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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Owin;
using Microsoft.Owin.Hosting;
using Microsoft.Owin;
using System.IO;
namespace KatanaConsole
{
    // use an alias for the OWiN AppFunc
    using AppFunc = Func<IDictionary<string, object>, Task>;
    class Program
    {
        static void Main(string[] args)
        {
            WebApp.Start<Startup>("http://localhost:4321");
            Console.WriteLine("Server Started; Press enter to Quit");
            Console.ReadKey();
        }
    }
    public class Startup
    {
        public void Configuration(IAppBuilder app)
        {
            var middleware = new Func<AppFunc, AppFunc>(MyMiddleWare);
            app.Use(middleware);
        }
        public AppFunc MyMiddleWare(AppFunc next)
        {
            AppFunc appFunc = async (IDictionary<string, object> environment) =>
            {
                // Do something with the incoming request:
                var response = environment["owin.ResponseBody"] as Stream;
                using (var writer = new StreamWriter(response))
                {
                    await writer.WriteAsync("<h1>Hello First Middleware</h1>");
                }
                // Call the next Middleware in the chain:
                await next.Invoke(environment);
            };
            return appFunc;
        }
    }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Owin;
using Microsoft.Owin.Hosting;
using Microsoft.Owin;
using System.IO;
namespace KatanaConsole
{
    // use an alias for the OWiN AppFunc
    using AppFunc = Func<IDictionary<string, object>, Task>;
    class Program
    {
        static void Main(string[] args)
        {
            WebApp.Start<Startup>("http://localhost:4321");
            Console.WriteLine("Server Started; Press enter to Quit");
            Console.ReadKey();
        }
    }
    public class Startup
    {
        public void Configuration(IAppBuilder app)
        {
            var middleware = new Func<AppFunc, AppFunc>(MyMiddleWare);
            var otherMiddleware = new Func<AppFunc, AppFunc>(MyOtherMiddleWare);

            app.Use(middleware);
            app.Use(otherMiddleware);
        }
        public AppFunc MyMiddleWare(AppFunc next)
        {
            AppFunc appFunc = async (IDictionary<string, object> environment) =>
            {
                // Do something with the incoming request:
                var response = environment["owin.ResponseBody"] as Stream;
                using (var writer = new StreamWriter(response))
                {
                    await writer.WriteAsync("<h1>Hello First Middleware</h1>");
                }
                // Call the next Middleware in the chain:
                // await next.Invoke(environment);
            };
            return appFunc;
        }
        public AppFunc MyOtherMiddleWare(AppFunc next)
        {
            AppFunc appFunc = async (IDictionary<string, object> environment) =>
            {
                // Do something with the incoming request:
                var response = environment["owin.ResponseBody"] as Stream;
                using (var writer = new StreamWriter(response))
                {
                    await writer.WriteAsync("<h1>Hello Second Middleware</h1>");
                }
                // Call the next Middleware in the chain:
                await next.Invoke(environment);
            };
            return appFunc;
        }
    }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Owin;
using Microsoft.Owin.Hosting;
using Microsoft.Owin;
using System.IO;
namespace KatanaConsole
{
    // use an alias for the OWiN AppFunc
    using AppFunc = Func<IDictionary<string, object>, Task>;
    class Program
    {
        static void Main(string[] args)
        {
            WebApp.Start<Startup>("http://localhost:4321");
            Console.WriteLine("Server Started; Press enter to Quit");
            Console.ReadKey();
        }
    }
    public class Startup
    {
        public void Configuration(IAppBuilder app)
        {
            var middleware = new Func<AppFunc, AppFunc>(MyMiddleWare);
            var otherMiddleware = new Func<AppFunc, AppFunc>(MyOtherMiddleWare);

            app.Use(middleware);
            app.Use(otherMiddleware);
        }
        public AppFunc MyMiddleWare(AppFunc next)
        {
            AppFunc appFunc = async (IDictionary<string, object> environment) =>
            {
                // Do something with the incoming request:
                var response = environment["owin.ResponseBody"] as Stream;
                using (var writer = new StreamWriter(response))
                {
                    await writer.WriteAsync("<h1>Hello First Middleware</h1>");
                }
                // Call the next Middleware in the chain:
                await next.Invoke(environment);
            };
            return appFunc;
        }
        public AppFunc MyOtherMiddleWare(AppFunc next)
        {
            AppFunc appFunc = async (IDictionary<string, object> environment) =>
            {
                // Do something with the incoming request:
                var response = environment["owin.ResponseBody"] as Stream;
                using (var writer = new StreamWriter(response))
                {
                    await writer.WriteAsync("<h1>Hello Second Middleware</h1>");
                }
                // Call the next Middleware in the chain:
                await next.Invoke(environment);
            };
            return appFunc;
        }
    }
}