Cache-Control

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Cache-Control, HTTP .

Cache-Control: max-age=<seconds>
Cache-Control: max-stale[=<seconds>]
Cache-Control: min-fresh=<seconds>
Cache-Control: no-cache
Cache-Control: no-store
Cache-Control: no-transform
Cache-Control: only-if-cached

Cache-Control, HTTP .

Cache-Control: must-revalidate
Cache-Control: no-cache
Cache-Control: no-store
Cache-Control: no-transform
Cache-Control: public
Cache-Control: private
Cache-Control: proxy-revalidate
Cache-Control: max-age=<seconds>
Cache-Control: s-maxage=<seconds>

Cache-Control

Cache-Control , HTTP. , .

Cache-Control: immutable
Cache-Control: stale-while-revalidate=<seconds>
Cache-Control: stale-if-error=<seconds>

public

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private

, . .

no-cache

.

only-if-cached

. .

max-age=<seconds>

. Expires, .

s-maxage=<seconds>

max-age Expires, (, ) .

max-stale[=<seconds>]

, , . , , .

min-fresh=<seconds>

, , .

stale-while-revalidate=<seconds>

, , . , .

stale-if-error=<seconds>

...

must-revalidate

. .

proxy-revalidate

, must-revalidate, (, ) .

immutable

Indicates that the response body will not change over time. The resource, if unexpired, is unchanged on the server and therefore the client should not send a conditional revalidation for it (e.g. If-None-Match or If-Modified-Since) to check for updates, even when the user explicitly refreshes the page. Clients that aren't aware of this extension must ignore them as per the HTTP specification. In Firefox, immutable is only honored on https:// transactions. For more information, see also this blog post.

no-store

no-transform

. Content-Encoding, Content-Range, Content-Type . , , . no-transform .

. . Expires Pragma.

Cache-Control: no-cache, no-store, must-revalidate

, , . , , CSS JavaScript. . Expires.

Cache-Control: public, max-age=31536000

• HTTP Caching FAQ
• Age
• Expires
• Pragma