#-*- coding:utf-8 -*-

import socket

import struct

import time

import win32api

import os

import re

def getTime(TimeServerAddresses):

    TIME_1970 = 2208988800L

    client = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)

    client.settimeout(3)

    data = '\x1b' + 47 * '\0'

    #TimeServer_ip=socket.gethostbyname('cn.pool.ntp.org')

    #TimeServer_ip='202.118.1.130'

    Port=123

    for address in TimeServerAddresses:

        success=False

        count=0

        while not success and count<3:

            print address,count

            try:

                client.sendto(data, (address, Port))

                data, address = client.recvfrom(1024)

                success=True

            except socket.timeout:

                print 'Request timed out!'

                count=count+1

        if success==True:a

            break

    data_result = struct.unpack('!12I', data)[10]

    data_result -= TIME_1970

    return data_result

def setSystemTime(now_time):

    tm_year, tm_mon, tm_mday, tm_hour, tm_min, tm_sec, tm_wday, tm_yday, tm_isdst = time.gmtime(now_time)

    win32api.SetSystemTime(tm_year, tm_mon, tm_wday, tm_mday, tm_hour, tm_min, tm_sec, 0)

    print "Set System OK!"

def getServerIP():

    res1=os.popen('nslookup cn.pool.ntp.org')

    result1=res1.read()

    addresses=result1.split('\n\n')[1].split('\n')[1][12:].split(',')

    return addresses

    #for address in addresses:

    #    res=os.popen('ping -n 2 '+address)

    #    result=res.read()

    #    received_num=int(re.findall('Received = [0-9]',result)[0].split('=')[1])

    #    if received_num > 1:

    #        break

    #TimeServer=address

if __name__ == '__main__':

    addresses=getServerIP()

    now_time=getTime(addresses)

    setSystemTime(now_time)

    print "%d-%d-%d %d:%d:%d" % time.localtime(now_time)[:6]