[#233] services/object: Implement new Get algorithm

Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>

pkg/services/object/server.go

@@ -0,0 +1,26 @@
+package object
+
+import (
+	"context"
+
+	"github.com/nspcc-dev/neofs-api-go/v2/object"
+	"github.com/nspcc-dev/neofs-node/pkg/services/util"
+)
+
+// GetObjectStream is an interface of NeoFS API v2 compatible object streamer.
+type GetObjectStream interface {
+	util.ServerStream
+	Send(*object.GetResponse) error
+}
+
+// ServiceServer is an interface of utility
+// serving v2 Object service.
+type ServiceServer interface {
+	Get(*object.GetRequest, GetObjectStream) error
+	Put(context.Context) (object.PutObjectStreamer, error)
+	Head(context.Context, *object.HeadRequest) (*object.HeadResponse, error)
+	Search(context.Context, *object.SearchRequest) (object.SearchObjectStreamer, error)
+	Delete(context.Context, *object.DeleteRequest) (*object.DeleteResponse, error)
+	GetRange(context.Context, *object.GetRangeRequest) (object.GetRangeObjectStreamer, error)
+	GetRangeHash(context.Context, *object.GetRangeHashRequest) (*object.GetRangeHashResponse, error)
+}