增加ASP.NET CORE中间件模板及基类

Falcon.SugarApi/ApiDefinistions/Middleware/MiddlewareBase.cs

@@ -0,0 +1,53 @@
+using Microsoft.AspNetCore.Http;
+using System.Threading.Tasks;
+
+namespace Falcon.SugarApi.ApiDefinistions.Middleware
+{
+    /// <summary>
+    /// ASP.NET CORE 中间件基类，模板类
+    /// </summary>
+    public abstract class MiddlewareBase
+    {
+        /// <summary>
+        /// 下一步请求
+        /// </summary>
+        private readonly RequestDelegate Next;
+
+        /// <summary>
+        /// 构造中间件
+        /// </summary>
+        /// <param name="next">下一步</param>
+        protected MiddlewareBase(RequestDelegate next) {
+            Next = next;
+        }
+
+        /// <summary>
+        /// 执行中间件
+        /// </summary>
+        /// <param name="context">HttpContext</param>
+        /// <returns>任务</returns>
+        public virtual async Task InvokeAsync(HttpContext context) {
+            await BeforeNext(context);
+            await this.Next(context);
+            await AfterNext(context);
+        }
+
+        /// <summary>
+        /// 在下一步之前执行的代码。由InvokeAsync调用
+        /// </summary>
+        /// <param name="context">HttpContext</param>
+        /// <returns>任务</returns>
+        public virtual async Task BeforeNext(HttpContext context) {
+            await Task.CompletedTask;
+        }
+
+        /// <summary>
+        /// 在下一步之后执行的代码。由InvokeAsync调用
+        /// </summary>
+        /// <param name="context">HttpContext</param>
+        /// <returns>任务</returns>
+        public virtual async Task AfterNext(HttpContext context) {
+            await Task.CompletedTask;
+        }
+    }
+}