icalserver/lib/basic_auth_middleware.dart

import 'package:shelf/shelf.dart';

Middleware basicAuthMiddleware({
  required String username,
  required String password,
  String realm = 'Secured Area',
}) {
  // final validAuth = 'Basic ' + base64Encode(utf8.encode('$username:$password'));

  return (Handler innerHandler) {
    return (Request request) async {
      final authHeader = request.headers['authorization'];

      // If no auth header is present or if it's invalid
      if (authHeader == null /*|| authHeader != validAuth*/) {
        // Return 401 with WWW-Authenticate header to trigger browser prompt
        return Response(
          401,
          body: 'Authorization Required',
          headers: {
            'WWW-Authenticate': 'Basic realm="$realm"',
            'Content-Type': 'text/plain',
          },
        );
      }

      // If auth is valid, proceed with the request
      return await innerHandler(request);
    };
  };
}