go tcp c / s server client study notes

server1:
package main

import (
    "fmt"
    "net"
)

func main() {
    l, err := net.Listen("tcp", "127.0.0.1:9876")
    if err != nil {
        fmt.Println(err)
    }
    fmt.Println("服务器等待客户端连接")
    conn, err := l.Accept()
    if err != nil {
        fmt.Println(err)
    }
    defer conn.Close()
    fmt.Println("客户端建立连接 ")
    buf := make([]byte, 4096)
    n, err := conn.Read(buf)
    if err != nil {
        fmt.Println(err)
    }
    fmt.Println(string(buf[:n]))
    conn.Write(buf[:n])
}

client1:

package main

import (
    "fmt"
    "net"
)

func main() {
    conn, err := net.Dial("tcp", "127.0.0.1:9876")
    if err != nil {
        fmt.Println(err)
    }
    defer conn.Close()
    conn.Write([]byte("are you ready"))
    buf := make([]byte, 4096)
    n, err := conn.Read(buf)
    if err != nil {
        fmt.Println(err)
    }
    fmt.Println(string(buf[:n]))
}