文件上传到阿里云

/// <summary> ???????/// 文件上传 ???????/// </summary> ???????/// <param name="file"></param> ???????/// <param name="fileName"></param> ???????/// <returns></returns> ???????public string FileSaveAliyunOSS(HttpPostedFileBase file, string fileName) ???????{ ???????????string FilePath = ""; ???????????//上传到阿里云 ?????????????using (Stream fileStream = file.InputStream)//转成Stream流 ?????????????{ ???????????????string md5 = OssUtils.ComputeContentMd5(fileStream, file.ContentLength); ???????????????//string today = DateTime.Now.ToString("yyyyMMdd"); ???????????????string extension = System.IO.Path.GetExtension(file.FileName);//扩展名 ????????????????string FileName = Convert.ToString(Guid.NewGuid()).Replace("-", "") + extension;//文件名=文件名+当前上传时间 ?????????????????FilePath = fileName + "/" + Convert.ToString(DateTime.Now.Year) + "/" + Convert.ToString(DateTime.Now.Month) + "/" + FileName;//云文件保存路径 ?????????????????????????????????try ???????????????{ ???????????????????//初始化阿里云配置--外网Endpoint、访问ID、访问password ?????????????????????OssClient aliyun = new OssClient(endpoint, accessKeyId, accessKeySecret); ???????????????????//将文件md5值赋值给meat头信息，服务器验证文件MD5 ?????????????????????var objectMeta = new ObjectMetadata ???????????????????{ ???????????????????????ContentMd5 = md5, ???????????????????????ContentType = "application/octet-stream", ???????????????????}; ???????????????????//文件上传--空间名、文件保存路径、文件流、meta头信息(文件md5) //返回meta头信息(文件md5) ?????????????????????PutObjectResult por = aliyun.PutObject(BucketName, FilePath, fileStream, objectMeta); ???????????????????string text = por.ETag; ???????????????????if (extension.ToUpper() == ".JPG") ???????????????????{ ???????????????????????FilePath += "-big"; ???????????????????} ???????????????} ???????????????catch (Exception e) ???????????????{ ???????????????????ICE.Core.LogHelper.ErrorLog(log, string.Format("图片上传OSS出错了：{0}", Convert.ToString(e.Message))); ???????????????????FilePath = ""; ???????????????} ???????????} ???????????return FilePath; ???????}