File Upload Sample in Dart

file_upload_sample.dart

final List<int> data = new List<int>();

req.inputStream.onData = () {
  data.addAll(req.inputStream.read());
};

req.inputStream.onClosed = () {
  String dataString = new String.fromCharCodes(data);
  List<String> contents = dataString.split('\n');

  String webKitFormBoundary = contents[0];
  String contentDisposition = contents[1];
  String contentType = contents[2];

  String fileBody = '';
  for (int i = 4; i < (contents.length - 2); i++) {
    String content = contents[i];
    if (!content.startsWith(webKitFormBoundary)) {
      fileBody = '$fileBody$content\n';
    }
  }

  res.write(fileBody);
  res.outputStream.close();
}