anchor.diff:    
                     if (new Path(request.uri.path).segments().contains('..')) {
                       // Invalid path.
  -                    request.response.statusCode = 403;
  +                    request.response.statusCode = HttpStatus.FORBIDDEN;
                       request.response.close();
                       return;
                     }
  
positive.code:       // If If-Modified-Since is present and file haven't changed, return 304.
        if (request.headers.ifModifiedSince != null &&
            !lastModified.isAfter(request.headers.ifModifiedSince)) {
          response.statusCode = 304;
          response.close();
          return;
        }
  
negative.code:   
                            default:
                              // File not found, fall back to 404.
                              request.response.statusCode = HttpStatus.NOT_FOUND;
                              request.response.write("File not found");
                              request.response.close();
                              break;
  