在 Go 中如何实现同时监听客户端连接和终端输入？

package main

import (
    "fmt"
    "os"
)

var recvFromTerminalChan = make(chan string)
var recvFromNetChan = make(chan string)

func main() {
    go readFromTerminal()

    for {
        select {
        case str := <-recvFromTerminalChan:
            go sendCommandToNet(str)
        case str := <-recvFromNetChan:
            go doContentFromNet(str)
        }
    }
}

// 读取从终端输入的内容
func readFromTerminal() {
    var input string

    for {
        fmt.Scan(&input)
        fmt.Println("input content : ", input)
        recvFromTerminalChan <- input
    }
}

// 发送内容到网络
func sendCommandToNet(command string) {
    fmt.Println("command : ", command)

    if command == "quit" {
        close(recvFromTerminalChan)
        close(recvFromNetChan)
        os.Exit(0)
    }

    content := command

    recvFromNetChan <- content
}

// 处理从网络接受到的数据
func doContentFromNet(content string) {
    fmt.Println("content from net : ", content)
}