/// <summary>
/// 删除指定的文件
/// </summary>
/// <param name="key">待删除的文件名称</param>
/// <param name="bucketName">文件所在存储空间的名称</param>
/// <param name="config">OSS地址的配置信息</param>
public static void DeleteObject(string key, string bucketName = "", OssConfig config = null)
{
if (bucketName == "")
{
bucketName = _bucketName;
}
OssClientProvider.GetOssClient(config).DeleteObject(bucketName, key);
}
/// <summary>
/// 由用户指定的OSS访问地址、阿里云颁发的AccessKeyId/AccessKeySecret构造一个新的OssClient实例。
/// </summary>
/// <param name="config"></param>
/// <returns></returns>
public static OssClient GetOssClient(OssConfig config = null)
{
if (config == null)
{
config = _OssConfig;
}
return(new OssClient(config.EndPoint, config.AccessKeyId, config.AccessKeySecret));
}
/// <summary>
/// 获取Referer白名单，可以设置referer，用于防盗链
/// </summary>
/// <param name="bucketName"></param>
/// <param name="config"></param>
/// <returns></returns>
public static string[] GetBucketReferer(string bucketName = "", OssConfig config = null)
{
if (bucketName == "")
{
bucketName = _bucketName;
}
var client = OssClientProvider.GetOssClient(config);
var rc = client.GetBucketReferer(bucketName);
return(rc.RefererList.Referers);
}
/// <summary>
/// 异步上传指定的文件到指定的OSS的存储空间
/// </summary>
/// <param name="key">文件的在OSS上保存的名称</param>
/// <param name="content">文件流</param>
/// <param name="bucketName">指定的存储空间名称</param>
/// <param name="config">OSS地址的配置信息</param>
/// <returns></returns>
public static string AsyncPutObject(string key, Stream content, string bucketName = "", OssConfig config = null)
{
if (bucketName == "")
{
bucketName = _bucketName;
}
key = _preFolder + key;
OssClientProvider.GetOssClient(config).BeginPutObject(bucketName, key, content, null, new object());
return(key);
}
/// <summary>
/// 上传指定的文件到指定的OSS的存储空间并且带MD5校验
/// </summary>
/// <param name="key">文件的在OSS上保存的名称</param>
/// <param name="content">文件流</param>
/// <param name="bucketName">指定的存储空间名称</param>
/// <param name="config">OSS地址的配置信息</param>
/// <returns></returns>
public static string PutObjectMD5(string key, Stream content, string bucketName = "", OssConfig config = null)
{
if (bucketName == "")
{
bucketName = _bucketName;
}
var md5 = OssUtils.ComputeContentMd5(content, content.Length);
key = _preFolder + key;
OssClientProvider.GetOssClient(config).PutObject(bucketName, key, content, new ObjectMetadata()
{
ContentMd5 = md5
});
return(key);
}
/// <summary>
/// 从指定的OSS存储空间中获取指定的文件
/// </summary>
/// <param name="key">文件的在OSS上保存的名称</param>
/// <param name="fileToDownload">本地存储下载文件的目录</param>
/// <param name="bucketName">指定的存储空间名称</param>
/// <param name="config">OSS地址的配置信息</param>
public static void GetObject(string key, string fileToDownload, string bucketName = "", OssConfig config = null)
{
if (bucketName == "")
{
bucketName = _bucketName;
}
var obj = OssClientProvider.GetOssClient(config).GetObject(bucketName, key);
using (var requestStream = obj.Content)
{
var buf = new byte[1024];
using (var fs = File.Open(fileToDownload, FileMode.OpenOrCreate))
{
var len = 0;
while ((len = requestStream.Read(buf, 0, 1024)) != 0)
{
fs.Write(buf, 0, len);
}
}
}
}
/// <summary>
/// 分片上传
/// </summary>
/// <param name="key"></param>
/// <param name="content"></param>
/// <param name="bucketName"></param>
/// <param name="config"></param>
/// <returns></returns>
public static string UploadMultipart(string key, Stream content, string bucketName = "", OssConfig config = null)
{
if (bucketName == "")
{
bucketName = _bucketName;
}
key = _preFolder + key;
var client = OssClientProvider.GetOssClient(config);
//初始化Multipart Upload
var request = new InitiateMultipartUploadRequest(bucketName, key); //指定上传文件的名字和所属存储空间
var result = client.InitiateMultipartUpload(request); //返回结果中含有UploadId ，它是区分分片上传事件的唯一标识
//Upload Part本地上传
var fileSize = content.Length;
var partCount = fileSize / partSize;
if (fileSize % partSize != 0)
{
partCount++;
}
var partETags = new List <PartETag>();
for (var i = 0; i < partCount; i++)
{
var skipBytes = (long)partSize * i;
content.Seek(skipBytes, 0);
var size = (partSize < fileSize - skipBytes) ? partSize : fileSize - partSize;//每片上传的文件大小，最后一片大小处理
var partRequest = new UploadPartRequest(bucketName, key, result.UploadId)
{
InputStream = content, PartSize = size, PartNumber = i + 1
};
var partResult = client.UploadPart(partRequest);
partETags.Add(partResult.PartETag);
}
//完成分片上传：OSS收到用户提交的Part列表后，会逐一验证每个数据Part的有效性，当所有的数据Part验证通过后，OSS会将这些part组合成一个完整的文件
var completeMultipartUploadRequest =
new CompleteMultipartUploadRequest(bucketName, key, result.UploadId);
foreach (var partETag in partETags)
{
completeMultipartUploadRequest.PartETags.Add(partETag);
}
client.CompleteMultipartUpload(completeMultipartUploadRequest);
return(key);
}
