How to find out in golang what ip/country/city the user came from?

Question

go

How to find out in golang what ip/country/city the user came from?

Answer 1

Golang has nothing to do with
getting IP - you go to the databases
https://sypexgeo.net/
tabgeo.com/en/index

Answer 2

IP is in http.Request.RemoteAddrwhich is transmitted to anyonehttp.Handler

http.HandleFunc("/something", func(w http.ResponseWriter, r *http.Request) {
  IP := r.RemoteAddr()
        ...
}