public async Task <IActionResult> BreakpointDownload(string name)
{
//先获取文件大小
var newName = Guid.NewGuid() + "-" + name;
long fileLength = AliyunOSSHepler.GetInstance().GetFileLength(name);
string mimeType = MimeHelper.GetMimeMapping(name);
int partSize = 1024 * 1024 * 10;
var partCount = AliyunOSSHepler.GetInstance().CalPartCount(fileLength, partSize);
for (var i = 0; i < partCount; i++)
{
var startPos = partSize * i;
var endPos = partSize * i + (partSize < (fileLength - startPos) ? partSize : (fileLength - startPos)) - 1;
AliyunOSSHepler.GetInstance().Download(downloadPath, startPos, endPos, name, newName);
}
var file = new byte[fileLength];
using (var fileStream = new FileStream(downloadPath + newName, FileMode.Open))
{
fileStream.Read(file, 0, file.Length);
}
System.IO.File.Delete(downloadPath + newName);
return(File(file, mimeType, name));
}
public async Task <ResultContract <byte[]> > GetBreakpoint(string name, long startPos, long endPos)
{
var result = new ResultContract <byte[]>()
{
Code = 0, Msg = "获取成功"
};
//先获取文件大小
try
{
var newName = Guid.NewGuid() + "-" + name;
long fileLength = AliyunOSSHepler.GetInstance().GetFileLength(name);
string mimeType = MimeHelper.GetMimeMapping(name);
AliyunOSSHepler.GetInstance().Download(downloadPath, startPos, endPos, name, newName);
var file = new byte[endPos - startPos];
using (var fileStream = new FileStream(downloadPath + newName, FileMode.Open))
{
fileStream.Read(file, 0, file.Length);
}
System.IO.File.Delete(downloadPath + newName);
result.Data = file;
}
catch (Exception e)
{
result.Msg = "获取失败";
result.Code = -1;
}
return(result);
}
public async Task <IActionResult> DownloadImg(string imgurl)
{
string filename = Path.GetFileName(imgurl);
string mimeType = MimeHelper.GetMimeMapping(imgurl);
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(imgurl);
HttpWebResponse response = request.GetResponse() as HttpWebResponse;
Stream responseStream = response.GetResponseStream();
return(File(responseStream, mimeType, filename));
}