MINIO是提供.NET SDK的,但是这么老的版本没找到,于是使用http的方式直接调用,方便简单。
我这里需求不复杂,只需要上传下载删除即可,如果后续有需求再补充方法。
核心代码MinioHttpOperatorDemo如下:- using System;
- using System.IO;
- using System.Net;
- using System.Text;
- using System.Collections.Specialized; // For NameValueCollection, though not directly used in this version, good to keep for potential expansion.
- using System.Security.Cryptography; // For HMACSHA256, SHA256Managed
- using System.Globalization; // For CultureInfo.InvariantCulture
- using System.Collections.Generic; // For SortedList
- using System.Linq; // For string.Join and other LINQ operations
- using System.Xml.Linq;
- namespace MinioHttpOperatorDemo
- {
- /// <summary>
- /// MinIO HTTP 操作类,适用于 .NET Framework 4.0 环境,不依赖 MinIO SDK。
- /// 使用 HttpWebRequest 和 HttpWebResponse 进行文件上传、下载和删除操作。
- /// 已加入 AWS Signature Version 4 认证的简化实现,并进行了进一步的完善。
- /// </summary>
- public class MinioHttpOperator
- {
- private readonly string _minioEndpoint; // MinIO 服务器的端点地址,例如: http://localhost:9000
- private readonly string _accessKey; // MinIO Access Key
- private readonly string _secretKey; // MinIO Secret Key
- private readonly string _region; // S3 兼容 API 需要的区域,MinIO 通常用 "us-east-1"
- private readonly string _service; // S3 兼容 API 需要的服务名称,通常是 "s3"
- /// <summary>
- /// 构造函数,初始化 MinIO 操作器。
- /// </summary>
- /// <param name="minioEndpoint">MinIO 服务器的 URL,例如 "http://localhost:9000"</param>
- /// <param name="accessKey">Access Key,用于认证。</param>
- /// <param name="secretKey">Secret Key,用于认证。</param>
- /// <param name="region">S3 兼容 API 需要的区域,默认为 "us-east-1"。</param>
- /// <param name="service">S3 兼容 API 需要的服务名称,默认为 "s3"。</param>
- public MinioHttpOperator(string minioEndpoint, string accessKey, string secretKey, string region = "cn-north-1", string service = "s3")
- {
- // 移除末尾的斜杠,确保 URL 格式正确
- _minioEndpoint = minioEndpoint.TrimEnd('/');
- _accessKey = accessKey;
- _secretKey = secretKey;
- _region = region;
- _service = service;
- if (string.IsNullOrEmpty(_accessKey) || string.IsNullOrEmpty(_secretKey))
- {
- // 抛出异常而不是警告,因为没有凭据就无法认证
- throw new ArgumentNullException("AccessKey 和 SecretKey 不能为空,因为需要进行认证。");
- }
- }
- /// <summary>
- /// 上传文件到 MinIO。
- /// </summary>
- /// <param name="bucketName">目标桶的名称。</param>
- /// <param name="objectName">在桶中保存的对象名称(包含路径,例如 "myfolder/myfile.txt")。</param>
- /// <param name="filePath">本地待上传文件的完整路径。</param>
- /// <param name="contentType">文件的 MIME 类型,例如 "application/octet-stream"、"image/jpeg"、"text/plain"。</param>
- /// <returns>如果上传成功返回 true,否则返回 false。</returns>
- public bool UploadFile(string bucketName, string objectName, string filePath, string contentType = "application/octet-stream")
- {
- try
- {
- if (!File.Exists(filePath))
- {
- Console.WriteLine($"错误:文件未找到,路径:{filePath}");
- return false;
- }
- string url = $"{_minioEndpoint}/{bucketName}/{objectName}";
- HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
- request.Method = "PUT";
- request.ContentType = contentType;
- // 计算文件内容的 SHA256 哈希值
- string contentHash;
- using (FileStream fileStream = new FileStream(filePath, FileMode.Open, FileAccess.Read))
- {
- using (SHA256 sha256 = new SHA256Managed())
- {
- byte[] hashBytes = sha256.ComputeHash(fileStream);
- contentHash = BitConverter.ToString(hashBytes).Replace("-", "").ToLowerInvariant();
- }
- fileStream.Position = 0; // 重置流位置以便后续读取
- request.ContentLength = fileStream.Length; // 设置请求内容长度
- // 签名请求
- SignRequest(request, bucketName, objectName, contentHash);
- // 获取请求流并写入文件内容
- using (Stream requestStream = request.GetRequestStream())
- {
- byte[] buffer = new byte[4096]; // 4KB 缓冲区
- int bytesRead;
- while ((bytesRead = fileStream.Read(buffer, 0, buffer.Length)) > 0)
- {
- requestStream.Write(buffer, 0, bytesRead);
- }
- }
- }
- using (HttpWebResponse response = (HttpWebResponse)request.GetResponse())
- {
- if (response.StatusCode == HttpStatusCode.OK)
- {
- Console.WriteLine($"成功上传文件 {objectName} 到桶 {bucketName}。");
- return true;
- }
- else
- {
- Console.WriteLine($"上传文件 {objectName} 失败。状态码:{response.StatusCode}");
- return false;
- }
- }
- }
- catch (WebException webEx)
- {
- HandleWebException(webEx, "上传");
- return false;
- }
- catch (Exception ex)
- {
- Console.WriteLine($"上传时发生未知错误:{ex.Message}");
- return false;
- }
- }
- /// <summary>
- /// 从 MinIO 下载文件。
- /// </summary>
- /// <param name="bucketName">源桶的名称。</param>
- /// <param name="objectName">要下载的对象名称。</param>
- /// <param name="savePath">本地保存文件的完整路径。</param>
- /// <returns>如果下载成功返回 true,否则返回 false。</returns>
- public bool DownloadFile(string bucketName, string objectName, string savePath)
- {
- try
- {
- string url = $"{_minioEndpoint}/{bucketName}/{objectName}";
- HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
- request.Method = "GET";
- // 对于 GET 请求,payload hash 是固定的空字符串的 SHA256 哈希
- string contentHash = "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855"; // SHA256("")
- SignRequest(request, bucketName, objectName, contentHash);
- using (HttpWebResponse response = (HttpWebResponse)request.GetResponse())
- {
- if (response.StatusCode == HttpStatusCode.OK)
- {
- using (Stream responseStream = response.GetResponseStream())
- using (FileStream fileStream = new FileStream(savePath, FileMode.Create, FileAccess.Write))
- {
- byte[] buffer = new byte[4096];
- int bytesRead;
- while ((bytesRead = responseStream.Read(buffer, 0, buffer.Length)) > 0)
- {
- fileStream.Write(buffer, 0, bytesRead);
- }
- }
- Console.WriteLine($"成功下载文件 {objectName} 到 {savePath}。");
- return true;
- }
- else
- {
- Console.WriteLine($"下载文件 {objectName} 失败。状态码:{response.StatusCode}");
- return false;
- }
- }
- }
- catch (WebException webEx)
- {
- HandleWebException(webEx, "下载");
- return false;
- }
- catch (Exception ex)
- {
- Console.WriteLine($"下载时发生未知错误:{ex.Message}");
- return false;
- }
- }
- /// <summary>
- /// 从 MinIO 删除文件。
- /// </summary>
- /// <param name="bucketName">文件所在桶的名称。</param>
- /// <param name="objectName">要删除的对象名称。</param>
- /// <returns>如果删除成功返回 true,否则返回 false。</returns>
- public bool DeleteFile(string bucketName, string objectName)
- {
- try
- {
- string url = $"{_minioEndpoint}/{bucketName}/{objectName}";
- HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
- request.Method = "DELETE";
- // 对于 DELETE 请求,payload hash 是固定的空字符串的 SHA256 哈希
- string contentHash = "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855"; // SHA256("")
- SignRequest(request, bucketName, objectName, contentHash);
- using (HttpWebResponse response = (HttpWebResponse)request.GetResponse())
- {
- // 成功的 DELETE 请求通常返回 204 No Content
- if (response.StatusCode == HttpStatusCode.NoContent)
- {
- Console.WriteLine($"成功删除文件 {objectName} 从桶 {bucketName}。");
- return true;
- }
- else
- {
- Console.WriteLine($"删除文件 {objectName} 失败。状态码:{response.StatusCode}");
- return false;
- }
- }
- }
- catch (WebException webEx)
- {
- HandleWebException(webEx, "删除");
- return false;
- }
- catch (Exception ex)
- {
- Console.WriteLine($"删除时发生未知错误:{ex.Message}");
- return false;
- }
- }
- /// <summary>
- /// 处理 Web 请求异常并输出详细信息。
- /// </summary>
- /// <param name="webEx">WebException 实例。</param>
- /// <param name="operation">发生异常的操作名称(例如:"上传"、"下载")。</param>
- private void HandleWebException(WebException webEx, string operation)
- {
- if (webEx.Response != null)
- {
- using (StreamReader reader = new StreamReader(webEx.Response.GetResponseStream()))
- {
- string responseText = reader.ReadToEnd();
- Console.WriteLine($"{operation}时发生 Web 异常:{webEx.Message}。状态码:{(int)((HttpWebResponse)webEx.Response).StatusCode}。响应内容:{responseText}");
- }
- }
- else
- {
- Console.WriteLine($"{operation}时发生 Web 异常:{webEx.Message}");
- }
- }
- /// <summary>
- /// 为 HttpWebRequest 签名 AWS Signature Version 4 认证头部。
- /// 这是 AWS Signature Version 4 规范的简化实现,旨在与 MinIO 兼容。
- /// </summary>
- /// <param name="request">要签名的 HttpWebRequest 实例。</param>
- /// <param name="bucketName">桶名称。</param>
- /// <param name="objectName">对象名称。</param>
- /// <param name="contentHash">请求体的 SHA256 哈希值。</param>
- private void SignRequest(HttpWebRequest request, string bucketName, string objectName, string contentHash)
- {
- // --- 步骤 1: 创建 Canonical Request ---
- // 1.1 HTTP 方法
- string httpRequestMethod = request.Method;
- // 1.2 Canonical URI
- // 对象名必须进行 URI 编码,但斜杠 (/) 作为路径分隔符不能被编码。
- // Uri.EscapeDataString 会编码 '/' 为 '%2F',需要将其替换回来。
- // 确保 objectName 不以斜杠开头,因为 canonicalUri 会添加一个。
- string cleanedObjectName = objectName.StartsWith("/") ? objectName.Substring(1) : objectName;
- string encodedObjectName = Uri.EscapeDataString(cleanedObjectName).Replace("%2F", "/");
- string canonicalUri = $"/{bucketName}/{encodedObjectName}";
- // 1.3 Canonical Query String (本示例不处理查询参数,因此为空)
- string canonicalQueryString = "";
- // 1.4 Canonical Headers
- // 头部名称必须小写,并按字典序排序。
- // 头部值必须去除前导/尾随空格,多个空格替换为单个空格。
- // Host 头部必须包含端口(如果是非默认端口)。
- var headersToSign = new SortedList<string, string>();
- // Host 头部
- string hostHeaderValue = request.RequestUri.Host;
- if (!request.RequestUri.IsDefaultPort)
- {
- hostHeaderValue += ":" + request.RequestUri.Port;
- }
- headersToSign.Add("host", hostHeaderValue);
- // x-amz-content-sha256 头部
- headersToSign.Add("x-amz-content-sha256", contentHash);
- // x-amz-date 头部
- DateTime requestDateTime = DateTime.UtcNow;
- string amzDate = requestDateTime.ToString("yyyyMMddTHHmmssZ", CultureInfo.InvariantCulture);
- headersToSign.Add("x-amz-date", amzDate);
- // Content-Type 头部 (仅用于 PUT/POST 请求)
- if (request.Method == "PUT" || request.Method == "POST")
- {
- string actualContentType = request.ContentType;
- if (string.IsNullOrEmpty(actualContentType))
- {
- actualContentType = "application/octet-stream"; // 签名时使用的默认 Content-Type
- }
- headersToSign.Add("content-type", actualContentType);
- }
- // 构建 canonicalHeaders 字符串
- StringBuilder canonicalHeadersBuilder = new StringBuilder();
- foreach (var header in headersToSign)
- {
- canonicalHeadersBuilder.AppendFormat(CultureInfo.InvariantCulture, "{0}:{1}\n", header.Key, header.Value.Trim()); // trim header values
- }
- string canonicalHeaders = canonicalHeadersBuilder.ToString();
- // 1.5 Signed Headers
- // 包含在规范化头部中所有头部名称的列表,小写,按字典序排序,用分号分隔。
- string signedHeaders = string.Join(";", headersToSign.Keys.ToArray());
- // 1.6 Payload Hash (已在方法参数中提供)
- // 1.7 组合 Canonical Request
- string canonicalRequest = string.Format(CultureInfo.InvariantCulture,
- "{0}\n{1}\n{2}\n{3}\n{4}\n{5}",
- httpRequestMethod,
- canonicalUri,
- canonicalQueryString,
- canonicalHeaders, // 注意这里已经包含了末尾的换行符
- signedHeaders,
- contentHash);
- // --- 步骤 2: 创建 String to Sign ---
- // Algorithm
- string algorithm = "AWS4-HMAC-SHA256";
- // Credential Scope
- string dateStamp = requestDateTime.ToString("yyyyMMdd", CultureInfo.InvariantCulture);
- string credentialScope = string.Format(CultureInfo.InvariantCulture,
- "{0}/{1}/{2}/aws4_request",
- dateStamp,
- _region,
- _service);
- // Hash of Canonical Request
- string hashedCanonicalRequest = ToHex(Hash(Encoding.UTF8.GetBytes(canonicalRequest)));
- // 组合 String to Sign
- string stringToSign = string.Format(CultureInfo.InvariantCulture,
- "{0}\n{1}\n{2}\n{3}",
- algorithm,
- amzDate,
- credentialScope,
- hashedCanonicalRequest);
- // --- 步骤 3: 计算签名 ---
- // Signing Key 派生
- byte[] kSecret = Encoding.UTF8.GetBytes("AWS4" + _secretKey);
- byte[] kDate = HmacSha256(kSecret, dateStamp);
- byte[] kRegion = HmacSha256(kDate, _region);
- byte[] kService = HmacSha256(kRegion, _service);
- byte[] kSigning = HmacSha256(kService, "aws4_request");
- // 计算最终签名
- byte[] signatureBytes = HmacSha256(kSigning, stringToSign);
- string signature = ToHex(signatureBytes);
- // --- 步骤 4: 添加 Authorization 头部 ---
- string authorizationHeader = string.Format(CultureInfo.InvariantCulture,
- "{0} Credential={1}/{2}, SignedHeaders={3}, Signature={4}",
- algorithm,
- _accessKey,
- credentialScope,
- signedHeaders,
- signature);
- request.Headers["Authorization"] = authorizationHeader;
- // 设置 x-amz-date 头部(如果尚未设置)
- request.Headers["x-amz-date"] = amzDate;
- // 设置 x-amz-content-sha256 头部(如果尚未设置)
- request.Headers["x-amz-content-sha256"] = contentHash;
- }
- /// <summary>
- /// 计算字节数组的 SHA256 哈希值。
- /// </summary>
- private static byte[] Hash(byte[] bytes)
- {
- using (SHA256 sha256 = new SHA256Managed())
- {
- return sha256.ComputeHash(bytes);
- }
- }
- /// <summary>
- /// 计算 HMAC-SHA256 哈希值。
- /// </summary>
- private static byte[] HmacSha256(byte[] key, string data)
- {
- using (HMACSHA256 hmac = new HMACSHA256(key))
- {
- return hmac.ComputeHash(Encoding.UTF8.GetBytes(data));
- }
- }
- /// <summary>
- /// 将字节数组转换为十六进制字符串。
- /// </summary>
- private static string ToHex(byte[] bytes)
- {
- return BitConverter.ToString(bytes).Replace("-", "").ToLowerInvariant();
- }
- }
- }
复制代码 测试代码如下:- using System;
- using System.IO;
- using System.Threading;
- namespace MinioHttpOperatorDemo
- {
- class Program
- {
- static void Main(string[] args)
- { // 替换为您的 MinIO 实例的地址
- string minioEndpoint = "http://127.xxx.xxx.xxx:9000";
- // 如果您的 MinIO 实例需要认证,请在这里提供您的 AccessKey 和 SecretKey。
- // 例如:
- string accessKey = "accessKey ";
- string secretKey = "secretKey ";
- MinioHttpOperator minioOperator = new MinioHttpOperator(minioEndpoint, accessKey, secretKey);
- // 如果 MinIO 允许匿名访问,则无需提供 AccessKey 和 SecretKey
- //MinioHttpOperator minioOperator = new MinioHttpOperator(minioEndpoint);
- // 确保此桶在 MinIO 中存在或 MinIO 服务器允许自动创建桶。
- string bucketName = "bucketName ";
- string testFolder = "test";
- // --- 准备多个测试文件 ---
- string localFilePath1 = Path.Combine(Path.GetTempPath(), "testfile1.txt");
- string localFilePath2 = Path.Combine(Path.GetTempPath(), "testfile2.jpg"); // 模拟图片文件
- string minioObjectName1 = $"{testFolder}/document1.txt";
- string minioObjectName2 = $"{testFolder}/image.jpg";
- string content1 = "This is the content for document one.";
- byte[] content2 = new byte[1024]; // 模拟一个1KB的二进制数据作为图片内容
- new Random().NextBytes(content2); // 填充随机字节
- try
- {
- File.WriteAllText(localFilePath1, content1);
- File.WriteAllBytes(localFilePath2, content2);
- Console.WriteLine($"已在本地创建测试文件:{localFilePath1} 和 {localFilePath2}");
- }
- catch (Exception ex)
- {
- Console.WriteLine($"创建测试文件失败:{ex.Message}");
- Console.WriteLine("请检查文件路径和权限。程序将退出。");
- Console.ReadKey();
- return;
- }
- Console.WriteLine("\n--- 开始 MinIO 批量操作 ---");
- // --- 上传第一个文件 ---
- Console.WriteLine($"\n尝试上传文件:{localFilePath1} 到 {minioEndpoint}/{bucketName}/{minioObjectName1}...");
- if (minioOperator.UploadFile(bucketName, minioObjectName1, localFilePath1, "text/plain"))
- {
- Console.WriteLine("文件上传成功。");
- }
- else
- {
- Console.WriteLine("文件上传失败。");
- }
- Thread.Sleep(1000); // 稍作等待
- // --- 上传第二个文件 ---
- Console.WriteLine($"\n尝试上传文件:{localFilePath2} 到 {minioEndpoint}/{bucketName}/{minioObjectName2}...");
- if (minioOperator.UploadFile(bucketName, minioObjectName2, localFilePath2, "image/jpeg"))
- {
- Console.WriteLine("文件上传成功。");
- }
- else
- {
- Console.WriteLine("文件上传失败。");
- }
- Thread.Sleep(1000); // 稍作等待
- Console.WriteLine("\n----------------------------------------");
- // --- 下载第一个文件 ---
- string downloadSavePath1 = Path.Combine(Path.GetTempPath(), "downloaded_document1.txt");
- Console.WriteLine($"\n尝试从 {minioEndpoint}/{bucketName}/{minioObjectName1} 下载文件到 {downloadSavePath1}...");
- if (minioOperator.DownloadFile(bucketName, minioObjectName1, downloadSavePath1))
- {
- Console.WriteLine("文件下载成功。");
- try
- {
- Console.WriteLine($"下载文件的内容:{File.ReadAllText(downloadSavePath1)}");
- }
- catch (Exception ex)
- {
- Console.WriteLine($"读取下载文件内容失败:{ex.Message}");
- }
- }
- else
- {
- Console.WriteLine("文件下载失败。");
- }
- Thread.Sleep(1000); // 稍作等待
- // --- 尝试下载一个不存在的文件 ---
- string nonExistentObject = $"{testFolder}/nonexistent.pdf";
- string downloadNonExistentPath = Path.Combine(Path.GetTempPath(), "nonexistent.pdf");
- Console.WriteLine($"\n尝试下载不存在的文件:{nonExistentObject}...");
- if (!minioOperator.DownloadFile(bucketName, nonExistentObject, downloadNonExistentPath))
- {
- Console.WriteLine("下载不存在的文件失败(预期结果)。");
- }
- Thread.Sleep(1000); // 稍作等待
- Console.WriteLine("\n----------------------------------------");
- // --- 删除第一个文件 ---
- Console.WriteLine($"\n尝试从 {minioEndpoint}/{bucketName} 删除文件 {minioObjectName1}...");
- if (minioOperator.DeleteFile(bucketName, minioObjectName1))
- {
- Console.WriteLine("文件删除成功。");
- }
- else
- {
- Console.WriteLine("文件删除失败。");
- }
- Thread.Sleep(1000); // 稍作等待
- // --- 删除第二个文件 ---
- Console.WriteLine($"\n尝试从 {minioEndpoint}/{bucketName} 删除文件 {minioObjectName2}...");
- if (minioOperator.DeleteFile(bucketName, minioObjectName2))
- {
- Console.WriteLine("文件删除成功。");
- }
- else
- {
- Console.WriteLine("文件删除失败。");
- }
- Console.WriteLine("\n--- MinIO 批量操作结束 ---");
- // 清理本地创建的测试文件
- try
- {
- if (File.Exists(localFilePath1))
- {
- File.Delete(localFilePath1);
- Console.WriteLine($"已清理本地测试文件:{localFilePath1}");
- }
- if (File.Exists(localFilePath2))
- {
- File.Delete(localFilePath2);
- Console.WriteLine($"已清理本地测试文件:{localFilePath2}");
- }
- if (File.Exists(downloadSavePath1))
- {
- File.Delete(downloadSavePath1);
- Console.WriteLine($"已清理本地下载文件:{downloadSavePath1}");
- }
- if (File.Exists(downloadNonExistentPath))
- {
- File.Delete(downloadNonExistentPath);
- Console.WriteLine($"已清理本地下载文件:{downloadNonExistentPath}");
- }
- }
- catch (Exception ex)
- {
- Console.WriteLine($"清理本地文件失败:{ex.Message}");
- }
- Console.WriteLine("\n按任意键退出程序。");
- Console.ReadKey();
- }
- }
- }
复制代码 来源:程序园用户自行投稿发布,如果侵权,请联系站长删除
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