[#40] object/put: Assign zero return of MaxObjectSize invalid

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

pkg/services/object/put/service.go

@@ -13,6 +13,10 @@ import (
 )
 
 type MaxSizeSource interface {
+	// MaxObjectSize returns maximum payload size
+	// of physically stored object in system.
+	//
+	// Must return 0 if value can not be obtained.
 	MaxObjectSize() uint64
 }
 

pkg/services/object/put/streamer.go

@@ -66,8 +66,13 @@ func (p *Streamer) initTarget(prm *PutInitPrm) error {
 		return errors.Wrapf(err, "(%T) could not receive session key", p)
 	}
 
+	maxSz := p.maxSizeSrc.MaxObjectSize()
+	if maxSz == 0 {
+		return errors.Errorf("(%T) could not obtain max object size parameter", p)
+	}
+
 	p.target = transformer.NewPayloadSizeLimiter(
-		p.maxSizeSrc.MaxObjectSize(),
+		maxSz,
 		func() transformer.ObjectTarget {
 			return transformer.NewFormatTarget(&transformer.FormatterParams{
 				Key:          sessionKey,