using Aliyun.OSS; using Aliyun.OSS.Common; using System; using System.Collections.Generic; using System.IO; using System.Linq; using System.Text; using System.Threading.Tasks; using System.Web; using System.Web.UI.WebControls; namespace QuickEAS.CoreLib.Aliyun { /// <summary>阿里云储存帮助类</summary> public class LibAliyunHelper { const string accessKeyId = "<your access key id>"; const string accessKeySecret = "<your access key secret>"; const string endpoint = "<valid host name>"; #region 上传部分 /// <summary> /// 简单上传文件 /// </summary> /// <param name="file">上传控件</param> /// <param name="key">文件标识</param> /// <param name="bucketName">空间名</param> public static string AliyunUploadFile(FileUpload file, string key, string bucketName) { try { Stream sr = file.PostedFile.InputStream; var client = new OssClient(endpoint, accessKeyId, accessKeySecret); var result = client.PutObject(bucketName, key, sr); return "succeeded"; } catch (OssException ex) { return "上传失败:" + ex.ErrorCode; } catch (System.Exception ex) { return ex.Message; } } /// <summary> /// 简单上传文件 /// </summary> /// <param name="file">上传控件</param> /// <param name="key">文件标识</param> /// <param name="bucketName">空间名</param> public static string AliyunUploadFile(HttpPostedFile file, string key, string bucketName) { try { Stream sr = file.InputStream; var client = new OssClient(endpoint, accessKeyId, accessKeySecret); var result = client.PutObject(bucketName, key, sr); return "succeeded"; } catch (OssException ex) { return "上传失败:" + ex.ErrorCode; } catch (System.Exception ex) { return ex.Message; } } /// <summary> /// 分片上传 /// </summary> /// <param name="bucketName">空间名</param> /// <param name="key">唯一标识</param> /// <param name="file">上传控件</param> /// <param name="partSize">每片大小(默认5MB)</param> /// <returns></returns> public static string AliyunUploadPart(string bucketName, string key, FileUpload file, int partSize = 5 * 1024 * 1024) { try { Stream sr = file.PostedFile.InputStream; OssClient client = new OssClient(endpoint, accessKeyId, accessKeySecret); client.PutBigObject(bucketName, key, sr, null, partSize); return "succeeded"; } catch (OssException ex) { return "上传失败:" + ex.ErrorCode; } catch (System.Exception ex) { return "上传失败:" + ex.Message; } } /// <summary> /// 分片上传 /// </summary> /// <param name="bucketName">空间名</param> /// <param name="objectName">key</param> /// <param name="fileToUpload">指定分片上传文件路径</param> /// <param name="partSize">分片大小(单位:字节)</param> public static void UploadMultipart(String bucketName, String key, FileUpload file, int partSize = 5 * 1024 * 1024) { var uploadId = InitiateMultipartUpload(bucketName, key); var partETags = UploadParts(bucketName, key, file, uploadId, partSize); var completeResult = CompleteUploadPart(bucketName, key, uploadId, partETags); //Console.WriteLine(@"Upload multipart result : " + completeResult.Location); } private static string InitiateMultipartUpload(String bucketName, String objectName) { var request = new InitiateMultipartUploadRequest(bucketName, objectName); OssClient client = new OssClient(endpoint, accessKeyId, accessKeySecret); var result = client.InitiateMultipartUpload(request); return result.UploadId; } private static List<PartETag> UploadParts(String bucketName, String objectName, FileUpload file, String uploadId, int partSize) { var fileSize = file.PostedFile.ContentLength; var partCount = fileSize / partSize; if (fileSize % partSize != 0) { partCount++; } var partETags = new List<PartETag>(); using (var sr = file.PostedFile.InputStream) { for (var i = 0; i < partCount; i++) { var skipBytes = (long)partSize * i; sr.Seek(skipBytes, 0); var size = (partSize < fileSize - skipBytes) ? partSize : (fileSize - skipBytes); var request = new UploadPartRequest(bucketName, objectName, uploadId) { InputStream = sr, PartSize = size, PartNumber = i + 1 }; OssClient client = new OssClient(endpoint, accessKeyId, accessKeySecret); var result = client.UploadPart(request); partETags.Add(result.PartETag); } } return partETags; } private static CompleteMultipartUploadResult CompleteUploadPart(String bucketName, String objectName, String uploadId, List<PartETag> partETags) { var completeMultipartUploadRequest = new CompleteMultipartUploadRequest(bucketName, objectName, uploadId); foreach (var partETag in partETags) { completeMultipartUploadRequest.PartETags.Add(partETag); } OssClient client = new OssClient(endpoint, accessKeyId, accessKeySecret); return client.CompleteMultipartUpload(completeMultipartUploadRequest); } #endregion #region URL访问 /// <summary> /// URL获取 /// </summary> /// <param name="bucketName"></param> /// <param name="key"></param> /// <returns></returns> public static string GetUrlGet(string bucketName, string key) { var req = new GeneratePresignedUriRequest(bucketName, key, SignHttpMethod.Get) { Expiration = new DateTime().AddHours(1) }; var client = new OssClient(endpoint, accessKeyId, accessKeySecret); var uri = client.GeneratePresignedUri(req); return uri.ToString(); } /// <summary> /// URL获取 /// </summary> /// <param name="bucketName"></param> /// <param name="key"></param> /// <param name="timeMinutes">过期时间(分)</param> /// <returns></returns> public static string GetUrlGet(string bucketName, string key, int timeMinutes) { var req = new GeneratePresignedUriRequest(bucketName, key, SignHttpMethod.Get) { Expiration = new DateTime().AddMinutes(timeMinutes) }; var client = new OssClient(endpoint, accessKeyId, accessKeySecret); var uri = client.GeneratePresignedUri(req); return uri.ToString(); } #endregion #region 文件下载 /// <summary> /// 从指定的OSS存储空间中获取指定的文件 /// </summary> /// <param name="bucketName">要获取的文件所在的存储空间的名称</param> /// <param name="key">要获取的文件的名称</param> /// <param name="fileToDownload">文件保存的本地路径</param> public static string GetObject(string bucketName, string key, string fileToDownload) { try { // 初始化OssClient var client = new OssClient(endpoint, accessKeyId, accessKeySecret); var obj = client.GetObject(bucketName, key); using (var requestStream = obj.Content) { byte[] buf = new byte[1024]; var fs = File.Open(fileToDownload, FileMode.OpenOrCreate); var len = 0; while ((len = requestStream.Read(buf, 0, 1024)) != 0) { fs.Write(buf, 0, len); } fs.Close(); } return "succeeded"; } catch (System.Exception ex) { return ex.Message; } } #endregion } }
【代码片段】阿里云储存帮助类
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转载自blog.csdn.net/michelsn/article/details/80304731
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