日常web开发中,我们修改了js、css等静态资源文件后,如果文件名不变的话,客户端浏览并不会及时获取最新的资源文件,这就很尴尬了
怎么办呢?
1.小白:让客户清除缓存?,No ,不靠谱
2.初级:把文件名改了?,可以,但我们产品样式一天更新8百次,怎么办?不方便
<link href="/css/old.css"rel="stylesheet"type="text/css" /> <link href="/css/new.css"rel="stylesheet"type="text/css" />... <link href="/css/new800.css"rel="stylesheet"type="text/css" />
3.中级:加版本号?,可以,但这个文件,我们有好几个地方用,版本号都加的乱咯? 不方便
<link href="/css/active.css?v=20181120"rel="stylesheet"type="text/css" />
4.中高级:自己搞个,一处配置多处更新,.net版舒服
利用json的键值特性, 此处仅用js,css举例,其他图片等静态资源,都可以使用
一、 新建json文件 CssJsVersion.json
{ //请添加需要刷新的js或css文件 //说明:"键值": "指向文件" //"css/common.css": "css/common_20170223.css" "pc/css/common.css": "pc/css/common.css?v=20170829001", "pc/css/active.css": "pc/css/active.css?v=20180620001", "pc/js/GasgooJS.common.base.js": "pc/js/GasgooJS.common.base.js?v=20170816001", "pc/js/event.js": "pc/js/event.js?v=20180508001", "pc/js/events.js": "pc/js/events.js?v=20180111007", "pc/js/masterpage.js": "pc/js/masterpage.js?v=20170918001", "pc/js/home.js": "pc/js/home.js?v=20171013001", "pc/js/af.js": "pc/js/af.js?v=20180810", "wap/css/common.css": "wap/css/common.css?v=20171222001", "wap/css/active.css": "wap/css/active.css?v=20171228001", "wap/css/css.css": "wap/css/css.css?v=20180813001", "wap/js/events.js": "wap/js/events.js?v=20180517002", "wap/js/event.js": "wap/js/event.js?v=20171222005", "wap/js/applyform.js": "wap/js/applyform.js?v=20171228001", "wap/js/masterpage.js": "wap/js/masterpage.js?v=20170918001", "ticket/css/ticket.css": "ticket/css/ticket.css?v=20180608", "pay/css/css.css": "pay/css/css.css?v=20180831"}
二、 新建类ContentConfig.cs
usingSystem; usingSystem.Collections.Generic; usingSystem.Linq; usingSystem.Web; usingNewtonsoft.Json.Linq; usingSystem.IO; usingNewtonsoft.Json; /// <summary> ///ContentConfig 的摘要说明 /// </summary> public classContentConfig { private static bool noCache = true; private staticJObject BuildItems() { var json = File.ReadAllText(HttpContext.Current.Server.MapPath("~/Content/Json/CssJsVersion.json")); returnJObject.Parse(json); } public staticJObject Items { get{ if (noCache || _Items == null) { _Items =BuildItems(); } return_Items; } } private staticJObject _Items; public static T GetValue<T>(stringkey) { try{ return Items[key].Value<T>(); } catch(Exception) { return Items["erro"].Value<T>(); } } public static String[] GetStringList(stringkey) { return Items[key].Select(x => x.Value<String>()).ToArray(); } public static String GetString(stringkey) { return GetValue<String>(key); } public static int GetInt(stringkey) { return GetValue<int>(key); } public static string GetJsCssVersionUrl(stringOldfileName) { string url = Config.RESOURCE_PATH + "/"; try{ url +=GetString(OldfileName); } catch (Exception)//未找到 OldfileName { url +=OldfileName; } returnurl; } /// <summary> ///把Json文本转为实体 /// </summary> /// <typeparam name="T"></typeparam> /// <param name="input"></param> /// <returns></returns> public static T FromJSON<T>(stringinput) { try{ return JsonConvert.DeserializeObject<T>(input); } catch(Exception ex) { return default(T); } } }
三、调用
js:
<script src="<%= ContentConfig.GetJsCssVersionUrl("pc/js/home.js") %>"></script>
css:
<link href="<%= ContentConfig.GetJsCssVersionUrl("pc/css/common.css") %>" rel="stylesheet" type="text/css" />
5.高级开发:任何打包工具都可以做到,如webpack,grunt,gulp正在学习...
后语:
1. 第四个方法是笔者实际中使用的,有什么问题,也可以交流交流(* ̄︶ ̄)
2.方法那样使用,但不限于那样使用,随意发挥
3.