HTTP registry: h2c
Hypertext Transfer Protocol version 2 (HTTP/2) (OBSOLETE)
Upgrade values negotiate an alternate protocol or capability at a defined HTTP boundary. The registry marks this value obsoleted; review compatibility before deploying it. h2c is obsoleted in HTTP Upgrade Tokens. Defining reference: RFC9113, Section 3.1.
Identifier (http)
h2c
Hypertext Transfer Protocol version 2 (HTTP/2) (OBSOLETE)
Validate the requested protocol and preserve authority and certificate checks. The registry marks this value obsoleted; review compatibility before deploying it.
This registry value is currently marked obsoleted by IANA. Follow the defining specification before sending, accepting, or proxying it.
IANA registry: http-upgrade-tokens/http-upgrade-tokens-1
Registry reference: RFC9113, Section 3.1