[#239] object/head: Implement new service processing

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

cmd/neofs-node/object.go

@@ -25,7 +25,6 @@ import (
 	getsvc "github.com/nspcc-dev/neofs-node/pkg/services/object/get"
 	getsvcV2 "github.com/nspcc-dev/neofs-node/pkg/services/object/get/v2"
 	headsvc "github.com/nspcc-dev/neofs-node/pkg/services/object/head"
-	headsvcV2 "github.com/nspcc-dev/neofs-node/pkg/services/object/head/v2"
 	putsvc "github.com/nspcc-dev/neofs-node/pkg/services/object/put"
 	putsvcV2 "github.com/nspcc-dev/neofs-node/pkg/services/object/put/v2"
 	searchsvc "github.com/nspcc-dev/neofs-node/pkg/services/object/search"
@@ -44,8 +43,6 @@ type objectSvc struct {
 
 	search *searchsvcV2.Service
 
-	head *headsvcV2.Service
-
 	get *getsvcV2.Service
 
 	delete *deletesvcV2.Service
@@ -140,7 +137,7 @@ func (s *objectSvc) Put(ctx context.Context) (object.PutObjectStreamer, error) {
 }
 
 func (s *objectSvc) Head(ctx context.Context, req *object.HeadRequest) (*object.HeadResponse, error) {
-	return s.head.Head(ctx, req)
+	return s.get.Head(ctx, req)
 }
 
 func (s *objectSvc) Search(ctx context.Context, req *object.SearchRequest) (object.SearchObjectStreamer, error) {
@@ -342,15 +339,10 @@ func initObjectService(c *cfg) {
 		),
 	)
 
-	sHeadV2 := headsvcV2.NewService(
-		headsvcV2.WithInternalService(sHead),
-	)
-
 	sGet := getsvc.New(
 		getsvc.WithLogger(c.log),
 		getsvc.WithLocalStorageEngine(ls),
 		getsvc.WithClientCache(clientCache),
-		getsvc.WithHeadService(sHead),
 		getsvc.WithClientOptions(
 			client.WithDialTimeout(c.viper.GetDuration(cfgObjectGetDialTimeout)),
 		),
@@ -403,7 +395,6 @@ func initObjectService(c *cfg) {
 								&objectSvc{
 									put:    sPutV2,
 									search: sSearchV2,
-									head:   sHeadV2,
 									get:    sGetV2,
 									delete: sDeleteV2,
 								},

pkg/services/object/get/exec.go

@@ -35,8 +35,12 @@ type execCtx struct {
 	collectedObject *object.Object
 
 	curOff uint64
+
+	head bool
 }
 
+type execOption func(*execCtx)
+
 const (
 	statusUndefined int = iota
 	statusOK
@@ -45,9 +49,23 @@ const (
 	statusOutOfRange
 )
 
+func headOnly() execOption {
+	return func(c *execCtx) {
+		c.head = true
+	}
+}
+
+func withPayloadRange(r *objectSDK.Range) execOption {
+	return func(c *execCtx) {
+		c.prm.rng = r
+	}
+}
+
 func (exec *execCtx) setLogger(l *logger.Logger) {
 	req := "GET"
-	if exec.ctxRange() != nil {
+	if exec.headOnly() {
+		req = "HEAD"
+	} else if exec.ctxRange() != nil {
 		req = "GET_RANGE"
 	}
 
@@ -92,7 +110,7 @@ func (exec execCtx) remotePrm() *client.GetObjectParams {
 }
 
 func (exec *execCtx) canAssemble() bool {
-	return exec.svc.assembly && !exec.isRaw()
+	return exec.svc.assembly && !exec.isRaw() && !exec.headOnly()
 }
 
 func (exec *execCtx) splitInfo() *objectSDK.SplitInfo {
@@ -107,6 +125,10 @@ func (exec *execCtx) ctxRange() *objectSDK.Range {
 	return exec.prm.rng
 }
 
+func (exec *execCtx) headOnly() bool {
+	return exec.head
+}
+
 func (exec *execCtx) generateTraverser(addr *objectSDK.Address) (*placement.Traverser, bool) {
 	t, err := exec.svc.traverserGenerator.GenerateTraverser(addr)
 
@@ -126,7 +148,7 @@ func (exec *execCtx) generateTraverser(addr *objectSDK.Address) (*placement.Trav
 }
 
 func (exec *execCtx) getChild(id *objectSDK.ID, rng *objectSDK.Range) (*object.Object, bool) {
-	w := newSimpleObjectWriter()
+	w := NewSimpleObjectWriter()
 
 	p := exec.prm
 	p.common = p.common.WithLocalOnly(false)
@@ -139,9 +161,9 @@ func (exec *execCtx) getChild(id *objectSDK.ID, rng *objectSDK.Range) (*object.O
 
 	p.WithAddress(addr)
 
-	exec.statusError = exec.svc.get(exec.context(), p)
+	exec.statusError = exec.svc.get(exec.context(), p.commonPrm, withPayloadRange(rng))
 
-	return w.object(), exec.status == statusOK
+	return w.Object(), exec.status == statusOK
 }
 
 func (exec *execCtx) headChild(id *objectSDK.ID) (*object.Object, bool) {
@@ -153,9 +175,14 @@ func (exec *execCtx) headChild(id *objectSDK.ID) (*object.Object, bool) {
 	p.common = p.common.WithLocalOnly(false)
 	p.WithAddress(childAddr)
 
-	header, err := exec.svc.headSvc.head(exec.context(), Prm{
+	prm := HeadPrm{
 		commonPrm: p.commonPrm,
-	})
+	}
+
+	w := NewSimpleObjectWriter()
+	prm.SetHeaderWriter(w)
+
+	err := exec.svc.Head(exec.context(), prm)
 
 	switch {
 	default:
@@ -172,7 +199,7 @@ func (exec *execCtx) headChild(id *objectSDK.ID) (*object.Object, bool) {
 		exec.status = statusOK
 		exec.err = nil
 
-		return header, true
+		return w.Object(), true
 	}
 }
 
@@ -244,6 +271,10 @@ func (exec *execCtx) writeCollectedHeader() bool {
 }
 
 func (exec *execCtx) writeObjectPayload(obj *object.Object) bool {
+	if exec.headOnly() {
+		return true
+	}
+
 	err := exec.prm.objWriter.WriteChunk(obj.Payload())
 
 	switch {

pkg/services/object/get/get.go

@@ -9,14 +9,12 @@ import (
 
 // Get serves a request to get an object by address, and returns Streamer instance.
 func (s *Service) Get(ctx context.Context, prm Prm) error {
-	return s.get(ctx, RangePrm{
+	return s.get(ctx, prm.commonPrm).err
-		commonPrm: prm.commonPrm,
-	}).err
 }
 
 // GetRange serves a request to get an object by address, and returns Streamer instance.
 func (s *Service) GetRange(ctx context.Context, prm RangePrm) error {
-	return s.get(ctx, prm).err
+	return s.get(ctx, prm.commonPrm, withPayloadRange(prm.rng)).err
 }
 
 func (s *Service) GetRangeHash(ctx context.Context, prm RangeHashPrm) (*RangeHashRes, error) {
@@ -50,14 +48,28 @@ func (s *Service) GetRangeHash(ctx context.Context, prm RangeHashPrm) (*RangeHas
 	}, nil
 }
 
-func (s *Service) get(ctx context.Context, prm RangePrm) statusError {
+// Head reads object header from container.
+//
+// Returns ErrNotFound if the header was not received for the call.
+// Returns SplitInfoError if object is virtual and raw flag is set.
+func (s *Service) Head(ctx context.Context, prm HeadPrm) error {
+	return s.get(ctx, prm.commonPrm, headOnly()).err
+}
+
+func (s *Service) get(ctx context.Context, prm commonPrm, opts ...execOption) statusError {
 	exec := &execCtx{
 		svc: s,
 		ctx: ctx,
-		prm:       prm,
+		prm: RangePrm{
+			commonPrm: prm,
+		},
 		infoSplit: objectSDK.NewSplitInfo(),
 	}
 
+	for i := range opts {
+		opts[i](exec)
+	}
+
 	exec.setLogger(s.log)
 
 	exec.execute()

pkg/services/object/get/get_test.go

@@ -93,8 +93,8 @@ func newTestClient() *testClient {
 	}
 }
 
-func (c *testClient) GetObject(_ context.Context, p RangePrm) (*objectSDK.Object, error) {
+func (c *testClient) getObject(exec *execCtx) (*objectSDK.Object, error) {
-	v, ok := c.results[p.Address().String()]
+	v, ok := c.results[exec.address().String()]
 	if !ok {
 		return nil, object.ErrNotFound
 	}
@@ -103,7 +103,7 @@ func (c *testClient) GetObject(_ context.Context, p RangePrm) (*objectSDK.Object
 		return nil, v.err
 	}
 
-	return cutToRange(v.obj.Object(), p.rng).SDK(), nil
+	return cutToRange(v.obj.Object(), exec.ctxRange()).SDK(), nil
 }
 
 func (c *testClient) head(_ context.Context, p Prm) (*object.Object, error) {
@@ -126,11 +126,11 @@ func (c *testClient) addResult(addr *objectSDK.Address, obj *object.RawObject, e
 	}{obj: obj, err: err}
 }
 
-func (s *testStorage) Get(p RangePrm) (*object.Object, error) {
+func (s *testStorage) get(exec *execCtx) (*object.Object, error) {
 	var (
 		ok    bool
 		obj   *object.Object
-		sAddr = p.Address().String()
+		sAddr = exec.address().String()
 	)
 
 	if _, ok = s.inhumed[sAddr]; ok {
@@ -142,7 +142,7 @@ func (s *testStorage) Get(p RangePrm) (*object.Object, error) {
 	}
 
 	if obj, ok = s.phy[sAddr]; ok {
-		return cutToRange(obj, p.rng), nil
+		return cutToRange(obj, exec.ctxRange()), nil
 	}
 
 	return nil, object.ErrNotFound
@@ -207,6 +207,7 @@ func generateObject(addr *objectSDK.Address, prev *objectSDK.ID, payload []byte,
 	obj.SetContainerID(addr.ContainerID())
 	obj.SetID(addr.ObjectID())
 	obj.SetPayload(payload)
+	obj.SetPayloadSize(uint64(len(payload)))
 	obj.SetPreviousID(prev)
 	obj.SetChildren(children...)
 
@@ -249,11 +250,20 @@ func TestGetLocalOnly(t *testing.T) {
 		return p
 	}
 
+	newHeadPrm := func(raw bool, w ObjectWriter) HeadPrm {
+		p := HeadPrm{}
+		p.SetHeaderWriter(w)
+		p.WithRawFlag(raw)
+		p.common = new(util.CommonPrm).WithLocalOnly(true)
+
+		return p
+	}
+
 	t.Run("OK", func(t *testing.T) {
 		storage := newTestStorage()
 		svc := newSvc(storage)
 
-		w := newSimpleObjectWriter()
+		w := NewSimpleObjectWriter()
 		p := newPrm(false, w)
 
 		payloadSz := uint64(10)
@@ -273,16 +283,24 @@ func TestGetLocalOnly(t *testing.T) {
 
 		require.NoError(t, err)
 
-		require.Equal(t, obj.Object(), w.object())
+		require.Equal(t, obj.Object(), w.Object())
 
-		w = newSimpleObjectWriter()
+		w = NewSimpleObjectWriter()
 
 		rngPrm := newRngPrm(false, w, payloadSz/3, payloadSz/3)
 		rngPrm.WithAddress(addr)
 
 		err = svc.GetRange(ctx, rngPrm)
 		require.NoError(t, err)
-		require.Equal(t, payload[payloadSz/3:2*payloadSz/3], w.object().Payload())
+		require.Equal(t, payload[payloadSz/3:2*payloadSz/3], w.Object().Payload())
+
+		w = NewSimpleObjectWriter()
+		headPrm := newHeadPrm(false, w)
+		headPrm.WithAddress(addr)
+
+		err = svc.Head(ctx, headPrm)
+		require.NoError(t, err)
+		require.Equal(t, obj.CutPayload().Object(), w.Object())
 	})
 
 	t.Run("INHUMED", func(t *testing.T) {
@@ -306,6 +324,12 @@ func TestGetLocalOnly(t *testing.T) {
 
 		err = svc.GetRange(ctx, rngPrm)
 		require.True(t, errors.Is(err, object.ErrAlreadyRemoved))
+
+		headPrm := newHeadPrm(false, nil)
+		headPrm.WithAddress(addr)
+
+		err = svc.Head(ctx, headPrm)
+		require.True(t, errors.Is(err, object.ErrAlreadyRemoved))
 	})
 
 	t.Run("404", func(t *testing.T) {
@@ -328,6 +352,12 @@ func TestGetLocalOnly(t *testing.T) {
 		err = svc.GetRange(ctx, rngPrm)
 
 		require.True(t, errors.Is(err, object.ErrNotFound))
+
+		headPrm := newHeadPrm(false, nil)
+		headPrm.WithAddress(addr)
+
+		err = svc.Head(ctx, headPrm)
+		require.True(t, errors.Is(err, object.ErrNotFound))
 	})
 
 	t.Run("VIRTUAL", func(t *testing.T) {
@@ -361,6 +391,13 @@ func TestGetLocalOnly(t *testing.T) {
 		err = svc.Get(ctx, p)
 
 		require.True(t, errors.As(err, &errSplit))
+
+		headPrm := newHeadPrm(true, nil)
+		headPrm.WithAddress(addr)
+
+		err = svc.Head(ctx, headPrm)
+		require.True(t, errors.As(err, &errSplit))
+		require.Equal(t, splitInfo, errSplit.SplitInfo())
 	})
 }
 
@@ -440,7 +477,7 @@ func TestGetRemoteSmall(t *testing.T) {
 
 	newSvc := func(b *testPlacementBuilder, c *testClientCache) *Service {
 		svc := &Service{cfg: new(cfg)}
-		svc.log = test.NewLogger(true)
+		svc.log = test.NewLogger(false)
 		svc.localStorage = newTestStorage()
 		svc.assembly = true
 		svc.traverserGenerator = &testTraverserGenerator{
@@ -476,6 +513,15 @@ func TestGetRemoteSmall(t *testing.T) {
 		return p
 	}
 
+	newHeadPrm := func(raw bool, w ObjectWriter) HeadPrm {
+		p := HeadPrm{}
+		p.SetHeaderWriter(w)
+		p.WithRawFlag(raw)
+		p.common = new(util.CommonPrm).WithLocalOnly(false)
+
+		return p
+	}
+
 	t.Run("OK", func(t *testing.T) {
 		addr := generateAddress()
 		addr.SetContainerID(cid)
@@ -507,28 +553,36 @@ func TestGetRemoteSmall(t *testing.T) {
 			},
 		})
 
-		w := newSimpleObjectWriter()
+		w := NewSimpleObjectWriter()
 
 		p := newPrm(false, w)
 		p.WithAddress(addr)
 
 		err := svc.Get(ctx, p)
 		require.NoError(t, err)
-		require.Equal(t, obj.Object(), w.object())
+		require.Equal(t, obj.Object(), w.Object())
 
 		*c1, *c2 = *c2, *c1
 
 		err = svc.Get(ctx, p)
 		require.NoError(t, err)
-		require.Equal(t, obj.Object(), w.object())
+		require.Equal(t, obj.Object(), w.Object())
 
-		w = newSimpleObjectWriter()
+		w = NewSimpleObjectWriter()
 		rngPrm := newRngPrm(false, w, payloadSz/3, payloadSz/3)
 		rngPrm.WithAddress(addr)
 
 		err = svc.GetRange(ctx, rngPrm)
 		require.NoError(t, err)
-		require.Equal(t, payload[payloadSz/3:2*payloadSz/3], w.object().Payload())
+		require.Equal(t, payload[payloadSz/3:2*payloadSz/3], w.Object().Payload())
+
+		w = NewSimpleObjectWriter()
+		headPrm := newHeadPrm(false, w)
+		headPrm.WithAddress(addr)
+
+		err = svc.Head(ctx, headPrm)
+		require.NoError(t, err)
+		require.Equal(t, obj.CutPayload().Object(), w.Object())
 	})
 
 	t.Run("INHUMED", func(t *testing.T) {
@@ -567,6 +621,12 @@ func TestGetRemoteSmall(t *testing.T) {
 
 		err = svc.GetRange(ctx, rngPrm)
 		require.True(t, errors.Is(err, object.ErrAlreadyRemoved))
+
+		headPrm := newHeadPrm(false, nil)
+		headPrm.WithAddress(addr)
+
+		err = svc.Head(ctx, headPrm)
+		require.True(t, errors.Is(err, object.ErrAlreadyRemoved))
 	})
 
 	t.Run("404", func(t *testing.T) {
@@ -605,9 +665,26 @@ func TestGetRemoteSmall(t *testing.T) {
 
 		err = svc.GetRange(ctx, rngPrm)
 		require.True(t, errors.Is(err, object.ErrNotFound))
+
+		headPrm := newHeadPrm(false, nil)
+		headPrm.WithAddress(addr)
+
+		err = svc.Head(ctx, headPrm)
+		require.True(t, errors.Is(err, object.ErrNotFound))
 	})
 
 	t.Run("VIRTUAL", func(t *testing.T) {
+		testHeadVirtual := func(svc *Service, addr *objectSDK.Address, i *objectSDK.SplitInfo) {
+			headPrm := newHeadPrm(false, nil)
+			headPrm.WithAddress(addr)
+
+			errSplit := objectSDK.NewSplitInfoError(objectSDK.NewSplitInfo())
+
+			err := svc.Head(ctx, headPrm)
+			require.True(t, errors.As(err, &errSplit))
+			require.Equal(t, i, errSplit.SplitInfo())
+		}
+
 		t.Run("linking", func(t *testing.T) {
 			t.Run("get linking failure", func(t *testing.T) {
 				addr := generateAddress()
@@ -645,6 +722,8 @@ func TestGetRemoteSmall(t *testing.T) {
 					},
 				})
 
+				testHeadVirtual(svc, addr, splitInfo)
+
 				p := newPrm(false, nil)
 				p.WithAddress(addr)
 
@@ -717,15 +796,15 @@ func TestGetRemoteSmall(t *testing.T) {
 					},
 				})
 
-				p := newPrm(false, newSimpleObjectWriter())
+				testHeadVirtual(svc, addr, splitInfo)
+
+				p := newPrm(false, NewSimpleObjectWriter())
 				p.WithAddress(addr)
 
 				err := svc.Get(ctx, p)
 				require.True(t, errors.Is(err, object.ErrNotFound))
 
-				svc.headSvc = c2
+				rngPrm := newRngPrm(false, NewSimpleObjectWriter(), 0, 1)
-
-				rngPrm := newRngPrm(false, newSimpleObjectWriter(), 0, 1)
 				rngPrm.WithAddress(addr)
 
 				err = svc.GetRange(ctx, rngPrm)
@@ -792,18 +871,18 @@ func TestGetRemoteSmall(t *testing.T) {
 					},
 				})
 
-				w := newSimpleObjectWriter()
+				testHeadVirtual(svc, addr, splitInfo)
+
+				w := NewSimpleObjectWriter()
 
 				p := newPrm(false, w)
 				p.WithAddress(addr)
 
 				err := svc.Get(ctx, p)
 				require.NoError(t, err)
-				require.Equal(t, srcObj.Object(), w.object())
+				require.Equal(t, srcObj.Object(), w.Object())
 
-				svc.headSvc = c2
+				w = NewSimpleObjectWriter()
-
-				w = newSimpleObjectWriter()
 				payloadSz := srcObj.PayloadSize()
 
 				off := payloadSz / 3
@@ -814,7 +893,7 @@ func TestGetRemoteSmall(t *testing.T) {
 
 				err = svc.GetRange(ctx, rngPrm)
 				require.NoError(t, err)
-				require.Equal(t, payload[off:off+ln], w.object().Payload())
+				require.Equal(t, payload[off:off+ln], w.Object().Payload())
 			})
 		})
 
@@ -855,6 +934,8 @@ func TestGetRemoteSmall(t *testing.T) {
 					},
 				})
 
+				testHeadVirtual(svc, addr, splitInfo)
+
 				p := newPrm(false, nil)
 				p.WithAddress(addr)
 
@@ -917,11 +998,12 @@ func TestGetRemoteSmall(t *testing.T) {
 					},
 				})
 
+				testHeadVirtual(svc, addr, splitInfo)
+
 				headSvc := newTestClient()
 				headSvc.addResult(preRightAddr, nil, object.ErrNotFound)
-				svc.headSvc = headSvc
 
-				p := newPrm(false, newSimpleObjectWriter())
+				p := newPrm(false, NewSimpleObjectWriter())
 				p.WithAddress(addr)
 
 				err := svc.Get(ctx, p)
@@ -987,18 +1069,18 @@ func TestGetRemoteSmall(t *testing.T) {
 					},
 				})
 
-				svc.headSvc = c2
+				testHeadVirtual(svc, addr, splitInfo)
 
-				w := newSimpleObjectWriter()
+				w := NewSimpleObjectWriter()
 
 				p := newPrm(false, w)
 				p.WithAddress(addr)
 
 				err := svc.Get(ctx, p)
 				require.NoError(t, err)
-				require.Equal(t, srcObj.Object(), w.object())
+				require.Equal(t, srcObj.Object(), w.Object())
 
-				w = newSimpleObjectWriter()
+				w = NewSimpleObjectWriter()
 				payloadSz := srcObj.PayloadSize()
 
 				off := payloadSz / 3
@@ -1009,9 +1091,9 @@ func TestGetRemoteSmall(t *testing.T) {
 
 				err = svc.GetRange(ctx, rngPrm)
 				require.NoError(t, err)
-				require.Equal(t, payload[off:off+ln], w.object().Payload())
+				require.Equal(t, payload[off:off+ln], w.Object().Payload())
 
-				w = newSimpleObjectWriter()
+				w = NewSimpleObjectWriter()
 				off = payloadSz - 2
 				ln = 1
 
@@ -1020,7 +1102,7 @@ func TestGetRemoteSmall(t *testing.T) {
 
 				err = svc.GetRange(ctx, rngPrm)
 				require.NoError(t, err)
-				require.Equal(t, payload[off:off+ln], w.object().Payload())
+				require.Equal(t, payload[off:off+ln], w.Object().Payload())
 			})
 		})
 	})

pkg/services/object/get/local.go

@@ -10,7 +10,7 @@ import (
 func (exec *execCtx) executeLocal() {
 	var err error
 
-	exec.collectedObject, err = exec.svc.localStorage.Get(exec.prm)
+	exec.collectedObject, err = exec.svc.localStorage.get(exec)
 
 	var errSplitInfo *objectSDK.SplitInfoError
 

pkg/services/object/get/prm.go

@@ -31,6 +31,11 @@ type RangeHashPrm struct {
 	rngs []*objectSDK.Range
 }
 
+// HeadPrm groups parameters of Head service call.
+type HeadPrm struct {
+	commonPrm
+}
+
 type commonPrm struct {
 	objWriter ObjectWriter
 
@@ -50,9 +55,15 @@ type ChunkWriter interface {
 	WriteChunk([]byte) error
 }
 
+// HeaderWriter is an interface of target component
+// to write object header.
+type HeaderWriter interface {
+	WriteHeader(*object.Object) error
+}
+
 // ObjectWriter is an interface of target component to write object.
 type ObjectWriter interface {
-	WriteHeader(*object.Object) error
+	HeaderWriter
 	ChunkWriter
 }
 
@@ -71,9 +82,9 @@ func (p *commonPrm) SetRemoteCallOptions(opts ...client.CallOption) {
 	p.callOpts = opts
 }
 
-// SetObjectWriter sets target component to write the object payload range.
+// SetChunkWriter sets target component to write the object payload range.
 func (p *RangePrm) SetChunkWriter(w ChunkWriter) {
-	p.objWriter = &rangeWriter{
+	p.objWriter = &partWriter{
 		chunkWriter: w,
 	}
 }
@@ -97,3 +108,10 @@ func (p *RangeHashPrm) SetHashGenerator(v func() hash.Hash) {
 func (p *commonPrm) SetCommonParameters(common *util.CommonPrm) {
 	p.common = common
 }
+
+// SetHeaderWriter sets target component to write the object header.
+func (p *HeadPrm) SetHeaderWriter(w HeaderWriter) {
+	p.objWriter = &partWriter{
+		headWriter: w,
+	}
+}

pkg/services/object/get/remote.go

@@ -20,7 +20,7 @@ func (exec *execCtx) processNode(ctx context.Context, addr *network.Address) boo
 		return true
 	}
 
-	obj, err := client.GetObject(ctx, exec.prm)
+	obj, err := client.getObject(exec)
 
 	var errSplitInfo *objectSDK.SplitInfoError
 

pkg/services/object/get/service.go

@@ -1,7 +1,6 @@
 package getsvc
 
 import (
-	"context"
 	"crypto/ecdsa"
 
 	"github.com/nspcc-dev/neofs-api-go/pkg/client"
@@ -9,7 +8,6 @@ import (
 	"github.com/nspcc-dev/neofs-node/pkg/core/object"
 	"github.com/nspcc-dev/neofs-node/pkg/local_object_storage/engine"
 	"github.com/nspcc-dev/neofs-node/pkg/network/cache"
-	headsvc "github.com/nspcc-dev/neofs-node/pkg/services/object/head"
 	"github.com/nspcc-dev/neofs-node/pkg/services/object/util"
 	"github.com/nspcc-dev/neofs-node/pkg/services/object_manager/placement"
 	"github.com/nspcc-dev/neofs-node/pkg/util/logger"
@@ -25,7 +23,7 @@ type Service struct {
 type Option func(*cfg)
 
 type getClient interface {
-	GetObject(context.Context, RangePrm) (*objectSDK.Object, error)
+	getObject(*execCtx) (*objectSDK.Object, error)
 }
 
 type cfg struct {
@@ -33,12 +31,8 @@ type cfg struct {
 
 	log *logger.Logger
 
-	headSvc interface {
-		head(context.Context, Prm) (*object.Object, error)
-	}
-
 	localStorage interface {
-		Get(RangePrm) (*object.Object, error)
+		get(*execCtx) (*object.Object, error)
 	}
 
 	clientCache interface {
@@ -54,7 +48,6 @@ func defaultCfg() *cfg {
 	return &cfg{
 		assembly:     true,
 		log:          zap.L(),
-		headSvc:      new(headSvcWrapper),
 		localStorage: new(storageEngineWrapper),
 		clientCache:  new(clientCacheWrapper),
 	}
@@ -117,10 +110,3 @@ func WithTraverserGenerator(t *util.TraverserGenerator) Option {
 		c.traverserGenerator = t
 	}
 }
-
-// WithHeadService returns option to set the utility serving object.Head.
-func WithHeadService(svc *headsvc.Service) Option {
-	return func(c *cfg) {
-		c.headSvc.(*headSvcWrapper).svc = svc
-	}
-}

pkg/services/object/get/util.go

@@ -1,7 +1,6 @@
 package getsvc
 
 import (
-	"context"
 	"crypto/ecdsa"
 	"hash"
 
@@ -10,10 +9,9 @@ import (
 	"github.com/nspcc-dev/neofs-node/pkg/core/object"
 	"github.com/nspcc-dev/neofs-node/pkg/local_object_storage/engine"
 	"github.com/nspcc-dev/neofs-node/pkg/network/cache"
-	headsvc "github.com/nspcc-dev/neofs-node/pkg/services/object/head"
 )
 
-type simpleObjectWriter struct {
+type SimpleObjectWriter struct {
 	obj *object.RawObject
 
 	pld []byte
@@ -33,13 +31,11 @@ type storageEngineWrapper struct {
 	engine *engine.StorageEngine
 }
 
-type headSvcWrapper struct {
+type partWriter struct {
-	svc *headsvc.Service
-}
-
-type rangeWriter struct {
 	ObjectWriter
 
+	headWriter HeaderWriter
+
 	chunkWriter ChunkWriter
 }
 
@@ -47,13 +43,13 @@ type hasherWrapper struct {
 	hash hash.Hash
 }
 
-func newSimpleObjectWriter() *simpleObjectWriter {
+func NewSimpleObjectWriter() *SimpleObjectWriter {
-	return &simpleObjectWriter{
+	return &SimpleObjectWriter{
 		obj: object.NewRaw(),
 	}
 }
 
-func (s *simpleObjectWriter) WriteHeader(obj *object.Object) error {
+func (s *SimpleObjectWriter) WriteHeader(obj *object.Object) error {
 	s.obj = object.NewRawFromObject(obj)
 
 	s.pld = make([]byte, 0, obj.PayloadSize())
@@ -61,16 +57,12 @@ func (s *simpleObjectWriter) WriteHeader(obj *object.Object) error {
 	return nil
 }
 
-func (s *simpleObjectWriter) WriteChunk(p []byte) error {
+func (s *SimpleObjectWriter) WriteChunk(p []byte) error {
 	s.pld = append(s.pld, p...)
 	return nil
 }
 
-func (s *simpleObjectWriter) Close() error {
+func (s *SimpleObjectWriter) Object() *object.Object {
-	return nil
-}
-
-func (s *simpleObjectWriter) object() *object.Object {
 	if len(s.pld) > 0 {
 		s.obj.SetPayload(s.pld)
 	}
@@ -86,16 +78,24 @@ func (c *clientCacheWrapper) get(key *ecdsa.PrivateKey, addr string) (getClient,
 	}, err
 }
 
-func (c *clientWrapper) GetObject(ctx context.Context, p RangePrm) (*objectSDK.Object, error) {
+func (c *clientWrapper) getObject(exec *execCtx) (*objectSDK.Object, error) {
+	if exec.headOnly() {
+		return c.client.GetObjectHeader(exec.context(),
+			new(client.ObjectHeaderParams).
+				WithAddress(exec.address()).
+				WithRawFlag(exec.isRaw()),
+			exec.callOptions()...,
+		)
+	}
 	// we don't specify payload writer because we accumulate
 	// the object locally (even huge).
-	if p.rng != nil {
+	if rng := exec.ctxRange(); rng != nil {
-		data, err := c.client.ObjectPayloadRangeData(ctx,
+		data, err := c.client.ObjectPayloadRangeData(exec.context(),
 			new(client.RangeDataParams).
-				WithAddress(p.Address()).
+				WithAddress(exec.address()).
-				WithRange(p.rng).
+				WithRange(rng).
-				WithRaw(p.RawFlag()),
+				WithRaw(exec.isRaw()),
-			p.callOpts...,
+			exec.callOptions()...,
 		)
 		if err != nil {
 			return nil, err
@@ -103,22 +103,30 @@ func (c *clientWrapper) GetObject(ctx context.Context, p RangePrm) (*objectSDK.O
 
 		return payloadOnlyObject(data), nil
 	} else {
-		// we don't specify payload writer because we accumulate
+		return c.client.GetObject(exec.context(),
-		// the object locally (even huge).
-		return c.client.GetObject(ctx,
 			new(client.GetObjectParams).
-				WithAddress(p.Address()).
+				WithAddress(exec.address()).
-				WithRawFlag(p.RawFlag()),
+				WithRawFlag(exec.isRaw()),
-			p.callOpts...,
+			exec.callOptions()...,
 		)
 	}
 }
 
-func (e *storageEngineWrapper) Get(p RangePrm) (*object.Object, error) {
+func (e *storageEngineWrapper) get(exec *execCtx) (*object.Object, error) {
-	if p.rng != nil {
+	if exec.headOnly() {
+		r, err := e.engine.Head(new(engine.HeadPrm).
+			WithAddress(exec.address()).
+			WithRaw(exec.isRaw()),
+		)
+		if err != nil {
+			return nil, err
+		}
+
+		return r.Header(), nil
+	} else if rng := exec.ctxRange(); rng != nil {
 		r, err := e.engine.GetRange(new(engine.RngPrm).
-			WithAddress(p.Address()).
+			WithAddress(exec.address()).
-			WithPayloadRange(p.rng),
+			WithPayloadRange(rng),
 		)
 		if err != nil {
 			return nil, err
@@ -127,7 +135,7 @@ func (e *storageEngineWrapper) Get(p RangePrm) (*object.Object, error) {
 		return r.Object(), nil
 	} else {
 		r, err := e.engine.Get(new(engine.GetPrm).
-			WithAddress(p.Address()),
+			WithAddress(exec.address()),
 		)
 		if err != nil {
 			return nil, err
@@ -137,24 +145,14 @@ func (e *storageEngineWrapper) Get(p RangePrm) (*object.Object, error) {
 	}
 }
 
-func (s *headSvcWrapper) head(ctx context.Context, p Prm) (*object.Object, error) {
+func (w *partWriter) WriteChunk(p []byte) error {
-	r, err := s.svc.Head(ctx, new(headsvc.Prm).
-		WithAddress(p.Address()).
-		WithCommonPrm(p.common).
-		Short(false),
-	)
-
-	if err != nil {
-		return nil, err
-	}
-
-	return r.Header(), nil
-}
-
-func (w *rangeWriter) WriteChunk(p []byte) error {
 	return w.chunkWriter.WriteChunk(p)
 }
 
+func (w *partWriter) WriteHeader(o *object.Object) error {
+	return w.headWriter.WriteHeader(o)
+}
+
 func payloadOnlyObject(payload []byte) *objectSDK.Object {
 	rawObj := object.NewRaw()
 	rawObj.SetPayload(payload)

pkg/services/object/get/v2/service.go

@@ -91,6 +91,28 @@ func (s *Service) GetRangeHash(ctx context.Context, req *objectV2.GetRangeHashRe
 	return toHashResponse(req.GetBody().GetType(), res), nil
 }
 
+// Head serves NeoFS API v2 compatible HEAD requests.
+func (s *Service) Head(ctx context.Context, req *objectV2.HeadRequest) (*objectV2.HeadResponse, error) {
+	resp := new(objectV2.HeadResponse)
+	resp.SetBody(new(objectV2.HeadResponseBody))
+
+	p, err := s.toHeadPrm(req, resp)
+	if err != nil {
+		return nil, err
+	}
+
+	err = s.svc.Head(ctx, *p)
+
+	var splitErr *object.SplitInfoError
+
+	if errors.As(err, &splitErr) {
+		setSplitInfoHeadResponse(splitErr.SplitInfo(), resp)
+		err = nil
+	}
+
+	return resp, err
+}
+
 func WithInternalService(v *getsvc.Service) Option {
 	return func(c *cfg) {
 		c.svc = v

pkg/services/object/get/v2/util.go

@@ -6,11 +6,12 @@ import (
 
 	"github.com/nspcc-dev/neofs-api-go/pkg"
 	"github.com/nspcc-dev/neofs-api-go/pkg/client"
-	"github.com/nspcc-dev/neofs-api-go/pkg/object"
+	objectSDK "github.com/nspcc-dev/neofs-api-go/pkg/object"
 	"github.com/nspcc-dev/neofs-api-go/pkg/token"
 	objectV2 "github.com/nspcc-dev/neofs-api-go/v2/object"
 	"github.com/nspcc-dev/neofs-api-go/v2/refs"
 	"github.com/nspcc-dev/neofs-api-go/v2/session"
+	"github.com/nspcc-dev/neofs-node/pkg/core/object"
 	objectSvc "github.com/nspcc-dev/neofs-node/pkg/services/object"
 	getsvc "github.com/nspcc-dev/neofs-node/pkg/services/object/get"
 	"github.com/nspcc-dev/neofs-node/pkg/services/object/util"
@@ -30,7 +31,7 @@ func (s *Service) toPrm(req *objectV2.GetRequest, stream objectSvc.GetObjectStre
 	p.SetPrivateKey(key)
 
 	body := req.GetBody()
-	p.WithAddress(object.NewAddressFromV2(body.GetAddress()))
+	p.WithAddress(objectSDK.NewAddressFromV2(body.GetAddress()))
 	p.WithRawFlag(body.GetRaw())
 	p.SetRemoteCallOptions(remoteCallOptionsFromMeta(meta)...)
 	p.SetObjectWriter(&streamObjectWriter{stream})
@@ -53,11 +54,11 @@ func (s *Service) toRangePrm(req *objectV2.GetRangeRequest, stream objectSvc.Get
 	p.SetPrivateKey(key)
 
 	body := req.GetBody()
-	p.WithAddress(object.NewAddressFromV2(body.GetAddress()))
+	p.WithAddress(objectSDK.NewAddressFromV2(body.GetAddress()))
 	p.WithRawFlag(body.GetRaw())
 	p.SetRemoteCallOptions(remoteCallOptionsFromMeta(meta)...)
 	p.SetChunkWriter(&streamObjectRangeWriter{stream})
-	p.SetRange(object.NewRangeFromV2(body.GetRange()))
+	p.SetRange(objectSDK.NewRangeFromV2(body.GetRange()))
 	p.SetCommonParameters(commonParameters(meta))
 
 	return p, nil
@@ -75,15 +76,15 @@ func (s *Service) toHashRangePrm(req *objectV2.GetRangeHashRequest) (*getsvc.Ran
 	p.SetPrivateKey(key)
 
 	body := req.GetBody()
-	p.WithAddress(object.NewAddressFromV2(body.GetAddress()))
+	p.WithAddress(objectSDK.NewAddressFromV2(body.GetAddress()))
 	p.SetRemoteCallOptions(remoteCallOptionsFromMeta(meta)...)
 	p.SetCommonParameters(commonParameters(meta))
 
 	rngsV2 := body.GetRanges()
-	rngs := make([]*object.Range, 0, len(rngsV2))
+	rngs := make([]*objectSDK.Range, 0, len(rngsV2))
 
 	for i := range rngsV2 {
-		rngs = append(rngs, object.NewRangeFromV2(rngsV2[i]))
+		rngs = append(rngs, objectSDK.NewRangeFromV2(rngsV2[i]))
 	}
 
 	p.SetRangeList(rngs)
@@ -104,6 +105,46 @@ func (s *Service) toHashRangePrm(req *objectV2.GetRangeHashRequest) (*getsvc.Ran
 	return p, nil
 }
 
+type headResponseWriter struct {
+	mainOnly bool
+
+	body *objectV2.HeadResponseBody
+}
+
+func (w *headResponseWriter) WriteHeader(hdr *object.Object) error {
+	if w.mainOnly {
+		w.body.SetHeaderPart(toShortObjectHeader(hdr))
+	} else {
+		w.body.SetHeaderPart(toFullObjectHeader(hdr))
+	}
+
+	return nil
+}
+
+func (s *Service) toHeadPrm(req *objectV2.HeadRequest, resp *objectV2.HeadResponse) (*getsvc.HeadPrm, error) {
+	meta := req.GetMetaHeader()
+
+	key, err := s.keyStorage.GetKey(token.NewSessionTokenFromV2(meta.GetSessionToken()))
+	if err != nil {
+		return nil, err
+	}
+
+	p := new(getsvc.HeadPrm)
+	p.SetPrivateKey(key)
+
+	body := req.GetBody()
+	p.WithAddress(objectSDK.NewAddressFromV2(body.GetAddress()))
+	p.WithRawFlag(body.GetRaw())
+	p.SetRemoteCallOptions(remoteCallOptionsFromMeta(meta)...)
+	p.SetHeaderWriter(&headResponseWriter{
+		mainOnly: body.GetMainOnly(),
+		body:     resp.GetBody(),
+	})
+	p.SetCommonParameters(commonParameters(meta))
+
+	return p, nil
+}
+
 // can be shared accross all services
 func remoteCallOptionsFromMeta(meta *session.RequestMetaHeader) []client.CallOption {
 	xHdrs := meta.GetXHeaders()
@@ -128,7 +169,7 @@ func commonParameters(meta *session.RequestMetaHeader) *util.CommonPrm {
 		WithLocalOnly(meta.GetTTL() <= 1)
 }
 
-func splitInfoResponse(info *object.SplitInfo) *objectV2.GetResponse {
+func splitInfoResponse(info *objectSDK.SplitInfo) *objectV2.GetResponse {
 	resp := new(objectV2.GetResponse)
 
 	body := new(objectV2.GetResponseBody)
@@ -139,7 +180,7 @@ func splitInfoResponse(info *object.SplitInfo) *objectV2.GetResponse {
 	return resp
 }
 
-func splitInfoRangeResponse(info *object.SplitInfo) *objectV2.GetRangeResponse {
+func splitInfoRangeResponse(info *objectSDK.SplitInfo) *objectV2.GetRangeResponse {
 	resp := new(objectV2.GetRangeResponse)
 
 	body := new(objectV2.GetRangeResponseBody)
@@ -150,6 +191,10 @@ func splitInfoRangeResponse(info *object.SplitInfo) *objectV2.GetRangeResponse {
 	return resp
 }
 
+func setSplitInfoHeadResponse(info *objectSDK.SplitInfo, resp *objectV2.HeadResponse) {
+	resp.GetBody().SetHeaderPart(info.ToV2())
+}
+
 func toHashResponse(typ refs.ChecksumType, res *getsvc.RangeHashRes) *objectV2.GetRangeHashResponse {
 	resp := new(objectV2.GetRangeHashResponse)
 
@@ -161,3 +206,26 @@ func toHashResponse(typ refs.ChecksumType, res *getsvc.RangeHashRes) *objectV2.G
 
 	return resp
 }
+
+func toFullObjectHeader(hdr *object.Object) objectV2.GetHeaderPart {
+	obj := hdr.ToV2()
+
+	hs := new(objectV2.HeaderWithSignature)
+	hs.SetHeader(obj.GetHeader())
+	hs.SetSignature(obj.GetSignature())
+
+	return hs
+}
+
+func toShortObjectHeader(hdr *object.Object) objectV2.GetHeaderPart {
+	hdrV2 := hdr.ToV2().GetHeader()
+
+	sh := new(objectV2.ShortHeader)
+	sh.SetOwnerID(hdrV2.GetOwnerID())
+	sh.SetCreationEpoch(hdrV2.GetCreationEpoch())
+	sh.SetPayloadLength(hdrV2.GetPayloadLength())
+	sh.SetVersion(hdrV2.GetVersion())
+	sh.SetObjectType(hdrV2.GetObjectType())
+
+	return sh
+}