exportFile static method

Future<bool> exportFile(String key, String destinationPath, { UStorageBucket bucket = UStorageBucket.support, })

Writes a plaintext copy of key to destinationPath (decrypting vault entries).

Implementation

static Future<bool> exportFile(String key, String destinationPath, {UStorageBucket bucket = UStorageBucket.support}) async {
  if (!_backend.hasFileSystem) throw UnsupportedError("exportFile needs a file system.");
  await _ensure();
  if (_live(key, bucket) == null) return false;
  if (bucket == UStorageBucket.vault) {
    final UStorageSink sink = await _backend.open(destinationPath, truncate: true);
    int position = 0;
    try {
      await for (final Uint8List chunk in read(key, bucket: bucket)) {
        await sink.writeAt(position, chunk);
        position += chunk.length;
      }
    } finally {
      await sink.close();
    }
  } else {
    await _backend.copy(_pathFor(bucket, key), destinationPath);
  }
  return true;
}