.net Core管道处理模型中创建自己的中间件

 .net Core管道处理模型中可以包含N个中间件，咱们可以构建自己的中间件并在其中处理HttpConetxt请求上下文；例如：记录请求日志，权限过滤，记录请求-响应耗时时间，缓存数据 等。

如下图：

代码如下 ：

在Startup类中的Configure函数中使用：app.UseHttpProcess();

 public static class HttpMiddle
    {
        public static IApplicationBuilder UseHttpProcess(this IApplicationBuilder app)
        {
            app.Use(HttpProcessDelegate);
            return app;
        }

        private static RequestDelegate HttpProcessDelegate(RequestDelegate requestDelegate)
        {
            return async t =>
            {
                await HttpRequestProcess(t);
                await requestDelegate.Invoke(t);
                await HttpResponseProcess(t);
            };
        }
        /// <summary>
        /// HttpContext请求处理
        /// </summary>
        /// <param name="httpContext"></param>
        /// <returns></returns>
        private static async Task HttpRequestProcess(HttpContext httpContext)
        {
            httpContext.Request.Headers.Add("name", "小熊");
        }

        /// <summary>
        /// HttpContext响应处理
        /// </summary>
        /// <param name="httpContext"></param>
        /// <returns></returns>
        private static async Task HttpResponseProcess(HttpContext httpContext)
        {
            await httpContext.Response.WriteAsync("11111111111111111");
        }
    }