MinIO/IBKLinker-Minio/Common/MinioBusinessLogic.cs

using log4net;
using System;
using System.Collections.Generic;
using System.Reflection;
using System.Threading.Tasks;
using Minio;
using System.IO;
using IBKLinker_Minio.Entity.MinioController;
using SOA.Objects;
using SOA.Persistent;
using System.Configuration;
using IBKLinker_Minio.Controller.MinioController;

namespace IBKLinker_Minio.Common
{
    /// <summary>
    /// 作者：孙亮
    /// 编写时间：2023-10-13
    /// 编写内容：minio业务逻辑
    /// </summary>
    public class MinioBusinessLogic
    {
        private static readonly ILog logger = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
        #region 异步处理取minio文件流数据方法
        /// <summary>
        /// 异步处理取minio文件流数据方法
        /// </summary>
        public async Task<string> Download(string BuckeName, string path)
        {

            MemoryStream memoryStream = new MemoryStream();
            try
            {
                var minio = ConnectMinIO();//调用连接minio数据库方法  
                BuckeName = GetBuckName();//调用取桶名称方法
                await minio.GetObjectAsync(BuckeName, path, (stream) =>
                {
                    stream.CopyTo(memoryStream);//将文件去除复制到memoryStream
                });
                memoryStream.Position = 0;//清除
                string base64String = Convert.ToBase64String(memoryStream.ToArray());//转换base64
                return base64String;//返回值
            }
            catch (Exception ex) 
            {
                logger.InfoFormat("MinioBusinessLogic/Download方法错误：" + ex.ToString());
                throw;
            }
        }
        #endregion

        #region 文件上传操作日志记录
        /// <summary>
        /// 文件上传操作日志记录
        /// </summary>
        public void MinioOperationLog(string OperateUser, string FileName, string Operate, string FilePk, string FileUPk, IDbContext db) //传参为操作人、文件名、操作、数据库连接上下文对象
        {
            try
            {
                MinioOperationlog MOdata = new MinioOperationlog();
                DateTime time = DateTime.Now;//时间
                MOdata.Pk = Convert.ToInt32(db.QueryScalar("select S_MINIO_OPERATIONLOG.nextval from dual"));///拿到表自增长的值赋值给自增长主键pk;
                MOdata.OperateUser = OperateUser;//操作者
                MOdata.OperateTime = time;//操作时间
                MOdata.FilePk = FilePk.ToString();//文件pk
                MOdata.FileUPk = FileUPk.ToString();//文件父级pk
                MOdata.FileName = FileName;//文件名
                MOdata.Operater = OperateUser + Operate + FileName;//操作（操作人，加操作，加文件名称）
                MOdata.CreationTime = time;//创建时间
                db.Insert<MinioOperationlog>(MOdata);//写入数据库
            }
            catch (Exception ex)
            {
                logger.InfoFormat("MinioBusinessLogic/MinioOperationLog方法错误：" + ex.ToString());
                throw;
            }

        }
        #endregion
        #region 文件夹递归查询
        /// <summary>
        /// 文件夹递归查询
        /// </summary>
        public List<StoragePath> GetSubDirectories(int parentPk)
        {
            List<StoragePath> subDirs = new List<StoragePath>();

            foreach (var subDir in MinioApiController.rootDirectories)
            {
                if (subDir.Upk == parentPk)
                {
                    RequstStoragePath subDirModel = new RequstStoragePath();
                    subDirModel.Pk = subDir.Pk;//主键ID
                    subDirModel.Upk = subDir.Upk;//父级文件夹pk
                    subDirModel.FileName = subDir.FileName;//文件名称
                    subDirModel.FilePath = subDir.FilePath;//文件路径
                    subDirModel.FileType = subDir.FileType;//文件类型
                    subDirModel.FileLevel = subDir.FileLevel;//层级
                    subDirModel.CreatorTime = subDir.CreatorTime;//创建时间
                    subDirModel.CreatorUser = subDir.CreatorUser;//创建者
                    subDirModel.DownloadNum = subDir.DownloadNum;//下载次数
                    subDirModel.ModifyUsers = subDir.ModifyUsers;//修改用户
                    subDirModel.ModifyTime = subDir.ModifyTime;//修改时间
                    subDirModel.ClearUsers = subDir.ClearUsers;//删除用户
                    subDirModel.ClearTime = subDir.ClearTime;//删除时间
                    subDirModel.ClearFlag = subDir.ClearFlag;//删除标记 0未删除 1删除
                    subDirModel.DocumentType = subDir.DocumentType;//文件种类：1、技术协议 2、质量要点 3、工艺卡 4、其他
                    subDirModel.requstStoragePaths = GetSubDirectories(subDir.Pk); // 递归调用获取子文件夹
                    subDirs.Add(subDirModel);
                }
            }
            return subDirs;
        }
        #endregion

        #region 连接minio数据库公用方法
        /// <summary>
        /// 连接minio数据库公用方法
        /// </summary>
        public MinioClient ConnectMinIO() 
        {
            string MinIOIp = ConfigurationManager.AppSettings["MinIOIp"];//minio数据库连接地址
            string MinIOName = ConfigurationManager.AppSettings["MinIOName"];//minio数据库连接用户名
            string MinIoPass = ConfigurationManager.AppSettings["MinIoPass"];//minio数据库连接密码
            MinioClient minio = new MinioClient(MinIOIp, MinIOName, MinIoPass);//连接所需minio所在地址、登录名、密码   
            return minio;
        }
        #endregion

        #region 取minio数据库中桶名称
        /// <summary>
        /// 取minio数据库中桶名称
        /// </summary>
        public string GetBuckName() 
        {
            string BuckName = ConfigurationManager.AppSettings["BuckName"];//minio数据库连接地址
            return BuckName;
        }
        #endregion

        #region 公用方法
        /// <summary>
        /// 矫正pk值
        /// </summary>
        /// <param name="sequenceName"></param>
        /// <param name="tableName"></param>
        /// <returns></returns>
        public Int32 getPk(String sequenceName, String tableName)
        {
            ///创建数据库连接上下文对象
            using (IDbContext db = ObjectContainer.GetObject<IDbContext>("db"))
            {
                ///拿到表自增长序列最大pk值
                int pk_SequenceCurrentMax = Convert.ToInt32(db.QueryScalar("select " + sequenceName + ".nextval from dual"));
                ///拿到表目前最大pk值
                Object pk_TableCurrentMaxObj = db.QueryScalar("select t.pk from " + tableName + " t where rownum <=1  order by t.pk desc");
                int pk_TableCurrentMax = pk_SequenceCurrentMax;
                //如果表最大值查询结果不为空进行对比，
                if (pk_TableCurrentMaxObj != null)
                {
                    pk_TableCurrentMax = Convert.ToInt32(pk_TableCurrentMaxObj);
                    //拿到表中最大值和序列最大值之间的差值
                    int num_BetweenTableSequence = pk_TableCurrentMax - pk_SequenceCurrentMax + 1;
                    //更改序列递增规则，使下一次拿到的序列号比表中最大pk大1
                    db.QueryScalar("alter sequence " + sequenceName + " increment by " + num_BetweenTableSequence.ToString());
                    //执行nexval拿到下一个序列号
                    pk_TableCurrentMax = Convert.ToInt32(db.QueryScalar("select " + sequenceName + ".nextval from dual"));
                    //更改序列递增规则为每次递增一个。
                    db.QueryScalar("alter sequence " + sequenceName + " increment by 1");
                }
                return pk_TableCurrentMax;
            }
        }
        /// <summary>
        /// 编写内容：下载文件转换流数据方法
        /// </summary>
        public string Base64(string FilePath)
        {
            string data = "";
            try
            {
                using (MemoryStream msReader = new MemoryStream())
                {
                    using (FileStream fs = new FileStream(FilePath, FileMode.Open))
                    {
                        byte[] buffer = new byte[1024];
                        int readLen = 0;
                        while ((readLen = fs.Read(buffer, 0, buffer.Length)) > 0)
                        {
                            msReader.Write(buffer, 0, readLen);
                        }
                    }
                    data = Convert.ToBase64String(msReader.ToArray());//转换base64
                }
                return data;//返回值
            }
            catch (Exception ex)
            {
                logger.InfoFormat(ex.ToString());
                throw;
            }
        }
        #endregion

        
    }
}