public void CancelDownload()
{
_downloadCanceled = true;
if (_wc != null && _wc.IsBusy)
{
_wc.CancelAsync();
}
Logger.Log("Download canceled");
if (DownloadCanceled != null)
{
Task.Run(() => DownloadCanceled.Invoke(null));
}
}
// ダウンロード完了
private async Task OnDownloadCompleted(Task <DownloadOperation> prevTask)
{
if (prevTask.IsFaulted)
{
return;
}
Debug.WriteLine("キャッシュ完了");
if (prevTask.Result != null)
{
var op = prevTask.Result;
var info = NiconicoMediaManager.CacheRequestInfoFromFileName(op.ResultFile);
await RemoveDownloadOperation(info);
if (op.Progress.Status == BackgroundTransferStatus.Completed)
{
if (op.Progress.TotalBytesToReceive == op.Progress.BytesReceived)
{
Debug.WriteLine("キャッシュ済み: " + op.ResultFile.Name);
DownloadCompleted?.Invoke(this, info, op.ResultFile.Path);
}
else
{
Debug.WriteLine("キャッシュキャンセル: " + op.ResultFile.Name);
DownloadCanceled?.Invoke(this, info);
}
using (var pendingVideoLockReleaser = await _CacheDownloadPendingVideosLock.LockAsync())
{
_CacheDownloadPendingVideos.Remove(info);
}
}
else
{
Debug.WriteLine($"キャッシュ失敗: {op.ResultFile.Name} （再ダウンロードします）");
DownloadCanceled?.Invoke(this, info);
await AddCacheRequest(info.RawVideoId, info.Quality, forceUpdate : true);
}
try
{
if (op.TransferGroup != null &&
_BackgroundTransferCompletionInfoMap.ContainsKey(op.TransferGroup.Name)
)
{
var btcInfo = _BackgroundTransferCompletionInfoMap[op.TransferGroup.Name];
btcInfo.TaskRegistration.Unregister(cancelTask: false);
_BackgroundTransferCompletionInfoMap.Remove(op.TransferGroup.Name);
}
}
catch
{
Debug.WriteLine("failed unregister background download completion task.");
}
}
await TryNextCacheRequestedVideoDownload();
}
protected void OnDownloadCanceled(DownloadCanceledEventArgs e)
{
DownloadCanceled?.Invoke(this, e);
DownloadsUpdated?.Invoke(this);
}
private void _wc_DownloadFileCompleted(object sender, AsyncCompletedEventArgs e)
{
bool errorOccured = false;
if (e.Error != null)
{
errorOccured = true;
string text = "Error occured while downloading dependency " + _currentDependency.Name + ": \n" + e.Error.Message;
if (!_downloadCanceled)
{
Logger.Log("Error while doanloading dependency: " + _currentDependency.Name, Logger.LogLevel.error);
Logger.Log("Error was: " + e.Error.Message, Logger.LogLevel.error);
}
if (e.Error is System.Net.WebException)
{
if (_downloadCanceled)
{
text = null;
}
else
{
CancelDownload();
}
}
Exception ex = null;
if (text != null)
{
ex = new Exception(text);
}
if (DownloadCanceled != null)
{
Task.Run(() => DownloadCanceled.Invoke(ex));
}
cleanup();
return;
}
Logger.Log("Download complete: " + _currentDependency.Name);
if (_downloadCanceled || errorOccured)
{
return;
}
Task.Run(() => {
Logger.Log("Extracting dependency: " + _currentDependency.Name);
if (ExtractionStarted != null)
{
Task.Run(() => ExtractionStarted(_currentDependency.Name));
}
try {
extractDependency();
} catch (Exception ex) {
Logger.Log("Error while removing temp directory: " + ex.Message, Logger.LogLevel.error);
if (ErrorOccured != null)
{
Task.Run(() => ErrorOccured.Invoke(ex));
}
}
});
}
