package layer import ( "context" "crypto/ecdsa" "errors" "io" "strings" "time" "github.com/nspcc-dev/neofs-api-go/pkg" "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-gate/api" "github.com/nspcc-dev/neofs-s3-gate/api/pool" "go.uber.org/zap" "google.golang.org/grpc/codes" "google.golang.org/grpc/status" ) type ( layer struct { uid *owner.ID log *zap.Logger cli pool.Client key *ecdsa.PrivateKey reqTimeout time.Duration } Params struct { Pool pool.Client Logger *zap.Logger Timeout time.Duration NFKey *ecdsa.PrivateKey } GetObjectParams struct { Bucket string Object string Offset int64 Length int64 Writer io.Writer } PutObjectParams struct { Bucket string Object string Size int64 Reader io.Reader Header map[string]string } CopyObjectParams struct { SrcBucket string DstBucket string SrcObject string DstObject string Header map[string]string } NeoFS interface { Get(ctx context.Context, address *object.Address) (*object.Object, error) } 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 } ) // AWS3NameHeader key in the object NeoFS. const AWS3NameHeader = "filename" // NewGatewayLayer creates instance of layer. It checks credentials // and establishes gRPC connection with node. func NewLayer(p *Params) (Client, error) { wallet, err := owner.NEO3WalletFromPublicKey(&p.NFKey.PublicKey) if err != nil { return nil, err } uid := owner.NewID() uid.SetNeo3Wallet(wallet) return &layer{ uid: uid, cli: p.Pool, key: p.NFKey, log: p.Logger, reqTimeout: p.Timeout, }, nil } // 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) { cli, tkn, err := n.prepareClient(ctx) if err != nil { return nil, err } gop := new(client.GetObjectParams) gop.WithAddress(address) return cli.GetObject(ctx, gop, client.WithSession(tkn)) } // GetBucketInfo returns bucket name. func (n *layer) GetBucketInfo(ctx context.Context, name string) (*BucketInfo, error) { 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. _, dirname := nameFromObject(meta) if strings.HasPrefix(dirname, p.Prefix) { var ( oi *ObjectInfo tail = strings.TrimLeft(dirname, p.Prefix) ind = strings.Index(tail, pathSeparator) ) if ind < 0 { // if there are not sub-entities in tail - file oi = objectInfoFromMeta(meta) } else { // if there are sub-entities in tail - dir oi = &ObjectInfo{ Owner: meta.GetOwnerID(), Bucket: bkt.Name, Name: tail[:ind+1], // dir MUST have slash symbol in the end // IsDir: true, } } // 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 cid = container.NewID() ) if err = cid.Parse(p.Bucket); err != nil { return err } else if oid, err = n.objectFindID(ctx, &findParams{cid: cid, key: p.Object}); err != nil { return err } addr := object.NewAddress() addr.SetObjectID(oid) addr.SetContainerID(cid) _, err = n.objectGet(ctx, &getParams{ Writer: p.Writer, addr: addr, offset: p.Offset, length: p.Length, }) 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 cid = container.NewID() meta *object.Object ) if err = cid.Parse(bucketName); err != nil { return nil, err } else if oid, err = n.objectFindID(ctx, &findParams{cid: cid, key: filename}); err != nil { return nil, err } addr := object.NewAddress() addr.SetObjectID(oid) addr.SetContainerID(cid) if meta, err = n.objectHead(ctx, addr); err != nil { return nil, err } return objectInfoFromMeta(meta), nil } func GetOwnerID(tkn *token.BearerToken) (*owner.ID, error) { switch pkg.SDKVersion().GetMajor() { case 2: id := tkn.ToV2().GetBody().GetOwnerID() return owner.NewIDFromV2(id), nil default: return nil, errors.New("unknown version") } } // 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, err } pr, pw := io.Pipe() go func() { err := n.GetObject(ctx, &GetObjectParams{ Bucket: p.SrcBucket, Object: p.SrcObject, Writer: pw, }) _ = pw.CloseWithError(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 cid = container.NewID() ) if err = cid.Parse(bucket); err != nil { return &api.DeleteError{ Err: err, Object: filename, } } else if ids, err = n.objectSearch(ctx, &findParams{cid: cid, key: filename}); err != nil { return &api.DeleteError{ Err: err, Object: filename, } } for _, id := range ids { addr := object.NewAddress() addr.SetObjectID(id) addr.SetContainerID(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 }