finalize method Null safety

  1. @override
ByteStream finalize()
override

Freezes all mutable fields and returns a single-subscription ByteStream that will emit the request body.

Implementation

@override
http.ByteStream finalize() {
  final byteStream = super.finalize();
  if (onProgress == null) return byteStream;

  final total = contentLength;
  var bytes = 0;

  final t = StreamTransformer.fromHandlers(
    handleData: (List<int> data, EventSink<List<int>> sink) {
      bytes += data.length;
      if (onProgress != null) {
        onProgress!(bytes, total);
      }
      sink.add(data);
    },
  );
  final stream = byteStream.transform(t);
  return http.ByteStream(stream);
}