forked from Deuxfleurs/bagage
128 lines
2.2 KiB
Go
128 lines
2.2 KiB
Go
package s3
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import (
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"errors"
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"io/fs"
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"path"
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"time"
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"github.com/minio/minio-go/v7"
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)
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type S3Stat struct {
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fs *S3FS
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obj minio.ObjectInfo
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path S3Path
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}
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/*
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* Stat a path knowing its ObjectInfo
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*/
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func NewS3StatFromObjectInfo(fs *S3FS, bucket string, obj minio.ObjectInfo) (*S3Stat, error) {
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s := new(S3Stat)
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s.path = NewTrustedS3Path(bucket, obj)
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s.obj = obj
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s.fs = fs
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fs.cache[s.path.Path] = s
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return s, nil
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}
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/*
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* Stat a path without additional information
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*/
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func NewS3Stat(fs *S3FS, path string) (*S3Stat, error) {
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cache := fs.cache
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if entry, ok := cache[path]; ok {
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return entry, nil
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}
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s := new(S3Stat)
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s.fs = fs
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s.path = NewS3Path(path)
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if err := s.Refresh(); err != nil {
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return nil, err
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}
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if s.path.Class&OPAQUE_KEY != 0 {
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return nil, errors.New("Failed to precisely determine the key type, this a logic error.")
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}
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cache[path] = s
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cache[s.path.Path] = s
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return s, nil
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}
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func (s *S3Stat) Refresh() error {
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if s.path.Class == ROOT || s.path.Class == BUCKET {
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return nil
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}
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mc := s.fs.mc
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// Compute the prefix to have the desired behaviour for our stat logic
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prefix := s.path.Key
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if prefix[len(prefix)-1:] == "/" {
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prefix = prefix[:len(prefix)-1]
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}
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// Get info and check if the key exists
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objs_info := mc.ListObjects(s.fs.ctx, s.path.Bucket, minio.ListObjectsOptions{
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Prefix: prefix,
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Recursive: false,
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})
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found := false
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for object := range objs_info {
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if object.Err != nil {
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return object.Err
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}
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if object.Key == prefix || object.Key == prefix+"/" {
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s.obj = object
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s.path = NewTrustedS3Path(s.path.Bucket, object)
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found = true
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break
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}
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}
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if !found {
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return fs.ErrNotExist
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}
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return nil
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}
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func (s *S3Stat) Name() string {
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if s.path.Class == ROOT {
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return "/"
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} else if s.path.Class == BUCKET {
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return s.path.Bucket
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} else {
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return path.Base(s.path.Key)
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}
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}
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func (s *S3Stat) Size() int64 {
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return s.obj.Size
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}
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func (s *S3Stat) Mode() fs.FileMode {
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if s.path.Class == OBJECT {
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return fs.ModePerm
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} else {
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return fs.ModeDir | fs.ModePerm
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}
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}
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func (s *S3Stat) ModTime() time.Time {
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return s.obj.LastModified
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}
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func (s *S3Stat) IsDir() bool {
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return s.path.Class != OBJECT
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}
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func (s *S3Stat) Sys() interface{} {
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return nil
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}
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