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76 lines
1.9 KiB
76 lines
1.9 KiB
package donut
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import (
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"errors"
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"io"
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"os"
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"path"
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"sort"
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"strings"
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"encoding/json"
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"path/filepath"
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)
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type localDirectoryNode struct {
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root string
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}
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func (d localDirectoryNode) GetBuckets() ([]string, error) {
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return nil, errors.New("Not Implemented")
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}
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func (d localDirectoryNode) GetWriter(bucket, object string) (Writer, error) {
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objectPath := path.Join(d.root, bucket, object)
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err := os.MkdirAll(objectPath, 0700)
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if err != nil {
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return nil, err
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}
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return newDonutFileWriter(objectPath)
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}
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func (d localDirectoryNode) GetReader(bucket, object string) (io.ReadCloser, error) {
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return os.Open(path.Join(d.root, bucket, object, "data"))
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}
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func (d localDirectoryNode) GetMetadata(bucket, object string) (map[string]string, error) {
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return d.getMetadata(bucket, object, "metadata.json")
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}
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func (d localDirectoryNode) GetDonutMetadata(bucket, object string) (map[string]string, error) {
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return d.getMetadata(bucket, object, "donutMetadata.json")
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}
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func (d localDirectoryNode) getMetadata(bucket, object, fileName string) (map[string]string, error) {
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file, err := os.Open(path.Join(d.root, bucket, object, fileName))
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defer file.Close()
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if err != nil {
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return nil, err
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}
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metadata := make(map[string]string)
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decoder := json.NewDecoder(file)
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if err := decoder.Decode(&metadata); err != nil {
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return nil, err
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}
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return metadata, nil
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}
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func (d localDirectoryNode) ListObjects(bucketName string) ([]string, error) {
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prefix := path.Join(d.root, bucketName)
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var objects []string
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if err := filepath.Walk(prefix, func(path string, info os.FileInfo, err error) error {
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if err != nil {
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return err
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}
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if !info.IsDir() && strings.HasSuffix(path, "data") {
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object := strings.TrimPrefix(path, prefix+"/")
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object = strings.TrimSuffix(object, "/data")
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objects = append(objects, object)
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}
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return nil
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}); err != nil {
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return nil, err
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}
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sort.Strings(objects)
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return objects, nil
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}
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