frostfs-node/pkg/local_object_storage/localstore/range.go

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package localstore
import (
"context"
"github.com/nspcc-dev/neofs-api-go/object"
"github.com/pkg/errors"
)
func (l *localstore) PRead(ctx context.Context, key Address, rng object.Range) ([]byte, error) {
var (
err error
k, v []byte
obj Object
)
k, err = key.Hash()
if err != nil {
return nil, errors.Wrap(err, "Localstore Get failed on key.Marshal")
}
v, err = l.blobBucket.Get(k)
if err != nil {
return nil, errors.Wrap(err, "Localstore Get failed on blobBucket.Get")
}
if err := obj.Unmarshal(v); err != nil {
return nil, errors.Wrap(err, "Localstore Get failed on object.Unmarshal")
}
if rng.Offset+rng.Length > uint64(len(obj.Payload)) {
return nil, ErrOutOfRange
}
return obj.Payload[rng.Offset : rng.Offset+rng.Length], nil
}