javascript - 如何将版本号添加到 HTML 文件(不仅是 css 和 js 文件)

Question

许多人在 css 和 js 文件上使用版本号来强制非缓存版本在发布更新时加载到网页上:

CSS 示例:

<link rel="stylesheet" type="text/css" href="style.css?v=2017-03-17">

JS 示例:

<script type="text/javascript" src="js/myscript.js?v=2017-03-17"></script>

我注意到，通过向 css/js 文件添加版本号，网络浏览器也会从头加载 HTML 文件(从中引用 css/js 文件)并且不使用缓存版本。

这是确保 HTML 文件在所有网络浏览器中从头显示的充分方法，还是有办法为 HTML 文件 设置版本号，以确保新更新的 HTML 文档没有从浏览器的缓存中加载？

Answer 1

通常浏览器总是采用较新版本的 HTML。

如果你想阻止任何缓存，你可以使用这些技巧:

The correct minimum set of headers that works across the most important browsers:

Cache-Control: no-cache, no-store, must-revalidate
Pragma: no-cache
Expires: 0

HTML

<meta http-equiv="Cache-Control" content="no-cache, no-store, must-revalidate" />
<meta http-equiv="Pragma" content="no-cache" />
<meta http-equiv="Expires" content="0" />

.htaccess (Apache)

<IfModule mod_headers.c>
  Header set Cache-Control "no-cache, no-store, must-revalidate"
  Header set Pragma "no-cache"
  Header set Expires 0
</IfModule>

Java Servlet

response.setHeader("Cache-Control", "no-cache, no-store, must-revalidate");
response.setHeader("Pragma", "no-cache");
response.setDateHeader("Expires", 0);

PHP

header('Cache-Control: no-cache, no-store, must-revalidate');
header('Pragma: no-cache');
header('Expires: 0');

ASP

Response.addHeader "Cache-Control", "no-cache, no-store, must-revalidate"
Response.addHeader "Pragma", "no-cache"
Response.addHeader "Expires", "0"

ASP.NET

Response.AppendHeader("Cache-Control", "no-cache, no-store, must-revalidate");
Response.AppendHeader("Pragma", "no-cache");
Response.AppendHeader("Expires", "0");

Ruby on Rails

response.headers['Cache-Control'] = 'no-cache, no-store, must-revalidate'
response.headers['Pragma'] = 'no-cache'
response.headers['Expires'] = '0'

Python on Flask

resp.headers["Cache-Control"] = "no-cache, no-store, must-revalidate"
resp.headers["Pragma"] = "no-cache"
resp.headers["Expires"] = "0"

Google Go

responseWriter.Header().Set("Cache-Control", "no-cache, no-store, must-revalidate")
responseWriter.Header().Set("Pragma", "no-cache")
responseWriter.Header().Set("Expires", "0")

来源:http://cristian.sulea.net/blog.php?p=2014-01-14-disable-browser-caching-with-meta-html-tags