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() } // 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 }