// GetBlock retrieves a particular block from the service,
// Getting it from the datastore using the key (hash).
func (s *BlockService) GetBlock(ctx context.Context, k u.Key) (*blocks.Block, error) {
log.Debugf("BlockService GetBlock: '%s'", k)
datai, err := s.Datastore.Get(k.DsKey())
if err == nil {
log.Debug("Blockservice: Got data in datastore.")
bdata, ok := datai.([]byte)
if !ok {
return nil, fmt.Errorf("data associated with %s is not a []byte", k)
}
return &blocks.Block{
Multihash: mh.Multihash(k),
Data: bdata,
}, nil
} else if err == ds.ErrNotFound && s.Remote != nil {
log.Debug("Blockservice: Searching bitswap.")
blk, err := s.Remote.Block(ctx, k)
if err != nil {
return nil, err
}
return blk, nil
} else {
log.Debug("Blockservice GetBlock: Not found.")
return nil, ErrNotFound
}
}
func (bs *blockstore) Get(k u.Key) (*blocks.Block, error) {
maybeData, err := bs.datastore.Get(k.DsKey())
if err != nil {
return nil, err
}
bdata, ok := maybeData.([]byte)
if !ok {
return nil, ValueTypeMismatch
}
return blocks.NewBlockWithHash(bdata, mh.Multihash(k))
}
func TestKey(t *testing.T) {
h1, err := mh.Sum([]byte("beep boop"), mh.SHA2_256, -1)
if err != nil {
t.Error(err)
}
k1 := Key(h1)
h2 := mh.Multihash(k1)
k2 := Key(h2)
if !bytes.Equal(h1, h2) {
t.Error("Multihashes not equal.")
}
if k1 != k2 {
t.Error("Keys not equal.")
}
}