server

import socket
import datetime
s=socket.socket(socket.AF_INET,socket.SOCK_STREAM)
s.bind(('127.0.0.1',9999))
s.listen(1)
starttime = None
endtime = None
def Wait_connection():
    global starttime
    s.settimeout(None)
    conn,addr=s.accept()
    starttime = datetime.datetime.now()
    print(
 
'client addr',addr)
    client_msg=conn.recv(1024)
    print('client msg: %s' %(str(client_msg,'utf-8')))
    keep_alive()
def keep_alive():
    global endtime
    a = 1
    while a==1:
        try:
            s.settimeout(5)
            print('---------------------------------')
            conn,addr
 
=s.accept()
            print('client addr',addr)
            client_msg=conn.recv(1024)#客戶端傳送過來的訊息
            print('client msg: %s' %(str(client_msg,'utf-8')))
        except:
            a = 2
            endtime = datetime.datetime.now()
    print('連線已斷開，本次連線持續 %s 秒'%str((endtime - starttime).seconds))
    Wait_connection()
 
if __name__ == '__main__':
    Wait_connection()

client

import socket
import time
a = 0
while True:
    time.sleep(4)
    a+=1
    s=socket.socket(socket.AF_INET,socket.SOCK_STREAM)
    s.connect(('127.0.0.1',9999))
    keepclass = "我已連線"+str(a*4)+"秒"
    s.send(bytes(keepclass,'UTF-8'))#向服務端傳送訊息