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EasyCaptchaA simple captcha implementation for rails 3 based on rmagick
Tested with Rails 3.2.8
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Installationadd to Gemfile
gem 'easy_captcha' gem 'rmagick'
for java you can use
gem 'rmagick4j'
after bundle execute
rails g easy_captcha:install
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ConfigurationYou can configure easy_captcha in “config/initializers/easy_captcha.rb”, if you want to customize the default configuration
EasyCaptcha.setup do |config| # Cache # config.cache = true # Cache temp dir from Rails.root # config.cache_temp_dir = Rails.root.join('tmp/captchas') # Cache size # config.cache_size = 500 # Cache expire # config.cache_expire = 1.days # Chars # config.chars = %w(2 3 4 5 6 7 9 A C D E F G H J K L M N P Q R S T U X Y Z) # Length # config.length = 6 # Image # config.image_height = 40 # config.image_width = 140 # eSpeak (default disabled) # config.espeak do |espeak| # Amplitude, 0 to 200 # espeak.amplitude = 80..120 # Word gap. Pause between words # espeak.gap = 80 # Pitch adjustment, 0 to 99 # espeak.pitch = 30..70 # Use voice file of this name from espeak-data/voices # espeak.voice = nil # end # configure generator # config.generator :default do |generator| # Font # generator.font_size = 24 # generator.font_fill_color = '#333333' # generator.font_stroke_color = '#000000' # generator.font_stroke = 0 # generator.font = File.expand_path('../../resources/afont.ttf', __FILE__) # Background color # generator.image_background_color = "#FFFFFF" # Or background image (e.g. transparent png) # generator.background_image = File.expand_path('../../resources/captcha_bg.png', __FILE__) # Wave # generator.wave = true # generator.wave_length = (60..100) # generator.wave_amplitude = (3..5) # Sketch # generator.sketch = true # generator.sketch_radius = 3 # generator.sketch_sigma = 1 # Implode # generator.implode = 0.1 # Blur # generator.blur = true # generator.blur_radius = 1 # generator.blur_sigma = 2 # end end
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Requirements-
RMagick
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Rails 3 (github.com/rails/rails)
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Example<% form_tag '/' do %> <% if request.post? %> <p><%= valid_captcha?(params[:captcha]) ? 'valid' : 'invalid' %> captcha</p> <% end %> <p><%= captcha_tag %></p> <p><%= text_field_tag :captcha %></p> <p><%= submit_tag 'Validate' %></p> <% end %>
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Example appYou find an example app under: github.com/phatworx/easy_captcha_example
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History-
0.1 init
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0.2 cache support for high frequented sites
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0.3 use generators, optimizations, update licence to same of all my plugins
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0.4 generator support
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0.5 (transparent) background support
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0.6 espeak support for barrier-free support
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Maintainers-
Team Phatworx (github.com/phatworx)
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Marco Scholl (github.com/traxanos)
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Alexander Dreher (github.com/alexdreher)
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Contributing to EasyCaptcha-
Check out the latest master to make sure the feature hasn’t been implemented or the bug hasn’t been fixed yet
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Check out the issue tracker to make sure someone already hasn’t requested it and/or contributed it
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Fork the project
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Start a feature/bugfix branch
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Commit and push until you are happy with your contribution
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Make sure to add tests for it. This is important so I don’t break it in a future version unintentionally.
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Please try not to mess with the Rakefile, version, or history. If you want to have your own version, or is otherwise necessary, that is fine, but please isolate to its own commit so I can cherry-pick around it.
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CopyrightCopyright © 2010 Marco Scholl. See LICENSE.txt for further details.