gcsweb/cmd/gcsweb/gcsweb.go
func dirname(path string) string {
	leading := ""
	if strings.HasPrefix(path, "/") {
		leading = "/"
	}
	parts := strings.Split(strings.Trim(path, "/"), "/")
	if len(parts) > 1 {
		return leading + strings.Join(parts[0:len(parts)-1], "/") + "/"
	}
	return leading
}
func dirname(path string) string {
	leading := ""
	if strings.HasPrefix(path, "/") {
		leading = "/"
	}
	parts := strings.Split(strings.Trim(path, "/"), "/")
	if len(parts) > 1 {
		return leading + strings.Join(parts[0:len(parts)-1], "/") + "/"
	}
	return leading
}
// dirname returns the logical parent directory of the path.  This is different
// than path.Split() in that we want dirname("foo/bar/") -> "foo/", whereas
// path.Split() returns "foo/bar/".