forked from TrueCloudLab/frostfs-s3-gw
499 lines
12 KiB
Go
499 lines
12 KiB
Go
package layer
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import (
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"context"
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"errors"
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"fmt"
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"io"
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"net/url"
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"sort"
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"strconv"
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"strings"
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"time"
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"github.com/nspcc-dev/neofs-api-go/pkg/client"
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cid "github.com/nspcc-dev/neofs-api-go/pkg/container/id"
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"github.com/nspcc-dev/neofs-api-go/pkg/object"
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apiErrors "github.com/nspcc-dev/neofs-s3-gw/api/errors"
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"go.uber.org/zap"
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)
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type (
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findParams struct {
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val string
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cid *cid.ID
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}
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getParams struct {
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io.Writer
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*object.Range
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offset int64
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length int64
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address *object.Address
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}
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// ListObjectsParamsCommon contains common parameters for ListObjectsV1 and ListObjectsV2.
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ListObjectsParamsCommon struct {
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Bucket string
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Delimiter string
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Encode string
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MaxKeys int
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Prefix string
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}
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// ListObjectsParamsV1 contains params for ListObjectsV1.
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ListObjectsParamsV1 struct {
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ListObjectsParamsCommon
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Marker string
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}
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// ListObjectsParamsV2 contains params for ListObjectsV2.
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ListObjectsParamsV2 struct {
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ListObjectsParamsCommon
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ContinuationToken string
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StartAfter string
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FetchOwner bool
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}
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allObjectParams struct {
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Bucket *BucketInfo
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Delimiter string
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Prefix string
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}
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)
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const (
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versionsDelAttr = "S3-Versions-del"
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versionsAddAttr = "S3-Versions-add"
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versionsDeleteMarkAttr = "S3-Versions-delete-mark"
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)
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// objectSearch returns all available objects by search params.
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func (n *layer) objectSearch(ctx context.Context, p *findParams) ([]*object.ID, error) {
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var opts object.SearchFilters
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opts.AddRootFilter()
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if filename, err := url.QueryUnescape(p.val); err != nil {
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return nil, err
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} else if filename != "" {
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opts.AddFilter(object.AttributeFileName, filename, object.MatchStringEqual)
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}
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return n.pool.SearchObject(ctx, new(client.SearchObjectParams).WithContainerID(p.cid).WithSearchFilters(opts), n.BearerOpt(ctx))
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}
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// objectFindID returns object id (uuid) based on it's nice name in s3. If
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// nice name is uuid compatible, then function returns it.
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func (n *layer) objectFindID(ctx context.Context, p *findParams) (*object.ID, error) {
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if result, err := n.objectSearch(ctx, p); err != nil {
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return nil, err
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} else if ln := len(result); ln == 0 {
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return nil, apiErrors.GetAPIError(apiErrors.ErrNoSuchKey)
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} else if ln == 1 {
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return result[0], nil
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}
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return nil, errors.New("several objects with the same name found")
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}
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// objectHead returns all object's headers.
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func (n *layer) objectHead(ctx context.Context, cid *cid.ID, oid *object.ID) (*object.Object, error) {
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address := object.NewAddress()
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address.SetContainerID(cid)
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address.SetObjectID(oid)
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ops := new(client.ObjectHeaderParams).WithAddress(address).WithAllFields()
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return n.pool.GetObjectHeader(ctx, ops, n.BearerOpt(ctx))
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}
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// objectGet and write it into provided io.Reader.
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func (n *layer) objectGet(ctx context.Context, p *getParams) (*object.Object, error) {
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// prepare length/offset writer
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w := newWriter(p.Writer, p.offset, p.length)
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ops := new(client.GetObjectParams).WithAddress(p.address).WithPayloadWriter(w)
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return n.pool.GetObject(ctx, ops, n.BearerOpt(ctx))
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}
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// objectRange gets object range and writes it into provided io.Writer.
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func (n *layer) objectRange(ctx context.Context, p *getParams) ([]byte, error) {
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w := newWriter(p.Writer, p.offset, p.length)
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ops := new(client.RangeDataParams).WithAddress(p.address).WithDataWriter(w).WithRange(p.Range)
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return n.pool.ObjectPayloadRangeData(ctx, ops, n.BearerOpt(ctx))
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}
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// objectPut into NeoFS, took payload from io.Reader.
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func (n *layer) objectPut(ctx context.Context, bkt *BucketInfo, p *PutObjectParams) (*ObjectInfo, error) {
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var (
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err error
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obj string
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own = n.Owner(ctx)
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)
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if p.Object == bktVersionSettingsObject {
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return nil, fmt.Errorf("trying put bucket settings object")
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}
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if obj, err = url.QueryUnescape(p.Object); err != nil {
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return nil, err
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}
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versioningEnabled := n.isVersioningEnabled(ctx, bkt)
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lastVersionInfo, err := n.headLastVersion(ctx, bkt, p.Object)
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if err != nil && !apiErrors.IsS3Error(err, apiErrors.ErrNoSuchKey) {
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return nil, err
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}
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attributes := make([]*object.Attribute, 0, len(p.Header)+1)
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var idsToDeleteArr []*object.ID
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if lastVersionInfo != nil {
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if versioningEnabled {
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versionsAddedStr := lastVersionInfo.Headers[versionsAddAttr]
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if len(versionsAddedStr) != 0 {
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versionsAddedStr += ","
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}
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versionsAddedStr += lastVersionInfo.ID().String()
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p.Header[versionsAddAttr] = versionsAddedStr
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deleted := p.Header[versionsDelAttr]
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if delVersions := lastVersionInfo.Headers[versionsDelAttr]; len(delVersions) != 0 {
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if len(deleted) == 0 {
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deleted = delVersions
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} else {
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deleted = delVersions + "," + deleted
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}
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}
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if len(deleted) != 0 {
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p.Header[versionsDelAttr] = deleted
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}
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} else {
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versionsDeletedStr := lastVersionInfo.Headers[versionsDelAttr]
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if len(versionsDeletedStr) != 0 {
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versionsDeletedStr += ","
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}
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versionsDeletedStr += lastVersionInfo.ID().String()
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p.Header[versionsDelAttr] = versionsDeletedStr
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idsToDeleteArr = append(idsToDeleteArr, lastVersionInfo.ID())
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}
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}
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filename := object.NewAttribute()
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filename.SetKey(object.AttributeFileName)
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filename.SetValue(obj)
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createdAt := object.NewAttribute()
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createdAt.SetKey(object.AttributeTimestamp)
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createdAt.SetValue(strconv.FormatInt(time.Now().UTC().Unix(), 10))
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attributes = append(attributes, filename, createdAt)
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for k, v := range p.Header {
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ua := object.NewAttribute()
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ua.SetKey(k)
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ua.SetValue(v)
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attributes = append(attributes, ua)
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}
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raw := object.NewRaw()
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raw.SetOwnerID(own)
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raw.SetContainerID(bkt.CID)
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raw.SetAttributes(attributes...)
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r := newDetector(p.Reader)
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ops := new(client.PutObjectParams).WithObject(raw.Object()).WithPayloadReader(r)
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oid, err := n.pool.PutObject(
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ctx,
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ops,
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n.BearerOpt(ctx),
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)
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if err != nil {
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return nil, err
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}
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meta, err := n.objectHead(ctx, bkt.CID, oid)
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if err != nil {
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return nil, err
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}
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if err = n.objCache.Put(addr, *meta); err != nil {
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n.log.Error("couldn't cache an object", zap.Error(err))
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}
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objInfo := &ObjectInfo{
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id: oid,
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Owner: own,
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Bucket: p.Bucket,
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Name: p.Object,
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Size: p.Size,
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Created: time.Now(),
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Headers: p.Header,
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ContentType: r.contentType,
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HashSum: meta.PayloadChecksum().String(),
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}
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for _, id := range idsToDeleteArr {
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if err = n.objectDelete(ctx, bkt.CID, id); err != nil {
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n.log.Warn("couldn't delete object",
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zap.Stringer("version id", id),
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zap.Error(err))
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}
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}
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return objInfo, nil
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}
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func (n *layer) headLastVersion(ctx context.Context, bkt *BucketInfo, objectName string) (*ObjectInfo, error) {
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ids, err := n.objectSearch(ctx, &findParams{cid: bkt.CID, val: objectName})
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if err != nil {
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return nil, err
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}
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if len(ids) == 0 {
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return nil, api.GetAPIError(api.ErrNoSuchKey)
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}
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infos := make([]*object.Object, 0, len(ids))
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for _, id := range ids {
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meta, err := n.objectHead(ctx, bkt.CID, id)
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if err != nil {
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n.log.Warn("couldn't head object",
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zap.Stringer("object id", id),
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zap.Stringer("bucket id", bkt.CID),
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zap.Error(err))
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continue
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}
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infos = append(infos, meta)
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}
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sort.Slice(infos, func(i, j int) bool {
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return infos[i].CreationEpoch() < infos[j].CreationEpoch() || (infos[i].CreationEpoch() == infos[j].CreationEpoch() && infos[i].ID().String() < infos[j].ID().String())
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})
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return objectInfoFromMeta(bkt, infos[len(infos)-1], "", ""), nil
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}
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func (n *layer) headVersion(ctx context.Context, bkt *BucketInfo, versionID string) (*ObjectInfo, error) {
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oid := object.NewID()
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if err := oid.Parse(versionID); err != nil {
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return nil, err
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}
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meta, err := n.objectHead(ctx, bkt.CID, oid)
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if err != nil {
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if strings.Contains(err.Error(), "not found") {
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return nil, api.GetAPIError(api.ErrNoSuchVersion)
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}
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return nil, err
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}
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return objectInfoFromMeta(bkt, meta, "", ""), nil
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}
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// objectDelete puts tombstone object into neofs.
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func (n *layer) objectDelete(ctx context.Context, cid *cid.ID, oid *object.ID) error {
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address := object.NewAddress()
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address.SetContainerID(cid)
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address.SetObjectID(oid)
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dop := new(client.DeleteObjectParams)
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dop.WithAddress(address)
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n.objCache.Delete(address)
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return n.pool.DeleteObject(ctx, dop, n.BearerOpt(ctx))
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}
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// ListObjectsV1 returns objects in a bucket for requests of Version 1.
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func (n *layer) ListObjectsV1(ctx context.Context, p *ListObjectsParamsV1) (*ListObjectsInfoV1, error) {
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var (
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err error
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result ListObjectsInfoV1
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allObjects []*ObjectInfo
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)
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if p.MaxKeys == 0 {
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return &result, nil
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}
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if allObjects, err = n.listAllObjects(ctx, p.ListObjectsParamsCommon); err != nil {
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return nil, err
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}
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if len(allObjects) == 0 {
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return &result, nil
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}
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if p.Marker != "" {
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allObjects = trimAfterObjectName(p.Marker, allObjects)
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}
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if len(allObjects) > p.MaxKeys {
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result.IsTruncated = true
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allObjects = allObjects[:p.MaxKeys]
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result.NextMarker = allObjects[len(allObjects)-1].Name
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}
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result.Prefixes, result.Objects = triageObjects(allObjects)
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return &result, nil
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}
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// ListObjectsV2 returns objects in a bucket for requests of Version 2.
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func (n *layer) ListObjectsV2(ctx context.Context, p *ListObjectsParamsV2) (*ListObjectsInfoV2, error) {
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var (
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err error
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result ListObjectsInfoV2
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allObjects []*ObjectInfo
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)
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if p.MaxKeys == 0 {
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return &result, nil
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}
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if allObjects, err = n.listAllObjects(ctx, p.ListObjectsParamsCommon); err != nil {
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return nil, err
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}
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if len(allObjects) == 0 {
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return &result, nil
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}
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if p.ContinuationToken != "" {
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allObjects = trimAfterObjectID(p.ContinuationToken, allObjects)
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}
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if p.StartAfter != "" {
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allObjects = trimAfterObjectName(p.StartAfter, allObjects)
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}
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if len(allObjects) > p.MaxKeys {
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result.IsTruncated = true
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allObjects = allObjects[:p.MaxKeys]
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result.NextContinuationToken = allObjects[len(allObjects)-1].id.String()
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}
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result.Prefixes, result.Objects = triageObjects(allObjects)
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return &result, nil
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}
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func (n *layer) listSortedObjectsFromNeoFS(ctx context.Context, p allObjectParams) ([]*ObjectInfo, error) {
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var (
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err error
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ids []*object.ID
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uniqNames = make(map[string]bool)
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)
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if ids, err = n.objectSearch(ctx, &findParams{cid: p.Bucket.CID}); err != nil {
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return nil, err
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}
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objects := make([]*ObjectInfo, 0, len(ids))
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for _, id := range ids {
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meta, err := n.objectHead(ctx, p.Bucket.CID, id)
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if err != nil {
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n.log.Warn("could not fetch object meta", zap.Error(err))
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continue
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}
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if oi := objectInfoFromMeta(p.Bucket, meta, p.Prefix, p.Delimiter); oi != nil {
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// use only unique dir names
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if _, ok := uniqNames[oi.Name]; ok {
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continue
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}
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uniqNames[oi.Name] = oi.isDir
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objects = append(objects, oi)
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}
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}
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sort.Slice(objects, func(i, j int) bool {
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return objects[i].Name < objects[j].Name
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})
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return objects, nil
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}
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func trimAfterObjectName(startAfter string, objects []*ObjectInfo) []*ObjectInfo {
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if len(objects) != 0 && objects[len(objects)-1].Name <= startAfter {
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return nil
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}
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for i := range objects {
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if objects[i].Name > startAfter {
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return objects[i:]
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}
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}
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return nil
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}
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func trimAfterObjectID(id string, objects []*ObjectInfo) []*ObjectInfo {
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if len(objects) != 0 && objects[len(objects)-1].id.String() == id {
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return []*ObjectInfo{}
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}
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for i, obj := range objects {
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if obj.ID().String() == id {
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return objects[i+1:]
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}
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}
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return nil
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}
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func triageObjects(allObjects []*ObjectInfo) (prefixes []string, objects []*ObjectInfo) {
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for _, ov := range allObjects {
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if ov.isDir {
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prefixes = append(prefixes, ov.Name)
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} else {
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objects = append(objects, ov)
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}
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}
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return
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}
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func (n *layer) listAllObjects(ctx context.Context, p ListObjectsParamsCommon) ([]*ObjectInfo, error) {
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var (
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err error
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bkt *BucketInfo
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cacheKey cacheOptions
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allObjects []*ObjectInfo
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)
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if bkt, err = n.GetBucketInfo(ctx, p.Bucket); err != nil {
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return nil, err
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}
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if cacheKey, err = createKey(ctx, bkt.CID, p.Prefix, p.Delimiter); err != nil {
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return nil, err
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}
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allObjects = n.listObjCache.Get(cacheKey)
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if allObjects == nil {
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allObjects, err = n.listSortedObjectsFromNeoFS(ctx, allObjectParams{
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Bucket: bkt,
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Prefix: p.Prefix,
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Delimiter: p.Delimiter,
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})
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if err != nil {
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return nil, err
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}
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// putting to cache a copy of allObjects because allObjects can be modified further
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n.listObjCache.Put(cacheKey, append([]*ObjectInfo(nil), allObjects...))
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}
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return allObjects, nil
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}
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func (n *layer) isVersioningEnabled(ctx context.Context, bktInfo *BucketInfo) bool {
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settings, err := n.getBucketSettings(ctx, bktInfo)
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if err != nil {
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n.log.Warn("couldn't get versioning settings object", zap.Error(err))
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return false
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}
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return settings.VersioningEnabled
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}
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