port check

portcheck.go

package main

import (
	"fmt"
	"net"
	"time"
)

func main() {

	for port:=0; port <=8080 ; port++ {
		if testPort(fmt.Sprintf("127.0.0.1:%v", port)){
			fmt.Println("OPEN",port)
		}
	}
}

func testPort(address string) bool {
	conn, err := net.DialTimeout("tcp", address, time.Millisecond*200)
	if err != nil {
		return false
	}
	defer conn.Close()
	return true
}