'æåŒsocket'

def get_req(self, start_size, end_size):

    logger.debug(('DownloadBatch.get_req:    %s,    %s' % (start_size, end_size)))
    opener = request.build_opener()
    content_range = 'bytes={0}-{1}'.format(start_size, end_size)
    opener.addheaders = [('Range', content_range), ('User-Agent', const.USER_AGENT), ('Referer', const.PAN_REFERER)]
    for i in range(RETRIES):
        try:
            return opener.open(self.url, timeout=self.timeout)
        except OSError:
            logger.error(traceback.format_exc())
            self.queue.put((self.id_, BATCH_ERROR), block=False)
            return None
        except:
            self.queue.put((self.id_, BATCH_ERROR), block=False)
            return None
    else:
        return None
