Caching
Age
Indicates how long a response has been stored in a cache, in seconds since generation.
Syntax
Age: <seconds>Example
Age: 3600Description
Age indicates the time in seconds a response has been in a cache since the origin server generated it. Typically added by CDNs.
Combined with Cache-Control: max-age, clients can calculate remaining freshness lifetime.
Useful for debugging caching. If Age is always 0, the cache may not be working.
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