[C#/ASP.NET MVC/.NETCORE] MapWhenExtensions 클래스 : MapWhen 확장 메소드를 사용해 조건을 만족하는 요청 경로에 대해 미들웨어 파이프라인 분기하기

TestProject.zip

다운로드

▶ Startup.cs

using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Http;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;
using Microsoft.Extensions.Primitives;

namespace TestProject
{
    /// <summary>
    /// 시작
    /// </summary>
    public class Startup
    {
        //////////////////////////////////////////////////////////////////////////////////////////////////// Property
        ////////////////////////////////////////////////////////////////////////////////////////// Public

        #region 구성 - Configuration

        /// <summary>
        /// 구성
        /// </summary>
        public IConfiguration Configuration { get; }

        #endregion

        //////////////////////////////////////////////////////////////////////////////////////////////////// Constructor
        ////////////////////////////////////////////////////////////////////////////////////////// Public

        #region 생성자 - Startup(configuration)

        /// <summary>
        /// 생성자
        /// </summary>
        /// <param name="configuration">구성</param>
        public Startup(IConfiguration configuration)
        {
            Configuration = configuration;
        }

        #endregion

        //////////////////////////////////////////////////////////////////////////////////////////////////// Method
        ////////////////////////////////////////////////////////////////////////////////////////// Public

        #region 서비스 컬렉션 구성하기 - ConfigureServices(services)

        /// <summary>
        /// 서비스 컬렉션 구성하기
        /// </summary>
        /// <param name="services">서비스 컬렉션</param>
        public void ConfigureServices(IServiceCollection services)
        {
            services.AddControllersWithViews();
        }

        #endregion
        #region 구성하기 - Configure(app, environment)

        /// <summary>
        /// 구성하기
        /// </summary>
        /// <param name="app">애플리케이션 빌더</param>
        /// <param name="environment">웹 호스트 환경</param>
        public void Configure(IApplicationBuilder app, IWebHostEnvironment environment)
        {
            app.MapWhen
            (
                context => context.Request.Query.ContainsKey("branch"),
                ProcessRequestPath
            );

            app.Run
            (
                async context =>
                {
                    await context.Response.WriteAsync("Hello from non-Map delegate.");
                }
            );
        }

        #endregion

        ////////////////////////////////////////////////////////////////////////////////////////// Private

        #region 요청 경로 처리하기 - ProcessRequestPath(app)

        /// <summary>
        /// 요청 경로 처리하기
        /// </summary>
        /// <param name="app">애플리케이션 빌더</param>
        private void ProcessRequestPath(IApplicationBuilder app)
        {
            app.Run
            (
                async context =>
                {
                    StringValues branchStringValues = context.Request.Query["branch"];

                    await context.Response.WriteAsync($"Branch used = {branchStringValues}");
                }
            );
        }

        #endregion
    }
}