// GetBlock retrieves a particular block from the service,
// Getting it from the datastore using the key (hash).
func (s *BlockService) GetBlock(k u.Key) (*blocks.Block, error) {
u.DOut("BlockService GetBlock: '%s'\n", k.Pretty())
dsk := ds.NewKey(string(k))
datai, err := s.Datastore.Get(dsk)
if err == nil {
u.DOut("Blockservice: Got data in datastore.\n")
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 {
u.DOut("Blockservice: Searching bitswap.\n")
blk, err := s.Remote.GetBlock(k, time.Second*5)
if err != nil {
return nil, err
}
return blk, nil
} else {
u.DOut("Blockservice GetBlock: Not found.\n")
return nil, u.ErrNotFound
}
}
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.")
}
}