection filters)
        {
            var throttleFilter = new ThrottlingFilter
            {
                Policy = new ThrottlePolicy(perSecond: 1, perMinute: 10, perHour: 60 * 10, perDay: 600 * 10)
                {
                    IpThrottling = true
                },
                Repository = new CacheRepository()
            };
            filters.Add(throttleFilter);
        }
    }

public class HomeController : Controller 
    {
        public ActionResult Index()
        {
            return View();
        }
        [EnableThrottling(PerSecond = 2, PerMinute = 5, PerHour = 30, PerDay = 300)]
        public ActionResult Other()
        {
            return View();
        }
        [HttpPost]
        [EnableThrottling(PerSecond = 2, PerMinute = 5, PerHour = 30, PerDay = 300)]
        public ActionResult GetSth()
        {
            return Json(new {msg=true});
        }
    }      

@{ 
    ViewBag.Title = "Index";
    Layout = "~/Views/Shared/_Layout.cshtml";
}
<h2>Index</h2>
<input type="button" id="btn" value="请求"/>
@section scripts
{
    <script type="text/javascript">
        $(function() {
            $('#btn').on("click", function() {
                $.post('@Url.Action("GetSth")',function(data) {
                    if (data.msg) {
                        alert("请求成功一次");
                    } else {
                        alert("请求次数过多");
                    }
               });
           });
        });
    </script>
}

@{ 
    ViewBag.Title = "Other";
    Layout = "~/Views/Shared/_Layout.cshtml";
}
<h2>Other</h2>