public function export()
 {
     //http://admin.alarm.mix.sina.com.cn/?s=redis_tmp_log&a=get_tmp_log&_search_field=type&_search_keyword=1
     $type = $_GET['_search_keyword'];
     $fileName = "{$type}.txt";
     header("Cache-Control:public");
     header("Pragma:public");
     header("Content-type:APPLICATION/OCTET-STREAM");
     header("Content-Disposition:inline; filename={$fileName}");
     $i = 0;
     $limit = 100;
     while (true) {
         $start = (++$i - 1) * $limit;
         $stop = $start + $limit;
         $tmpLog = MyRedis::getTmpLog($type, $start, $stop);
         if (empty($tmpLog['messages'])) {
             break;
         }
         ob_start();
         echo implode("\n", $tmpLog['messages']);
         ob_end_flush();
     }
 }