go 基础网络连接 socket

一、server端

package main

import (
    "bufio"
    "fmt"
    "net"
)

func main() {
    listen, err := net.Listen("tcp", "192.168.0.113: 20000")
    if err != nil {
        fmt.Println("listen failed, err: ", err)
        return
    }
    for {
        connect, err := listen.Accept()
        if err != nil {
            fmt.Println("accept failed err: ", err)
            continue
        }
        go process(connect)
    }
}

func process(connect net.Conn) {
    defer connect.Close()
    for {
        reader := bufio.NewReader(connect)
        var buf [128]byte
        n, err := reader.Read(buf[:])
        if err != nil {
            fmt.Println("read from client failed , err : ", err)
            break
        }
        recvStr := "form server: " + string(buf[:n])
        fmt.Println("收到client端发来的数据: ", recvStr)
        connect.Write([]byte(recvStr))

    }
}

二 client

package main

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

func main() {
    conn, err := net.Dial("tcp", "192.168.0.113: 20000")
    if err != nil {
        fmt.Println("err: ", err)
        return
    }

    defer conn.Close()

    inputReader := bufio.NewReader(os.Stdin)
    for {
        intput, _ := inputReader.ReadString('\n')
        inputInfo := strings.Trim(intput, "\r\n")
        if strings.ToUpper(inputInfo) == "Q" {
            return
        }
        _, err := conn.Write([]byte(inputInfo))
        if err != nil {
            return
        }
        buf := [512]byte{}
        n, err := conn.Read(buf[:])
        if err != nil {
            fmt.Println("recv failed, err: ", err)
            return
        }
        fmt.Println(string(buf[:n]))
    }
}