MinIO （三）使用Webhook实时同步文件

news2025/3/13 7:44:07

前言

使用MinIO的过程中，我们这里遇到个需求，系统需要预览3D文件，前端操作，用浏览3D文件的工具打开3D文件的目录即可实现在线预览功能，这个时候问题来了，MinIO上传文件后进行了编译，如下图

这个时候在想读取文件（比如xx\xx\bb.txt），是读取不到的，所以，要在上传文件的时候再其他文件夹内，把上传的文件保存下来，给前端读取使用。一开始想的是放到同文件夹下，但是测试发现，虽然MinIO上传的文件夹名字是bb.txt，但是保存的文件无法与bb.txt文件夹放到同一目录下。

第一步开发同步文件的程序

新建一个WebApi项目，其中配置信息与上一篇文章一样，这里不在赘述，主要讲一下区别点

配置中的"BucketDirectory": "D:\\aaa\\bbb\\ccc"，是指文件要保存的目录

保存文件的主要代码

using Microsoft.AspNetCore.Mvc;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.Logging;
using Minio;
using Newtonsoft.Json;
using System.IO;
using System.Linq;
using System.Threading.Tasks;

namespace MinIOTest.Controllers
{
    public class MinioCallbackController : ControllerBase
    {
        private static string _bucketName = string.Empty;//"demo";//默认桶

        private readonly MinioClient _client;
        private readonly IConfiguration _configuration;
        private readonly ILogger<MinioCallbackController> _logger;

        public MinioCallbackController(MinioClient client,
            IConfiguration configuration,
            ILogger<MinioCallbackController> logger)
        {
            _client = client;
            _configuration = configuration;
            _bucketName = configuration["MinIO:Bucket"];
            _logger = logger;
        }

        [Route("/path")]  //这里不能随便改，要与webhook配置的路径对应
        [HttpPost]
        //public IActionResult Post([FromBody]Dictionary<string,object> args)
        public async Task<IActionResult> CallBack([FromBody] object args)
        {
            try
            {
                //_logger.LogInformation("aaaaaaaaaaa");

                string jsonStr = args.ToString();
                var jsonObj = JsonConvert.DeserializeObject<Root>(jsonStr);
                string bucketDirectory = _configuration["MinIO:BucketDirectory"];//文件保存目录
                var pathAll = jsonObj.Key;//获取文件路径
                var fileName = pathAll.Split('/').Last();

                //新增
                if (jsonObj.EventName.Contains("Put"))
                {
                    if (!System.IO.File.Exists(bucketDirectory))
                    {
                        DirectoryInfo directoryInfo = new DirectoryInfo(bucketDirectory);
                        directoryInfo.Create();
                    }

                    var memoryStream = new MemoryStream();
                    var path = jsonObj.Key.Substring(pathAll.IndexOf('/') + 1, pathAll.Length - pathAll.IndexOf('/') - 1);
                    await _client.GetObjectAsync(_bucketName, path,
                                    (stream) =>
                                    {
                                        stream.CopyTo(memoryStream);
                                    });

                    using FileStream targetFileStream = new FileStream($"{bucketDirectory}\\{fileName}", FileMode.OpenOrCreate);

                    memoryStream.WriteTo(targetFileStream);
                }
                else if (jsonObj.EventName.Contains("Delete"))
                {
                    var path = $"{bucketDirectory}\\{fileName}";
                    System.IO.File.Delete(path);
                }


                return Ok();
            }
            catch (System.Exception ex)
            {
                _logger.LogError($"ERROR:{ex}");
            }

            return null;
        }

    }
}

注意路由[Route("/path")]，这里是一个路径，要与下面配置Webhook时的路径一致。

Root类

这个实体写复杂了，其实只要第一层结构就行，这里往里面加了好几层，按实际情况来吧。

using MinIOTest;
using System.Collections.Generic;

namespace MinIOTest
{

    public class ValueKind
    {

    }
    
    public class UserIdentity
    {
        /// <summary>
        /// 
        /// </summary>
        public string principalId { get; set; }
    }

    public class @object
    {
        /// <summary>
        /// 
        /// </summary>
        public string key { get; set; }
        /// <summary>
        /// 
        /// </summary>
        public int size { get; set; }
        /// <summary>
        /// 
        /// </summary>
        public string eTag { get; set; }
        /// <summary>
        /// 
        /// </summary>
        public string contentType { get; set; }
        /// <summary>
        /// 
        /// </summary>
        public object userMetadata { get; set; }
        /// <summary>
        /// 
        /// </summary>
        public string sequencer { get; set; }
    }

    public class S3
    {
        /// <summary>
        /// 
        /// </summary>
        public string s3SchemaVersion { get; set; }
        /// <summary>
        /// 
        /// </summary>
        public string configurationId { get; set; }
        /// <summary>
        /// 
        /// </summary>
        public object bucket { get; set; }
        /// <summary>
        /// 
        /// </summary>
        public @object @object { get; set; }
    }

    public class Source
    {
        /// <summary>
        /// 
        /// </summary>
        public string host { get; set; }
        /// <summary>
        /// 
        /// </summary>
        public string port { get; set; }
        /// <summary>
        /// 
        /// </summary>
        public string userAgent { get; set; }
    }

    public class RecordsItem
    {
        /// <summary>
        /// 
        /// </summary>
        public string eventVersion { get; set; }
        /// <summary>
        /// 
        /// </summary>
        public string eventSource { get; set; }
        /// <summary>
        /// 
        /// </summary>
        public string awsRegion { get; set; }
        /// <summary>
        /// 
        /// </summary>
        public string eventTime { get; set; }
        /// <summary>
        /// 
        /// </summary>
        public string eventName { get; set; }
        /// <summary>
        /// 
        /// </summary>
        public UserIdentity userIdentity { get; set; }
        /// <summary>
        /// 
        /// </summary>
        public object requestParameters { get; set; }
        /// <summary>
        /// 
        /// </summary>
        public object responseElements { get; set; }
        /// <summary>
        /// 
        /// </summary>
        public S3 s3 { get; set; }
        /// <summary>
        /// 
        /// </summary>
        public Source source { get; set; }
    }

    public class Root
    {
        /// <summary>
        /// 
        /// </summary>
        public string EventName { get; set; }
        /// <summary>
        /// demo/工程图纸/001/bb.txt
        /// </summary>
        public string Key { get; set; }
        /// <summary>
        /// 
        /// </summary>
        public List<RecordsItem> Records { get; set; }
    }



}