94 lines
2.3 KiB
Go
94 lines
2.3 KiB
Go
// Copyright 2019 Sorint.lab
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
package objectstorage
|
|
|
|
import (
|
|
"io"
|
|
"time"
|
|
|
|
errors "golang.org/x/xerrors"
|
|
)
|
|
|
|
type Storage interface {
|
|
Stat(filepath string) (*ObjectInfo, error)
|
|
ReadObject(filepath string) (ReadSeekCloser, error)
|
|
// WriteObject atomically writes an object. If size is greater or equal to
|
|
// zero then only size bytes will be read from data and wrote. If size is
|
|
// less than zero data will be wrote until EOF. When persist is true the
|
|
// implementation must ensure that data is persisted to the underlying
|
|
// storage.
|
|
WriteObject(filepath string, data io.Reader, size int64, persist bool) error
|
|
DeleteObject(filepath string) error
|
|
List(prefix, startWith, delimiter string, doneCh <-chan struct{}) <-chan ObjectInfo
|
|
}
|
|
|
|
type ErrNotExist struct {
|
|
err error
|
|
}
|
|
|
|
func NewErrNotExist(err error) error {
|
|
return &ErrNotExist{err: err}
|
|
}
|
|
|
|
func (e *ErrNotExist) Error() string {
|
|
return e.err.Error()
|
|
}
|
|
|
|
func (*ErrNotExist) Is(err error) bool {
|
|
_, ok := err.(*ErrNotExist)
|
|
return ok
|
|
}
|
|
|
|
func IsNotExist(err error) bool {
|
|
return errors.Is(err, &ErrNotExist{})
|
|
}
|
|
|
|
type ReadSeekCloser interface {
|
|
io.Reader
|
|
io.Seeker
|
|
io.Closer
|
|
}
|
|
|
|
type ObjectInfo struct {
|
|
Path string
|
|
LastModified time.Time
|
|
Size int64
|
|
|
|
Err error
|
|
}
|
|
|
|
// ObjStorage wraps a Storage providing additional helper functions
|
|
type ObjStorage struct {
|
|
Storage
|
|
delimiter string
|
|
}
|
|
|
|
func NewObjStorage(s Storage, delimiter string) *ObjStorage {
|
|
return &ObjStorage{Storage: s, delimiter: delimiter}
|
|
}
|
|
|
|
func (s *ObjStorage) Delimiter() string {
|
|
return s.delimiter
|
|
}
|
|
|
|
func (s *ObjStorage) List(prefix, startWith string, recursive bool, doneCh <-chan struct{}) <-chan ObjectInfo {
|
|
delimiter := s.delimiter
|
|
if recursive {
|
|
delimiter = ""
|
|
}
|
|
|
|
return s.Storage.List(prefix, startWith, delimiter, doneCh)
|
|
}
|