Hypertext Transfer Protocol (HTTP) Cache-Status

Registry included below

HTTP Cache-Status

Registration Procedure(s)

Expert Review

Expert(s)

Mark Nottingham

Reference

[RFC9211]

Available Formats

CSV

Name	Type	Description	Reference
hit	Boolean	When true, indicates that the request was satisfied by the cache; that is, it was not forwarded, and the response was obtained from the cache.	[RFC9211]
fwd	Token	When present, indicates that the request went forward towards the origin; its value indicates why.	[RFC9211]
fwd-status	Integer	Indicates which status code (see [RFC9110], Section 15) the next-hop server returned in response to the forwarded request.	[RFC9211]
ttl	Integer	Indicates the response’s remaining freshness lifetime (see [RFC9111], Section 4.2.1) as calculated by the cache, as an integer number of seconds, measured as closely as possible to when the response header section is sent by the cache.	[RFC9211]
stored	Boolean	Indicates whether the cache stored the response (see [RFC9111], Section 3); a true value indicates that it did.	[RFC9211]
collapsed	Boolean	Indicates whether this request was collapsed together with one or more other forward requests (see [RFC9111], Section 4); If true, the response was successfully reused; if not, a new request had to be made.	[RFC9211]
key	String	Conveys a representation of the cache key (see [RFC9111], Section 2) used for the response.	[RFC9211]
detail	String or Token	Allows implementations to convey additional information not captured in other parameters, such as implementation-specific states or other caching-related metrics.	[RFC9211]