internal static void DownloadRestart(DownloadWrapper download)
{
var temp_dl_path = download.DownloadInfo.DownloadFullPath + ".dl";
File.Delete(temp_dl_path);
download.Status = DownloadTaskStatus.Paused;
DownloadStart(download);
}
public static bool CheckIfContained(DownloadWrapper download)
{
//check
if (DownloadList.FirstOrDefault(x => x.DownloadInfo.CheckIfSame(download.DownloadInfo) && download.DownloadInfo.DownloadId < 0 && (x.DownloadInfo.DownloadId != download.DownloadInfo.DownloadId)) is DownloadWrapper _)
{
return(true);
}
return(false);
}
private void Populate(IEnumerable <Patch> patches)
{
var enumerable = patches as IList <Patch> ?? patches.ToList();
foreach (var patch in enumerable.Where(p => p.FileDownloadInfo.FileInfoType != FileInfoType.Directory))
{
var downloadWrapper = new DownloadWrapper(patch, _patcherContext);
_downloadWrappers.Add(downloadWrapper.Patch.FileDownloadInfo.FileName, downloadWrapper);
foreach (var filePartInfo in patch.FileDownloadInfo.FileParts)
{
_fileParts.Enqueue(filePartInfo);
}
}
}
public static void DownloadPause(DownloadWrapper download)
{
if (download.Status == DownloadTaskStatus.Paused || download.Status == DownloadTaskStatus.Finished)
{
Log.Info($"Download task {download.DownloadInfo.FileName} has already been paused/finished.");
return;
}
download.Status = DownloadTaskStatus.Paused;
download.CancelTokenSource?.Cancel();
if (FileStreamHolder.TryGetValue(download, out var stream))
{
stream.Dispose();
}
Log.Info($"Paused downloading task :{download.DownloadInfo.FileName}");
}
internal static void DownloadDelete(DownloadWrapper download)
{
DownloadPause(download);
var temp_dl_path = download.DownloadInfo.DownloadFullPath + ".dl";
File.Delete(temp_dl_path);
DownloadList.Remove(download);
var db = LocalDBContext.Instance;
if (download.IsSaveInDB && db.Downloads.Remove(download.DownloadInfo) is Download)
{
Log.Info("Deleted entity record in DB");
db.SaveChanges();
}
Log.Info($"Deleted download task :{download.DownloadInfo.FileName}");
}
public static void DownloadStart(DownloadWrapper download)
{
if (download.Status == DownloadTaskStatus.Started || download.Status == DownloadTaskStatus.Finished)
{
Log.Info($"Download task {download.DownloadInfo.FileName} has already been started/finished.");
return;
}
//check
if (string.IsNullOrWhiteSpace(download.DownloadInfo.DownloadFullPath))
{
var message = "此任务出现格式错误，没钦定下载路径";
download.ErrorMessage = message;
DownloadPause(download);
throw new Exception(message);
}
if (!DownloadList.Contains(download))
{
DownloadList.Add(download);
}
download.ErrorMessage = string.Empty;
var cancel_token_source = new CancellationTokenSource();
download.CancelTokenSource = cancel_token_source;
var task = Task.Run(() => OnDownloadTaskStart(download), cancel_token_source.Token);
download.Status = DownloadTaskStatus.Started;
lock (RunningDownloadTask)
{
RunningDownloadTask.Add(download);
}
Log.Info($"Started downloading task :{download.DownloadInfo.FileName}");
}
private static void OnDownloadTaskStart(DownloadWrapper download)
{
FileStream file_stream = null;
try
{
var temp_dl_path = download.DownloadInfo.DownloadFullPath + ".dl";
Directory.CreateDirectory(Path.GetDirectoryName(download.DownloadInfo.DownloadFullPath));
file_stream = FileStreamHolder[download] = File.OpenWrite(temp_dl_path);
download.CurrentDownloadedLength = file_stream.Length;
file_stream.Seek(download.CurrentDownloadedLength, SeekOrigin.Begin);
WebResponse response = null;
try
{
response = RequestHelper.CreateDeafult(download.DownloadInfo.DownloadUrl, request =>
{
if (download.CurrentDownloadedLength > 0)
{
request.AddRange(download.CurrentDownloadedLength);
}
});
}
catch (Exception e) when(e.Message.Contains("416"))
{
Log.Error("Redownload file because of HttpCode416...");
file_stream?.Dispose();
File.Delete(temp_dl_path);
file_stream = FileStreamHolder[download] = File.OpenWrite(temp_dl_path);
download.CurrentDownloadedLength = file_stream.Length;
file_stream.Seek(download.CurrentDownloadedLength, SeekOrigin.Begin);
response = RequestHelper.CreateDeafult(download.DownloadInfo.DownloadUrl);
}
using var response_stream = response.GetResponseStream();
var buffer = new byte[1024];
int read_bytes = 0;
do
{
read_bytes = response_stream.Read(buffer, 0, buffer.Length);
if (download.Status != DownloadTaskStatus.Started || !file_stream.CanWrite)
{
Log.Debug($"Notice that download task {download.DownloadInfo.FileName} still continue to write when task status is not started.");
return;
}
file_stream.Write(buffer, 0, read_bytes);
file_stream.Flush();
download.CurrentDownloadedLength += read_bytes;
} while (read_bytes != 0);
//downloading finished
file_stream.Dispose();
if (File.Exists(download.DownloadInfo.DownloadFullPath))
{
File.Delete(download.DownloadInfo.DownloadFullPath);
}
File.Move(temp_dl_path, download.DownloadInfo.DownloadFullPath);
download.Status = DownloadTaskStatus.Finished;
Log.Info($"Downloading task {download.DownloadInfo.FileName} now finished.");
}
catch (Exception e)
{
Log.Error(e.Message);
ExceptionHelper.DebugThrow(e);
//error ocured
download.ErrorMessage = e.Message;
DownloadPause(download);
Toast.ShowMessage($"无法开始下载此图片:{e.Message}");
}
finally
{
file_stream?.Dispose();
}
}
private void ShowRedownloadConfimPanel(Button sender, DownloadWrapper download_task)
{
var panel = (sender.Parent as FrameworkElement).FindName("RedownloadPanel") as Popup;
panel.IsOpen = true;
}
