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