Cache-Control header HTTP MDN
Note that no-cache means “it can be stored but don’t reuse before validating” — so it’s not for preventing a response from being stored. Clients can use this header when the user requires the response to not only be fresh, but also requires that it won’t be updated for a period of time. Browsers usually add no-cache to requests when users are force reloading a page. No-cache allows clients to request the most up-to-date response even if the cache has a fresh response.
- Stale responses are served for up to 30seconds while the CDN revalidates in the background.
- Caches are encouraged to treat the value as if it were 0 (this is noted in the Calculating Freshness Lifetime section of the HTTP specification).
- Clicking on the Tampermonkey icon at any time will pop up a menu that shows you what userscripts are running on the website you are looking at.
- The parameter sets the number of secondsbeyond the freshness lifetime during which the staleresponse remains usable as a fallback.
- The private directive restricts storage to privatecaches, typically the end user’s browser.
- Tampermonkey is a userscript manager extension for Android, Chrome, Chromium, Edge, Firefox, Opera, Safari, and other similar web browsers, written by Jan Biniok.
These directives define seven days as the maximum cache duration, with a one-day window for serving stale content while revalidating. If you don’t want a response stored in caches, use the no-store directive. The no-cache request directive asks caches to validate the response with the origin server before reuse. If a request doesn’t have an Authorization header, or you are already using s-maxage or must-revalidate in the response, then you don’t need to use public. The public response directive indicates that the response can be stored in a shared cache.
Request Directives
The public directive marks a response as eligiblefor storage in shared caches. The must-revalidate directive allows caches to servethe response while fresh. The no-store directive asks caches not to storethe request or the corresponding response. The min-fresh directive requests a stored responsewhose remaining freshness lifetime is at 4rabet india login password least thespecified number of seconds. Both requestsand responses carry directives that determine howbrowsers, proxies, and CDNs store and serve cachedresponses across the entire delivery chain.
Installing Userscripts
You can choose between three different configuration modes Novice, Beginner and Advanced.This allows power user to access and use advanced features and capabilities of Tampermonkey. Tampermonkey’s dashboard shows a clear overview of the scripts that are installed.You can see when they were updated the last time, if they do have a homepage, you can sort them and many more… Click at the image to view full size Whether you’re a web developer looking to add new features to your site, or just a regular user looking to improve your online experience, Tampermonkey is a great tool to have in your toolkit. This means that you can quickly and easily access a vast library of customizations and enhancements for your favorite web pages, without having to spend hours writing your own code. For example, with Tampermonkey, you could add a new button to a web page that lets you quickly share a link on social media, or to automatically fill in a form with your personal information.
Cachesskip conditional requests forimmutable resources, eliminating revalidation roundtrips for assets like versioned JavaScript bundles orfingerprinted images. A common mistake is using no-cachewhen no-store is intended for sensitive datasuch as banking or medical records. No-cache allows storage but requiresrevalidation before every use. This meansresponses without Cache-Control are cachedby browsers and CDNs.