tvl-depot/templater/dns.go

35 lines
677 B
Go
Raw Normal View History

// This file contains the implementation of a template function for retrieving IP addresses from DNS
package templater
import (
"fmt"
"github.com/polydawn/meep"
"net"
"os"
)
type DNSError struct {
meep.TraitAutodescribing
meep.TraitCausable
Output string
}
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, meep.New(
&DNSError{Output: "IP address lookup failed"},
meep.Cause(err),
)
}
var result []interface{} = make([]interface{}, len(ips))
for i, ip := range ips {
result[i] = ip
}
return result, nil
}