A TCP echo client demo.

tcp-echo-client-with-bufio.go

package main

import (
    "os"
    "fmt"
    "net"
    "time"
    "bufio"
)

func main() {
    conn, err := net.Dial("tcp", "localhost:4567")
    if err != nil {
        fmt.Printf("Dial error: %s\n", err)
        os.Exit(1)
    }

    reader := bufio.NewReader(conn)
    writer := bufio.NewWriter(conn)

    for {
        now := time.Now().Format(time.RFC3339)

        writer.WriteString(now + "\n")
        writer.Flush()

        line, err := reader.ReadString('\n')
        if err != nil {
            fmt.Printf("ReadString error: %s\n", err)
            conn.Close()
            break
        }

        fmt.Printf(line)

        time.Sleep(1000 * time.Millisecond)
    }
}