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Cache-Control

请求

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

响应

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: immutable
Cache-Control: stale-while-revalidate=<seconds>
Cache-Control: stale-if-error=<seconds>
  • private - 面向单用户 - Authorization - browser 缓存
  • public - 多用户共享缓存 - proxy cache 缓存
  • post-check
  • pre-check
  • immutable
    • max-age 内避免尝试校验缓存
# 单位为秒
Cache-Control: public, max-age=3600
Expires: Thu, 01 Dec 2014 16:00:00 GMT
  • Cache-Control: public, max-age=86400
    • static asset
  • Cache-Control: no-store
    • 不缓存
  • Cache-Control: private, max-age=3600
    • 浏览器缓存但 Proxy 不缓存
  • Cache-Control: public, no-cache
    • prefer revalidation when served
  • Cache-Control: public, no-cache, proxy-revalidate or Cache-Control: public, s-maxage=0
    • Cache assets in proxy caches but REQUIRE revalidation by the proxy when served
  • Cache-Control: public, no-cache, must-revalidate
    • Cache assets in proxy caches, but REQUIRE revalidation by any cache when served
  • Cache-Control: public, no-transform
    • Cache assets, but ensure the proxy does not modify it
  • Cache-Control: public, max-age=3600, stale-if-error=60
    • Cache assets with revalidation, but allow stale responses if origin server is unreachable
  • Cache-Control: public, max-age=7200, s-maxage=3600
    • Cache assets for different amounts of time on Cloudflare and in visitor browsers
  • Cache-Control: max-age=600, stale-while-revalidate=30
    • Cache an asset and serve while asset is being revalidated
  • https://developers.cloudflare.com/cache/about/cache-control

平台

  • x-vercel-cache
    • HIT, MISS
  • x-vercel-id
  • cf-cache-status
    • HIT, MISS, EXPIRED, DYNAMIC, BYPASS