64 lines
1.7 KiB
Go
64 lines
1.7 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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"errors"
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"io"
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)
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// TODO(sgotti)
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// define common errors (like notFound) so the implementations will return them
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// instead of their own errors
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var ErrNotExist = errors.New("does not exist")
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type Storage interface {
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Stat(filepath string) (*ObjectInfo, error)
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ReadObject(filepath string) (io.ReadCloser, error)
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WriteObject(filepath string, data io.Reader) 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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type ObjectInfo struct {
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Path string
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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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