The cached response payload
Timestamp when the entry was created
Absolute expiry timestamp. Infinity = never expires
End of the stale-while-revalidate window
End of the stale-if-error window
ETag header value for conditional revalidation
Last-Modified header value for conditional revalidation
Hash of Vary-relevant request headers (null = Vary:*)
OptionalmustThe response carried Cache-Control: no-cache or must-revalidate, so it
may be stored but must not be reused without revalidating with the origin
(RFC 9111 §5.2.2.4). Absent on entries persisted by an older version.
Tags for group invalidation
Approximate entry size in bytes
A single entry stored in the cache with metadata and response data.