dialer,err := proxy.SOCKS5("tcp",tmpProxy.host,nil,proxy.Direct,	2 * time.Second,	4 * time.Second,	)	if err != nil {	log.Printf("[ERROR1] %s proxy.SOCKS5 %s\r\n", tmpProxy.host, err )	return false,0	}	// tcp connec timeout	connDealLine := time.Duration( 3 * time.Second )	conn, err := dialer.DialTimeout("tcp", CHECK_DOMAIN, connDealLine)