getHeaderFormData method

Future<Map> getHeaderFormData()

Retrieves form data from a multipart/form-data request.

This method processes the multipart form data, extracting fields and files from the request. Fields are stored as a map of strings, while files are stored as a map of byte lists.

Returns a Future<Map<String, dynamic>> containing:

• fields: A map of form fields with their respective values.
• files: A map of files with their contents as byte lists.

Implementation

Future<Map> getHeaderFormData() async {
  final fields = <String, String>{};
  final files = <String, List<int>>{};
  final contentType = _rq.headers.contentType;
  if (contentType?.mimeType == 'multipart/form-data') {
    final transformer =
        MimeMultipartTransformer(contentType!.parameters['boundary']!);

    final parts = await transformer.bind(_rq).toList();

    await Future.forEach(parts, (part) async {
      final contentDisposition = part.headers['content-disposition'];
      if (contentDisposition != null) {
        final nameMatch =
            RegExp(r'name="(.+?)"').firstMatch(contentDisposition);
        final filenameMatch =
            RegExp(r'filename="(.+?)"').firstMatch(contentDisposition);
        if (filenameMatch != null) {
          //final filename = filenameMatch.group(1);
          final fileBytes = await part
              .fold<List<int>>([], (bytes, data) => bytes..addAll(data));
          files[nameMatch!.group(1)!] = fileBytes;
        } else {
          final value = await utf8.decodeStream(part);
          fields[nameMatch!.group(1)!] = value;
        }
      }
    });
  }

  return {
    'fields': fields,
    'files': files,
  };
}