http/log/log.go
func (this LogData) UrlUsername() string {
	if this.Request.URL.User != nil {
		return this.Request.URL.User.Username()
	}
	return ""
}
func (this LogData) UrlUsername() string {
	if this.Request.URL.User != nil {
		return this.Request.URL.User.Username()
	}
	return ""
}
// Extract username from the request url