HTTPS kapcsolatnál a harmadik fél látja a linket amit lekér a kliens?

A HTTPS a HTTP-kommunikáció minden elemét titkosítja, beleértve a HTTP-fejlécet is.

Egyedül a hosztnevet nem.

"Because HTTPS piggybacks HTTP entirely on top of TLS, the entirety of the underlying HTTP protocol can be encrypted. This includes the request URL (which particular web page was requested), query parameters, headers, and cookies (which often contain identity information about the user). However, because host (website) addresses and port numbers are necessarily part of the underlying TCP/IP protocols, HTTPS cannot protect their disclosure."

Forrás: [link]