frostfs-node/lib/objutil/verifier.go
alexvanin dadfd90dcd Initial commit
Initial public review release v0.10.0
2020-07-10 17:45:00 +03:00

35 lines
876 B
Go

package objutil
import (
"bytes"
"context"
"github.com/nspcc-dev/neofs-api-go/object"
)
// Verifier is an interface for checking whether an object conforms to a certain criterion.
// Nil error is equivalent to matching the criterion.
type Verifier interface {
Verify(context.Context, *object.Object) error
}
// MarshalHeaders marshals all object headers which are "higher" than to-th extended header.
func MarshalHeaders(obj *object.Object, to int) ([]byte, error) {
buf := new(bytes.Buffer)
if sysHdr, err := obj.SystemHeader.Marshal(); err != nil {
return nil, err
} else if _, err := buf.Write(sysHdr); err != nil {
return nil, err
}
for i := range obj.Headers[:to] {
if header, err := obj.Headers[i].Marshal(); err != nil {
return nil, err
} else if _, err := buf.Write(header); err != nil {
return nil, err
}
}
return buf.Bytes(), nil
}