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using Microsoft.AspNetCore.Hosting; //IWebHostBuilder using Microsoft.AspNetCore.Builder; //IApplicationBuilder using Microsoft.AspNetCore.Http; //WriteAsync using Microsoft.AspNetCore; //webHost using System.IO; using System.Threading.Tasks; namespace WebApplication1 { public class Startup { public void Configure(IApplicationBuilder app) { app.UseMiddleware<TerminalMiddleware>(); } } //A middleware class in ASP.NET Core is simply a class that // - Take a constructor with RequestDelegate // - implements Invoke method taking HttpContext and returning Task //If you take a look at this code, it cannot be any simpler. //This is a terminal middleware. It does not invoke the subsequent middleware. It just returns its own response and that's it. public class TerminalMiddleware { public TerminalMiddleware(RequestDelegate next) { //We are not using the parameter next in this middleware since this middleware is terminal } public async Task Invoke(HttpContext context) { await context.Response.WriteAsync("Hello world"); } } public class Program { public static void Main(string[] args) { CreateWebHostBuilder(args).Build().Run(); } public static IWebHostBuilder CreateWebHostBuilder(string[] args) => WebHost.CreateDefaultBuilder(args) .UseStartup<Startup>() .UseEnvironment("Development"); } } |
결과 : Hello world