Add client for object service

Signed-off-by: Alex Vanin <alexey@nspcc.ru>

v2/object/client_stream.go

@@ -0,0 +1,60 @@
+package object
+
+type (
+	GetObjectStreamer interface {
+		Recv() (*GetResponse, error)
+	}
+
+	PutObjectStreamer interface {
+		Send(*PutRequest) error
+		CloseAndRecv() (*PutResponse, error)
+	}
+
+	SearchObjectStreamer interface {
+		Recv() (*SearchResponse, error)
+	}
+
+	GetRangeObjectStreamer interface {
+		Recv() (*GetRangeResponse, error)
+	}
+)
+
+type (
+	getObjectStream struct {
+		recv func() (*GetResponse, error)
+	}
+
+	putObjectStream struct {
+		send func(*PutRequest) error
+
+		closeAndRecv func() (*PutResponse, error)
+	}
+
+	searchObjectStream struct {
+		recv func() (*SearchResponse, error)
+	}
+
+	getRangeObjectStream struct {
+		recv func() (*GetRangeResponse, error)
+	}
+)
+
+func (s *getObjectStream) Recv() (*GetResponse, error) {
+	return s.recv()
+}
+
+func (p *putObjectStream) Send(request *PutRequest) error {
+	return p.send(request)
+}
+
+func (p *putObjectStream) CloseAndRecv() (*PutResponse, error) {
+	return p.closeAndRecv()
+}
+
+func (s *searchObjectStream) Recv() (*SearchResponse, error) {
+	return s.recv()
+}
+
+func (r *getRangeObjectStream) Recv() (*GetRangeResponse, error) {
+	return r.recv()
+}