public static Stream Download(string cloudName)
{
try
{
Debug.WriteLine(string.Format("/----- start download:{0} from cloud-----/", cloudName));
GetObjectRequest req = new GetObjectRequest(bucket, cloudName);
OssObject obj = ossClient.GetObject(req);
Stream result = null;
if (obj != null)
{
result = obj.Content;
}
return result;
}
catch (Exception ex)
{
MessageBox.Show(string.Format("还原失败:{0}", ex.Message));
}
return null;
}
public void _DownLoadFile(object value)
{
OssObject ossobject = null;
GetObjectRequest request = null;
ObjectMetadata metadata;
FileStream fs = null;
int readline = 0; //当前读取的字节长度
long countlength = 0; //已经读取的字节
byte[] buffer = new byte[length]; //文件块
string bucket = "", fileKey = "", targetPath = "";
if (value is string[])
{
bucket = ((string[])value)[0];
fileKey = ((string[])value)[1];
targetPath = ((string[])value)[2];
}
else
{
return;
}
if (File.Exists(targetPath))
{
try
{
File.Delete(targetPath);
}
catch (IOException ioEx) //文件正在使用中，不能删除。
{
return;
}
}
fs = new FileStream(targetPath, FileMode.Create);
try
{
request = new Aliyun.OpenServices.OpenStorageService.GetObjectRequest(bucket, fileKey);
ossobject = client.GetObject(request);//获取文件流
//获取需要下载文件的信息。
metadata = client.GetObjectMetadata(bucket, fileKey);
while ((readline = ossobject.Content.Read(buffer, 0, length)) > 0)
{
fs.Write(buffer, 0, readline);
countlength += readline;
if (DownLoadProcessing != null)
{
DownLoadProcessing(Convert.ToDouble(countlength) / Convert.ToDouble(metadata.ContentLength));
}
}
}
catch (Aliyun.OpenServices.ServiceException serviceEx) //下载过程中出现错误。
{
}
finally
{
ossobject.Dispose();
fs.Close();
}
}
public ActionResult GetFile(int id, int width = 0, int height = 0)
{
int bfid = id;
BLLBFInfo bllbfinfo = new BLLBFInfo();
var bfinfo = bllbfinfo.Find(bfid);
if (bfinfo == null)
{
return Content("不存在的数据");
}
else
{
bfinfo.LastViewDateTime = DateTime.Now;
bfinfo.GetCount++;
bllbfinfo.UpDate(bfinfo);
//返回一个二进制流！根据类型，来判断，需要返回的内容！
MemoryStream ms = new MemoryStream();
OssClient oc = new OssClient(AccessKeyID, AccessKeySecret);
GetObjectRequest getObjectRequest = new GetObjectRequest(BucketName, bfinfo.OSSFileName);
oc.GetObject(getObjectRequest, ms);
if (bfinfo.MineType.Contains("image"))
{
if (width == 0 && height == 0)
{
return File(ms.ToArray(), bfinfo.MineType);
}
else
{
Image image = System.Drawing.Image.FromStream(ms);
return File(GetThumbnail(image, width, height).ToArray(), bfinfo.MineType);
}
}
else
{
return File(ms.ToArray(), bfinfo.MineType);
}
}
}
public ObjectMetadata GetObject(AliyunDownloadRequst downloadRequst)
{
ObjectMetadata ret = null;
using (FileStream fs = new FileStream(downloadRequst.file, FileMode.Create))
{
long totalBytes = GetObjectSize(downloadRequst.bucketName, downloadRequst.key);
AliyunStream stream = new AliyunStream(fs);
stream.WritePositionChangeEvent += delegate(long nowPosition, long _totalBytes)
{
downloadRequst.TransferFile(nowPosition, totalBytes);
};
GetObjectRequest getObjectRequest = new GetObjectRequest(downloadRequst.bucketName, downloadRequst.key);
ret = _ossClient.GetObject(getObjectRequest, stream);
}
return ret;
}