httpRouteHandler function

RouteData? httpRouteHandler(HttpRequest req)

Implementation

RouteData? httpRouteHandler(HttpRequest req) {
  /// read Host once. only domain routes need it.
  _routeIndex();
  String? host = _hasDomain ? req.headers.value(HttpHeaders.hostHeader) : null;
  RouteData? route = _getMatchRoute(req.uri.path, req.method, host);

  /// HEAD runs the GET route when there is no HEAD route.
  /// the server sends the status and headers, with no body.
  if (route == null && req.method == 'HEAD') {
    route = _getMatchRoute(req.uri.path, 'GET', host);
  }

  if (route == null) {
    /// answer preflight OPTIONS with 204 and cors headers.
    /// use cors setting of the route the browser is asking about.
    if (req.method == HttpRequestMethod.OPTIONS.name) {
      RouteData? target = _getMatchRoute(
        req.uri.path,
        req.headers.value('access-control-request-method') ?? '',
        host,
      );
      httpCorsHandler(target?.corsEnabled, req);
      req.response.statusCode = HttpStatus.noContent;
      responseDataHandler(null, req);
    } else {
      /// same path as a thrown 404, so the app ExceptionHandler and
      /// responseHandler can format it. the default body is JSON.
      httpErrorHandler(
        req,
        NotFoundHttpException(
          message: '${req.method} ${req.uri.path} not found',
        ),
        StackTrace.empty,
      );
    }
  }
  return route;
}