我们如何控制 OSGI 上资源的网页缓存？

Question

我需要缓存来自 AEM 的资源（图像和字体）。使用 SlingHttpServletRequest 我可以获取所有资源路径。所以我如何将实际资源放入浏览器缓存中。我使用 slingResponse.setHeader() 检查它。但仍然是找不到将资源路径放入浏览器缓存的方法。

Answer 1

Browser cache is controlled using Cache-Control headers. This ideally needs to be set up on the dispatcher. On a standard set up dispatcher isn't configured to cache response headers. So any headers set on the server will not be used for subsequent requests when it is served from cache.

Use the mod_headers module on the dispatcher to send out max-age or expires values for the files you are interested in.

Ex: To cache all static resources for 1 year on the browser use

<LocationMatch "^\/etc\/designs\/my-project\/clientlibs-site\/(css|images|fonts|placeholders)\/.*">
  Header set Cache-Control "public, max-age=31536000"
</LocationMatch>

On encountering the cache control headers browsers will cache the resources.