readFullyAsBytes function

Future<Uint8List> readFullyAsBytes(HttpClientResponse response)

Implementation

Future<Uint8List> readFullyAsBytes(HttpClientResponse response) {
  final Completer<Uint8List> completer = Completer<Uint8List>.sync();
  if (response.contentLength == -1) {
    final List<List<int>> chunks = <List<int>>[];
    int contentLength = 0;
    response.listen((List<int> chunk) {
      chunks.add(chunk);
      contentLength += chunk.length;
    }, onDone: () {
      final Uint8List bytes = Uint8List(contentLength);
      int offset = 0;
      for (List<int> chunk in chunks) {
        bytes.setRange(offset, offset + chunk.length, chunk);
        offset += chunk.length;
      }
      completer.complete(bytes);
    }, onError: completer.completeError, cancelOnError: true);
  } else {
    // If the response has a content length, then allocate a buffer of the correct size.
    final Uint8List bytes = Uint8List(response.contentLength);
    int offset = 0;
    response.listen(
        (List<int> chunk) {
          bytes.setRange(offset, offset + chunk.length, chunk);
          offset += chunk.length;
        },
        onError: completer.completeError,
        onDone: () {
          completer.complete(bytes);
        },
        cancelOnError: true);
  }
  return completer.future;
}