normalize_encode_params

# File actionpack/lib/action_dispatch/http/parameters.rb, line 59
      def normalize_encode_params(params)
        if params.is_a?(String)
          return params.force_encoding(Encoding::UTF_8).encode!
        elsif !params.is_a?(Hash)
          return params
        end

        new_hash = {}
        params.each do |k, v|
          new_key = k.is_a?(String) ? k.dup.force_encoding(Encoding::UTF_8).encode! : k
          new_hash[new_key] =
            case v
            when Hash
              normalize_encode_params(v)
            when Array
              v.map! {|el| normalize_encode_params(el) }
            else
              normalize_encode_params(v)
            end
        end
        new_hash.with_indifferent_access
      end