[Asp.Net Core]Resource扩展定制支持缓存

Posted 2022-01-05 厦门德仔

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ResourceFilter

就是为了缓存而存在。。。

之前在ActionFilter 需执行controller实列化。ResourceFilter 则不需要。这样可以减少性能损失，提高效率。

CustomResourceFilterAttribute

public class CustomResourceFilterAttribute : Attribute, IResourceFilter
    

        private static Dictionary<string, object> CacheDictionary = new Dictionary<string, object>();
        /// <summary>
        /// 在XX资源之前
        /// </summary>
        /// <param name="context"></param>
        public void OnResourceExecuting(ResourceExecutingContext context)
        
            string key = context.HttpContext.Request.Path;
            if (CacheDictionary.Any(item => item.Key == key))
            
                //断路器，只要是对Result赋值，就不继续往后走了；
                context.Result = CacheDictionary[key] as IActionResult;
            
                Console.WriteLine("CustomResourceFilterAttribute.OnResourceExecuting");
        
        /// <summary>
        /// 在xx资源之后
        /// </summary>
        /// <param name="context"></param>
        public void OnResourceExecuted(ResourceExecutedContext context)
        
            //到了这里，肯定已经完成了计算了；
            string key = context.HttpContext.Request.Path;
            CacheDictionary[key] = context.Result;
            Console.WriteLine("CustomResourceFilterAttribute.OnResourceExecuted");

Controller

        [CustomResourceFilter]
        public IActionResult IndexResourceTest() 
        
            ViewBag.Date = DateTime.Now;
            return View();