rest/access_log_apache.go
func (u *accessLogUtil) StartTime() *time.Time {
	if u.R.Env["START_TIME"] != nil {
		return u.R.Env["START_TIME"].(*time.Time)
	}
	return nil
}
func (u *accessLogUtil) StartTime() *time.Time {
	if u.R.Env["START_TIME"] != nil {
		return u.R.Env["START_TIME"].(*time.Time)
	}
	return nil
}
// When the request entered the timer middleware.