第七周作业

using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Net.Http;
using System.Threading;
using System.Threading.Tasks;
namespace PerformanceTest
{
    class Program
    {
        static List<long> ResponseTimeList = new List<long>();//响应时间列表
        public static string ReqURL = "";//请求URL
        public static int ReqTotalNumer = 0;//请求总次数
        public static int ReqConcurrentNumer = 0;//并发数
        public static object ob1 = new object();
        static void Main(string[] args)
        {
            Console.WriteLine("************开始测试Web性能************");
            Console.WriteLine();
            Console.WriteLine("请输入请求URL：");
            ReqURL = Console.ReadLine();
            Console.WriteLine();
            Console.WriteLine("请输入并发用户数（数字）：");
            string strReqConcurrentNumer = Console.ReadLine();
            int.TryParse(strReqConcurrentNumer, out ReqConcurrentNumer);
            Console.WriteLine();
            Console.WriteLine("请输入请求总次数（数字）：");
            string strReqTotalNumer = Console.ReadLine();
            int.TryParse(strReqTotalNumer, out ReqTotalNumer);
            Console.WriteLine();
            PerformanceMethond();//执行测试
            Console.WriteLine("************测试中*********************");
            Console.WriteLine();
            Thread.Sleep(5000);//等待数据写入
            Console.WriteLine("响应时间总条数：" + ResponseTimeList.Count);
            //对结果排序
            ResponseTimeList.Sort((x, y) => x.CompareTo(y));
            #region 平均响应时间
            long AverageTime = 0;
            long TotalTime = 0;
            foreach (long item in ResponseTimeList)
            {
                TotalTime += item;
               // Console.WriteLine("响应时间为：" + item + "ms");
            }
            AverageTime = TotalTime / ReqTotalNumer;
            Console.WriteLine("平均响应时间：" + AverageTime + "ms");
            #endregion
            #region 95%响应时间
            long Per95Time = 0; //95%响应时间; 100个请求时，按响应时间倒序排列，取第95个响应时间值；1000个请求时，按响应时间倒序排列，取第950-959个响应时间值的平均数
            int Min95 = (Int32)Math.Floor((double)ReqTotalNumer * 0.95);
            int Max95 = (Int32)Math.Ceiling((double)ReqTotalNumer * 0.96);
            long TotalTime95 = 0;//95%响应时间的总时间
            int Count95 = 0;//95%响应时间的总条数
            for (int i = Min95; i < Max95; i++)
            {
                TotalTime95 += ResponseTimeList[i];
                Count95++;
            }
            Per95Time =(long)(TotalTime95 / Count95);
            Console.WriteLine("95%响应时间：" + Per95Time + "ms");
            #endregion
            Console.ReadKey();
        }
        /// <summary>
        /// 性能测试方法
        /// 并发数ReqConcurrentNumer
        /// 总请求次数ReqTotalNumer
        /// </summary>
        public static void PerformanceMethond()
        {
            //并发数10 ，进行请求
            List<string> ConcurrentList = new List<string>();
            for (int i = 0; i < ReqConcurrentNumer; i++)
            {
                ConcurrentList.Add("Request" + i);
            }
            Parallel.ForEach<String>(ConcurrentList, (item) =>
            {
                //Console.WriteLine(item);
                RequestMethodAsync(ReqURL);
            });
        }
        /// <summary>
        /// 单次请求的方法
        /// </summary>
        /// <returns></returns>
        //public static async void RequestMethodAsync(object URL)
        public static void RequestMethodAsync(string URL)
        {
            int PerNumber = ReqTotalNumer / ReqConcurrentNumer;
            for (int i = 0; i < PerNumber; i++)
            {
                var stopwatch = new Stopwatch();
                stopwatch.Start();
                HttpClient client = new HttpClient();
                //await client.GetStringAsync(URL.ToString());
                client.GetStringAsync(URL);
                stopwatch.Stop();
                //防止锁住，添加数据失败
                lock (ob1)
                {
                    ResponseTimeList.Add(stopwatch.ElapsedMilliseconds);
                }
                //Console.WriteLine("当前线程ID" + Thread.CurrentThread.ManagedThreadId + "，响应时间为：" + stopwatch.ElapsedMilliseconds + "ms");
            }
        }
    }
}