Redis Readonly Console

redis.rb

if ENV['REDIS_ACCESS_MODE'] == 'readonly'
  class Redis
    class Client
      WRITE_COMMANDS = ::Rails.cache.data.command.map { |a| a[0] if a[2].include?('write') }.compact.to_set.freeze

      def process(commands)
        if commands.flatten.any? { |c| WRITE_COMMANDS.include?(c.to_s) }
          raise NotImplementedError, "REDIS_ACCESS_MODE is set to 'readonly', disallowing writes"
        end

        logging(commands) do
          ensure_connected do
            commands.each do |command|
              if command_map[command.first]
                command = command.dup
                command[0] = command_map[command.first]
              end

              write(command)
            end

            yield if block_given?
          end
        end
      end
    end
  end
end