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2. Is HTTP Being Used?

2. Is HTTP Being Used?​

Different applications have different goals when using HTTP. The recommendations in this document apply when a specification defines an application that:

  • uses the transport port 80 or 443, or

  • uses the URI scheme "http" or "https", or

  • uses an ALPN protocol ID [RFC7301] that generically identifies HTTP (e.g., "http/1.1", "h2", "h3"), or

  • makes registrations in or overall modifications to the IANA registries defined for HTTP.

Additionally, when a specification is using HTTP, all of the requirements of the HTTP protocol suite are in force ([HTTP] in particular but also other specifications such as the specific version of HTTP in use and any extensions in use).

Note that this document is intended to apply to applications, not generic extensions to HTTP. Furthermore, while it is intended for IETF-specified applications, other standards organisations are encouraged to adhere to its requirements.

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