■ ExceptionHandlerExtensions 클래스의 UseExceptionHandler 확장 메소드에서 예외 처리기 람다식을 사용하는 방법을 보여준다.
▶ Properties/launchSettings.json
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{ "iisSettings" : { "windowsAuthentication" : false, "anonymousAuthentication" : true, "iisExpress" : { "applicationUrl" : "http://localhost:11944", "sslPort" : 44399 } }, "profiles" : { "IIS Express" : { "commandName" : "IISExpress", "launchBrowser" : true, "environmentVariables" : { "ASPNETCORE_ENVIRONMENT" : "Production" } }, "TestProject" : { "commandName" : "Project", "launchBrowser" : true, "applicationUrl" : "https://localhost:5001;http://localhost:5000", "environmentVariables" : { "ASPNETCORE_ENVIRONMENT" : "Production" } } } } |
▶ Startup.cs
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using Microsoft.AspNetCore.Builder; using Microsoft.AspNetCore.Diagnostics; using Microsoft.AspNetCore.Hosting; using Microsoft.AspNetCore.Http; using Microsoft.Extensions.Configuration; using Microsoft.Extensions.DependencyInjection; using Microsoft.Extensions.Hosting; using System.IO; 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.AddRazorPages(); } #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) { if(environment.IsDevelopment()) { app.UseDeveloperExceptionPage(); } else { app.UseExceptionHandler ( builder => { builder.Run ( async context => { context.Response.StatusCode = 500; context.Response.ContentType = "text/html"; await context.Response.WriteAsync("<html lang=\"en\"><body>\r\n"); await context.Response.WriteAsync("ERROR!<br><br>\r\n"); IExceptionHandlerPathFeature feature = context.Features.Get<IExceptionHandlerPathFeature>(); if(feature?.Error is FileNotFoundException) { await context.Response.WriteAsync("File error thrown!<br><br>\r\n"); } else { await context.Response.WriteAsync("Error thrown!<br><br>\r\n"); } await context.Response.WriteAsync("<a href=\"/\">Home</a><br>\r\n"); await context.Response.WriteAsync("</body></html>\r\n"); await context.Response.WriteAsync(new string(' ', 512)); // IE Padding } ); } ); app.UseHsts(); } app.UseHttpsRedirection(); app.UseStaticFiles(); app.UseRouting(); app.UseAuthorization(); app.UseEndpoints ( endpoints => { endpoints.MapRazorPages(); } ); } #endregion } } |
▶ Pages/Index.cshtml.cs
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using Microsoft.AspNetCore.Mvc.RazorPages; using System; namespace TestProject.Pages { /// <summary> /// 인덱스 모델 /// </summary> public class IndexModel : PageModel { //////////////////////////////////////////////////////////////////////////////////////////////////// Method ////////////////////////////////////////////////////////////////////////////////////////// Public #region GET 요청시 처리하기 - OnGet() /// <summary> /// GET 요청시 처리하기 /// </summary> public void OnGet() { throw new Exception(); } #endregion } } |
