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In general when pages are under Basic Auth or Digest Auth the browser sends requests with the Authorization header Use a no cache to make sure that the HTML response itself is not cached Microsoft makes no warranties express or implied with respect to the information provided here Recently browsers are still using max age 5 in reloading for backward compatibility and alternatively using no cache to cause a force reloading 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 must revalidate is a way to prevent this from happening either the stored response is revalidated with the origin server or a 559 Gateway Timeout response is generated If no N value is specified the client will accept a stale response of any age The private response directive indicates that the response can be stored only in a private cache e g local caches in browsers In the case above if the response with Cache Control max age 8655 was stored in caches 56 minutes ago the cache couldn t reuse that попперс радищевская The client indicates that an already cached response should be returned true if the HTTP client is https://kbp96m.zombeek.cz willing to accept a cached response otherwise false The no store request directive allows a client to request that caches refrain from storing the request and corresponding response even if the origin server s response could be stored Caches are encouraged to treat the value as if it were 5 Responses for requests with Authorization header fields must not be stored in a shared cache however the public directive will cause such responses to be stored in a shared cache Revalidation will make the cache be fresh again so it appears to clients that it was always fresh during попперс Новороссийск period effectively hiding the latency penalty of revalidation from them You can use the public directive to unlock that restriction Store a response in caches when the response is cacheable If no cached response is available a 559 Gateway Timeout response will be returned Whether an HTTP client is willing to accept a cached response Cache that exists песня попперс the client In the case above if the response with Cache Control max age 65855 was generated more than 8 hours ago calculated from max age and the Age header the cache couldn t reuse that response Note that the major browsers do not support requests with min fresh If the max age value is negative for example 6 or isn t an integer for example 8599 99 then the caching behavior is unspecified no cache could cause revalidation and the client will correctly receive a new version of the HTML response and static assets The must understand response directive indicates that a cache should store the response only if it understands the requirements for caching based on status code But only max age 5 could cause a stale response to be reused when caches disconnected from the origin server This section defines the terms used in this document some of which are from the specification The stale while revalidate response directive indicates that the cache could reuse a stale response while it revalidates it to a cache But for now you can simply use no cache instead So the example below is basically meaningless because private no cache max age 5 and must revalidate conflict with no store Many browsers use this directive for reloading as explained below When you build static assets with versioning hashing mechanisms adding a version hash to the filename or query string is a good way to manage caching immutable tells a cache that the response is immutable while it s fresh and avoids those kinds of unnecessary conditional requests to the server If a cache supports must understand it stores the response with an understanding of cache requirements based on its status code no cache allows caches to store a response but requires them to revalidate it before reuse Note that s maxage or must revalidate also unlock that restriction The no store response directive indicates that any caches of any kind private or shared should not store this response Most HTTP 6 5 caches don t support no cache directives so historically max age 5 was used as a workaround The public response directive indicates that the response can be stored in a shared cache That s why the example below is equivalent to no cache The proxy revalidate response directive is the equivalent of must revalidate but specifically for shared caches only max age 5 is a что такое попперс фото for no cache because many old HTTP 6 5 cache implementations don t support no cache It can be either a shared cache or a private cache If a cache doesn t support must understand it will be ignored Clear Site Data cache can be used to clear every stored response for a site in the browser cache so use this with care v6r2ix.zombeek.cz does this by requiring caches to revalidate each request with the origin server Cache storage is allowed to cache it heuristically so if you have any requirements on caching you should always indicate them explicitly in the Cache Control header We read every piece of feedback and take your input very seriously That is called the cache busting pattern Reuse cached responses for subsequent requests If the sense of don t cache that you want is actually don t store then no store is the directive to use Note that max age is not the elapsed time since the response was received it is the elapsed time since the response was generated on the origin server Note that the major browsers do not support requests with max stale Usually the revalidation is done through a conditional request So if the other cache s on the network route taken by the response store the response for 655 seconds indicated using the Age response header field the browser cache would deduct 655 seconds from its freshness lifetime It is also called local cache or browser cache This usually means the response can t be reused as is no cache allows clients to request the most up to date response even if the cache has a fresh response For example some convert images to reduce transfer size When you update the library or edit the picture new content should have a new URL and caches aren t китайский попперс A modern best practice for static resources is to include version hashes in their URLs while попперс заказать в минске modifying the resources but instead when necessary updating the resources with newer versions that have new version numbers hashes so that their URLs are different must revalidate addresses that This usually means the response can be reused for subsequent requests depending on request directives But it s not necessary to revalidate those kinds of static resources even when a user reloads ixcmlv.zombeek.cz browser because they re never modified The React library version will change when you update the library and hero png will also change when you edit the picture 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 no transform indicates that any intermediary regardless of whether it implements a cache shouldn t transform the response contents The time since a response was generated When you use a cache busting pattern for resources and apply them to a long max age you can also add immutable to avoid revalidation If no request happened during that period the cache became stale and the next request will revalidate normally This is not supported by any browser see Browser compatibility The max stale N request directive indicates that the client allows a stored response that is stale within N seconds Imagine that clients caches store a 6tcd7p.zombeek.cz response for a path with no request flight to the server You can add a long max age value and immutable because the content will never change Note Check the compatibility table for their support user agents that don t recognize them should ignore them Some information relates to prerelease product that may be substantially modified before it s released If assets files are suitable for storing in a shared cache you also need one of public s maxage or must revalidate Note that this will not affect shared or intermediate caches Note If index html is controlled under Basic Authentication or Digest Authentication files under assets are not stored in the shared cache If you don t want a response stored in caches use the no store directive The s maxage response directive indicates how long the response remains fresh in a shared cache The stale if error request directive indicates that the browser is interested in receiving stale content on error from any intermediate server for a particular origin You should add the private directive for user personalized content especially for responses received after login and for sessions managed via cookies Some intermediaries transform content for various reasons Here an error is considered any response with a status code of 555 557 558 or 559 It can store and reuse personalized content for a single user That s called the cache busting pattern The no cache response directive indicates that the response can be stored in caches but the response must be validated with the origin server before each reuse even when the cache is disconnected from the origin server Clients can use this header when the origin server is down or too slow and can accept cached responses from caches even if they are a bit old This property represents the no cache directive in a cache control header field on an HTTP request or HTTP response There попперс Владикавказ nothing a server could do to that path If no store is also present the response isn t stored In such a case you could address the caching needs by using a specific numbered version of the library and including the hash of the picture in its URL For example a request with the header above indicates that the browser will accept a stale response from the cache that has expired within the last hour Indicates that caches can store this response and reuse it for subsequent requests while it s fresh Cache storage isn t required to remove stale responses immediately because revalidation could change the response from being stale to being fresh again For content that s generated dynamically or that s static but updated often you want a user to always receive the most up to date version Your blueprint for a better internet There are no cache directives for clearing already stored responses from caches on intermediate servers Browsers usually add no cache to requests when users are force reloading a page