WayneTrum / rucaptcha-pure-number

#1
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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. There is NO: RMagick

Example


Feature
  • Only need ImageMagick, No RMagick, No mini_magick;
  • For Rails Application;
  • Simple, Easy to use;
  • File Caching for performance.
Requirements
  • ImageMagick 6.9+
Ubuntu
sudo apt-get install imagemagick ghostscript

Mac OS X
brew install imagemagick ghostscript

Usage
Put rucaptcha in your Gemfile:

gem 'rucaptcha'

Create config/initializers/rucaptcha.rb
Code:
RuCaptcha.configure do
  # Number of chars, default: 4
  self.len = 4
  # Image font size, default: 45
  self.font_size = 45
  # Cache generated images in file store, this is config files limit, default: 100
  # set 0 to disable file cache.
  self.cache_limit = 100
  # Custom captcha code expire time if you need, default: 2 minutes
  # self.expires_in = 120
  # Color style, default: :colorful, allows: [:colorful, :black_white]
  # self.style = :colorful
  # [Requirement]
  # Store Captcha code where, this config more like Rails config.cache_store
  # default: Rails application config.cache_store
  # But RuCaptcha requirements cache_store not in [:null_store, :memory_store, :file_store]
  self.cache_store = :mem_cache_store
end
Edit config/routes.rb, add the following code:
Code:
Rails.application.routes.draw do
  ...
  mount RuCaptcha::Engine => "/rucaptcha"
  ...
end
Controller app/controller/account_controller.rb
Code:
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
TIP: Sometime you may need keep last verified captcha code in session on verify_rucaptcha? method call, you can use keep_session: true. For example: Verify_rucaptcha? (@user, keep_session: true).

View app/views/account/new.html.erb
Code:
<form>
  ...
  <div class="form-group">
    <%= rucaptcha_input_tag(class: 'form-control', placeholder: 'Input Captcha') %>
    <%= rucaptcha_image_tag(alt: 'Captcha') %>
  </div>
  ...
</form>
And if you are use Devise, you can read this to add validation: RuCaptcha with Devise.

Documentation https://github.com/WayneTrum/rucaptcha-pure-number