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public StartAsync ( ) : DownloadOperation>.IAsyncOperationWithProgress |
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| 리턴 | DownloadOperation>.IAsyncOperationWithProgress | |
private async Task StartDownloadAsync(DownloadOperation downloadOperation)
{
try
{
DownloadButton.IsEnabled = false;
_activeDownload.Add(downloadOperation);
var progress = new Progress<DownloadOperation>(ProgressCallback);
await downloadOperation.StartAsync().AsTask(progress);
//await downloadOperation.StartAsync();
}
catch(Exception ex)
{
Debug.WriteLine(ex.Message);
}
}
private async Task HandleDownloadAsync(DownloadOperation download, bool start, Func<IStorageFile, Task> finish, Action<string> callBack, Action<double> progressHandler)
{
_progressCall = progressHandler;
string notifica = "";
try
{
Progress<DownloadOperation> progressCallback = new Progress<DownloadOperation>(DownloadProgress);
if (start)
{
// Start the download and attach a progress handler.
await download.StartAsync().AsTask(cts.Token, progressCallback);
}
else
{
// The download was already running when the application started, re-attach the progress handler.
await download.AttachAsync().AsTask(cts.Token, progressCallback);
}
ResponseInformation response = download.GetResponseInformation();
}
catch (TaskCanceledException)
{
notifica = "Download Cancelado, tente novamente mais tarde";
//LogStatus("Canceled: " + download.Guid, NotifyType.StatusMessage);
}
catch (Exception ex)
{
notifica = "-- Erro desconhecido --";
notifica = string.Format("{0}\n{1}", notifica, ex.ToString());
}
finally
{
_downloadOp = null;
}
if (notifica == "")
{
await finish(download.ResultFile);
}
else
{
await download.ResultFile.DeleteAsync();
callBack(notifica);
}
}
private async Task HandleDownloadAsync(DownloadOperation download,bool start) {
try {
//LogStatus("Running: " + download.Guid,NotifyType.StatusMessage);
// Store the download so we can pause/resume.
activeDownloads.Add(download);
Progress<DownloadOperation> progressCallback = new Progress<DownloadOperation>(DownloadProgress);
if(start) {
// Start the download and attach a progress handler.
await download.StartAsync().AsTask(cts.Token,progressCallback);
}
else {
// The download was already running when the application started, re-attach the progress handler.
await download.AttachAsync().AsTask(cts.Token,progressCallback);
}
ResponseInformation response = download.GetResponseInformation();
// GetResponseInformation() returns null for non-HTTP transfers (e.g., FTP).
string statusCode = response != null ? response.StatusCode.ToString() : String.Empty;
//LogStatus(
// String.Format(
// CultureInfo.CurrentCulture,
// "Completed: {0}, Status Code: {1}",
// download.Guid,
// statusCode),
// NotifyType.StatusMessage);
}
catch(TaskCanceledException) {
//LogStatus("Canceled: " + download.Guid,NotifyType.StatusMessage);
}
catch{
//if(!IsExceptionHandled("Execution error",ex,download)) {
//throw;
//}
}
finally {
activeDownloads.Remove(download);
}
}
private async Task HandleDownloadAsync(DownloadOperation download, bool start)
{
try
{
//LogStatus("Running: " + download.Guid, NotifyType.StatusMessage);
// Store the download so we can pause/resume.
//activeDownloads.Add(download);
cts = new CancellationTokenSource();
//Progress<DownloadOperation> progressCallback = new Progress<DownloadOperation>(DownloadProgress);
if (start)
{
// Start the download and attach a progress handler.
await download.StartAsync().AsTask(cts.Token, null);
}
else
{
// The download was already running when the application started, re-attach the progress handler.
await download.AttachAsync().AsTask(cts.Token, null);
}
ShowMessageDialog("Download Complete!");
ResponseInformation response = download.GetResponseInformation();
//LogStatus(String.Format("Completed: {0}, Status Code: {1}", download.Guid, response.StatusCode),
//NotifyType.StatusMessage);
}
catch (TaskCanceledException e)
{
//LogStatus("Canceled: " + download.Guid, NotifyType.StatusMessage);
}
catch (Exception ex)
{
ShowMessageDialog("Execution error!12");
//if (!IsExceptionHandled("Execution error", ex, download))
//{
// throw;
//}
}
finally
{
//activeDownloads.Remove(download);
}
}
private async Task StartDownloadAsync(DownloadOperation downloadOperation)
{
_activeDownload = downloadOperation;
var progress = new Progress<DownloadOperation>(ProgressCallback);
await downloadOperation.StartAsync().AsTask(progress);
}
private async Task HandleDownloadAsync(DownloadOperation download, bool start)
{
try
{
// Store the download so we can pause/resume.
activeDownloads.Add(download);
if (start)
{
// Start the download and attach a progress handler.
await download.StartAsync();
}
else
{
// The download was already running when the application started, re-attach the progress handler.
await download.AttachAsync();
}
}
catch (TaskCanceledException)
{
}
catch (Exception ex)
{
}
finally
{
activeDownloads.Remove(download);
}
}
private async Task HandleDownloadAsync(DownloadOperation downloadOperation)
{
var progressCallback = new Progress<DownloadOperation>(this.DownloadProgress);
await downloadOperation.StartAsync().AsTask(this._CancellationTokenSource.Token, progressCallback);
}
private async Task HandleDownloadAsync(DownloadOperation download, bool start)
{
try
{
LogStatus("Running: " + download.Guid, NotifyType.StatusMessage);
// Store the download so we can pause/resume.
activeDownloads.Add(download);
Progress<DownloadOperation> progressCallback = new Progress<DownloadOperation>(DownloadProgress);
if (start)
{
// Start the download and attach a progress handler.
await download.StartAsync().AsTask(cts.Token, progressCallback);
}
else
{
// The download was already running when the application started, re-attach the progress handler.
await download.AttachAsync().AsTask(cts.Token, progressCallback);
}
ResponseInformation response = download.GetResponseInformation();
LogStatus(String.Format(CultureInfo.CurrentCulture, "Completed: {0}, Status Code: {1}",
download.Guid, response.StatusCode), NotifyType.StatusMessage);
}
catch (TaskCanceledException)
{
LogStatus("Canceled: " + download.Guid, NotifyType.StatusMessage);
}
catch (Exception ex)
{
if (!IsExceptionHandled("Execution error", ex, download))
{
throw;
}
}
finally
{
activeDownloads.Remove(download);
}
}
/// <summary>
/// Hanbdles a single BackgroundDownload for a song.
/// </summary>
private async void HandleDownload(Track track, DownloadOperation download, bool start)
{
track.BackgroundDownload = new BackgroundDownload(download);
ActiveDownloads.Add(track);
Debug.WriteLine("Added {0} to active downloads", track);
try
{
var progressCallback = new Progress<DownloadOperation>(DownloadProgress);
if (start)
{
// Start the BackgroundDownload and attach a progress handler.
await
download.StartAsync()
.AsTask(track.BackgroundDownload.CancellationTokenSrc.Token, progressCallback);
}
else
{
// The BackgroundDownload was already running when the application started, re-attach the progress handler.
await
download.AttachAsync()
.AsTask(track.BackgroundDownload.CancellationTokenSrc.Token, progressCallback);
}
//Download Completed
var response = download.GetResponseInformation();
//Make sure it is success
if (response.StatusCode < 400)
{
await DownloadFinishedForAsync(track);
}
else
{
Debug.WriteLine("Download status code for {0} is bad :/", track);
track.Status = TrackStatus.None;
await _libraryService.UpdateTrackAsync(track);
await ((DownloadOperation)track.BackgroundDownload.DownloadOperation).ResultFile.DeleteAsync();
}
}
catch
{
Debug.WriteLine("Download cancelled {0}", track);
track.AudioLocalUri = null;
track.Status = TrackStatus.None;
await _libraryService.UpdateTrackAsync(track);
await ((DownloadOperation)track.BackgroundDownload.DownloadOperation).ResultFile.DeleteAsync();
}
finally
{
ActiveDownloads.Remove(track);
}
}
private static async Task HandleDownloadAsync(DownloadOperation download, bool start, Action<DownloadOperation> downloadProgress)
{
CancellationTokenSource cts = new CancellationTokenSource();
DownloadCancelOperation opration = new DownloadCancelOperation()
{
DownloadKey=download.ResultFile.Name,
DownLoad = download,
CancelToken = cts
};
try
{
Debug.WriteLine("Running: " + download.Guid);
// Store the download so we can pause/resume.
ActiveDownloads.Add(opration);
if (downloadProgress!=null)
{
Progress<DownloadOperation> progressCallback = new Progress<DownloadOperation>(downloadProgress);
if (start)
{
// Start the download and attach a progress handler.
await download.StartAsync().AsTask(cts.Token, progressCallback);
}
else
{
// The download was already running when the application started, re-attach the progress handler.
await download.AttachAsync().AsTask(cts.Token, progressCallback);
}
}
else
{
if (start)
{
await download.StartAsync().AsTask(cts.Token);
}
else
{
await download.AttachAsync().AsTask(cts.Token);
}
}
ResponseInformation response = download.GetResponseInformation();
// GetResponseInformation() returns null for non-HTTP transfers (e.g., FTP).
string statusCode = response != null ? response.StatusCode.ToString() : String.Empty;
Debug.WriteLine(
String.Format(
CultureInfo.CurrentCulture,
"Completed: {0}, Status Code: {1}",
download.Guid,
statusCode
));
}
catch (TaskCanceledException)
{
Debug.WriteLine("Canceled: " + download.Guid);
}
catch (Exception ex)
{
if (!IsExceptionHandled("Execution error", ex, download))
{
throw;
}
}
finally
{
opration.CancelToken.Dispose();
ActiveDownloads.Remove(opration);
}
}
private async void ManageDownloadsAsync(DownloadOperation downloadOperation, bool start)
{
try
{
_activeDownloadOperationList.Add(downloadOperation);
Progress<DownloadOperation> downloadProgressCallback = new Progress<DownloadOperation>(ManageDownloadProgress);
if (start)
{
await downloadOperation.StartAsync().AsTask(_cancellationTokenSource.Token, downloadProgressCallback);
}
//else
//{
// // downlaod was already running on app-start
// await downloadOperation.AttachAsync().AsTask(_cancellationTokenSource.Token, downloadProgressCallback);
//}
// TODO report that download with ID: downloadOperation.Guid has finished --> fire an event
}
catch (TaskCanceledException)
{
// Download Canceled
}
catch (Exception ex)
{
// TODO add error Handling
}
finally
{
_activeDownloadOperationList.Remove(downloadOperation);
}
}
private async void handleDownloadAsync(DownloadOperation download, Episode episode, DownloadState downloadState)
{
try
{
logger.LogMessage($"EpisodesViewModel: Registering download of file {download.ResultFile.Name}.", LoggingLevel.Information);
activeDownloadsByDownload.Add(download, episode);
if (activeDownloadsByEpisode.Keys.Contains(episode))
{
activeDownloadsByEpisode[episode].Add(download);
}
else
{
activeDownloadsByEpisode.Add(episode, new List<DownloadOperation> { download });
}
Progress<DownloadOperation> progressCallback = new Progress<DownloadOperation>(downloadProgress);
#if DEBUG
download.CostPolicy = BackgroundTransferCostPolicy.Always;
#endif
if (downloadState == DownloadState.NotStarted)
{
logger.LogMessage($"EpisodesViewModel: Download hasn't been started yet. Starting it.");
await download.StartAsync().AsTask(progressCallback).ConfigureAwait(false);
}
if (downloadState == DownloadState.AlreadyRunning)
{
logger.LogMessage($"EpisodesViewModel: Download has been already started. Attaching progress handler to it.");
await download.AttachAsync().AsTask(progressCallback);
}
ResponseInformation response = download.GetResponseInformation();
logger.LogMessage($"EpisodesViewModel: Download of {download.ResultFile.Name} completed. Status Code: {response.StatusCode}", LoggingLevel.Information);
await CoreApplication.MainView.CoreWindow.Dispatcher.RunAsync(CoreDispatcherPriority.Normal, () => episode.Status = Loaded);
}
catch (TaskCanceledException)
{
logger.LogMessage("Download cancelled.");
await CoreApplication.MainView.CoreWindow.Dispatcher.RunAsync(CoreDispatcherPriority.Normal, () => episode.Status = CanBeLoaded);
await fileUtils.TryDeleteFile(download.ResultFile.Name);
}
catch (Exception ex)
{
logger.LogMessage($"EpisodesViewModel: Download error. {ex.Message}", LoggingLevel.Error);
await CoreApplication.MainView.CoreWindow.Dispatcher.RunAsync(CoreDispatcherPriority.Normal, () => episode.Status = CanBeLoaded);
await fileUtils.TryDeleteFile(download.ResultFile.Name);
}
finally
{
unregisterDownlod(download, episode);
}
}
private async Task HandleDownloadAsync(DownloadOperation download, bool start)
{
try
{
Progress<DownloadOperation> progressCallback = new Progress<DownloadOperation>(DownloadProgress);
if (start)
{
await download.StartAsync().AsTask(progressCallback);
}
else
{
await download.AttachAsync().AsTask(progressCallback);
}
}
catch (Exception ex)
{
Debug.WriteLine(ex.ToString());
UpdateTaskCompleted();
}
}
private async void Start_Click(object sender, RoutedEventArgs e)
{
BackgroundDownloader downloader = CreateDownloader();
try
{
IStorageFile file = await KnownFolders.PicturesLibrary.CreateFileAsync("downloadFile.txt", CreationCollisionOption.GenerateUniqueName);
Uri uri = new Uri(UriBox.Text);
slowDownload = downloader.CreateDownload(uri, file);
downloadCancellationTokenSource = new CancellationTokenSource();
ProgressBlock.Text = String.Empty;
StartBlock.Text = String.Format("Guid: {0}\r\nPath: {1}", slowDownload.Guid, slowDownload.ResultFile.Path);
HeadersBlock.Text = String.Empty;
Progress<DownloadOperation> progressCallback = new Progress<DownloadOperation>(OnDownloadProgress);
var task = slowDownload.StartAsync().AsTask(downloadCancellationTokenSource.Token, progressCallback);
var notAwaited = task.ContinueWith(OnDownloadCompleted, slowDownload);
}
catch (Exception ex)
{
DisplayException(ex);
}
}
private async Task HandleDownloadAsync(DownloadOperation download, bool start)
{
// Create progress callback
Progress<DownloadOperation> progressCallback = new Progress<DownloadOperation>(DownloadProgress);
// Create cancellation token
CancellationTokenSource cts = new CancellationTokenSource();
if (start)
{
// Start the download and attach a progress handler.
await download.StartAsync().AsTask(cts.Token, progressCallback);
}
else
{
// The download was scheduled in a previous session, re-attach the progress handler.
await download.AttachAsync().AsTask(cts.Token, progressCallback);
}
}
/// <summary>
/// Hanbdles a single BackgroundDownload for a song.
/// </summary>
/// <param name="song">
/// The song to be downloaded
/// </param>
/// <param name="download">
/// The download operation
/// </param>
/// <param name="start">
/// Either the download is started or just handled
/// </param>
private async void HandleDownload(Song song, DownloadOperation download, bool start)
{
if (song == null || download == null)
{
return;
}
song.Download = new BackgroundDownload(download);
ActiveDownloads.Add(song);
try
{
var progressCallback = new Progress<DownloadOperation>(DownloadProgress);
if (start)
{
// Start the BackgroundDownload and attach a progress handler.
await download.StartAsync().AsTask(song.Download.CancellationTokenSrc.Token, progressCallback);
}
else
{
// The BackgroundDownload was already running when the application started, re-attach the progress handler.
await download.AttachAsync().AsTask(song.Download.CancellationTokenSrc.Token, progressCallback);
}
// Download Completed
var response = download.GetResponseInformation();
// Make sure it is success
if (response.StatusCode < 400)
{
await DownloadFinishedForAsync(song);
}
else
{
song.SongState = SongState.None;
sqlService.UpdateItem(song);
download.ResultFile.DeleteAsync();
}
}
catch
{
song.SongState = SongState.None;
sqlService.UpdateItem(song);
download.ResultFile.DeleteAsync();
}
finally
{
ActiveDownloads.Remove(song);
}
}
private async Task<StorageFile> StartDownloadAsync(DownloadOperation downloadOperation)
{
try
{
Download = downloadOperation;
await downloadOperation.StartAsync().AsTask(cts.Token, progressCallback);
CurrentDownloadedBytes += (long)downloadOperation.Progress.BytesReceived;
return (StorageFile)downloadOperation.ResultFile;
}
catch (Exception e)
{
Downloading = false;
CurrentDownloadedBytes = 0;
foreach (Playlist downloadedPlaylist in currentlyDownloadingPlaylists)
{
RemoveDownload(downloadedPlaylist);//may not have even started downloading this playlist when this is called
}
currentlyDownloadingPlaylists = new List<Playlist>();
return null;
}
}
private async Task HandleDownloadAsync(DownloadOperation download)
{
try
{
// For more advanced Background Transfer features, please take a look at the
// BackgroundTransfer sample.
if (download.Progress.Status == BackgroundTransferStatus.Idle)
{
await download.StartAsync();
}
else
{
await download.AttachAsync();
}
ResponseInformation response = download.GetResponseInformation();
// GetResponseInformation() returns null for non-HTTP transfers (e.g., FTP).
string statusCode = response != null ? response.StatusCode.ToString() : String.Empty;
rootPage.NotifyUser(String.Format(CultureInfo.CurrentCulture,
"Successfully completed background download: {0}, Status Code: {1}",
download.Guid,
statusCode),
NotifyType.StatusMessage);
}
catch (Exception ex)
{
rootPage.NotifyUser(ex.ToString(), NotifyType.ErrorMessage);
}
}
private async Task HandleDownloadAsync(DownloadOperation download, bool start, IProgress<int> progress = null, CancellationToken cancelToken = default(CancellationToken))
{
var app = Application.Current as App;
try
{
// Store the download so we can pause/resume.
app.activeDownloads.Add(download);
Progress<DownloadOperation> progressCallback = new Progress<DownloadOperation>((operation) =>
{
if (operation.Progress.TotalBytesToReceive != 0)
{
ulong val = (ulong)(operation.Progress.BytesReceived * 100 / operation.Progress.TotalBytesToReceive);
progress.Report((int)val);
}
});
if (start)
{
// Start the download and attach a progress handler.
await download.StartAsync().AsTask(cancelToken, progressCallback);
}
else
{
// The download was already running when the application started, re-attach the progress handler.
await download.AttachAsync().AsTask(cancelToken, progressCallback);
}
}
catch (TaskCanceledException)
{
}
catch (Exception)
{
}
finally
{
app.activeDownloads.Remove(download);
}
}
private async Task DownloadAsync(DownloadOperation download)
{
Log(String.Format(CultureInfo.CurrentCulture, "Downloading {0}", download.ResultFile.Name));
try
{
await download.StartAsync();
LogStatus(String.Format(CultureInfo.CurrentCulture, "Downloading {0} completed.", download.ResultFile.Name), NotifyType.StatusMessage);
}
catch (TaskCanceledException)
{
}
catch (Exception ex)
{
if (!IsExceptionHandled("Execution error", ex, download))
{
throw;
}
}
}
private async Task HandleDownloadAsync(DownloadOperation download, DownloadInfo info, bool start)
{
try
{
_activeDownloads[info.ChannelId] = download;
_cts[info.ChannelId] = new CancellationTokenSource();
var progressCallback = new Progress<DownloadOperation>(downOperation =>
{
DownloadProgress(downOperation, info);
});
if (start)
{
await download.StartAsync().AsTask(_cts[info.ChannelId].Token, progressCallback);
}
else
{
await download.AttachAsync().AsTask(_cts[info.ChannelId].Token, progressCallback);
}
_activeDownloads.Remove(info.ChannelId);
_cts.Remove(info.ChannelId);
var response = download.GetResponseInformation();
_isDownloading = false;
DownloadCompleted(info);
}
catch (System.Threading.Tasks.TaskCanceledException) { }
catch (Exception ex)
{
_isDownloading = false;
DownloadFailture(info, ex.Message);
}
}
private async Task HandleDownloadAsync(DownloadOperation download)
{
try
{
activeDownloads.Add(download);
await download.StartAsync().AsTask();
Debug.WriteLine("------------------------" + Environment.NewLine +
"Download Started" + Environment.NewLine +
"Filename : " + download.ResultFile.Name + Environment.NewLine +
"Folder : " + download.ResultFile.Path + Environment.NewLine +
"------------------------");
ResponseInformation response = download.GetResponseInformation();
}
finally
{
activeDownloads.Remove(download);
Debug.WriteLine("------------------------" + Environment.NewLine +
"Download Finished" + Environment.NewLine +
"Filename : " + download.ResultFile.Name + Environment.NewLine +
"Folder : " + download.ResultFile.Path + Environment.NewLine +
"------------------------");
}
}
private async Task StartDownloadAsync(DownloadOperation downloadOperation)
{
// backButton_Copy.IsEnabled = false;
ConnectionProfile connections = NetworkInformation.GetInternetConnectionProfile();
if (connections != null && connections.GetNetworkConnectivityLevel() == NetworkConnectivityLevel.InternetAccess)
{
_activeDownload = downloadOperation;
var progress = new Progress<DownloadOperation>(ProgressCallback);
await downloadOperation.StartAsync().AsTask(progress);
}
else
{
ConnectionException();
}
}