NAME
      raptcha.rb

    SYNOPSIS
      super low drain bamage, K.I.S.S., storage-less, session-less,
      plugin-less, dependency-less, zero admin, single-source-file secure
      captcha system for ruby and/or rails.

      bitchin.

    DESCRIPTION
      raptcha manages image generation via a streaming controller.  the result
      is that *no* disk storage is ever needed for captcha images.  it also
      manages authentication via openssl(aes-256) encoded hidden fields which
      are relayed through the form submission process, obviating the need for
      session/database interaction for captcha validation.  the library is
      useful outside of rails, even from the command line.

      what this means to you is that you can have a nice looking, and easy to
      customize, safe captcha solution in about 1 minute that requires zero
      maintenance moving forward.

      see a sample image here
        http://github.com/ahoward/raptcha/blob/master/images/raptcha.png

    INSTALL
      1) INSTALL Image Magick 
          ~> which convert

      2) COPY A SINGLE FILE INTO YOUR RAILS APP
          ~> cp raptcha.rb ./app/lib/

      3) GENERATE THE CONROLLER
          ruby lib/raptcha.rb generate controller

      4) ADD A ROUTE
          match 'raptcha(/:action)', :controller => 'raptcha'

      5) PUT A RAPTCHA IMAGE AND FORM INPUT IN YOUR VIEW
          <%= Raptcha.input %>

      6) REQUIRE VALID RAPTCHA INPUT IN A CONTROLLER ACTION
          class SessionsController < ApplicationController
            def create 
              unless Raptcha.valid?(params)
                # ...
              end
            end
          end

      7) TRY THE EXAMPLES LOCALLY AT
          http://0.0.0.0:3000/raptcha/form
          http://0.0.0.0:3000/raptcha/inline

    URIS
      http://github.com/ahoward/raptcha
      http://codforpeople.com


    COMMAND LINE USAGE
      * make an image by hand
        ~> ruby lib/raptcha.rb image foreground:pink raptcha.png && open raptcha.png

      * generate the controller
        ~> ruby lib/rapcha.rb generate controller

    DOC
      less lib/raptcha.rb