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What do you need to know about cache control?
Cache-Control 1 Syntax. Case-insensitive, but lowercase is recommended. 2 Directives. Directives that define whether a response/request can be cached, where it may be cached, and whether it must be validated with the origin server before caching. 3 Examples. 4 Specifications 5 Browser compatibility.
What does the Cache-Control header in http mean?
The Cache-Control HTTP header holds directives (instructions) for caching in both requests and responses. A given directive in a request does not mean the same directive should be in the response. Caching directives have the following rules to be valid: Case-insensitive, but lowercase is recommended.
How does cache control work in Drupal.org?
Cache Control allows you to cache any content for registered users, although it does require that you write custom code in your own modules in order to do that. – In case of pages that have a large number of user-specific blocks, ESI makes as many requests to Drupal (assuming none of the user-specific blocks are cached) as there are blocks.
What does the cache control field in MDN mean?
Jump to: The Cache-Control general-header field is used to specify directives for caching mechanisms in both requests and responses. Caching directives are unidirectional, meaning that a given directive in a request is not implying that the same directive is to be given in the response.
Is it safe to use both no cache and no store?
If a caching system correctly implements no-store, then you wouldn’t need no-cache. But not all do. Additionally, some browsers implement no-cache like it was no-store. Thus, while not strictly required, it’s probably safest to include both.
Which is better cache control or expires in HTTP 1.0?
The Expires is per the HTTP 1.0 and 1.1 spec for clients and proxies. In HTTP 1.1, the Cache-Control takes precedence over Expires, so it’s after all for HTTP 1.0 proxies only. If you don’t care about IE6 and its broken caching when serving pages over HTTPS with only no-store, then you could omit Cache-Control: no-cache.
How to prevent browser caching using HTTP headers?
Cache-Control ‘No-Store’ & ‘No-Cache’ Header Settings. A “Cache-Control” setting of private instructs any proxies not to cache the page but it does still permit the browser to cache. Changing this to no-store instructs the browser to not cache the page and not store it in a local cache. This is the most secure setting.