287 lines
8.5 KiB
Go
287 lines
8.5 KiB
Go
// Copyright (C) 2018 Storj Labs, Inc.
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// See LICENSE for copying information.
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package kvmetainfo
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import (
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"context"
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"errors"
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"time"
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"github.com/golang/protobuf/proto"
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"github.com/golang/protobuf/ptypes"
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"github.com/golang/protobuf/ptypes/timestamp"
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"go.uber.org/zap"
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"storj.io/storj/pkg/encryption"
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"storj.io/storj/pkg/pb"
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"storj.io/storj/pkg/storage/meta"
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"storj.io/storj/pkg/storage/objects"
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"storj.io/storj/pkg/storage/segments"
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"storj.io/storj/pkg/storage/streams"
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"storj.io/storj/pkg/storj"
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)
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const (
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// commitedPrefix is prefix where completed object info is stored
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committedPrefix = "l/"
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)
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// GetObject returns information about an object
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func (db *DB) GetObject(ctx context.Context, bucket string, path storj.Path) (storj.Object, error) {
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_, info, err := db.getInfo(ctx, committedPrefix, bucket, path)
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return info, err
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}
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// GetObjectStream returns interface for reading the object stream
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func (db *DB) GetObjectStream(ctx context.Context, bucket string, path storj.Path) (storj.ReadOnlyStream, error) {
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meta, info, err := db.getInfo(ctx, committedPrefix, bucket, path)
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if err != nil {
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return nil, err
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}
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streamKey, err := encryption.DeriveContentKey(meta.fullpath, db.rootKey)
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if err != nil {
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return nil, err
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}
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return &readonlyStream{
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db: db,
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info: info,
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encryptedPath: meta.encryptedPath,
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streamKey: streamKey,
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}, nil
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}
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// CreateObject creates an uploading object and returns an interface for uploading Object information
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func (db *DB) CreateObject(ctx context.Context, bucket string, path storj.Path, createInfo *storj.CreateObject) (storj.MutableObject, error) {
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return nil, errors.New("not implemented")
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}
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// ModifyObject modifies a committed object
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func (db *DB) ModifyObject(ctx context.Context, bucket string, path storj.Path) (storj.MutableObject, error) {
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return nil, errors.New("not implemented")
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}
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// DeleteObject deletes an object from database
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func (db *DB) DeleteObject(ctx context.Context, bucket string, path storj.Path) error {
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objects, err := db.buckets.GetObjectStore(ctx, bucket)
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if err != nil {
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return err
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}
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return objects.Delete(ctx, path)
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}
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// ModifyPendingObject creates an interface for updating a partially uploaded object
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func (db *DB) ModifyPendingObject(ctx context.Context, bucket string, path storj.Path) (storj.MutableObject, error) {
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return nil, errors.New("not implemented")
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}
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// ListPendingObjects lists pending objects in bucket based on the ListOptions
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func (db *DB) ListPendingObjects(ctx context.Context, bucket string, options storj.ListOptions) (storj.ObjectList, error) {
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return storj.ObjectList{}, errors.New("not implemented")
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}
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// ListObjects lists objects in bucket based on the ListOptions
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func (db *DB) ListObjects(ctx context.Context, bucket string, options storj.ListOptions) (storj.ObjectList, error) {
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objects, err := db.buckets.GetObjectStore(ctx, bucket)
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if err != nil {
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return storj.ObjectList{}, err
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}
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var startAfter, endBefore string
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switch options.Direction {
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case storj.Before:
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// before lists backwards from cursor, without cursor
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endBefore = options.Cursor
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case storj.Backward:
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// backward lists backwards from cursor, including cursor
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endBefore = keyAfter(options.Cursor)
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case storj.Forward:
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// forward lists forwards from cursor, including cursor
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startAfter = keyBefore(options.Cursor)
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case storj.After:
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// after lists forwards from cursor, without cursor
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startAfter = options.Cursor
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default:
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return storj.ObjectList{}, errClass.New("invalid direction %d", options.Direction)
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}
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// TODO: remove this hack-fix of specifying the last key
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if options.Cursor == "" && (options.Direction == storj.Before || options.Direction == storj.Backward) {
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endBefore = "\x7f\x7f\x7f\x7f\x7f\x7f\x7f"
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}
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items, more, err := objects.List(ctx, options.Prefix, startAfter, endBefore, options.Recursive, options.Limit, meta.All)
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if err != nil {
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return storj.ObjectList{}, err
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}
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list := storj.ObjectList{
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Bucket: bucket,
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Prefix: options.Prefix,
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More: more,
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Items: make([]storj.Object, 0, len(items)),
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}
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for _, item := range items {
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list.Items = append(list.Items, objectFromMeta("", item.Path, item.IsPrefix, item.Meta))
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}
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return list, nil
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}
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type object struct {
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fullpath string
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encryptedPath string
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lastSegmentMeta segments.Meta
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streamInfo pb.StreamInfo
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streamMeta pb.StreamMeta
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}
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func (db *DB) getInfo(ctx context.Context, prefix string, bucket string, path storj.Path) (object, storj.Object, error) {
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bucketInfo, err := db.GetBucket(ctx, bucket)
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if err != nil {
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return object{}, storj.Object{}, err
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}
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fullpath := bucket + "/" + path
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encryptedPath, err := streams.EncryptAfterBucket(fullpath, bucketInfo.PathCipher, db.rootKey)
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if err != nil {
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return object{}, storj.Object{}, err
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}
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pointer, _, err := db.pointers.Get(ctx, prefix+encryptedPath)
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if err != nil {
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return object{}, storj.Object{}, err
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}
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var redundancyScheme *pb.RedundancyScheme
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if pointer.GetType() == pb.Pointer_REMOTE {
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redundancyScheme = pointer.GetRemote().GetRedundancy()
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} else {
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// TODO: handle better
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redundancyScheme = &pb.RedundancyScheme{
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Type: pb.RedundancyScheme_RS,
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MinReq: -1,
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Total: -1,
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RepairThreshold: -1,
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SuccessThreshold: -1,
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ErasureShareSize: -1,
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}
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}
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lastSegmentMeta := segments.Meta{
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Modified: convertTime(pointer.GetCreationDate()),
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Expiration: convertTime(pointer.GetExpirationDate()),
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Size: pointer.GetSize(),
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Data: pointer.GetMetadata(),
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}
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streamInfoData, err := streams.DecryptStreamInfo(ctx, lastSegmentMeta, fullpath, db.rootKey)
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if err != nil {
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return object{}, storj.Object{}, err
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}
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streamInfo := pb.StreamInfo{}
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err = proto.Unmarshal(streamInfoData, &streamInfo)
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if err != nil {
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return object{}, storj.Object{}, err
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}
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streamMeta := pb.StreamMeta{}
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err = proto.Unmarshal(lastSegmentMeta.Data, &streamMeta)
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if err != nil {
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return object{}, storj.Object{}, err
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}
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info := objectStreamFromMeta(bucket, path, lastSegmentMeta, streamInfo, streamMeta, redundancyScheme)
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return object{
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fullpath: fullpath,
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encryptedPath: encryptedPath,
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lastSegmentMeta: lastSegmentMeta,
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streamInfo: streamInfo,
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streamMeta: streamMeta,
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}, info, nil
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}
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func objectFromMeta(bucket string, path storj.Path, isPrefix bool, meta objects.Meta) storj.Object {
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return storj.Object{
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Version: 0, // TODO:
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Bucket: bucket,
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Path: path,
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IsPrefix: isPrefix,
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Metadata: nil,
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ContentType: meta.ContentType,
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Created: meta.Modified, // TODO: use correct field
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Modified: meta.Modified, // TODO: use correct field
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Expires: meta.Expiration,
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Stream: storj.Stream{
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Size: meta.Size,
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Checksum: []byte(meta.Checksum),
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},
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}
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}
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func objectStreamFromMeta(bucket string, path storj.Path, lastSegment segments.Meta, stream pb.StreamInfo, streamMeta pb.StreamMeta, redundancyScheme *pb.RedundancyScheme) storj.Object {
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var nonce storj.Nonce
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copy(nonce[:], streamMeta.LastSegmentMeta.KeyNonce)
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return storj.Object{
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Version: 0, // TODO:
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Bucket: bucket,
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Path: path,
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IsPrefix: false,
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Metadata: nil, // TODO:
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// ContentType: object.ContentType,
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Created: lastSegment.Modified, // TODO: use correct field
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Modified: lastSegment.Modified, // TODO: use correct field
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Expires: lastSegment.Expiration, // TODO: use correct field
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Stream: storj.Stream{
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Size: stream.SegmentsSize*(stream.NumberOfSegments-1) + stream.LastSegmentSize,
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// Checksum: []byte(object.Checksum),
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SegmentCount: stream.NumberOfSegments,
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FixedSegmentSize: stream.SegmentsSize,
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RedundancyScheme: storj.RedundancyScheme{
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Algorithm: storj.ReedSolomon,
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ShareSize: int64(redundancyScheme.GetErasureShareSize()),
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RequiredShares: int16(redundancyScheme.GetMinReq()),
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RepairShares: int16(redundancyScheme.GetRepairThreshold()),
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OptimalShares: int16(redundancyScheme.GetSuccessThreshold()),
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TotalShares: int16(redundancyScheme.GetTotal()),
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},
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EncryptionScheme: storj.EncryptionScheme{
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Cipher: storj.Cipher(streamMeta.EncryptionType),
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BlockSize: streamMeta.EncryptionBlockSize,
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},
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LastSegment: storj.LastSegment{
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Size: stream.LastSegmentSize,
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EncryptedKeyNonce: nonce,
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EncryptedKey: streamMeta.LastSegmentMeta.EncryptedKey,
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},
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},
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}
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}
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// convertTime converts gRPC timestamp to Go time
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func convertTime(ts *timestamp.Timestamp) time.Time {
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if ts == nil {
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return time.Time{}
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}
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t, err := ptypes.Timestamp(ts)
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if err != nil {
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zap.S().Warnf("Failed converting timestamp %v: %v", ts, err)
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}
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return t
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}
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