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package s3
import (
"context"
"io"
"os"
"path"
"github.com/minio/minio-go/v7"
)
type File struct {
fs *Fs
key string
r io.ReadSeekCloser
w io.WriteCloser
werrc <-chan error
cancel context.CancelFunc
}
// implements io.Closer
func (f *File) Close() error {
defer f.cancel()
if f.r != nil {
return f.r.Close()
}
if f.w != nil {
f.w.Close()
return <-f.werrc
}
return nil
}
// implements io.Reader
func (f *File) Read(b []byte) (int, error) {
if f.r == nil {
return 0, ErrUnsupported
}
n, err := f.r.Read(b)
if err != nil {
return n, transformError(err)
}
return n, nil
}
// implements io.ReaderAt
func (f *File) ReadAt(p []byte, off int64) (int, error) {
panic("not implemented")
}
// implements io.Writer
func (f *File) Write(p []byte) (int, error) {
if f.w == nil {
return 0, ErrUnsupported
}
n, err := f.w.Write(p)
if err != nil {
return n, transformError(err)
}
return n, nil
}
// implements io.WriterAt
func (f *File) WriteAt(p []byte, off int64) (int, error) {
panic("not implemented")
}
func (f *File) Name() string {
return path.Base(f.key)
}
func (f *File) readdir(count int, onlyDir bool) ([]os.FileInfo, error) {
if !isDirPath(f.key) {
return nil, ErrNotDirectory
}
if count == 0 {
return []os.FileInfo{}, nil
}
ctx, cancel := f.fs.contextWithTimeout()
defer cancel()
objectsCh := f.fs.client.ListObjects(ctx, f.fs.bucket, minio.ListObjectsOptions{Prefix: f.key})
n := 0
lastDir := f.key
results := make([]os.FileInfo, 0)
for objectInfo := range objectsCh {
base := path.Base(objectInfo.Key)
dir := path.Dir(objectInfo.Key) + "/"
if lastDir != dir {
lastDir = dir
results = append(results, &FileInfo{
name: base,
isDir: true,
})
if onlyDir {
n += 1
}
}
if !onlyDir {
results = append(results, transformObjectInfo(objectInfo))
n += 1
}
if n > count {
break
}
}
return results, nil
}
func (f *File) Readdir(count int) ([]os.FileInfo, error) {
return f.readdir(count, false)
}
func (f *File) Readdirnames(n int) ([]string, error) {
results, err := f.readdir(n, true)
if err != nil {
return nil, err
}
list := make([]string, 0, len(results))
for _, info := range results {
list = append(list, info.Name())
}
return list, nil
}
func (f *File) Seek(offset int64, whence int) (int64, error) {
if f.r == nil {
return 0, ErrUnsupported
}
return f.r.Seek(offset, whence)
}
func (f *File) Stat() (os.FileInfo, error) {
return f.fs.Stat(f.key)
}
func (f *File) Sync() error {
panic("not implemented")
}
func (f *File) Truncate(size int64) error {
panic("not implemented")
}
func (f *File) WriteString(s string) (ret int, err error) {
return f.Write([]byte(s))
}
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