Contents
Why do we need cache-control?
Cache-control adds the flexibility that makes browser caching truly useful, letting developers dictate how each resource will be cached. It also lets developers set special rules for intermediaries, which is a factor in why sites that use a CDN, like the Cloudflare CDN, tend to perform better than sites that don’t.
How do I find my server cache?
If you open the DNS console, select View in the menu bar, then select Advanced View. You will see a Cache node appear. Expand the node and you can see the queried zones and records within them.
How do I access my DNS cache?
To display the contents of the DNS resolver cache: Type ipconfig /displaydns and press Enter. Observe the contents of the DNS resolver cache.
How to set HTTP headers ( for cache control )?
To use cache-control in HTML, you use the meta tag, e.g. . The value in the content field is defined as one of the four values below. Some information on the Cache-Control header is as follows.
How is cache control used in the browser?
Cache-control is an HTTP header used to specify browser caching policies in both client requests and server responses. Policies include how a resource is cached, where it’s cached and its maximum age before expiring (i.e., time to live). The cache-control header is broken up into directives, the most common of which are detailed below:
When to ignore the Expires header in Cache Control?
The expires header is ignored when a cache-control header containing a max-age directive is present. ETag – A response header that identifies the version of served content according to a token – a string of characters in quotes, e.g., “675af34563dc-tr34” – that changes after a resource is modified.
What does cache control and no store mean?
Cache-Control: No-Cache. The no-cache directive means that a browser may cache a response, but must first submit a validation request to an origin server. Cache-Control: No-Store. The no-store directive means browsers aren’t allowed to cache a response and must pull it from the server each time it’s requested.