package layer import ( "context" "sort" "strconv" "strings" "github.com/nspcc-dev/neofs-api-go/pkg/object" "github.com/nspcc-dev/neofs-s3-gw/api" "github.com/nspcc-dev/neofs-s3-gw/api/errors" ) type objectVersions struct { name string objects []*api.ObjectInfo addList []string delList []string isSorted bool } const ( unversionedObjectVersionID = "null" objectSystemAttributeName = "S3-System-name" attrVersionsIgnore = "S3-Versions-ignore" attrSettingsVersioningEnabled = "S3-Settings-Versioning-enabled" versionsDelAttr = "S3-Versions-del" versionsAddAttr = "S3-Versions-add" versionsDeleteMarkAttr = "S3-Versions-delete-mark" delMarkFullObject = "*" ) func newObjectVersions(name string) *objectVersions { return &objectVersions{name: name} } func (v *objectVersions) appendVersion(oi *api.ObjectInfo) { addVers := append(splitVersions(oi.Headers[versionsAddAttr]), oi.Version()) delVers := splitVersions(oi.Headers[versionsDelAttr]) v.objects = append(v.objects, oi) for _, add := range addVers { if !contains(v.addList, add) { v.addList = append(v.addList, add) } } for _, del := range delVers { if !contains(v.delList, del) { v.delList = append(v.delList, del) } } v.isSorted = false } func (v *objectVersions) sort() { if !v.isSorted { sort.Slice(v.objects, func(i, j int) bool { return less(v.objects[i], v.objects[j]) }) v.isSorted = true } } func (v *objectVersions) getLast() *api.ObjectInfo { if len(v.objects) == 0 { return nil } v.sort() existedVersions := getExistedVersions(v) for i := len(v.objects) - 1; i >= 0; i-- { if contains(existedVersions, v.objects[i].Version()) { delMarkHeader := v.objects[i].Headers[versionsDeleteMarkAttr] if delMarkHeader == "" { return v.objects[i] } if delMarkHeader == delMarkFullObject { return nil } } } return nil } func (v *objectVersions) getFiltered() []*api.ObjectInfo { if len(v.objects) == 0 { return nil } v.sort() existedVersions := getExistedVersions(v) res := make([]*api.ObjectInfo, 0, len(v.objects)) for _, version := range v.objects { delMark := version.Headers[versionsDeleteMarkAttr] if contains(existedVersions, version.Version()) && (delMark == delMarkFullObject || delMark == "") { res = append(res, version) } } return res } func (v *objectVersions) getAddHeader() string { return strings.Join(v.addList, ",") } func (v *objectVersions) getDelHeader() string { return strings.Join(v.delList, ",") } func (v *objectVersions) getVersion(oid *object.ID) *api.ObjectInfo { for _, version := range v.objects { if version.ID == oid { return version } } return nil } func (n *layer) PutBucketVersioning(ctx context.Context, p *PutVersioningParams) (*api.ObjectInfo, error) { bktInfo, err := n.GetBucketInfo(ctx, p.Bucket) if err != nil { return nil, err } metadata := map[string]string{ attrSettingsVersioningEnabled: strconv.FormatBool(p.Settings.VersioningEnabled), } meta, err := n.putSystemObject(ctx, bktInfo, bktInfo.SettingsObjectName(), metadata, "") if err != nil { return nil, err } return objInfoFromMeta(bktInfo, meta), nil } func (n *layer) GetBucketVersioning(ctx context.Context, bucketName string) (*BucketSettings, error) { bktInfo, err := n.GetBucketInfo(ctx, bucketName) if err != nil { return nil, err } return n.getBucketSettings(ctx, bktInfo) } func (n *layer) ListObjectVersions(ctx context.Context, p *ListObjectVersionsParams) (*ListObjectVersionsInfo, error) { var versions map[string]*objectVersions res := &ListObjectVersionsInfo{} bkt, err := n.GetBucketInfo(ctx, p.Bucket) if err != nil { return nil, err } cacheKey, err := createKey(bkt.CID, listVersionsMethod, p.Prefix, p.Delimiter) if err != nil { return nil, err } allObjects := n.listsCache.Get(cacheKey) if allObjects == nil { versions, err = n.getAllObjectsVersions(ctx, bkt, p.Prefix, p.Delimiter) if err != nil { return nil, err } sortedNames := make([]string, 0, len(versions)) for k := range versions { sortedNames = append(sortedNames, k) } sort.Strings(sortedNames) allObjects = make([]*api.ObjectInfo, 0, p.MaxKeys) for _, name := range sortedNames { allObjects = append(allObjects, versions[name].getFiltered()...) } // putting to cache a copy of allObjects because allObjects can be modified further n.listsCache.Put(cacheKey, append([]*api.ObjectInfo(nil), allObjects...)) } for i, obj := range allObjects { if obj.Name >= p.KeyMarker && obj.Version() >= p.VersionIDMarker { allObjects = allObjects[i:] break } } res.CommonPrefixes, allObjects = triageObjects(allObjects) if len(allObjects) > p.MaxKeys { res.IsTruncated = true res.NextKeyMarker = allObjects[p.MaxKeys].Name res.NextVersionIDMarker = allObjects[p.MaxKeys].Version() allObjects = allObjects[:p.MaxKeys] res.KeyMarker = allObjects[p.MaxKeys-1].Name res.VersionIDMarker = allObjects[p.MaxKeys-1].Version() } objects := make([]*ObjectVersionInfo, len(allObjects)) for i, obj := range allObjects { objects[i] = &ObjectVersionInfo{Object: obj} if i == len(allObjects)-1 || allObjects[i+1].Name != obj.Name { objects[i].IsLatest = true } } res.Version, res.DeleteMarker = triageVersions(objects) return res, nil } func triageVersions(objVersions []*ObjectVersionInfo) ([]*ObjectVersionInfo, []*ObjectVersionInfo) { if len(objVersions) == 0 { return nil, nil } var resVersion []*ObjectVersionInfo var resDelMarkVersions []*ObjectVersionInfo for _, version := range objVersions { if version.Object.Headers[versionsDeleteMarkAttr] == delMarkFullObject { resDelMarkVersions = append(resDelMarkVersions, version) } else { resVersion = append(resVersion, version) } } return resVersion, resDelMarkVersions } func less(ov1, ov2 *api.ObjectInfo) bool { if ov1.CreationEpoch == ov2.CreationEpoch { return ov1.Version() < ov2.Version() } return ov1.CreationEpoch < ov2.CreationEpoch } func contains(list []string, elem string) bool { for _, item := range list { if elem == item { return true } } return false } func (n *layer) getBucketSettings(ctx context.Context, bktInfo *api.BucketInfo) (*BucketSettings, error) { objInfo, err := n.getSystemObject(ctx, bktInfo, bktInfo.SettingsObjectName()) if err != nil { return nil, err } return objectInfoToBucketSettings(objInfo), nil } func objectInfoToBucketSettings(info *api.ObjectInfo) *BucketSettings { res := &BucketSettings{} enabled, ok := info.Headers[attrSettingsVersioningEnabled] if ok { if parsed, err := strconv.ParseBool(enabled); err == nil { res.VersioningEnabled = parsed } } return res } func (n *layer) checkVersionsExist(ctx context.Context, bkt *api.BucketInfo, obj *VersionedObject) (*object.ID, error) { id := object.NewID() if err := id.Parse(obj.VersionID); err != nil { return nil, errors.GetAPIError(errors.ErrInvalidVersion) } versions, err := n.headVersions(ctx, bkt, obj.Name) if err != nil { return nil, err } if !contains(getExistedVersions(versions), obj.VersionID) { return nil, errors.GetAPIError(errors.ErrInvalidVersion) } return id, nil }