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                                                   Hypertext Transfer Protocol (HTTP) Cache-Status

Created
        2021-08-19

Last Updated
        2022-06-21

Available Formats
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Registry Included Below

  • HTTP Cache-Status

HTTP Cache-Status

Registration Procedure(s)

             Expert Review


Expert(s)

             Mark Nottingham


Reference
        [RFC 9211]

Available Formats
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        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         [RFC 9211]
                           response was obtained from the cache.
fwd        Token           When present, indicates that the request went forward towards the origin; its value indicates why.               [RFC 9211]
fwd-status Integer         Indicates which status code (see [RFC 9110, Section 15]) the next-hop server returned in response to the         [RFC 9211]
                           forwarded request.
                           Indicates the response’s remaining freshness lifetime (see [RFC 9111, Section 4.2.1]) as calculated by the
ttl        Integer         cache, as an integer number of seconds, measured as closely as possible to when the response header section is   [RFC 9211]
                           sent by the cache.
stored     Boolean         Indicates whether the cache stored the response (see [RFC 9111, Section 3]); a true value indicates that it did. [RFC 9211]
collapsed  Boolean         Indicates whether this request was collapsed together with one or more other forward requests (see [RFC 9111,    [RFC 9211]
                           Section 4]); If true, the response was successfully reused; if not, a new request had to be made.
key        String          Conveys a representation of the cache key (see [RFC 9111, Section 2]) used for the response.                     [RFC 9211]
detail     String or Token Allows implementations to convey additional information not captured in other parameters, such as                [RFC 9211]
                           implementation-specific states or other caching-related metrics.

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