private DocumentFile CreateFile(DownloadDetails details, DownloadDetails.RootDirectoryDetails root, bool useExistingFile)
{
lock (LockFile)
{
return(useExistingFile ? details.FindOrCreateFile(root) : details.CreateNewFile(root));
}
}
public void OpenFile(DownloadDetails details)
{
CheckWhetherDownloadManagerIsConfigured();
var task = new Task <DocumentFile>(() =>
{
if (StorageUtils.IsInAnyStorageDevices(_configuration.Context, details.DownloadDirectory, out string rootDirectory) == false)
{
throw new System.Exception($"Could not locate the root directory for the download location, '{details.DownloadDirectory}'.");
}
var rootDirectoryDocument = _configuration.StoragePermissionsHandler.RequestStoragePermission(rootDirectory);
var rootDetails = new DownloadDetails.RootDirectoryDetails(rootDirectory, rootDirectoryDocument);
return(details.FindFile(rootDetails));
});
task.ContinueWith(result =>
{
try
{
var foundFile = result.Result;
if (foundFile == null)
{
throw new FileNotFoundException($"The file '{details.FileName}' could not be located. Perhaps it was moved or deleted.");
}
TriggerOpenFileIntent(_configuration.Context, foundFile.Uri, details.MimeType);
}
catch (ActivityNotFoundException ex) { OnOpenRequestError?.Invoke(this, ex); }
catch (FileNotFoundException ex) { OnOpenRequestError?.Invoke(this, ex); }
catch { /* IGNORED */ }
});
task.Start();
}
private void OnDownloadTaskStarted(Object objDetails)
{
if (!(objDetails is object[] objects) || objects.Length < 3)
{
DownloadManager.Instance.TriggerDownloadErrorOccurredEvent(null, new DownloadManager.Exception(DownloadManager.Exception.Type.InvalidConfiguration, "Invalid details provided."));
return;
}
var configuration = objects[0] as DownloadManagerConfiguration;
var downloadDetails = objects[1] as DownloadDetails;
var useExistingFile = (bool)objects[2];
if (configuration == null || downloadDetails == null)
{
DownloadManager.Instance.TriggerDownloadErrorOccurredEvent(null, new DownloadManager.Exception(DownloadManager.Exception.Type.InvalidConfiguration, "Invalid details provided."));
return;
}
try
{
if (StorageUtils.IsInAnyStorageDevices(configuration.Context, downloadDetails.DownloadDirectory, out string rootDirectory) == false)
{
throw new DownloadManager.Exception(DownloadManager.Exception.Type.FileNotFound, $"Could not locate the root directory for the download location, '{downloadDetails.DownloadDirectory}'.");
}
var rootDirectoryDocument = RequestStoragePermission(configuration, rootDirectory);
var rootDetails = new DownloadDetails.RootDirectoryDetails(rootDirectory, rootDirectoryDocument);
var downloadingFile = CreateFile(downloadDetails, rootDetails, useExistingFile);
var downloadedSize = downloadingFile.Length();
var stream = HttpUtilities.GetDownloadStream(downloadDetails.Url, downloadedSize, out var totalFileSize);
downloadDetails.ContentUri = downloadingFile.Uri;
downloadDetails.CurrentProgress.Update(downloadedSize, totalFileSize);
DownloadManager.Instance.TriggerDownloadStartedEvent(downloadDetails, totalFileSize);
if (StorageUtils.CheckSpaceAvailable(configuration.Context, rootDetails, totalFileSize - downloadedSize) == false)
{
throw new DownloadManager.Exception(DownloadManager.Exception.Type.InsufficientSpace);
}
if (downloadedSize == totalFileSize)
{
DownloadManager.Instance.TriggerDownloadCompletedEvent(downloadDetails);
return;
}
var fileStream = DocumentFileStream.Create(configuration, downloadingFile);
var reportingProgress = 0;
var reportingThreshold = 512 * 1024;
while (stream.CanRead)
{
byte[] data = new byte[8192];
var readLength = stream.Read(data, 0, data.Length);
if (readLength <= 0)
{
break;
}
fileStream.Write(data, readLength);
downloadedSize += readLength;
reportingProgress += readLength;
downloadDetails.CurrentProgress.Update(downloadedSize, totalFileSize);
if (reportingProgress >= reportingThreshold)
{
reportingProgress = 0;
DownloadManager.Instance.TriggerDownloadProgressChangedEvent(downloadDetails, downloadedSize, totalFileSize);
}
}
try
{
fileStream.Close();
stream.Close();
}
catch { /* IGNORED */ }
downloadDetails.CurrentProgress.Update(downloadedSize, totalFileSize);
DownloadManager.Instance.TriggerDownloadProgressChangedEvent(downloadDetails, downloadedSize, totalFileSize);
if (downloadedSize == totalFileSize)
{
DownloadManager.Instance.TriggerDownloadCompletedEvent(downloadDetails);
}
else
{
DownloadManager.Instance.TriggerDownloadErrorOccurredEvent(downloadDetails, new DownloadManager.Exception(DownloadManager.Exception.Type.StreamEndedBeforeCompletion, "The data stream ended before the entire file was downloaded"));
}
}
catch (ThreadAbortException)
{
DownloadManager.Instance.TriggerDownloadErrorOccurredEvent(downloadDetails, new DownloadManager.Exception(DownloadManager.Exception.Type.UserCancelled));
}
catch (ThreadInterruptedException)
{
DownloadManager.Instance.TriggerDownloadErrorOccurredEvent(downloadDetails, new DownloadManager.Exception(DownloadManager.Exception.Type.UserCancelled));
}
catch (Exception e)
{
DownloadManager.Instance.TriggerDownloadErrorOccurredEvent(downloadDetails, new DownloadManager.Exception(DownloadManager.Exception.Type.Unknown, e));
}
}
