Cache control google
Commonly-Used HTTP/1.1 Cache-Control Header Values The HTTP/1.1 specification in RFC 2616 defines several values for the Cache-Control header.
3. The following list contains a few of the more common values that are used. If none of Expires, Cache-Control: max-age, or Cache-Control: s- maxage (see section 14.9.3) appears in the response, and the response does not include other restrictions on caching, the cache MAY compute a freshness lifetime using a heuristic. When I read the HTTP 1.1 spec, my understanding from sections 14.9 - 14.9.2 is if no-store is specified, then responses must not be cached (shared or non-shared); caching is off, therefore the need to specify no-cache, private, etc. The first control message is allocated into a cache that is associated with the processor, but not associated with the peripheral device. However, any connected custom domains will serve the configured value. Render-blocking resources above the fold. See how Imperva CDN can help you with website performance. In response to a read-prompt the processor … After expiring, a browser must refresh its version of the resource by sending another request to a server.
Google allows users to search the Web for images, news, products, video, and other content. Cache-control: public means the cached version can be saved by proxies and other intermediate servers, where everyone can see it. The max-age request directive defines, in seconds, the amount of time it takes for a cached copy of a resource to expire. A system and method have been provided for pushing cacheable control messages to a processor. Control … The cache MUST attach Warning 113 to any response whose age is more than 24 hours if such warning has not already been added. An example of an HTTP Response Header from google.com.
Cache-Control: Max-Age. You can also learn more about CORS headers. For … There … We are also using KeyCDN's free Cache Enabler plugin to deliver the WebP formatted images we converted earlier for faster download times. Important: Firebase Hosting overwrites the Strict-Transport-Security configuration on default Hosting subdomains (like *.web.app). Public: The HTTP response may be cached by any cache. Request Demo or learn more.
is obviated. You can learn more about Cache-Control in the Hosting section that describes serving dynamic content and hosting microservices. Cache-control: private means the file is different for different users (such as their personal homepage).
Google developers published a diagram on optimal caching policy which appears to confirm my understanding of the spec: if no-store is specified nothing else is needed. Google PageSpeed Insights is now telling us that we have JavaScript and CSS above the fold. No Cache automatically clears your browser, download, cookies, form data, passwords, and app data The method accepts a first control message, identified as cacheable and addressed to a processor, from a peripheral device. In the settings make sure to check the "Create an additional cached version for WebP image support" setting.