shelf_path woes

gistfile1.dart

library shelfmiddleware.checktoken;

import 'headers.dart';
import 'token.dart';

import 'package:shelf/shelf.dart' as shelf;
import 'package:shelf_path/shelf_path.dart';

final shelf.Middleware checkToken = shelf.createMiddleware(requestHandler: _passOrForbid);

shelf.Response _passOrForbid(shelf.Request request) {
  final String token = Uri.splitQueryString(request.url.query)['token'];

  print('BEGIN');
  print(getPathParameter(request, 'token')); // This is null..
  print('END');

  if(isValid(token)) {
    return null;
  }

  final String newToken = getToken();

  final String html = ''' 
    <h1>Grab a Token!</h1>
    <p>Click <a href="/app?token=${newToken}">here</a> to venture forth to app/</p>
    <p>Token: ${newToken}
  ''';

  return new shelf.Response.forbidden(html, headers: textHtmlHeader);
}