refactor list into ReadDir and use os.FileInfo

utils.go

@@ -9,6 +9,13 @@ import (
 	"time"
 )
 
+func FixSlash(s string) string {
+	if !strings.HasSuffix(s, "/") {
+		s += "/"
+	}
+	return s
+}
+
 func Join(path0 string, path1 string) string {
 	return strings.TrimSuffix(path0, "/") + "/" + strings.TrimPrefix(path1, "/")
 }
@@ -26,6 +33,13 @@ func parseUint(s *string) uint {
 	return 0
 }
 
+func parseInt64(s *string) int64 {
+	if n, e := strconv.ParseInt(*s, 10, 64); e == nil {
+		return n
+	}
+	return 0
+}
+
 func parseModified(s *string) time.Time {
 	if t, e := time.Parse(time.RFC1123, *s); e == nil {
 		return t