예제 #1
0
파일: offline.go 프로젝트: qnib/go-ipfs
func (c *offlineRouting) GetValue(ctx context.Context, key string) ([]byte, error) {
	v, err := c.datastore.Get(dshelp.NewKeyFromBinary(key))
	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
}
예제 #2
0
// FIXME(brian): is this method meant to simulate getting a value from the network?
func (c *client) GetValue(ctx context.Context, key string) ([]byte, error) {
	log.Debugf("GetValue: %s", key)
	v, err := c.datastore.Get(dshelp.NewKeyFromBinary(key))
	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
}
예제 #3
0
func (p *ipnsPublisher) getPreviousSeqNo(ctx context.Context, ipnskey string) (uint64, error) {
	prevrec, err := p.ds.Get(dshelp.NewKeyFromBinary(ipnskey))
	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
}
예제 #4
0
파일: repub.go 프로젝트: tswindell/go-ipfs
func (rp *Republisher) getLastVal(k string) (path.Path, uint64, error) {
	ival, err := rp.ds.Get(dshelp.NewKeyFromBinary([]byte(k)))
	if err != nil {
		// not found means we dont have a previously published entry
		return "", 0, errNoEntry
	}

	val := ival.([]byte)
	dhtrec := new(recpb.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
}