forked from coredns/coredns
/
debug.go
57 lines (48 loc) · 1.08 KB
/
debug.go
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package etcd
import (
"strings"
"github.com/miekg/coredns/middleware/etcd/msg"
"github.com/miekg/dns"
)
const debugName = "o-o.debug."
// isDebug checks if name is a debugging name, i.e. starts with o-o.debug.
// it return the empty string if it is not a debug message, otherwise it will return the
// name with o-o.debug. stripped off. Must be called with name lowercased.
func isDebug(name string) string {
if len(name) == len(debugName) {
return ""
}
name = strings.ToLower(name)
debug := strings.HasPrefix(name, debugName)
if !debug {
return ""
}
return name[len(debugName):]
}
// servicesToTxt puts debug in TXT RRs.
func servicesToTxt(debug []msg.Service) []dns.RR {
if debug == nil {
return nil
}
rr := make([]dns.RR, len(debug))
for i, d := range debug {
rr[i] = d.RR()
}
return rr
}
func errorToTxt(err error) dns.RR {
if err == nil {
return nil
}
msg := err.Error()
if len(msg) > 255 {
msg = msg[:255]
}
t := new(dns.TXT)
t.Hdr.Class = dns.ClassCHAOS
t.Hdr.Ttl = 0
t.Hdr.Rrtype = dns.TypeTXT
t.Hdr.Name = "."
t.Txt = []string{msg}
return t
}