/// <summary>
    /// 響應時間的中間件
    /// </summary>
    public class ResponseTimeMiddleware
    {
        private readonly RequestDelegate _next;
        public ResponseTimeMiddleware(RequestDelegate next)
        {
            _next = next;
        }

        public async Task Invoke(HttpContext context)
        {
            Stopwatch sw = new Stopwatch();
            sw.Start();
            Console.WriteLine("ResponseTimeMiddleware...");
            await _next.Invoke(context);
            sw.Stop();
            Console.WriteLine($"頁(ye)面(mian)響應時間(jian)為(wei)：{sw.ElapsedMilliseconds}ms");
        }

    }

    /// <summary>
    /// Lind.DotNetCore.Middleware擴(kuo)展方法
    /// </summary>
    public static class MiddlewareExtensions
    {
        public static IApplicationBuilder UseResponseTime(this IApplicationBuilder builder)
        {
            return builder.UseMiddleware<ResponseTimeMiddleware>();
        }

        public static IApplicationBuilder UseRequestKey(this IApplicationBuilder builder)
        {
            return builder.UseMiddleware<RequestKeyMiddleware>();
        }

        public static IApplicationBuilder UseAuthorizationOperation(this IApplicationBuilder builder)
        {
            return builder.UseMiddleware<AuthorizationOperationMiddleware>();
        }

    }

        public void Configure(IApplicationBuilder app, IHostingEnvironment env)
        {
            if (env.IsDevelopment())
            {
                app.UseDeveloperExceptionPage();
            }
            app.UseAuthorizationOperation();
            app.UseResponseTime();
            app.UseRequestKey();
            app.UseStaticHttpContext();
            app.UseMvc();