# -*- coding: UTF-8 -*-
import socket,os,time
server = socket.socket()
server.bind(('localhost',9999))
server.listen()
while True:
    conn,addr = server.accept()
    print("new conn:", addr)
    while True:
        print("等待新指令：")
        data = conn.recv(1024)
        if not data:
            print("客户端已断开")
            break
        print("执行指令:",data)
        cmd_res = os.popen(data.decode()).read()
        if len(cmd_res) == 0:
            cmd_res = "cmd has no outpu..."
        conn.send(str(len(cmd_res.encode())).encode('utf-8')) #整数不能encode，str可以
        #time.sleep(0.5)
        client_ack = conn.recv(1024)#wait client to confirm
        print("acr from client",client_ack)
        conn.send(cmd_res.encode('utf-8'))
        print("send done")
server.close()