Python实现获取域名所用服务器的真实IP

class JianKong():
  '''查询IDC信息，封ip和过白名单'''
  def __init__(self):
    pass
  @classmethod
  def ip_verify(cls,str):
    '验证IP地址规范'
    pattern=re.compile('(25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]"by2\">\.(.*?)\&nbsp;</td>', re.S)
    for i in range(1,23):
      data='domainName=&domainBlur=0&page.pageSize=20&pageNo='+str(i)+'&jumpPageNo='+str(i)
      header={'Host':'www.miitbeian.gov.cn','Origin':'http://www.miitbeian.gov.cn','User-Agent':'Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/44.0.2403.157 UBrowser/5.5.6125.14 Safari/537.36','Referer':'http://www.miitbeian.gov.cn/basecode/query/queryDomain.action;jsessionid=HSTRWpLZbR0cX4vFkDpnpbNBYyRl4GwW1fxpyhdyc0fcfhkvJTBV!1139295987'}
      url='http://www.miitbeian.gov.cn/basecode/query/queryDomain.action;jsessionid=HSTRWpLZbR0cX4vFkDpnpbNBYyRl4GwW1fxpyhdyc0fcfhkvJTBV!1139295987'
      request=urllib2.Request(url,data,header)
      response=urllib2.urlopen(request)
      recv=response.read()
      s=p.findall(recv)
      #print s
      #去重
      s=list(set(s))
      for y in s:
        file.write(y+'\n')
        file.flush()
        #print str(i)+' '+y
    file.close()
    print '完毕'#弹窗完成