如何获取.NET WebAPI调用的已用时间

Question

如何.NET WebAPI在C#中获取呼叫的已用时间？

我需要这些信息用于我的日志文件

我可以轻松地DateTime.Now()在api调用之前和之后做一个,但是,如果已经有一些东西......让我们使用它!

Answer 1

你可以使用过滤器

using System;
using System.Diagnostics;
using System.Net.Http;
using System.Web.Http.Controllers;
using System.Web.Http.Filters;
using System.Web.Mvc;

namespace Cludo.App.Utility
{
    /// <summary>
    /// Used to log requests to server
    /// </summary>
    [AttributeUsage(AttributeTargets.Class, AllowMultiple = false, Inherited = true)]
    public class LogActionRequestsAttribute : ActionFilterAttribute
    {
        public LogActionRequestsAttribute()
        {
             //You can inject to constructors ILog or what ever
        }

        public static Stopwatch GetTimer(HttpRequestMessage request)
        {
            const string key = "__timer__";
            if (request.Properties.ContainsKey(key))
            {
                return (Stopwatch)request.Properties[key];
            }

            var result = new Stopwatch();
            request.Properties[key] = result;
            return result;
        }

        public override void OnActionExecuting(HttpActionContext actionContext)
        {

            var timer = GetTimer(actionContext.Request);
            timer.Start();
            base.OnActionExecuting(actionContext);
        }


        public override void OnActionExecuted(HttpActionExecutedContext actionExecutedContext)
        {
            base.OnActionExecuted(actionExecutedContext);
            var timer = GetTimer(actionExecutedContext.Request);
            timer.Stop();
            var totalTime = timer.ElapsedMilliseconds;            
        }
    }
}

然后在webapi配置中

config.Filters.Add(
                (LogActionRequestsAttribute)
                    GlobalConfiguration.Configuration.DependencyResolver.GetService(typeof (LogActionRequestsAttribute)));

AttributeUsage阻止调用属性两次.但我认为其他选项可能是你写http模块使用开始,结束请求事件,这可能是最好和精确的测量,在我的应用程序中它足以使用属性,因为几毫秒对我​​来说不会有什么大不了的