The Deprecation HTTP response header field is used to signal to consumers of a resource (in the sense of [URI]) that the resource will be or has been deprecated. Additionally, the deprecation link relation can be used to link to a resource that provides additional information about planned or existing deprecation, and possibly ways in which clients can best manage deprecation.
  • Domi@lemmy.secnd.me
    1·
    5 months ago

    The RFC you linked recommends that no new X- prefixed headers should be used.

    The paragraph you quoted does not say you should use the X- prefix, only comments on how it was used.

    See section 3 for the creation of new parameters: https://datatracker.ietf.org/doc/html/rfc6648#section-3

    I still work on software that extendively uses X- headers.

    I wouldn’t worry too much about it. The reason they give is mostly that it is annoying if a X- header suddenly becomes standardized and you end up having to support X-Something and Something. Most likely a non-issue with real custom headers.