■ UseWhenExtensions 클래스의 UseWhen 확장 메소드를 사용해 조건부 미들웨어 대리자를 추가하는 방법을 보여준다.
▶ Startup.cs
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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.Logging; 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, logger) /// <summary> /// 구성하기 /// </summary> /// <param name="app">애플리케이션 빌더</param> /// <param name="environment">웹 호스트 환경</param> /// <param name="logger">로그 기록기</param> public void Configure(IApplicationBuilder app, IWebHostEnvironment environment, ILogger<Startup> logger) { app.UseWhen ( context => context.Request.Query.ContainsKey("branch"), app2 => { app2.Use ( async (context, next) => { var branchVer = context.Request.Query["branch"]; logger.LogInformation("Branch used = {branchVer}", branchVer); await next(); } ); } ); app.Run ( async context => { await context.Response.WriteAsync("Hello from main pipeline."); } ); } #endregion } } |
