A client MUST send a Host header field ( Section 7.2 of [HTTP]) in all HTTP/1.1 request messages. If
the target URI includes an authority component, then a client MUST send a field value for Host
that is identical to that authority component, excluding any userinfo subcomponent and its "@"
delimiter (Section 4.2 of [HTTP] ). If the authority component is missing or undefined for the target
URI, then a client MUST send a Host header field with an empty field value.
A server MUST respond with a 400 (Bad Request) status code to any HTTP/1.1 request message that
lacks a Host header field and to any request message that contains more than one Host header
field line or a Host header field with an invalid field value.
[ ] Header tem que conter EXATAMENTE um Host
Parsing Requirements
Aceitar IPv4
Aceitar ...:port. Se nao houver isso, considerar default port
Item 3.2 do RFC 9112
Parsing Requirements
...:port. Se nao houver isso, considerar default port