AWSS3异步等待上传成功返回结果

        /// <summary>
        /// 流上传文件
        /// </summary>
        /// <param name="data">流内容</param>
        /// <param name="key">文件名（标识）</param> 
        /// <returns></returns>
        public async Task<bool> UploadFile(byte[] data,string contentType,  string key)
        {
            try
            {  
                Stream s = (Stream)new MemoryStream(data);
                PutObjectRequest request = new PutObjectRequest();
                request.BucketName = AwsOptions.OpenBucket;
                request.Key = key;
                request.ContentType = contentType;               
                request.InputStream = s;

                using (var ss =  S3Client.PutObjectAsync(request))
                {
                    //等待结果返回
                    while (ss.IsCompleted == false)
                    {
                        Console.Write(".");
                        //每隔2秒检查一次
                        System.Threading.Thread.Sleep(1000);
                    }
                    //返回上传是否成功
                    return ss.IsCompletedSuccessfully;
                }
            }
            catch (AmazonS3Exception e)
            {
                //Console.WriteLine("Error encountered on server. Message:'{0}' when writing an object", e.Message);
                throw new Exception(e.Message);
            }
            catch (Exception e)
            {
                throw new Exception($"图片上传错误:{e.Message + e.StackTrace}");
            }
            return true;
        }