[C#/TPL/.NET5] CancellationTokenSource 클래스 : CancelAfter 메소드를 사용해 타임아웃시 작업 취소하기

TestProject.zip

0.00MB

▶ Program.cs

using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Net.Http;
using System.Threading;
using System.Threading.Tasks;

namespace TestProject
{
    /// <summary>
    /// 프로그램
    /// </summary>
    class Program
    {
        //////////////////////////////////////////////////////////////////////////////////////////////////// Field
        ////////////////////////////////////////////////////////////////////////////////////////// Static
        //////////////////////////////////////////////////////////////////////////////// Private

        #region Field

        /// <summary>
        /// 취소 토큰 소스
        /// </summary>
        private static CancellationTokenSource _cancellationTokenSource = new CancellationTokenSource();

        /// <summary>
        /// HTTP 클라이언트
        /// </summary>
        private static HttpClient _httpClient = new HttpClient
        {
            MaxResponseContentBufferSize = 1000000L
        };

        /// <summary>
        /// URL 리스트
        /// </summary>
        private static List<string> _urlList = new List<string>
        {
            "https://docs.microsoft.com",
            "https://docs.microsoft.com/aspnet/core",
            "https://docs.microsoft.com/azure",
            "https://docs.microsoft.com/azure/devops",
            "https://docs.microsoft.com/dotnet",
            "https://docs.microsoft.com/dynamics365",
            "https://docs.microsoft.com/education",
            "https://docs.microsoft.com/enterprise-mobility-security",
            "https://docs.microsoft.com/gaming",
            "https://docs.microsoft.com/graph",
            "https://docs.microsoft.com/microsoft-365",
            "https://docs.microsoft.com/office",
            "https://docs.microsoft.com/powershell",
            "https://docs.microsoft.com/sql",
            "https://docs.microsoft.com/surface",
            "https://docs.microsoft.com/system-center",
            "https://docs.microsoft.com/visualstudio",
            "https://docs.microsoft.com/windows",
            "https://docs.microsoft.com/xamarin"
        };

        #endregion

        //////////////////////////////////////////////////////////////////////////////////////////////////// Method
        ////////////////////////////////////////////////////////////////////////////////////////// Static
        //////////////////////////////////////////////////////////////////////////////// Private

        #region 컨텐트 길이 구하기 (비동기) - GetContentLengthAsync(httpClient, url, cancellationToken)

        /// <summary>
        /// 컨텐트 길이 구하기 (비동기)
        /// </summary>
        /// <param name="httpClient">HTTP 클라이언트</param>
        /// <param name="url">URL</param>
        /// <param name="cancellationToken">취소 토큰</param>
        /// <returns>컨텐트 길이 태스크</returns>
        private static async Task<int> GetContentLengthAsync(HttpClient httpClient, string url, CancellationToken cancellationToken)
        {
            HttpResponseMessage httpResponseMessage = await httpClient.GetAsync(url, cancellationToken);

            byte[] contentByteArray = await httpResponseMessage.Content.ReadAsByteArrayAsync(cancellationToken);

            Console.WriteLine($"{url, -60} {contentByteArray.Length, 10:#,#}");

            return contentByteArray.Length;
        }

        #endregion
        #region 전체 컨텐트 길이 출력하기 (비동기) - PrintTotalContentLengthAsync()

        /// <summary>
        /// 전체 컨텐트 길이 출력하기 (비동기)
        /// </summary>
        /// <returns>태스크</returns>
        private static async Task PrintTotalContentLengthAsync()
        {
            Stopwatch watch = Stopwatch.StartNew();

            int totalLength = 0;

            foreach(string url in _urlList)
            {
                int contentLength = await GetContentLengthAsync(_httpClient, url, _cancellationTokenSource.Token);

                totalLength += contentLength;
            }

            watch.Stop();

            Console.WriteLine($"전체 바이트 : {totalLength:#,#}");
            Console.WriteLine($"경과 시간   : {watch.Elapsed}");
        }

        #endregion
        #region 프로그램 시작하기 - Main()

        /// <summary>
        /// 프로그램 시작하기
        /// </summary>
        /// <returns>태스크</returns>
        private static async Task Main()
        {
            Console.WriteLine("프로그램을 시작합니다.");

            try
            {
                _cancellationTokenSource.CancelAfter(3000);

                await PrintTotalContentLengthAsync();
            }
            catch(TaskCanceledException)
            {
                Console.WriteLine("태스크가 취소되었습니다 : 타임아웃");
            }
            finally
            {
                _cancellationTokenSource.Dispose();
            }

            Console.WriteLine("프로그램을 종료합니다.");
        }

        #endregion
    }
}