class ActionDispatch::Request::Utils::CustomParamEncoder

def self.encode(request, params, controller, action)
  return params unless controller && controller.valid_encoding? && encoding_template = action_encoding_template(request, controller, action)
  params.except(:controller, :action).each do |key, value|
    ActionDispatch::Request::Utils.each_param_value(value) do |param|
      # If `param` is frozen, it comes from the router defaults
      next if param.frozen?
      if encoding_template[key.to_s]
        param.force_encoding(encoding_template[key.to_s])
      end
    end
  end
  params
end