// VerifyRecord checks a record and ensures it is still valid.
// It runs needed validators
func (v Validator) VerifyRecord(r *pb.Record) error {
// Now, check validity func
parts := strings.Split(r.GetKey(), "/")
if len(parts) < 3 {
log.Infof("Record key does not have validator: %s", key.Key(r.GetKey()))
return nil
}
val, ok := v[parts[1]]
if !ok {
log.Infof("Unrecognized key prefix: %s", parts[1])
return ErrInvalidRecordType
}
return val.Func(key.Key(r.GetKey()), r.GetValue())
}
func (c *offlineRouting) GetValue(ctx context.Context, key key.Key) ([]byte, error) {
v, err := c.datastore.Get(key.DsKey())
if err != nil {
return nil, err
}
byt, ok := v.([]byte)
if !ok {
return nil, errors.New("value stored in datastore not []byte")
}
rec := new(pb.Record)
err = proto.Unmarshal(byt, rec)
if err != nil {
return nil, err
}
return rec.GetValue(), nil
}
// FIXME(brian): is this method meant to simulate getting a value from the network?
func (c *client) GetValue(ctx context.Context, key key.Key) ([]byte, error) {
log.Debugf("GetValue: %s", key)
v, err := c.datastore.Get(key.DsKey())
if err != nil {
return nil, err
}
data, ok := v.([]byte)
if !ok {
return nil, errors.New("could not cast value from datastore")
}
rec := new(dhtpb.Record)
err = proto.Unmarshal(data, rec)
if err != nil {
return nil, err
}
return rec.GetValue(), nil
}
func (p *ipnsPublisher) getPreviousSeqNo(ctx context.Context, ipnskey key.Key) (uint64, error) {
prevrec, err := p.ds.Get(ipnskey.DsKey())
if err != nil && err != ds.ErrNotFound {
// None found, lets start at zero!
return 0, err
}
var val []byte
if err == nil {
prbytes, ok := prevrec.([]byte)
if !ok {
return 0, fmt.Errorf("unexpected type returned from datastore: %#v", prevrec)
}
dhtrec := new(dhtpb.Record)
err := proto.Unmarshal(prbytes, dhtrec)
if err != nil {
return 0, err
}
val = dhtrec.GetValue()
} else {
// try and check the dht for a record
ctx, cancel := context.WithTimeout(ctx, time.Second*30)
defer cancel()
rv, err := p.routing.GetValue(ctx, ipnskey)
if err != nil {
// no such record found, start at zero!
return 0, nil
}
val = rv
}
e := new(pb.IpnsEntry)
err = proto.Unmarshal(val, e)
if err != nil {
return 0, err
}
return e.GetSequence(), nil
}
func (rp *Republisher) getLastVal(k key.Key) (path.Path, uint64, error) {
ival, err := rp.ds.Get(k.DsKey())
if err != nil {
// not found means we dont have a previously published entry
return "", 0, errNoEntry
}
val := ival.([]byte)
dhtrec := new(dhtpb.Record)
err = proto.Unmarshal(val, dhtrec)
if err != nil {
return "", 0, err
}
// extract published data from record
e := new(pb.IpnsEntry)
err = proto.Unmarshal(dhtrec.GetValue(), e)
if err != nil {
return "", 0, err
}
return path.Path(e.Value), e.GetSequence(), nil
}
// RecordBlobForSig returns the blob protected by the record signature
func RecordBlobForSig(r *pb.Record) []byte {
k := []byte(r.GetKey())
v := []byte(r.GetValue())
a := []byte(r.GetAuthor())
return bytes.Join([][]byte{k, v, a}, []byte{})
}