Question

如何在C＃中获取.NET WebAPI电话的已用时间？

我的日志文件需要这样的信息

我可以在api调用之前和之后轻松地执行DateTime.Now()，但是，如果已经有了某些东西......让我们使用它！

Answer 1

您可以使用过滤器

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

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，因为几毫秒不会对我有什么大不了的

Answer 2

如果它对某人有帮助，我在下面添加了适用于 .NET Core 的 Vova 答案的更新版本。

/// <summary>
/// Used to log requests to server
/// </summary>
[AttributeUsage(AttributeTargets.Class, AllowMultiple = false, Inherited = true)]
public class LogActionRequestsAttribute : ActionFilterAttribute
{
    private const string ACTION = "Action";
    private const string RESULT = "Result";

    private static Stopwatch GetTimer(HttpContext context, string type)
    {
        var key = $"__timer__{type}";
        if (context.Items.ContainsKey(key)) return (Stopwatch) context.Items[key];
        var stopWatch = new Stopwatch();
        context.Items[key] = stopWatch;
        return stopWatch;
    }

    public override void OnActionExecuting(ActionExecutingContext context)
    {
        var timer = GetTimer(context.HttpContext, ACTION);
        timer.Start();
        base.OnActionExecuting(context);
    }

    public override void OnActionExecuted(ActionExecutedContext context)
    {
        base.OnActionExecuted(context);
        var timer = GetTimer(context.HttpContext, ACTION);
        timer.Stop();

        var logger = context.HttpContext.RequestServices.GetService<ILogger<LogActionRequestsAttribute>>();
        logger.LogInformation($"{ACTION} call to {context.HttpContext.Request.Path} took {timer.ElapsedMilliseconds} ms");
    }

    public override void OnResultExecuting(ResultExecutingContext context)
    {
        var timer = GetTimer(context.HttpContext, RESULT);
        timer.Start();
        base.OnResultExecuting(context);
    }

    public override void OnResultExecuted(ResultExecutedContext context)
    {
        base.OnResultExecuted(context);
        var timer = GetTimer(context.HttpContext, RESULT);
        timer.Stop();

        var logger = context.HttpContext.RequestServices.GetService<ILogger<LogActionRequestsAttribute>>();
        logger.LogInformation($"{RESULT} call to {context.HttpContext.Request.Path} took {timer.ElapsedMilliseconds} ms");
    }
}

该属性可以直接应用于 ApiController，无需额外注册。

如何获取.NET WebAPI调用的已用时间

2 个答案: