970 golang realizes the communication between multithreaded server and client

package main
 
import (
	"net"
	"fmt"
	"time"
)
 
func server(){
    
	listen_sock, err := net.Listen("tcp", "0.0.0.0:8888")
	if err != nil {
    
		fmt.Println("listen error")
		return;
	}
 
	defer listen_sock.Close()
 
	conn, err := listen_sock.Accept()
	if err != nil {
    
		fmt.Println("accept error")
		return;
	}
 
	defer conn.Close()
 
	buf := make([]byte, 100)
	for(true){
    
		n, err := conn.Read(buf)
		if err != nil {
    
			fmt.Println("conn closed")
			return
		}
		fmt.Println("msg size:", n, string(buf[0:n]))
	}
}
 
 
func client(){
    
	conn, err := net.Dial("tcp", "127.0.0.1:8888")
	if err != nil {
    
		fmt.Println("check server")
		return
	}
 
	defer conn.Close()
 
	for(true){
    
		s := []byte("abc")
		conn.Write(s)
		time.Sleep(1 * time.Second)
	}
}
 
 
func main(){
    
	go server()
	go client()
 
	time.Sleep(10 * time.Minute)
}