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The Deprecation HTTP Header Field (greenbytes.de)

submitted 4 months ago by [email protected] to c/[email protected]

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[–] [email protected] 1 points 4 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.