encode

# File actionpack/lib/action_dispatch/request/utils.rb, line 84
        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