server.go

package main

import (
    "fmt"
    "net"
)

// create tcp server
func main() {
    listener, err := net.Listen("tcp", ":8081")
    if err != nil {
        panic(err)
    }
    defer listener.Close()
    fmt.Println("TCP Server listening on port 8081")
    for {
        conn, err := listener.Accept()
        if err != nil {
            panic(err)
        }
        go handleConnection(conn)
    }
}

// create handler
func handleConnection(conn net.Conn) {
    //defer conn.Close()
    for {
        buf := make([]byte, 1024)
        n, err := conn.Read(buf)
        if err != nil {
            fmt.Println(err)
            return
        }
        // if n == 0 {
        //  return
        // }
        conn.Write(buf[:n])
    }
}