onRequest method

  1. @override
void onRequest(
  1. RequestOptions options,
  2. RequestInterceptorHandler handler
)

Called when the request is about to be sent.

Implementation

@override
void onRequest(RequestOptions options, RequestInterceptorHandler handler) {
  final Map<String, String>? header = headerCallback();

  if (header != null) {
    options.headers.addAll(header);
  }
  return super.onRequest(options, handler);
}