JasonGenX
JasonGenX

Reputation: 5434

Cache-Control: max-age=0 with stale-while-revalidate value?

what happens if the max-age is zero but stale-while-revalidate has a value?

example: Cache-Control: max-age=0, stale-while-revalidate=60

will the stale-while-revalidate be taken into consideration at all? or the origin will be hit every time for the data?

Upvotes: 2

Views: 1162

Answers (1)

rhinosforhire
rhinosforhire

Reputation: 1345

A request would be sent to the origin every time.

stale-while-revalidate allows the client to use a stale response--while it revalidates with origin--if the response's age is less than max-age + stale-while-revalidate.


Here's a scenario using Cache-Control: max-age=0, stale-while-revalidate=60:

A user lands on a page and then refreshes the page.

The response is immediately stale because max-age=0 but its age is within the still-usable window of time (i.e max-age + stale-while-revalidate).

The client loads the stale response and sends a request to the origin to revalidate it.

Upvotes: 4

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