Checking Cache

You might wondering if the content you access was already cached on CDN or not. To check cache you can use curl command.

curl -I


curl -I

HTTP/2 200 
access-control-allow-origin: *
access-control-expose-headers: *
accept-ranges: bytes
age: 4
cache-control: public, max-age=86400
content-type: application/javascript; charset=utf-8
date: Sat, 03 Oct 2020 09:10:32 GMT
etag: "f0a5a3cfc241cc1f72d96c77cf1a362535e0fcf95ccb26f6c3d40f30812e99a7"
server: statically
strict-transport-security: max-age=31536000; includeSubDomains; preload
timing-allow-origin: *
vary: Accept-Encoding
x-cache: HIT
x-content-type-options: nosniff
x-served-by: cache-sin18049-SIN
content-length: 1228362

X-Cache: HIT means that the content has been cached on the CDN. Each CDN usually has a different indicator, please also check CF-Cache and CDN-Cache if it's listed.