Download web pages or images from search result links.
    
    Args:
      dir_path (str):
        Path of directory to save downloads of :class:`api.results`.links

def download_links(self, dir_path):
    """Download web pages or images from search result links.
    
    Args:
      dir_path (str):
        Path of directory to save downloads of :class:`api.results`.links
    """
    links = self.links
    if not path.exists(dir_path):
      makedirs(dir_path)
    for i, url in enumerate(links):
      if 'start' in self.cseargs:
        i += int(self.cseargs['start'])
      ext = self.cseargs['fileType']
      ext = '.html' if ext == '' else '.' + ext
      file_name = self.cseargs['q'].replace(' ', '_') + '_' + str(i) + ext
      file_path = path.join(dir_path, file_name)
      r = requests.get(url, stream=True)
      if r.status_code == 200:
        with open(file_path, 'wb') as f:
          r.raw.decode_content = True
          shutil.copyfileobj(r.raw, f)