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using System;
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using System.IO;
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using Aliyun.OSS;
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namespace BP.Tools
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{
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public static class OSSUtil
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{
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/// <summary>
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/// 检查OSS服务的配置是否完整
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/// </summary>
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/// <exception cref="Exception"></exception>
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private static void CheckOSSConfig()
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{
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if (BP.DA.DataType.IsNullOrEmpty(BP.Difference.SystemConfig.OSSEndpoint))
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throw new Exception("err@检测到没有配置OSSEndpoint，请您配置OSSEndpoint后重新上传文件");
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if (BP.DA.DataType.IsNullOrEmpty(BP.Difference.SystemConfig.OSSAccessKeyId))
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throw new Exception("err@检测到没有配置OSSAccessKeyId，请您配置OSSAccessKeyId后重新上传文件");
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if (BP.DA.DataType.IsNullOrEmpty(BP.Difference.SystemConfig.OSSAccessKeySecret))
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throw new Exception("err@检测到没有配置OSSAccessKeySecret，请您配置OSSAccessKeySecret后重新上传文件");
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if (BP.DA.DataType.IsNullOrEmpty(BP.Difference.SystemConfig.OSSBucketName))
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throw new Exception("err@检测到没有配置OSSBucketName，请您配置OSSBucketName后重新上传文件");
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}
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/// <summary>
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/// OSS上传文件
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/// </summary>
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/// <param name="objectName">Object完整路径</param>
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/// <param name="temp">保存的临时文件路径</param>
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/// <exception cref="Exception"></exception>
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public static void doUpload(string objectName, string temp)
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{
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//检查配置
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CheckOSSConfig();
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// 创建OssClient实例。
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var client = new OssClient(BP.Difference.SystemConfig.OSSEndpoint,
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BP.Difference.SystemConfig.OSSAccessKeyId, BP.Difference.SystemConfig.OSSAccessKeySecret);
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if (objectName.StartsWith("/"))
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objectName = objectName.Substring(1);
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try
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{
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// 上传文件。
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client.PutObject(BP.Difference.SystemConfig.OSSBucketName, objectName, temp);
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}
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catch (Exception ex)
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{
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throw new Exception("err@ 上传失败, 错误提示信息：" + ex.Message);
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}
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}
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/// <summary>
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/// OSS下载文件
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/// </summary>
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/// <param name="fileFullNamem">文件全路径名</param>
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/// <param name="tempFile">临时文件路径</param>
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/// <exception cref="Exception"></exception>
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public static void doDownload(string fileFullNamem, string tempFile)
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{
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//检查配置
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CheckOSSConfig();
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// 创建OssClient实例。
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var client = new OssClient(BP.Difference.SystemConfig.OSSEndpoint,
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BP.Difference.SystemConfig.OSSAccessKeyId, BP.Difference.SystemConfig.OSSAccessKeySecret);
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try
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{
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string subDir = "";
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//判断是否有子目录路径
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if (BP.DA.DataType.IsNullOrEmpty(BP.Difference.SystemConfig.BucketSubPath) == false && "/".Equals(BP.Difference.SystemConfig.BucketSubPath) == false)
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{
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subDir = BP.Difference.SystemConfig.BucketSubPath + "/";
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}
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//转换路径
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fileFullNamem = subDir + fileFullNamem.Replace("//", "/");
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if (fileFullNamem.StartsWith("/"))
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fileFullNamem = fileFullNamem.Substring(1);
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// 下载文件到流。OssObject包含了文件的各种信息，如文件所在的存储空间、文件名、元信息以及一个输入流。
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var obj = client.GetObject(BP.Difference.SystemConfig.OSSBucketName, fileFullNamem);
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using (var requestStream = obj.Content)
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{
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byte[] buf = new byte[1024];
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var fs = File.Open(tempFile, FileMode.OpenOrCreate);
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var len = 0;
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// 通过输入流将文件的内容读取到文件或者内存中。
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while ((len = requestStream.Read(buf, 0, 1024)) != 0)
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{
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fs.Write(buf, 0, len);
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}
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fs.Close();
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}
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}
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catch (Exception ex)
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{
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throw new Exception("err@下载失败.错误提示信息： " + ex.Message);
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}
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}
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}
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} |