rucaptcha/lib/rucaptcha.rb

require 'rails'
require 'action_controller'
require 'active_support/all'
require 'rucaptcha/rucaptcha'
require 'rucaptcha/version'
require 'rucaptcha/configuration'
require 'rucaptcha/controller_helpers'
require 'rucaptcha/view_helpers'
require 'rucaptcha/cache'
require 'rucaptcha/engine'
require 'rucaptcha/errors/configuration'

module RuCaptcha
  class << self
    def config
      return @config if defined?(@config)
      @config = Configuration.new
      @config.style       = :colorful
      @config.length    = 5
      @config.line    = true
      @config.expires_in  = 2.minutes
      if Rails.application
        @config.cache_store = Rails.application.config.cache_store
      else
        @config.cache_store = :mem_cache_store
      end
      @config.cache_store
      @config
    end

    def configure(&block)
      config.instance_exec(&block)
    end

    def generate()
      style = config.style == :colorful ? 1 : 0
      length = config.length
      raise Rucaptcha::Errors::Configuration, 'length config error, value must in 3..7' unless length.in?(3..7)
      line = config.line ? 1 : 0
      self.create(style, length, line)
    end

    def check_cache_store!
      cache_store = RuCaptcha.config.cache_store
      store_name = cache_store.is_a?(Array) ? cache_store.first : cache_store
      if [:memory_store, :null_store, :file_store].include?(store_name)
        RuCaptcha.config.cache_store = [:file_store, Rails.root.join('tmp/cache/rucaptcha/session')]

        puts "

  RuCaptcha's cache_store requirements are stored across processes and machines,
  such as :mem_cache_store, :redis_store, or other distributed storage.
  But your current set is #{cache_store}, it has changed to :file_store for working.
  NOTE: :file_store is still not a good way, it only works with single server case.

  Please make config file `config/initializers/rucaptcha.rb` to setup `cache_store`.
  More infomation please read GitHub RuCaptcha README file.
  https://github.com/huacnlee/rucaptcha

"
      end
    end
  end
end

ActiveSupport.on_load(:action_controller) do
  ActionController::Base.send :include, RuCaptcha::ControllerHelpers
end

ActiveSupport.on_load(:action_view) do
  include RuCaptcha::ViewHelpers
end