如何验证“高速缓存控制”，“无高速缓存，无存储，必须重新生效” [英] how to verify "Cache-Control", "no-cache, no-store, must-revalidate"
问题描述
我正在了解缓存以及如何管理它。
I am learning about cache and how to manage it.
我可以看到静态内容，如图片，css文件，js文件存储在临时文件夹打开我的网页。但是现在当我在响应头中添加这些属性时，我看不到缓存行为的任何更改。
I can see that static content like images, css files, js files gets stored in temporary folder when I open my website pages. But now when I added these attributes in response header, I cannot see any changes in cache behaviour.
所有内容都像以前一样存储。即使我在js文件中进行一些更改，我看不到新的js文件被抓取。浏览器使用的旧js文件包含过期的内容。
All content is getting stored like before. And even when I am making some changes in js files, I cannot see new js files being fetched. Browser uses the same old js files with outdated content.
所以我做错了。
我在JSP档案中新增的逻辑：
Logic that I added in JSP file :
response.setHeader("Cache-Control", "no-cache, no-store, must-revalidate"); // HTTP1.1.
response.setDateHeader("Expires", 0); // Proxies.
response.setHeader("Pragma", "no-cache"); // HTTP 1.0.
执行以下更改后：
响应标头
Cache-Control:no-cache, no-store, must-revalidate
Content-Language:en-US
Content-Length:3333
Content-Type:text/html;charset=ISO-8859-1
Date:Fri, 12 Dec 2014 11:48:37 GMT
Expires:Thu, 01 Jan 1970 00:00:00 GMT
Pragma:no-cache
Server:WebSphere Application Server/8.0
X-Powered-By:Servlet/3.0
b $ b
在这些更改之前：
Before these changes:
响应标题
Content-Language:en-US
Content-Length:6788
Content-Type:text/html;charset=ISO-8859-1
Date:Fri, 12 Dec 2014 11:50:10 GMT
Server:WebSphere Application Server/8.0
X-Powered-By:Servlet/3.0
我只想知道如何验证这些标头是否正常工作。
I just wanted to know that how can I verify that these headers are working properly. Any help would be appreciated.
推荐答案
在Chrome中安装LiveHTTPHeaders，您可以看到页面中的所有标题。你也可以用硬盘的方式做，并使用pcap工具，如tcpdump或Wireshark查看请求的数据包和查看头。
Install LiveHTTPHeaders in Chrome and you can see all the headers in the page. You can also do it the hard way and use a pcap tool like tcpdump or Wireshark to see the requested packets and view the headers.
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