/**
  * Get bucket list for credential
  * @param $key_id
  * @param $secret_key
  * @return array
  * @throws Exception
  */
 public static function get_bucket_list($key_id, $secret_key)
 {
     require_once PATH_THIRD . 'assets/sources/s3/lib/Assets_S3.php';
     $s3 = new Assets_S3($key_id, $secret_key);
     $buckets = @$s3->listBuckets();
     if (empty($buckets)) {
         throw new Exception(lang('wrong_credentials'));
     }
     $bucket_list = array();
     foreach ($buckets as $bucket) {
         $location = $s3->getBucketLocation($bucket);
         $bucket_item = array('bucket' => $bucket, 'location' => $location, 'url_prefix' => 'http://' . self::get_endpoint_by_location($location) . '/' . $bucket . '/');
         $bucket_list[$bucket] = (object) $bucket_item;
     }
     return $bucket_list;
 }