使用过滤器记录api接口访问时长并记录日志

using ERP.Helper;
using ERP.Models.User;
using System;
using System.Diagnostics;
using System.Web;
using System.Web.Http.Controllers;
using System.Web.Http.Filters;
using ActionFilterAttribute = System.Web.Http.Filters.ActionFilterAttribute;
using Logger = ERP.Helper.Log.Logger;

namespace ERP.Services
{
    public class PerformanceActionAttribute : ActionFilterAttribute
    {

        public override void OnActionExecuting(HttpActionContext filterContext)
        {
            //在Action执行前执行
            GetTimer("action").Start();
        }

        public override void OnActionExecuted(HttpActionExecutedContext Context)
        {
            //在Action执行之后执行
            var actionTimer = GetTimer("action");
            actionTimer.Stop();
            var userName = "";
            //var ip = Dns.GetHostEntry(Dns.GetHostName()).AddressList.FirstOrDefault(p => p.AddressFamily.ToString() == "InterNetwork")?.ToString();
            var ip = IpHelper.GetUserIp();
            var url = Context.Request.RequestUri.ToString();
            var extime = actionTimer.ElapsedMilliseconds + "ms";
            Logger.RecordEmailLog(userName,ip,url, extime );

            //在这里显示给用户的时间只是action的执行时间，如果在view中有执行调用代码的部分，则时间不会
            //记录在内，所以这里的时间不是很准，但是这个时间可以很自由的被view中的代码调用显示，使得界面可以按照
            //自己的意愿进行显示
        }

        private Stopwatch GetTimer(string name)
        {
            string key = "__timer__" + name;
            
            if (HttpContext.Current.Items.Contains(key))
            {
                return (Stopwatch)HttpContext.Current.Items[key];
            }

            var result = new Stopwatch();
            HttpContext.Current.Items[key] = result;
            return result;
        }
    }
}