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object_storage.go
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object_storage.go
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// Copyright (C) 2018-present Juicedata Inc.
package object
import (
"errors"
"fmt"
"io"
"os"
"time"
"github.com/juicedata/juicesync/utils"
"github.com/juicedata/juicesync/versioninfo"
)
var logger = utils.GetLogger("juicesync")
var UserAgent = fmt.Sprintf("juicesync/%s", versioninfo.Version())
type Object struct {
Key string
Size int64
Mtime time.Time // Unix seconds
IsDir bool
}
type MultipartUpload struct {
MinPartSize int
MaxCount int
UploadID string
}
type Part struct {
Num int
Size int
ETag string
}
type PendingPart struct {
Key string
UploadID string
Created time.Time
}
type ObjectStorage interface {
String() string
Create() error
Head(key string) (*Object, error)
Get(key string, off, limit int64) (io.ReadCloser, error)
Put(key string, in io.Reader) error
Delete(key string) error
List(prefix, marker string, limit int64) ([]*Object, error)
ListAll(prefix, marker string) (<-chan *Object, error)
CreateMultipartUpload(key string) (*MultipartUpload, error)
UploadPart(key string, uploadID string, num int, body []byte) (*Part, error)
AbortUpload(key string, uploadID string)
CompleteUpload(key string, uploadID string, parts []*Part) error
ListUploads(marker string) ([]*PendingPart, string, error)
}
type MtimeChanger interface {
Chtimes(path string, mtime time.Time) error
}
type File struct {
Object
Owner string
Group string
Mode os.FileMode
}
type FileSystem interface {
MtimeChanger
Chmod(path string, mode os.FileMode) error
Chown(path string, owner, group string) error
}
var notSupported = errors.New("not supported")
type DefaultObjectStorage struct{}
func (s DefaultObjectStorage) Create() error {
return nil
}
func (s DefaultObjectStorage) CreateMultipartUpload(key string) (*MultipartUpload, error) {
return nil, notSupported
}
func (s DefaultObjectStorage) UploadPart(key string, uploadID string, num int, body []byte) (*Part, error) {
return nil, notSupported
}
func (s DefaultObjectStorage) AbortUpload(key string, uploadID string) {}
func (s DefaultObjectStorage) CompleteUpload(key string, uploadID string, parts []*Part) error {
return notSupported
}
func (s DefaultObjectStorage) ListUploads(marker string) ([]*PendingPart, string, error) {
return nil, "", nil
}
func (s DefaultObjectStorage) List(prefix, marker string, limit int64) ([]*Object, error) {
return nil, notSupported
}
func (s DefaultObjectStorage) ListAll(prefix, marker string) (<-chan *Object, error) {
return nil, notSupported
}
type Creator func(bucket, accessKey, secretKey string) (ObjectStorage, error)
var storages = make(map[string]Creator)
func Register(name string, register Creator) {
storages[name] = register
}
func CreateStorage(name, endpoint, accessKey, secretKey string) (ObjectStorage, error) {
f, ok := storages[name]
if ok {
logger.Debugf("Creating %s storage at endpoint %s", name, endpoint)
return f(endpoint, accessKey, secretKey)
}
return nil, fmt.Errorf("invalid storage: %s", name)
}