func checkEOL(e *pb.IpnsEntry) (time.Time, bool) {
if e.GetValidityType() == pb.IpnsEntry_EOL {
eol, err := u.ParseRFC3339(string(e.GetValidity()))
if err != nil {
return time.Time{}, false
}
return eol, true
}
return time.Time{}, false
}
func selectRecord(recs []*pb.IpnsEntry, vals [][]byte) (int, error) {
var best_seq uint64
best_i := -1
for i, r := range recs {
if r == nil || r.GetSequence() < best_seq {
continue
}
if best_i == -1 || r.GetSequence() > best_seq {
best_seq = r.GetSequence()
best_i = i
} else if r.GetSequence() == best_seq {
rt, err := u.ParseRFC3339(string(r.GetValidity()))
if err != nil {
continue
}
bestt, err := u.ParseRFC3339(string(recs[best_i].GetValidity()))
if err != nil {
continue
}
if rt.After(bestt) {
best_i = i
} else if rt == bestt {
if bytes.Compare(vals[i], vals[best_i]) > 0 {
best_i = i
}
}
}
}
if best_i == -1 {
return 0, errors.New("no usable records in given set")
}
return best_i, nil
}
// ValidateIpnsRecord implements ValidatorFunc and verifies that the
// given 'val' is an IpnsEntry and that that entry is valid.
func ValidateIpnsRecord(k string, val []byte) error {
entry := new(pb.IpnsEntry)
err := proto.Unmarshal(val, entry)
if err != nil {
return err
}
switch entry.GetValidityType() {
case pb.IpnsEntry_EOL:
t, err := u.ParseRFC3339(string(entry.GetValidity()))
if err != nil {
log.Debug("failed parsing time for ipns record EOL")
return err
}
if time.Now().After(t) {
return ErrExpiredRecord
}
default:
return ErrUnrecognizedValidity
}
return nil
}