text: from app.thirdparty.oneforall.common.query import Query
  
  
  class QianXun(Query):
      def __init__(self, domain):
          Query.__init__(self)
          self.domain = domain
          self.module = 'Query'
          self.source = 'QianXunQuery'
  
      def query(self):
          """
          向接口查询子域并做子域匹配
          """
          self.header = self.get_header()
          self.proxy = self.get_proxy(self.source)
  
          num = 1
          while True:
              data = {'ecmsfrom': '',
                      'show': '',
                      'num': '',
                      'classid': '0',
                      'keywords': self.domain}
              url = f'https://www.dnsscan.cn/dns.html?' \
                    f'keywords={self.domain}&page={num}'
              resp = self.post(url, data)
              subdomains = self.match_subdomains(resp)
              if not subdomains:  # 没有发现子域名则停止查询
                  break
              self.subdomains.update(subdomains)
              if '<div id="page" class="pagelist">' not in resp.text:
                  break
              if '<li class="disabled"><span>&raquo;</span></li>' in resp.text:
                  break
              num += 1
  
      def run(self):
          """
          类执行入口
          """
          self.begin()
          self.query()
          self.finish()
          self.save_json()
          self.gen_result()
          self.save_db()
  
  
  def run(domain):
      """
      类统一调用入口
  
      :param str domain: 域名
      """
      query = QianXun(domain)
      query.run()
  
  
  if __name__ == '__main__':
      run('example.com')
  