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

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package layer
import (
"context"
"crypto/ecdsa"
"errors"
"fmt"
"io"
"net/url"
"sort"
"strings"
"time"
"github.com/nspcc-dev/neofs-api-go/pkg/client"
cid "github.com/nspcc-dev/neofs-api-go/pkg/container/id"
"github.com/nspcc-dev/neofs-api-go/pkg/netmap"
"github.com/nspcc-dev/neofs-api-go/pkg/object"
"github.com/nspcc-dev/neofs-api-go/pkg/owner"
"github.com/nspcc-dev/neofs-s3-gw/api"
"github.com/nspcc-dev/neofs-s3-gw/creds/accessbox"
"github.com/nspcc-dev/neofs-sdk-go/pkg/pool"
"go.uber.org/zap"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/status"
)
type (
layer struct {
pool pool.Pool
log *zap.Logger
}
// Params stores basic API parameters.
Params struct {
Pool pool.Pool
Logger *zap.Logger
Timeout time.Duration
Key *ecdsa.PrivateKey
}
// GetObjectParams stores object get request parameters.
GetObjectParams struct {
Range *RangeParams
Bucket string
Object string
Offset int64
Length int64
Writer io.Writer
}
// RangeParams stores range header request parameters.
RangeParams struct {
Start uint64
End uint64
}
// PutObjectParams stores object put request parameters.
PutObjectParams struct {
Bucket string
Object string
Size int64
Reader io.Reader
Header map[string]string
}
// CopyObjectParams stores object copy request parameters.
CopyObjectParams struct {
SrcBucket string
DstBucket string
SrcObject string
DstObject string
SrcSize int64
Header map[string]string
}
// CreateBucketParams stores bucket create request parameters.
CreateBucketParams struct {
Name string
ACL uint32
Policy *netmap.PlacementPolicy
}
// DeleteBucketParams stores delete bucket request parameters.
DeleteBucketParams struct {
Name string
}
// ListObjectVersionsParams stores list objects versions parameters.
ListObjectVersionsParams struct {
Bucket string
Delimiter string
KeyMarker string
MaxKeys int
Prefix string
VersionIDMarker string
Encode string
}
// NeoFS provides basic NeoFS interface.
NeoFS interface {
Get(ctx context.Context, address *object.Address) (*object.Object, error)
}
// Client provides S3 API client interface.
Client interface {
NeoFS
ListBuckets(ctx context.Context) ([]*BucketInfo, error)
GetBucketInfo(ctx context.Context, name string) (*BucketInfo, error)
CreateBucket(ctx context.Context, p *CreateBucketParams, boxData *accessbox.Box) (*cid.ID, error)
DeleteBucket(ctx context.Context, p *DeleteBucketParams) error
GetObject(ctx context.Context, p *GetObjectParams) error
GetObjectInfo(ctx context.Context, bucketName, objectName string) (*ObjectInfo, error)
PutObject(ctx context.Context, p *PutObjectParams) (*ObjectInfo, error)
CopyObject(ctx context.Context, p *CopyObjectParams) (*ObjectInfo, error)
ListObjects(ctx context.Context, p *ListObjectsParams) (*ListObjectsInfo, error)
ListObjectVersions(ctx context.Context, p *ListObjectVersionsParams) (*ListObjectVersionsInfo, error)
DeleteObject(ctx context.Context, bucket, object string) error
DeleteObjects(ctx context.Context, bucket string, objects []string) []error
}
)
var (
// ErrObjectExists is returned on attempts to create already existing object.
ErrObjectExists = errors.New("object exists")
// ErrObjectNotExists is returned on attempts to work with non-existing object.
ErrObjectNotExists = errors.New("object not exists")
// ErrBucketAlreadyExists is returned on attempts to create already existing bucket.
ErrBucketAlreadyExists = errors.New("bucket exists")
// ErrBucketNotFound is returned on attempts to get not existing bucket.
ErrBucketNotFound = errors.New("bucket not found")
)
const (
// ETag (hex encoded md5sum) of empty string.
emptyETag = "d41d8cd98f00b204e9800998ecf8427e"
unversionedObjectVersionID = "null"
)
// NewLayer creates instance of layer. It checks credentials
// and establishes gRPC connection with node.
func NewLayer(log *zap.Logger, conns pool.Pool) Client {
return &layer{
pool: conns,
log: log,
}
}
// Owner returns owner id from BearerToken (context) or from client owner.
func (n *layer) Owner(ctx context.Context) *owner.ID {
if data, ok := ctx.Value(api.BoxData).(*accessbox.Box); ok && data != nil && data.Gate != nil {
return data.Gate.BearerToken.Issuer()
}
return n.pool.OwnerID()
}
// BearerOpt returns client.WithBearer call option with token from context or with nil token.
func (n *layer) BearerOpt(ctx context.Context) client.CallOption {
if data, ok := ctx.Value(api.BoxData).(*accessbox.Box); ok && data != nil && data.Gate != nil {
return client.WithBearer(data.Gate.BearerToken)
}
return client.WithBearer(nil)
}
// SessionOpt returns client.WithSession call option with token from context or with nil token.
func (n *layer) SessionOpt(ctx context.Context) client.CallOption {
if data, ok := ctx.Value(api.BoxData).(*accessbox.Box); ok && data != nil && data.Gate != nil {
return client.WithSession(data.Gate.SessionToken)
}
return client.WithSession(nil)
}
2021-05-13 19:25:32 +00:00
// Get NeoFS Object by refs.Address (should be used by auth.Center).
func (n *layer) Get(ctx context.Context, address *object.Address) (*object.Object, error) {
ops := new(client.GetObjectParams).WithAddress(address)
return n.pool.GetObject(ctx, ops, n.BearerOpt(ctx))
}
// GetBucketInfo returns bucket info by name.
func (n *layer) GetBucketInfo(ctx context.Context, name string) (*BucketInfo, error) {
name, err := url.QueryUnescape(name)
if err != nil {
return nil, err
}
containerID := new(cid.ID)
if err := containerID.Parse(name); err != nil {
list, err := n.containerList(ctx)
if err != nil {
return nil, err
}
for _, bkt := range list {
if bkt.Name == name {
return bkt, nil
}
}
return nil, ErrBucketNotFound
}
return n.containerInfo(ctx, containerID)
}
// ListBuckets returns all user containers. Name of the bucket is a container
// id. Timestamp is omitted since it is not saved in neofs container.
func (n *layer) ListBuckets(ctx context.Context) ([]*BucketInfo, error) {
return n.containerList(ctx)
}
// ListObjects returns objects from the container. It ignores tombstones and
// storage groups.
// ctx, bucket, prefix, continuationToken, delimiter, maxKeys
func (n *layer) ListObjects(ctx context.Context, p *ListObjectsParams) (*ListObjectsInfo, error) {
// todo: make pagination when search response will be gRPC stream,
// pagination must be implemented with cache, because search results
// may be different between search calls
var (
err error
bkt *BucketInfo
ids []*object.ID
result ListObjectsInfo
uniqNames = make(map[string]bool)
)
if p.MaxKeys == 0 {
return &result, nil
}
if bkt, err = n.GetBucketInfo(ctx, p.Bucket); err != nil {
return nil, err
} else if ids, err = n.objectSearch(ctx, &findParams{cid: bkt.CID}); err != nil {
return nil, err
}
ln := len(ids)
// todo: check what happens if there is more than maxKeys objects
if ln > p.MaxKeys {
ln = p.MaxKeys
}
mostRecentModified := time.Time{}
needDirectoryAsKey := p.Version == 2 && len(p.Prefix) > 0 && len(p.Delimiter) > 0 && strings.HasSuffix(p.Prefix, p.Delimiter)
result.Objects = make([]*ObjectInfo, 0, ln)
for _, id := range ids {
addr := object.NewAddress()
addr.SetObjectID(id)
addr.SetContainerID(bkt.CID)
meta, err := n.objectHead(ctx, addr)
if err != nil {
n.log.Warn("could not fetch object meta", zap.Error(err))
continue
}
// // ignore tombstone objects
// _, hdr := meta.LastHeader(object.HeaderType(object.TombstoneHdr))
// if hdr != nil {
// continue
// }
// ignore storage group objects
// _, hdr = meta.LastHeader(object.HeaderType(object.StorageGroupHdr))
// if hdr != nil {
// continue
// }
// dirs don't exist in neofs, gateway stores full path to the file
// in object header, e.g. `filename`:`/this/is/path/file.txt`
// prefix argument contains full dir path from the root, e.g. `/this/is/`
// to emulate dirs we take dirs in path, compare it with prefix
// and look for entities after prefix. If entity does not have any
// sub-entities, then it is a file, else directory.
if oi := objectInfoFromMeta(bkt, meta, p.Prefix, p.Delimiter); oi != nil {
if needDirectoryAsKey && oi.Created.After(mostRecentModified) {
mostRecentModified = oi.Created
}
// use only unique dir names
if _, ok := uniqNames[oi.Name]; ok {
continue
}
if len(p.Marker) > 0 && oi.Name <= p.Marker {
continue
}
uniqNames[oi.Name] = oi.isDir
result.Objects = append(result.Objects, oi)
}
}
sort.Slice(result.Objects, func(i, j int) bool {
return result.Objects[i].Name < result.Objects[j].Name
})
if len(result.Objects) > p.MaxKeys {
result.IsTruncated = true
result.Objects = result.Objects[:p.MaxKeys]
result.NextMarker = result.Objects[len(result.Objects)-1].Name
}
fillPrefixes(&result, uniqNames)
if needDirectoryAsKey {
res := []*ObjectInfo{{
Name: p.Prefix,
Created: mostRecentModified,
HashSum: emptyETag,
}}
result.Objects = append(res, result.Objects...)
}
return &result, nil
}
func fillPrefixes(result *ListObjectsInfo, directories map[string]bool) {
index := 0
for range result.Objects {
name := result.Objects[index].Name
if isDir := directories[name]; isDir {
result.Objects = append(result.Objects[:index], result.Objects[index+1:]...)
result.Prefixes = append(result.Prefixes, name)
} else {
index++
}
}
}
// GetObject from storage.
func (n *layer) GetObject(ctx context.Context, p *GetObjectParams) error {
var (
err error
oid *object.ID
bkt *BucketInfo
)
if bkt, err = n.GetBucketInfo(ctx, p.Bucket); err != nil {
return fmt.Errorf("couldn't find bucket: %s : %w", p.Bucket, err)
} else if oid, err = n.objectFindID(ctx, &findParams{cid: bkt.CID, val: p.Object}); err != nil {
return fmt.Errorf("search of the object failed: cid: %s, val: %s : %w", bkt.CID, p.Object, err)
}
addr := object.NewAddress()
addr.SetObjectID(oid)
addr.SetContainerID(bkt.CID)
params := &getParams{
Writer: p.Writer,
address: addr,
offset: p.Offset,
length: p.Length,
}
if p.Range != nil {
objRange := object.NewRange()
objRange.SetOffset(p.Range.Start)
// Range header is inclusive
objRange.SetLength(p.Range.End - p.Range.Start + 1)
params.Range = objRange
_, err = n.objectRange(ctx, params)
} else {
_, err = n.objectGet(ctx, params)
}
if err != nil {
return fmt.Errorf("couldn't get object, cid: %s : %w", bkt.CID, err)
}
return nil
}
func (n *layer) checkObject(ctx context.Context, cid *cid.ID, filename string) error {
var err error
if _, err = n.objectFindID(ctx, &findParams{cid: cid, val: filename}); err == nil {
return ErrObjectExists
} else if state, ok := status.FromError(err); !ok || state == nil {
return err
} else if state.Code() == codes.NotFound {
return ErrObjectNotExists
}
return err
}
// GetObjectInfo returns meta information about the object.
func (n *layer) GetObjectInfo(ctx context.Context, bucketName, filename string) (*ObjectInfo, error) {
var (
err error
oid *object.ID
bkt *BucketInfo
meta *object.Object
)
if bkt, err = n.GetBucketInfo(ctx, bucketName); err != nil {
n.log.Error("could not fetch bucket info", zap.Error(err))
return nil, err
} else if oid, err = n.objectFindID(ctx, &findParams{cid: bkt.CID, val: filename}); err != nil {
n.log.Error("could not find object id", zap.Error(err))
return nil, err
}
addr := object.NewAddress()
addr.SetObjectID(oid)
addr.SetContainerID(bkt.CID)
if meta, err = n.objectHead(ctx, addr); err != nil {
n.log.Error("could not fetch object head", zap.Error(err))
return nil, err
}
return objectInfoFromMeta(bkt, meta, "", ""), nil
}
// PutObject into storage.
func (n *layer) PutObject(ctx context.Context, p *PutObjectParams) (*ObjectInfo, error) {
return n.objectPut(ctx, p)
}
// CopyObject from one bucket into another bucket.
func (n *layer) CopyObject(ctx context.Context, p *CopyObjectParams) (*ObjectInfo, error) {
pr, pw := io.Pipe()
go func() {
err := n.GetObject(ctx, &GetObjectParams{
Bucket: p.SrcBucket,
Object: p.SrcObject,
Writer: pw,
})
if err = pw.CloseWithError(err); err != nil {
n.log.Error("could not get object", zap.Error(err))
}
}()
return n.PutObject(ctx, &PutObjectParams{
Bucket: p.DstBucket,
Object: p.DstObject,
Size: p.SrcSize,
Reader: pr,
Header: p.Header,
})
}
// DeleteObject removes all objects with passed nice name.
func (n *layer) DeleteObject(ctx context.Context, bucket, filename string) error {
var (
err error
ids []*object.ID
bkt *BucketInfo
)
if bkt, err = n.GetBucketInfo(ctx, bucket); err != nil {
return &api.DeleteError{
Err: err,
Object: filename,
}
} else if ids, err = n.objectSearch(ctx, &findParams{cid: bkt.CID, val: filename}); err != nil {
return &api.DeleteError{
Err: err,
Object: filename,
}
}
for _, id := range ids {
addr := object.NewAddress()
addr.SetObjectID(id)
addr.SetContainerID(bkt.CID)
if err = n.objectDelete(ctx, addr); err != nil {
return &api.DeleteError{
Err: err,
Object: filename,
}
}
}
return nil
}
// DeleteObjects from the storage.
func (n *layer) DeleteObjects(ctx context.Context, bucket string, objects []string) []error {
var errs = make([]error, 0, len(objects))
for i := range objects {
if err := n.DeleteObject(ctx, bucket, objects[i]); err != nil {
errs = append(errs, err)
}
}
return errs
}
func (n *layer) CreateBucket(ctx context.Context, p *CreateBucketParams, boxData *accessbox.Box) (*cid.ID, error) {
_, err := n.GetBucketInfo(ctx, p.Name)
if err != nil {
if errors.Is(err, ErrBucketNotFound) {
return n.createContainer(ctx, p, boxData)
}
return nil, err
}
return nil, ErrBucketAlreadyExists
}
func (n *layer) DeleteBucket(ctx context.Context, p *DeleteBucketParams) error {
bucketInfo, err := n.GetBucketInfo(ctx, p.Name)
if err != nil {
return err
}
return n.deleteContainer(ctx, bucketInfo.CID)
}
func (n *layer) ListObjectVersions(ctx context.Context, p *ListObjectVersionsParams) (*ListObjectVersionsInfo, error) {
var (
res = ListObjectVersionsInfo{}
err error
bkt *BucketInfo
ids []*object.ID
uniqNames = make(map[string]bool)
)
if bkt, err = n.GetBucketInfo(ctx, p.Bucket); err != nil {
return nil, err
} else if ids, err = n.objectSearch(ctx, &findParams{cid: bkt.CID}); err != nil {
return nil, err
}
versions := make([]*ObjectVersionInfo, 0, len(ids))
// todo: deletemarkers is empty now, we will use it after proper realization of versioning
deleted := make([]*DeletedObjectInfo, 0, len(ids))
res.DeleteMarker = deleted
for _, id := range ids {
addr := object.NewAddress()
addr.SetObjectID(id)
addr.SetContainerID(bkt.CID)
meta, err := n.objectHead(ctx, addr)
if err != nil {
n.log.Warn("could not fetch object meta", zap.Error(err))
continue
}
if ov := objectVersionInfoFromMeta(bkt, meta, p.Prefix, p.Delimiter); ov != nil {
if _, ok := uniqNames[ov.Object.Name]; ok {
continue
}
if len(p.KeyMarker) > 0 && ov.Object.Name <= p.KeyMarker {
continue
}
uniqNames[ov.Object.Name] = ov.Object.isDir
versions = append(versions, ov)
}
}
sort.Slice(versions, func(i, j int) bool {
return versions[i].Object.Name < versions[j].Object.Name
})
if len(versions) > p.MaxKeys {
res.IsTruncated = true
lastVersion := versions[p.MaxKeys-1]
res.KeyMarker = lastVersion.Object.Name
res.VersionIDMarker = lastVersion.VersionID
nextVersion := versions[p.MaxKeys]
res.NextKeyMarker = nextVersion.Object.Name
res.NextVersionIDMarker = nextVersion.VersionID
versions = versions[:p.MaxKeys]
}
for _, ov := range versions {
if isDir := uniqNames[ov.Object.Name]; isDir {
res.CommonPrefixes = append(res.CommonPrefixes, &ov.Object.Name)
} else {
res.Version = append(res.Version, ov)
}
}
return &res, nil
}