func Stat(fs http.FileSystem, name string) (os.FileInfo, error) {
	f, err := fs.Open(name)
	if err != nil {
		return nil, err
	}
	defer f.Close()
	return f.Stat()
}
Stat returns the FileInfo structure describing file.
package vfsutil
import (
	"io/ioutil"
	"net/http"
	"os"
)
func ReadDir(fs http.FileSystem, name string) ([]os.FileInfo, error) {
	f, err := fs.Open(name)
	if err != nil {
		return nil, err
	}
	defer f.Close()
	return f.Readdir(0)
}