如何设置清漆缓存控制标头 [英] How to Set Varnish Cache-Control Headers

问题描述

我希望有人可以建议让Varnish发送缓存控制标头的正确方法。目前，我的配置是向客户端发送Cache-Control：no-cache。

I am hoping someone can advise on the proper method for getting Varnish to send cache-control headers. Currently, my configuration is sending "Cache-Control: no-cache" to clients.

提前感谢任何可能提供帮助的人......

Thanks in advance to anyone who might be able to help...

推荐答案

你的后端正在向Varnish发送Cache-Control：no-cache，这意味着两件事：

Your back-end is sending "Cache-Control: no-cache" to Varnish which implies two things:

• Varnish will不将响应存储在缓存中（因此下一次查找将失败）


• 您的客户端（浏览器和中间代理）不会缓存响应（并反复请求它们）。

解决方案很简单：从后端获取响应后（以及在将它们存储在缓存中之前）删除缓存控制头。

The solution is simple: remove the cache-control headers after fetching the response from the back-end (and before storing them in the cache).

在你的vcl文件中执行：

In your vcl file do:

sub vcl_fetch {
  remove beresp.http.Cache-Control;
  set beresp.http.Cache-Control = "public";
}

您可以选择仅对某些网址执行此操作（将其包装在（如果req.url~）逻辑）并且做更多高级的东西。

You can choose to only do this for certain urls (wrap it in ( if req.url ~ "" ) logic) and do way more advanced stuff.

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