public override void Download()
{
if (Downloading)
{
throw new Exception("Can't download, since the previous download is not complete.");
}
DoneSize = 0;
Success = false;
IsCancelled = false;
Error = null;
Downloading = true;
SliceFileName = null;
SliceList = null;
bigfile = null;
try
{
SliceFileName = "download-" + from.md5 + ".slice";
SliceFileName = Path.Combine(Path.Combine(WorkFolder, pcs.getUID()), SliceFileName);
StateFileNameDecideEventArgs args = new StateFileNameDecideEventArgs()
{
SliceFileName = SliceFileName
};
fireStateFileNameDecide(args);
SliceFileName = args.SliceFileName;
CreateOrRestoreSliceList(); // 创建或还原分片列表
CreateDirectory(to); //创建目录
CreateLocalFile(); // 如果需要则创建本地文件
bigfile = new BigFileHelper(to, from.size); //映射文件到内存
foreach (Slice slice in SliceList)
{
if (slice.status != SliceStatus.Successed)
{
slice.status = SliceStatus.Pending; //重新下载未成功的分片
slice.doneSize = 0;
}
else
{
DoneSize += slice.doneSize;
}
}
DownloadSliceList(); // 启动线程来下载分片
Wait(); // 等待所有线程退出
CheckResult(); // 检查下载结果
}
catch (Exception ex)
{
Success = false;
IsCancelled = false;
Error = ex;
}
if (bigfile != null)
{
bigfile.Dispose();
bigfile = null;
}
if (Success)
{
SliceHelper.DeleteSliceFile(SliceFileName);
}
Downloading = false;
fireCompleted(new CompletedEventArgs(Success, IsCancelled, Error));
}
public override void Download()
{
if (Downloading)
throw new Exception("Can't download, since the previous download is not complete.");
DoneSize = 0;
Success = false;
IsCancelled = false;
Error = null;
Downloading = true;
SliceFileName = null;
SliceList = null;
bigfile = null;
try
{
SliceFileName = "download-" + from.md5 + ".slice";
SliceFileName = Path.Combine(Path.Combine(WorkFolder, pcs.getUID()), SliceFileName);
StateFileNameDecideEventArgs args = new StateFileNameDecideEventArgs()
{
SliceFileName = SliceFileName
};
fireStateFileNameDecide(args);
SliceFileName = args.SliceFileName;
CreateOrRestoreSliceList(); // 创建或还原分片列表
CreateLocalFile(); // 如果需要则创建本地文件
bigfile = new BigFileHelper(to); //映射文件到内存
foreach (Slice slice in SliceList)
{
if (slice.status != SliceStatus.Successed)
{
slice.status = SliceStatus.Pending; //重新下载未成功的分片
slice.doneSize = 0;
}
else
{
DoneSize += slice.doneSize;
}
}
DownloadSliceList(); // 启动线程来下载分片
Wait(); // 等待所有线程退出
CheckResult(); // 检查下载结果
}
catch (Exception ex)
{
Success = false;
IsCancelled = false;
Error = ex;
}
if (bigfile != null)
{
bigfile.Dispose();
bigfile = null;
}
if (Success)
SliceHelper.DeleteSliceFile(SliceFileName);
Downloading = false;
fireCompleted(new CompletedEventArgs(Success, IsCancelled, Error));
}
