RuCaptcha

This is a Captcha gem for Rails Applications. It runs an ImageMagick command to draw Captcha image - so it has NO performance issues or memory leak issues.

Idea by: https://ruby-china.org/topics/20558#reply4

Requirements

• ImageMagick

Usage

Put rucaptcha in your Gemfile:

gem 'rucaptcha'

Create config/initializes/rucaptcha.rb

RuCaptcha.configure do
  # Number of chars, default: 4
  self.len = 4
  # Image width, default: 180
  self.width = 180
  # Image height, default: 48
  self.height = 48
end

Controller app/controller/account_controller.rb

class AccountController < ApplicationController
  def create
    @user = User.new(params[:user])
    if verify_rucaptcha?(@user) && @user.save
      redirect_to root_path, notice: 'Sign up successed.'
    else
      render 'account/new'
    end
  end
end

View app/views/account/new.html.erb

<form>
  ...
  <div class="form-group">
    <%= rucaptcha_input_tag(class: 'form-control', placeholder: 'Input Captcha') %>
    <%= rucaptcha_image_tag(alt: 'Captcha') %>
  </div>
  ...
</form>