"API":http://sargon.interinter.net/validates_captcha/ "SVN":http://nimrod.interinter.net/plugins/trunk/validates_captcha ValidatesCaptcha provides CAPTCHA for your Rails application, if you really, really need it. It has two types of "challenges" built-in, the familiar image challenge and the increasingly familiar logic challenge. The latter is the better choice, because the image challenge is much more inaccessible, and it depends on "RMagick":http://rmagick.rubyforge.org/. This plugin is a little outdated, but I guess it still works as well as it ever has. h3. Quick how-to There's a few different things you can customise, but you can read about that in the "API reference":http://sargon.interinter.net/validates_captcha/, so I'll keep this short and simple and only go through setting up the logic challenge. Before starting, install the plugin with the _script/plugin_ script in your @RAILS_ROOT@. [terminal] script/plugin install http://nimrod.interinter.net/plugins/trunk/validates_captcha [/terminal] h3. Prepare application After that, the first thing you need to do is make sure there's a writable directory where the challenges can be stored in a PStore file (no, it doesn't scale well :-). You can create this with the built-in generator: [terminal] script/generate captcha store_directory [/terminal] Then generate a _captcha.yml_ configuration file: [terminal] script/generate captcha config [/terminal] The generated config file should be pretty easy to figure out just by reading it. h3. Model [ruby] class Comment < ActiveRecord::Base validates_captcha end [/ruby] h3. View [rhtml] <% c = prepare_captcha :type => :question -%> <%= captcha_hidden_field c, 'comment' %> <%= captcha_question_as_label c, 'comment' %> <%= captcha_text_field 'comment' %> [/rhtml] h3. Controller [ruby] def create comment = Comment.new(params[:comment]) if comment.save #Captcha passed flash[:notice] = 'Comment was saved' redirect_to comments_url else #Captcha not passed, or other validation error flash[:error] = 'Could not save comment' redirect_to new_comment_url end end [/ruby] 2007-04-13T23:13:24-04:00 3 true validates_captcha

2008-04-18T12:04:27-04:00