check-tcp-socket-liveness-in-golang

main.go

package main

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

func main() {
	// Connect to the server
	// conn, err := net.Dial("tcp", "localhost:8080")
	conn, err := net.Dial("tcp", "1.2.3.4:80")
	if err != nil {
		fmt.Println(err)
		return
	}

	for {
		// Send some data to the server
		_, err = conn.Write([]byte("GET / HTTP/1.1\nHost: example.com\nConnection: keep-alive\n\n"))
		if err != nil {
			fmt.Println(err)
			return
		}

		var buff [1024]byte
		_, err = conn.Read(buff[:])
		if err != nil {
			fmt.Println(err)
			return
		} else {
			fmt.Println("Socket is still open...")
		}

		time.Sleep(2 * time.Second)
	}

	// var buff [1024]byte
	// i, err2 := conn.Read(buff[:])
	// if err2 != nil {
	// 	fmt.Println(err2)
	// 	return
	// } else {
	// 	fmt.Println(string(buff[:i]))
	// }

	// Close the connection
	conn.Close()
}