Howto lookup NAPTR records in Go?

Question

I am attempting to query NAPTR records in Go. It appears the DNS basics provided in the 'net' library won't give me access. I am therefore looking at using (see docs), but can't find any basic examples. Are there any recommendations on alternatives or some insight on how to query for NAPTR?

Answer 1

AFAIK, you would have to roll your own for the net library. Using miekg/dns, I would think something like this:

m := new(dns.Msg)
m.SetQuestion("statdns.net.", dns.TypeNAPTR)
ret, err := dns.Exchange(m, "8.8.8.8:53")

From the ret, you should have an Answer member of []RR. I'm presupposing you can access like:

if t, ok := ret.Answer[0].(*dns.NAPTR); ok {
    // do something with t.Order, t.Preference, etc.
}

The available members are defined in the NAPTR type.

Caveat emptor: I'm away from my workstation for a bit and can't try this out...