.NET AWS S3存储操作类

背景：我们是公司内部搭建的存储 并不是使用公网云，可供参考

1、Nuget包  AWSSDK.S3

2、创建一个单利模式 操作类

using Amazon.S3;
using Amazon.S3.Model;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;

namespace H3C.AtendanceService.Common
{
    public class AWSS3Helper
    {
        private static AmazonS3Client _s3Client = null;
        private static readonly object _locker = new object();
        private static readonly string _accessKey = "s3的acesskey";
        private static readonly string _secretKey = "s3的secretKey";
        private static readonly string _s3url = "S3的host地址";//要带HTTP或者HTTPS
        private static AWSS3Helper _instance = null;
        private AWSS3Helper()
        {

        }
        /// <summary>
        /// 初始化
        /// </summary>
        /// <returns></returns>
        public static AWSS3Helper GetInStance()
        {
            if (_instance == null)
                lock (_locker)
                    if (_instance == null)
                    {
                        AmazonS3Config config = new AmazonS3Config();
                        config.ServiceURL = _s3url;
                        config.UseHttp = true;//根据实际情况
                        config.ForcePathStyle = true;
                        _s3Client = new AmazonS3Client(
                    _accessKey,
                    _secretKey,
                    config
                    );
                        _instance = new AWSS3Helper();
                    }
            return _instance;
        }

        /// <summary>
        /// 创建Bucket
        /// </summary>
        /// <param name="bucketName">bucketName</param>
        /// <param name="cancellationToken"></param>
        /// <returns></returns>
        public async Task<bool> CreateBucketAsync(string bucketName, CancellationToken cancellationToken = default)
        {
            if (await CheckBucketExistAsync(bucketName, cancellationToken)) return true;
            var buckectres = await _s3Client.PutBucketAsync(bucketName);
            if (buckectres?.HttpStatusCode == System.Net.HttpStatusCode.OK) return true;
            return false;
        }

        /// <summary>
        /// 创建Bucket
        /// </summary>
        /// <param name="bucketName">bucketName</param>
        /// <param name="cancellationToken"></param>
        /// <returns></returns>
        public bool CreateBucket(string bucketName)
        {
            if (CheckBucketExist(bucketName)) return true;
            var buckectres = _s3Client.PutBucket(bucketName);
            if (buckectres?.HttpStatusCode == System.Net.HttpStatusCode.OK) return true;
            return false;
        }

        /// <summary>
        /// 删除Bucket
        /// </summary>
        /// <param name="bucketName">bucketName</param>
        /// <param name="cancellationToken"></param>
        /// <returns></returns>
        public async Task<bool> DeleteBucketAsync(string bucketName, CancellationToken can