socket

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() #接受字符串，执行结果也是字符串
print("before send",len(cmd_res))
if len(cmd_res) ==0:
cmd_res = "cmd has no output..."

conn.send( str(len(cmd_res.encode())).encode("utf-8") ) #先发大小给客户端
#time.sleep(0.5)
#连续两个send会黏包，可以增加一个接受确认的选项，对方收到后发送确认返回
conn.send(cmd_res.encode("utf-8"))
print("send done")
os.path.isfile()
os.stat("sock")
server.close()