/// <summary>
        ///
        /// </summary>
        /// <param name="page"></param>
        /// <param name="size"></param>
        /// <returns></returns>
        public Task <IEnumerable <DownloadStatistics> > GetDownloadStatisticsListAsync(int page, int size)
        {
            var redisQueue = new RedisQueue(_options.GetRedisOptions);
            //队列
            var list = redisQueue.Gets <DownloadStatistics>(Const.RedisStatisticsDownload);

            list = list.Skip((page - 1) * size).Take(size).ToList();

            return(Task.FromResult <IEnumerable <DownloadStatistics> >(list));
        }
        /// <summary>
        ///
        /// </summary>
        /// <param name="page"></param>
        /// <param name="size"></param>
        /// <returns></returns>
        public Task <IEnumerable <SpiderStatistics> > GetSpiderStatisticsListAsync(int page, int size)
        {
            var redisQueue = new RedisQueue(_options.GetRedisOptions);

            var list = redisQueue.Gets <SpiderStatistics>("Count");

            list = list.Skip((page - 1) * size).Take(size).ToList();

            return(Task.FromResult <IEnumerable <SpiderStatistics> >(list));
        }