[#135] frostfs: Add SEARCH operation

Signed-off-by: Denis Kirillov <d.kirillov@yadro.com>

api/data/info.go

@@ -43,6 +43,7 @@ type (
 		Size          uint64
 		ContentType   string
 		Created       time.Time
+		CreationEpoch uint64
 		HashSum       string
 		Owner         user.ID
 		Headers       map[string]string

api/layer/frostfs.go

@@ -128,6 +128,22 @@ type PrmObjectDelete struct {
 	Object oid.ID
 }
 
+// PrmObjectSearch groups parameters of FrostFS.sear SearchObjects operation.
+type PrmObjectSearch struct {
+	// Authentication parameters.
+	PrmAuth
+
+	// Container to select the objects from.
+	Container cid.ID
+
+	// Key-value object attribute which should be
+	// presented in selected objects. Optional, empty key means any.
+	ExactAttribute [2]string
+
+	// File prefix of the selected objects. Optional, empty value means any.
+	FilePrefix string
+}
+
 var (
 	// ErrAccessDenied is returned from FrostFS in case of access violation.
 	ErrAccessDenied = errors.New("access denied")
@@ -215,6 +231,15 @@ type FrostFS interface {
 	// It returns any error encountered which prevented the removal request from being sent.
 	DeleteObject(context.Context, PrmObjectDelete) error
 
+	// SearchObjects performs object search from the NeoFS container according
+	// to the specified parameters. It searches user's objects only.
+	//
+	// It returns ErrAccessDenied on selection access violation.
+	//
+	// It returns exactly one non-nil value. It returns any error encountered which
+	// prevented the objects from being selected.
+	SearchObjects(context.Context, PrmObjectSearch) ([]oid.ID, error)
+
 	// TimeToEpoch computes current epoch and the epoch that corresponds to the provided now and future time.
 	// Note:
 	// * future time must be after the now

api/layer/util.go

@@ -95,6 +95,7 @@ func objectInfoFromMeta(bkt *data.BucketInfo, meta *object.Object) *data.ObjectI
 		Headers:       headers,
 		Owner:         *meta.OwnerID(),
 		Size:          meta.PayloadSize(),
+		CreationEpoch: meta.CreationEpoch(),
 		HashSum:       hex.EncodeToString(payloadChecksum.Value()),
 	}
 }

internal/frostfs/frostfs.go

@@ -1,7 +1,6 @@
 package frostfs
 
 import (
-	"bytes"
 	"context"
 	"errors"
 	"fmt"
@@ -12,8 +11,6 @@ import (
 
 	objectv2 "git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/object"
 	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/layer"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/authmate"
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/creds/tokens"
 	errorsFrost "git.frostfs.info/TrueCloudLab/frostfs-s3-gw/internal/frostfs/errors"
 	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container"
 	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container/acl"
@@ -380,6 +377,43 @@ func (x *FrostFS) DeleteObject(ctx context.Context, prm layer.PrmObjectDelete) e
 	return handleObjectError("mark object removal via connection pool", err)
 }
 
+// SearchObjects implements frostfs.FrostFS interface method.
+func (x *FrostFS) SearchObjects(ctx context.Context, prm layer.PrmObjectSearch) ([]oid.ID, error) {
+	filters := object.NewSearchFilters()
+	filters.AddRootFilter()
+
+	if prm.ExactAttribute[0] != "" {
+		filters.AddFilter(prm.ExactAttribute[0], prm.ExactAttribute[1], object.MatchStringEqual)
+	}
+
+	if prm.FilePrefix != "" {
+		filters.AddFilter(object.AttributeFileName, prm.FilePrefix, object.MatchCommonPrefix)
+	}
+
+	var prmSearch pool.PrmObjectSearch
+	prmSearch.SetContainerID(prm.Container)
+	prmSearch.SetFilters(filters)
+
+	if prm.BearerToken != nil {
+		prmSearch.UseBearer(*prm.BearerToken)
+	} else {
+		prmSearch.UseKey(prm.PrivateKey)
+	}
+
+	res, err := x.pool.SearchObjects(ctx, prmSearch)
+	if err != nil {
+		return nil, handleObjectError("init object search via connection pool", err)
+	}
+	defer res.Close()
+
+	var buf []oid.ID
+	err = res.Iterate(func(id oid.ID) bool {
+		buf = append(buf, id)
+		return false
+	})
+	return buf, handleObjectError("read object list", err)
+}
+
 // ResolverFrostFS represents virtual connection to the FrostFS network.
 // It implements resolver.FrostFS.
 type ResolverFrostFS struct {
@@ -422,73 +456,6 @@ func handleObjectError(msg string, err error) error {
 	return fmt.Errorf("%s: %w", msg, err)
 }
 
-// AuthmateFrostFS is a mediator which implements authmate.FrostFS through pool.Pool.
-type AuthmateFrostFS struct {
-	frostFS *FrostFS
-}
-
-// NewAuthmateFrostFS creates new AuthmateFrostFS using provided pool.Pool.
-func NewAuthmateFrostFS(p *pool.Pool) *AuthmateFrostFS {
-	return &AuthmateFrostFS{frostFS: NewFrostFS(p)}
-}
-
-// ContainerExists implements authmate.FrostFS interface method.
-func (x *AuthmateFrostFS) ContainerExists(ctx context.Context, idCnr cid.ID) error {
-	_, err := x.frostFS.Container(ctx, idCnr)
-	if err != nil {
-		return fmt.Errorf("get container via connection pool: %w", err)
-	}
-
-	return nil
-}
-
-// TimeToEpoch implements authmate.FrostFS interface method.
-func (x *AuthmateFrostFS) TimeToEpoch(ctx context.Context, futureTime time.Time) (uint64, uint64, error) {
-	return x.frostFS.TimeToEpoch(ctx, time.Now(), futureTime)
-}
-
-// CreateContainer implements authmate.FrostFS interface method.
-func (x *AuthmateFrostFS) CreateContainer(ctx context.Context, prm authmate.PrmContainerCreate) (cid.ID, error) {
-	basicACL := acl.Private
-	// allow reading objects to OTHERS in order to provide read access to S3 gateways
-	basicACL.AllowOp(acl.OpObjectGet, acl.RoleOthers)
-
-	return x.frostFS.CreateContainer(ctx, layer.PrmContainerCreate{
-		Creator:  prm.Owner,
-		Policy:   prm.Policy,
-		Name:     prm.FriendlyName,
-		BasicACL: basicACL,
-	})
-}
-
-// ReadObjectPayload implements authmate.FrostFS interface method.
-func (x *AuthmateFrostFS) ReadObjectPayload(ctx context.Context, addr oid.Address) ([]byte, error) {
-	res, err := x.frostFS.ReadObject(ctx, layer.PrmObjectRead{
-		Container:   addr.Container(),
-		Object:      addr.Object(),
-		WithPayload: true,
-	})
-	if err != nil {
-		return nil, err
-	}
-
-	defer res.Payload.Close()
-
-	return io.ReadAll(res.Payload)
-}
-
-// CreateObject implements authmate.FrostFS interface method.
-func (x *AuthmateFrostFS) CreateObject(ctx context.Context, prm tokens.PrmObjectCreate) (oid.ID, error) {
-	return x.frostFS.CreateObject(ctx, layer.PrmObjectCreate{
-		Creator:   prm.Creator,
-		Container: prm.Container,
-		Filepath:  prm.Filepath,
-		Attributes: [][2]string{
-			{objectv2.SysAttributeExpEpoch, strconv.FormatUint(prm.ExpirationEpoch, 10)}},
-		Payload: bytes.NewReader(prm.Payload),
-	})
-}
-
 // PoolStatistic is a mediator which implements authmate.FrostFS through pool.Pool.
 type PoolStatistic struct {
 	pool *pool.Pool