端口监控

import socket,os,time
def getstrtime():
   return time.strftime("%Y-%m-%d %H:%M:%S", time.localtime())

def connecthost(ip,port):
    sk1 = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    sk1.settimeout(5)
    try:
        sk1.connect((ip,port))
        msg = getstrtime() + ' ' + ip + ' ' + str(port) + ' '+ "端口开启"
        msg = ''
        return msg
    except Exception as e:
        msg = getstrtime() + ' ' + ip + ' ' + str(port) + ' ' + "端口已关闭"
        return msg
    sk1.close()
while True:
    getstrtime()
    f = open(file='monitor.txt', mode='r')
    dada = f.read()
    f.seek(0)
    for line in f:
        line = line.split()
        ip,port = line
        ret = connecthost(ip, int(port))
        try:
            flogs = open(file='logs.txt', mode='a')
            if ret != '':
              flogs.write(ret + '\n')
              print(ret)
        except:
            flogs.close()