This is the HTTP/1.1 standard: https://datatracker.ietf.org/doc/html/rfc2616
Then there are also HTTP/2 and HTTP/3.
That's just HTTP, curl supports 27 other protocols.
This is the HTTP/1.1 standard: https://datatracker.ietf.org/doc/html/rfc2616
Then there are also HTTP/2 and HTTP/3.
That's just HTTP, curl supports 27 other protocols.
HTTP/1.1 - June 1999
It's not like the standard changed since curl was created
It (the http rfc) refers to other standards such as for URLs, and those did actually change (to include ipv6 and more internationalisation).
That's a tree, but the rest of that comment is the forest.