uri.go
func (u *URI) HostPort() string {
	s := fmt.Sprintf("%s:%d", u.host, u.port)
	return s
}
func (u *URI) HostPort() string {
	s := fmt.Sprintf("%s:%d", u.host, u.port)
	return s
}
func ( u * URI ) HostPort ( ) string { s := fmt . Sprintf ( " " , u . host , u . port ) return s }
// HostPort returns `Host:Port`
HostPort returns Host : Port