Golang net包实现网络通信方法详解

listener, err := net.Listen("tcp", ":8080")
if err != nil {
    log.Fatal(err)
}
defer listener.Close()

for {
    conn, err := listener.Accept()
    if err != nil {
        log.Print(err)
        continue
    }
    go handleConnection(conn)
}

func handleConnection(conn net.Conn) {
    defer conn.Close()
    buf := make([]byte, 1024)
    n, err := conn.Read(buf)
    if err != nil {
        log.Print(err)
        return
    }
    response := "收到: " + string(buf[:n])
    conn.Write([]byte(response))
}

conn, err := net.Dial("tcp", "localhost:8080")
if err != nil {
    log.Fatal(err)
}
defer conn.Close()

conn.Write([]byte("Hello Server"))
buf := make([]byte, 1024)
n, _ := conn.Read(buf)
fmt.Println(string(buf[:n]))

conn, err := net.ListenPacket("udp", ":8080")
if err != nil {
    log.Fatal(err)
}
defer conn.Close()

buf := make([]byte, 1024)
for {
    n, addr, err := conn.ReadFrom(buf)
    if err != nil {
        log.Print(err)
        break
    }
    fmt.Printf("收到来自 %s 的消息: %s\n", addr, string(buf[:n]))
    conn.WriteTo([]byte("已接收"), addr)
}

conn, err := net.Dial("udp", "localhost:8080")
if err != nil {
    log.Fatal(err)
}
defer conn.Close()

conn.Write([]byte("UDP消息"))
buf := make([]byte, 1024)
n, _ := conn.Read(buf)
fmt.Println("响应:", string(buf[:n]))

ip := net.ParseIP("192.168.1.1")
if ip.IsPrivate() {
    fmt.Println("这是一个私有IP")
}

os.Remove("/tmp/socket") // 清理旧文件
l, err := net.Listen("unix", "/tmp/socket")
if err != nil {
    log.Fatal(err)
}
defer l.Close()

conn, err := l.Accept()
if err != nil {
    log.Print(err)
}
// 处理 conn...

conn, err := net.Dial("unix", "/tmp/socket")
if err != nil {
    log.Fatal(err)
}
defer conn.Close()