[#208] searchsvc: Refactor request forwarding

Resolve funlen & gocognit linters for toPrm method.

Signed-off-by: Dmitrii Stepanov <d.stepanov@yadro.com>

pkg/services/object/search/prm.go

@@ -1,6 +1,8 @@
 package searchsvc
 
 import (
+	"context"
+
 	coreclient "git.frostfs.info/TrueCloudLab/frostfs-node/pkg/core/client"
 	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/services/object/util"
 	cid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container/id"
@@ -29,7 +31,7 @@ type IDListWriter interface {
 
 // RequestForwarder is a callback for forwarding of the
 // original Search requests.
-type RequestForwarder func(coreclient.NodeInfo, coreclient.MultiAddressClient) ([]oid.ID, error)
+type RequestForwarder func(context.Context, coreclient.NodeInfo, coreclient.MultiAddressClient) ([]oid.ID, error)
 
 // SetCommonParameters sets common parameters of the operation.
 func (p *Prm) SetCommonParameters(common *util.CommonPrm) {

pkg/services/object/search/util.go

@@ -80,7 +80,7 @@ func (c *clientConstructorWrapper) get(info client.NodeInfo) (searchClient, erro
 
 func (c *clientWrapper) searchObjects(ctx context.Context, exec *execCtx, info client.NodeInfo) ([]oid.ID, error) {
 	if exec.prm.forwarder != nil {
-		return exec.prm.forwarder(info, c.client)
+		return exec.prm.forwarder(ctx, info, c.client)
 	}
 
 	var sessionInfo *util.SessionInfo

pkg/services/object/search/v2/request_forwarder.go

@@ -0,0 +1,99 @@
+package searchsvc
+
+import (
+	"context"
+	"crypto/ecdsa"
+	"errors"
+	"fmt"
+	"io"
+	"sync"
+
+	objectV2 "git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/object"
+	"git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/rpc"
+	rpcclient "git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/rpc/client"
+	"git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/session"
+	"git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/signature"
+	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/core/client"
+	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/network"
+	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/services/object/internal"
+	oid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id"
+)
+
+type requestForwarder struct {
+	OnceResign *sync.Once
+	Request    *objectV2.SearchRequest
+	Key        *ecdsa.PrivateKey
+}
+
+func (f *requestForwarder) forwardRequest(ctx context.Context, addr network.Address, c client.MultiAddressClient, pubkey []byte) ([]oid.ID, error) {
+	var err error
+
+	// once compose and resign forwarding request
+	f.OnceResign.Do(func() {
+		// compose meta header of the local server
+		metaHdr := new(session.RequestMetaHeader)
+		metaHdr.SetTTL(f.Request.GetMetaHeader().GetTTL() - 1)
+		// TODO: #1165 think how to set the other fields
+		metaHdr.SetOrigin(f.Request.GetMetaHeader())
+
+		f.Request.SetMetaHeader(metaHdr)
+
+		err = signature.SignServiceMessage(f.Key, f.Request)
+	})
+
+	if err != nil {
+		return nil, err
+	}
+
+	var searchStream *rpc.SearchResponseReader
+	err = c.RawForAddress(addr, func(cli *rpcclient.Client) error {
+		searchStream, err = rpc.SearchObjects(cli, f.Request, rpcclient.WithContext(ctx))
+		return err
+	})
+	if err != nil {
+		return nil, err
+	}
+
+	// code below is copy-pasted from c.SearchObjects implementation,
+	// perhaps it is worth highlighting the utility function in frostfs-api-go
+	var (
+		searchResult []oid.ID
+		resp         = new(objectV2.SearchResponse)
+	)
+
+	for {
+		// receive message from server stream
+		err := searchStream.Read(resp)
+		if err != nil {
+			if errors.Is(err, io.EOF) {
+				break
+			}
+
+			return nil, fmt.Errorf("reading the response failed: %w", err)
+		}
+
+		// verify response key
+		if err = internal.VerifyResponseKeyV2(pubkey, resp); err != nil {
+			return nil, err
+		}
+
+		// verify response structure
+		if err := signature.VerifyServiceMessage(resp); err != nil {
+			return nil, fmt.Errorf("could not verify %T: %w", resp, err)
+		}
+
+		chunk := resp.GetBody().GetIDList()
+		var id oid.ID
+
+		for i := range chunk {
+			err = id.ReadFromV2(chunk[i])
+			if err != nil {
+				return nil, fmt.Errorf("invalid object ID: %w", err)
+			}
+
+			searchResult = append(searchResult, id)
+		}
+	}
+
+	return searchResult, nil
+}

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

@@ -1,20 +1,15 @@
 package searchsvc
 
 import (
+	"context"
 	"errors"
 	"fmt"
-	"io"
 	"sync"
 
 	objectV2 "git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/object"
-	"git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/rpc"
-	rpcclient "git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/rpc/client"
-	"git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/session"
-	"git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/signature"
 	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/core/client"
 	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/network"
 	objectSvc "git.frostfs.info/TrueCloudLab/frostfs-node/pkg/services/object"
-	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/services/object/internal"
 	searchsvc "git.frostfs.info/TrueCloudLab/frostfs-node/pkg/services/object/search"
 	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/services/object/util"
 	cid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container/id"
@@ -22,7 +17,6 @@ import (
 	oid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id"
 )
 
-// nolint: funlen, gocognit
 func (s *Service) toPrm(req *objectV2.SearchRequest, stream objectSvc.SearchStream) (*searchsvc.Prm, error) {
 	body := req.GetBody()
 
@@ -38,8 +32,6 @@ func (s *Service) toPrm(req *objectV2.SearchRequest, stream objectSvc.SearchStre
 		return nil, fmt.Errorf("invalid container ID: %w", err)
 	}
 
-	meta := req.GetMetaHeader()
-
 	commonPrm, err := util.CommonPrmFromV2(req)
 	if err != nil {
 		return nil, err
@@ -53,85 +45,18 @@ func (s *Service) toPrm(req *objectV2.SearchRequest, stream objectSvc.SearchStre
 	})
 
 	if !commonPrm.LocalOnly() {
-		var onceResign sync.Once
-
 		key, err := s.keyStorage.GetKey(nil)
 		if err != nil {
 			return nil, err
 		}
 
-		p.SetRequestForwarder(groupAddressRequestForwarder(func(addr network.Address, c client.MultiAddressClient, pubkey []byte) ([]oid.ID, error) {
+		forwarder := &requestForwarder{
-			var err error
+			OnceResign: &sync.Once{},
+			Request:    req,
+			Key:        key,
+		}
 
-			// once compose and resign forwarding request
+		p.SetRequestForwarder(groupAddressRequestForwarder(forwarder.forwardRequest))
-			onceResign.Do(func() {
-				// compose meta header of the local server
-				metaHdr := new(session.RequestMetaHeader)
-				metaHdr.SetTTL(meta.GetTTL() - 1)
-				// TODO: #1165 think how to set the other fields
-				metaHdr.SetOrigin(meta)
-
-				req.SetMetaHeader(metaHdr)
-
-				err = signature.SignServiceMessage(key, req)
-			})
-
-			if err != nil {
-				return nil, err
-			}
-
-			var searchStream *rpc.SearchResponseReader
-			err = c.RawForAddress(addr, func(cli *rpcclient.Client) error {
-				searchStream, err = rpc.SearchObjects(cli, req, rpcclient.WithContext(stream.Context()))
-				return err
-			})
-			if err != nil {
-				return nil, err
-			}
-
-			// code below is copy-pasted from c.SearchObjects implementation,
-			// perhaps it is worth highlighting the utility function in frostfs-api-go
-			var (
-				searchResult []oid.ID
-				resp         = new(objectV2.SearchResponse)
-			)
-
-			for {
-				// receive message from server stream
-				err := searchStream.Read(resp)
-				if err != nil {
-					if errors.Is(err, io.EOF) {
-						break
-					}
-
-					return nil, fmt.Errorf("reading the response failed: %w", err)
-				}
-
-				// verify response key
-				if err = internal.VerifyResponseKeyV2(pubkey, resp); err != nil {
-					return nil, err
-				}
-
-				// verify response structure
-				if err := signature.VerifyServiceMessage(resp); err != nil {
-					return nil, fmt.Errorf("could not verify %T: %w", resp, err)
-				}
-
-				chunk := resp.GetBody().GetIDList()
-				var id oid.ID
-
-				for i := range chunk {
-					err = id.ReadFromV2(chunk[i])
-					if err != nil {
-						return nil, fmt.Errorf("invalid object ID: %w", err)
-					}
-
-					searchResult = append(searchResult, id)
-				}
-			}
-
-			return searchResult, nil
-		}))
 	}
 
 	p.WithContainerID(id)
@@ -140,8 +65,8 @@ func (s *Service) toPrm(req *objectV2.SearchRequest, stream objectSvc.SearchStre
 	return p, nil
 }
 
-func groupAddressRequestForwarder(f func(network.Address, client.MultiAddressClient, []byte) ([]oid.ID, error)) searchsvc.RequestForwarder {
+func groupAddressRequestForwarder(f func(context.Context, network.Address, client.MultiAddressClient, []byte) ([]oid.ID, error)) searchsvc.RequestForwarder {
-	return func(info client.NodeInfo, c client.MultiAddressClient) ([]oid.ID, error) {
+	return func(ctx context.Context, info client.NodeInfo, c client.MultiAddressClient) ([]oid.ID, error) {
 		var (
 			firstErr error
 			res      []oid.ID
@@ -162,7 +87,7 @@ func groupAddressRequestForwarder(f func(network.Address, client.MultiAddressCli
 				// would be nice to log otherwise
 			}()
 
-			res, err = f(addr, c, key)
+			res, err = f(ctx, addr, c, key)
 
 			return
 		})