vessel/http_dir.go

package vessel

import (
	"io"
	"net/http"
	"os"
	"time"
)

// File implements an http.File
type Dir struct {
	name string
	mode os.FileMode
	fs   *FileSystem
}

// verify we implement the http.File interface
var _ http.File = (*Dir)(nil)
var _ os.FileInfo = (*Dir)(nil)

// Readdir implements http.File
func (f *Dir) Readdir(count int) ([]os.FileInfo, error) {
	files, err := f.fs.Dir(f.name)
	if err != nil {
		return nil, err
	}

	if len(files) < count {
		count = len(files)
	}
	return files[:count], nil
}

// Stat implements http.File
func (f *Dir) Stat() (os.FileInfo, error) {
	return f, nil
}

// Seek implements io.Seeker
func (f *Dir) Seek(offset int64, whence int) (int64, error) {
	return 0, os.ErrInvalid
}

// Read implements io.Reader
func (f *Dir) Read(p []byte) (n int, err error) {
	return 0, io.EOF
}

// Close implements io.Closer
func (f *Dir) Close() error {
	return nil
}

// implement file info interface as well
func (f *Dir) Name() string {
	return f.name
}

func (f *Dir) Size() int64 {
	return 0
}
func (f *Dir) Mode() os.FileMode {
	return f.mode
}
func (f *Dir) ModTime() time.Time {
	return time.Now()
}
func (f *Dir) IsDir() bool {
	return true
}
func (f *Dir) Sys() interface{} {
	return nil
}