Implementation of socket heartbeat detection in GoLang

package main

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

func main() {
    // Start the TCP server    listener, err := ("tcp", ":8080")
    if err != nil {
        ("Error starting server:", err)
        return
    }
    defer ()

    ("Server is listening on port 8080")

    for {
        conn, err := ()
        if err != nil {
            ("Error accepting connection:", err)
            continue
        }
        go handleConnection(conn)
    }
}

func handleConnection(conn ) {
    defer ()
    buffer := make([]byte, 1024)

    for {
        // Read data        n, err := (buffer)
        if err != nil {
            ("Connection closed:", err)
            return
        }
        ("Received:", string(buffer[:n]))

        // Respond to heartbeat messages        if string(buffer[:n]) == "pong" {
            ([]byte("pong"))
        }
    }
}

package main

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

func main() {
    // Connect to the server    conn, err := ("tcp", "localhost:8080")
    if err != nil {
        ("Error connecting to server:", err)
        return
    }
    defer ()

    // Define the heartbeat interval    ticker := (2 * )
    defer ()

    go func() {
        for {
            <-
            _, err := ([]byte("ping"))
            if err != nil {
                ("Error sending heartbeat:", err)
                return
            }
            ("ping")
        }
    }()

    // Read server response    buffer := make([]byte, 1024)
    for {
        n, err := (buffer)
        if err != nil {
            ("Error reading from server:", err)
            return
        }
        ("Received:", string(buffer[:n]))
    }
}