技術標籤：go langgogolang網路通訊

傳送給伺服器要用 utf8 編碼方式

package main

import (
	"fmt"
	"net"
)

var serverChan chan bool = make(chan bool, 1)

func OpenTcpSever(ipAndPort string) {
	var err error
	var tcpListener net.Listener
	tcpListener, err = net.Listen("tcp", ipAndPort)
	if
 
 err != nil {
		serverChan <- false
		return
	}

	defer tcpListener.Close()
	serverChan <- true
	for {
		con, err := tcpListener.Accept()
		if err != nil {
			continue
		}
		fmt.Println(con.RemoteAddr(), "客戶端連線成功.")
		go AccessClient(con)
	}
}

func AccessClient(con net.Conn) {
	buffer :=
 
 make([]byte, 1024*2)
	var (
		recNu     int
		err       error
		resSplice []byte
	)
	defer con.Close()
	for {
		recNu, err = con.Read(buffer)
		if err != nil {
			break
		}
		fmt.Printf("服務端收到客戶端[%v]命令：%v\n", con.RemoteAddr(), string(buffer[:recNu]))
		resSplice = responStr(buffer[:recNu])
 

		_, err = con.Write(resSplice)
		if err != nil {
			break
		} else {
			fmt.Printf("服務端回覆客戶端[%v]命令：%v\n", con.RemoteAddr(), string(resSplice))
		}
	}
	fmt.Println(con.RemoteAddr(), "異常退出！")

}

func main() {
	//1. 開啟一個監聽服務端
	serverIP := "127.0.0.1:5200"
	go OpenTcpSever(serverIP)
	//2. 檢驗服務是否開啟成功
	serBl := <-serverChan

	if serBl {
		fmt.Println("監聽本地埠", serverIP, "成功，等待客戶端連線。")
		fmt.Println("輸入quite退出服務端...")
		var uIn string
		for {
			fmt.Scanln(&uIn)
			if uIn == "quite" {
				break
			}
			fmt.Println("輸入退出命令錯誤！！！請輸入quite退出服務端")
		}
	} else {
		fmt.Println("監聽本地埠", serverIP, "失敗！")
	}
	close(serverChan)
}

//根據伺服器接收到的命令去返回命令
func responStr(data []byte) []byte {
	recStr := string(data)
	resStr := "你說啥..."
	switch recStr {
	case "who are you?":
		resStr = "我是小兵張嘎"
	case "你的性別?":
		resStr = "你猜猜看啦"
	case "你會什麼":
		resStr = "我會講故事"
	case "你講個吧":
		recStr = "從前有座bai山，山上有座廟，du廟裡有個老和尚，老zhi和尚的dao身邊有三個和尚——頑皮zhuan的小和尚、貪吃的shu胖和尚和匆忙的瘦和尚，老和尚在給三個和尚講故事，故事是這樣的：一個和尚挑水吃，兩個和尚抬水吃，三個和尚沒水吃。"
	default:

	}
	return []byte(resStr)
}