Caching - Cache-Control:
Caching - Cache-Control:
- Controls over cache revalidation and reload
- these may only be imposed by a user agent.
- no-cache Force end-to-end reload
- max-age = delta-seconds The client is willing to accept a response whose age is no greater than the specified time in seconds.
- must-revalidate Forces revalidation, or generates Gateway Timeout response
- proxy-revalidate Same as must-revalidate, except for private user-agent caches