tvl-depot/templater/dns.go

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// Copyright (C) 2016-2017 Vincent Ambo <mail@tazj.in>
//
// This file is part of Kontemplate.
//
// Kontemplate is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This file contains the implementation of a template function for retrieving
// IP addresses from DNS
package templater
import (
"fmt"
"net"
"os"
)
func GetIPsFromDNS(host string) ([]interface{}, error) {
fmt.Fprintf(os.Stderr, "Attempting to look up IP for %s in DNS\n", host)
ips, err := net.LookupIP(host)
if err != nil {
return nil, fmt.Errorf("IP address lookup failed: %v", err)
}
var result []interface{} = make([]interface{}, len(ips))
for i, ip := range ips {
result[i] = ip
}
return result, nil
}