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

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package layer
import (
"context"
"crypto/ecdsa"
"errors"
"fmt"
"io"
"net/url"
"time"
"github.com/nspcc-dev/neofs-api-go/pkg/client"
"github.com/nspcc-dev/neofs-api-go/pkg/container"
"github.com/nspcc-dev/neofs-api-go/pkg/object"
"github.com/nspcc-dev/neofs-api-go/pkg/owner"
"github.com/nspcc-dev/neofs-api-go/pkg/token"
"github.com/nspcc-dev/neofs-s3-gw/api"
"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 {
Bucket string
Object string
Offset int64
Length int64
Writer io.Writer
}
// 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
Header map[string]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)
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)
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")
)
// 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 tkn, ok := ctx.Value(api.BearerTokenKey).(*token.BearerToken); ok && tkn != nil {
return tkn.Issuer()
}
return n.pool.OwnerID()
}
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) {
conn, tok, err := n.pool.Connection()
if err != nil {
return nil, err
}
ops := new(client.GetObjectParams).WithAddress(address)
return conn.GetObject(ctx, ops, client.WithSession(tok))
}
// 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
}
list, err := n.containerList(ctx)
if err != nil {
return nil, err
}
for _, bkt := range list {
if bkt.Name == name {
return bkt, nil
}
}
return nil, status.Error(codes.NotFound, "bucket not found")
}
// 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]struct{})
)
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
result.IsTruncated = true
}
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); oi != nil {
// use only unique dir names
if _, ok := uniqNames[oi.Name]; !ok {
uniqNames[oi.Name] = struct{}{}
result.Objects = append(result.Objects, oi)
}
}
}
return &result, nil
}
// 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)
_, err = n.objectGet(ctx, &getParams{
Writer: p.Writer,
address: addr,
offset: p.Offset,
length: p.Length,
})
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 *container.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, rootSeparator), 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) {
info, err := n.GetObjectInfo(ctx, p.SrcBucket, p.SrcObject)
if err != nil {
return nil, fmt.Errorf("couldn't get object info: %w", err)
}
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))
}
}()
// set custom headers
for k, v := range p.Header {
info.Headers[k] = v
}
return n.PutObject(ctx, &PutObjectParams{
Bucket: p.DstBucket,
Object: p.DstObject,
Size: info.Size,
Reader: pr,
Header: info.Headers,
})
}
// 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
}