private async Task DoBackup(Uri uri, string password)
{
var backup = new Backup(
_authSource.GetAll(),
_categorySource.GetAll(),
_authSource.CategoryBindings,
_customIconSource.GetAll()
);
var dataToWrite = backup.ToBytes(password);
// This is the only way of reliably writing files using SAF on Xamarin.
// A file output stream will usually create 0 byte files on virtual storage such as Google Drive
var output = ContentResolver.OpenOutputStream(uri, "rwt");
var dataStream = new DataOutputStream(output);
try
{
await dataStream.WriteAsync(dataToWrite);
await dataStream.FlushAsync();
}
finally
{
dataStream.Close();
output.Close();
}
}
public static async Task WriteFile(Context context, Uri uri, byte[] data)
{
// Run backup on separate thread, file writing on the main thread fails when using Nextcloud
await Task.Run(async delegate
{
// This is the only way of reliably writing binary files using SAF on Xamarin.
// A file output stream will usually create 0 byte files on virtual storage such as Google Drive
Stream output = null;
DataOutputStream dataStream = null;
try
{
output = context.ContentResolver.OpenOutputStream(uri);
dataStream = new DataOutputStream(output);
await dataStream.WriteAsync(data);
await dataStream.FlushAsync();
}
finally
{
dataStream?.Close();
output?.Close();
}
});
}