js css等静态文件版本控制,一处配置多处更新.net版【原创】

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

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using Newtonsoft.Json.Linq;
using System.IO;
using Newtonsoft.Json;

/// <summary>
/// ContentConfig 的摘要说明
/// </summary>
public class ContentConfig
{
    private static bool noCache = true;
    private static JObject BuildItems()
    {
        var json = File.ReadAllText(HttpContext.Current.Server.MapPath("~/Content/Json/CssJsVersion.json"));
        return JObject.Parse(json);
    }

    public static JObject Items
    {
        get
        {
            if (noCache || _Items == null)
            {
                _Items = BuildItems();
            }
            return _Items;
        }
    }
    private static JObject _Items;

    public static T GetValue<T>(string key)
    {

        try
        {
            return Items[key].Value<T>();
        }
        catch (Exception)
        {

            return Items["erro"].Value<T>();
        }

    }

    public static String[] GetStringList(string key)
    {
        return Items[key].Select(x => x.Value<String>()).ToArray();
    }

    public static String GetString(string key)
    {
        return GetValue<String>(key);
    }

    public static int GetInt(string key)
    {
        return GetValue<int>(key);
    }
    public static string GetJsCssVersionUrl(string OldfileName)
    {
        string url = Config.RESOURCE_PATH + "/";
        try
        {
            url += GetString(OldfileName);
        }
        catch (Exception)//未找到 OldfileName
        {
            url += OldfileName;
        }
        return url;
    }

    /// <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>(string input)
    {
        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.