frostfs-s3-gw/api/layer/system_object.go

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package layer
import (
"context"
"encoding/xml"
"github.com/nspcc-dev/neofs-s3-gw/api/data"
"github.com/nspcc-dev/neofs-s3-gw/api/errors"
"github.com/nspcc-dev/neofs-sdk-go/object"
"github.com/nspcc-dev/neofs-sdk-go/object/address"
"go.uber.org/zap"
)
func (n *layer) putSystemObject(ctx context.Context, p *PutSystemObjectParams) (*data.ObjectInfo, error) {
objInfo, err := n.putSystemObjectIntoNeoFS(ctx, p)
if err != nil {
return nil, err
}
if err = n.systemCache.PutObject(systemObjectKey(p.BktInfo, p.ObjName), objInfo); err != nil {
n.log.Error("couldn't cache system object", zap.Error(err))
}
return objInfo, nil
}
func (n *layer) headSystemObject(ctx context.Context, bkt *data.BucketInfo, objName string) (*data.ObjectInfo, error) {
if objInfo := n.systemCache.GetObject(systemObjectKey(bkt, objName)); objInfo != nil {
return objInfo, nil
}
versions, err := n.headSystemVersions(ctx, bkt, objName)
if err != nil {
return nil, err
}
if err = n.systemCache.PutObject(systemObjectKey(bkt, objName), versions.getLast()); err != nil {
n.log.Error("couldn't cache system object", zap.Error(err))
}
return versions.getLast(), nil
}
func (n *layer) deleteSystemObject(ctx context.Context, bktInfo *data.BucketInfo, name string) error {
f := &findParams{
attr: [2]string{objectSystemAttributeName, name},
cid: bktInfo.CID,
}
ids, err := n.objectSearch(ctx, f)
if err != nil {
return err
}
n.systemCache.Delete(systemObjectKey(bktInfo, name))
for i := range ids {
if err = n.objectDelete(ctx, bktInfo.CID, &ids[i]); err != nil {
return err
}
}
return nil
}
func (n *layer) putSystemObjectIntoNeoFS(ctx context.Context, p *PutSystemObjectParams) (*data.ObjectInfo, error) {
versions, err := n.headSystemVersions(ctx, p.BktInfo, p.ObjName)
if err != nil && !errors.IsS3Error(err, errors.ErrNoSuchKey) {
return nil, err
}
idsToDeleteArr := updateCRDT2PSetHeaders(p.Metadata, versions, false) // false means "last write wins"
// note that updateCRDT2PSetHeaders modifies p.Metadata and must be called further processing
prm := PrmObjectCreate{
Container: *p.BktInfo.CID,
Creator: *p.BktInfo.Owner,
Attributes: make([][2]string, 2, 2+len(p.Metadata)),
Payload: p.Reader,
}
prm.Attributes[0][0], prm.Attributes[0][1] = objectSystemAttributeName, p.ObjName
prm.Attributes[1][0], prm.Attributes[1][1] = attrVersionsIgnore, "true"
for k, v := range p.Metadata {
if !IsSystemHeader(k) {
k = p.Prefix + k
}
if v == "" && p.Prefix == tagPrefix {
v = tagEmptyMark
}
prm.Attributes = append(prm.Attributes, [2]string{k, v})
}
id, err := n.neoFS.CreateObject(ctx, prm)
if err != nil {
return nil, n.transformNeofsError(ctx, err)
}
meta, err := n.objectHead(ctx, p.BktInfo.CID, id)
if err != nil {
return nil, err
}
for _, id := range idsToDeleteArr {
if err = n.objectDelete(ctx, p.BktInfo.CID, id); err != nil {
n.log.Warn("couldn't delete system object",
zap.Stringer("version id", id),
zap.String("name", p.ObjName),
zap.Error(err))
}
}
return objInfoFromMeta(p.BktInfo, meta), nil
}
func (n *layer) getSystemObjectFromNeoFS(ctx context.Context, bkt *data.BucketInfo, objName string) (*object.Object, error) {
versions, err := n.headSystemVersions(ctx, bkt, objName)
if err != nil {
return nil, err
}
objInfo := versions.getLast()
var addr address.Address
addr.SetContainerID(bkt.CID)
addr.SetObjectID(objInfo.ID)
obj, err := n.objectGet(ctx, &addr)
if err != nil {
return nil, err
}
if len(obj.Payload()) == 0 {
return nil, errors.GetAPIError(errors.ErrInternalError)
}
return obj, nil
}
func (n *layer) getCORS(ctx context.Context, bkt *data.BucketInfo, sysName string) (*data.CORSConfiguration, error) {
if cors := n.systemCache.GetCORS(systemObjectKey(bkt, sysName)); cors != nil {
return cors, nil
}
obj, err := n.getSystemObjectFromNeoFS(ctx, bkt, sysName)
if err != nil {
return nil, err
}
cors := &data.CORSConfiguration{}
if err = xml.Unmarshal(obj.Payload(), &cors); err != nil {
return nil, err
}
if err = n.systemCache.PutCORS(systemObjectKey(bkt, sysName), cors); err != nil {
n.log.Warn("couldn't put system meta to objects cache",
zap.Stringer("object id", obj.ID()),
zap.Stringer("bucket id", bkt.CID),
zap.Error(err))
}
return cors, nil
}
func (n *layer) headSystemVersions(ctx context.Context, bkt *data.BucketInfo, sysName string) (*objectVersions, error) {
f := &findParams{
attr: [2]string{objectSystemAttributeName, sysName},
cid: bkt.CID,
}
ids, err := n.objectSearch(ctx, f)
if err != nil {
return nil, err
}
versions := newObjectVersions(sysName)
for i := range ids {
meta, err := n.objectHead(ctx, bkt.CID, &ids[i])
if err != nil {
n.log.Warn("couldn't head object",
zap.Stringer("object id", &ids[i]),
zap.Stringer("bucket id", bkt.CID),
zap.Error(err))
continue
}
if oi := objInfoFromMeta(bkt, meta); oi != nil {
if !isSystem(oi) {
continue
}
versions.appendVersion(oi)
}
}
lastVersion := versions.getLast()
if lastVersion == nil {
return nil, errors.GetAPIError(errors.ErrNoSuchKey)
}
return versions, nil
}
// systemObjectKey is a key to use in SystemCache.
func systemObjectKey(bktInfo *data.BucketInfo, obj string) string {
return bktInfo.Name + obj
}