stupid_captcha

about

Simple stupid captcha, use it with flash.

how it works

• Flash ask for captcha, for example at /captcha.json
• get json with id and img
• send post with data, captcha_id and captcha_input
• validate captcha on serwer side
• save data

settings

create file config/stupid_captcha.rb and set StupidCaptcha settings

use rake secret to generate some good salt

if defined?(StupidCaptcha)
  StupidCaptcha.setup do |config|
    # salt, use rake secret to generate goog salt
    config.salt = "5b213328a3ed873013c553f15......."

    # fonts path, point to directory, default GEM_RROT/assets/fonts
    config.fonts_path = Rails.root.join('artwork/fonts').to_s

    # set fonts array directly (fonts_path is not used), you can find default fonts in GEM_RROT/assets/fonts
    config.fonts = [
      Rails.root.join('artwork/fonts/1.ttf').to_s
    ]

    # backgrounds path, point to directory, default GEM_RROT/assets/backgrounds
    config.backgrounds_path = Rails.root.join('artwork/backgrounds').to_s

    # set backgrounds array directly (backgrounds_path is not used), you can find default fonts in GEM_RROT/assets/backgrounds
    config.backgrounds = [
      Rails.root.join('artwork/backgrounds/1.png').to_s
    ]

    # colors
    config.colors = %w{black}

  end
end

use it

create captcha controller

require 'base64'

class CaptchaController < ApplicationController
  def index
    c = StupidCaptcha::Captcha.new
    c.reset

    respond_to do |wants|
      wants.json  do
        render text: {
          id: c.hash,
          img: Base64.encode64(c.to_blob)
        }.to_json
      end
    end
  end
end

create data controller

class DataController < ApplicationController
  def create
    @data = Data.new(params[:data])

    respond_to do |wants|
      if StupidCaptcha::Captcha.new.check(params[:captcha_id], params[:captcha_input]) && @data.save
        flash[:notice] = 'Data was successfully created.'
        wants.html { redirect_to(@data) }
        wants.xml  { render :xml => @data, :status => :created, :location => @data }
      else
        wants.html { render :action => "new" }
        wants.xml  { render :xml => @data.errors, :status => :unprocessable_entity }
      end
    end
  end
end

routing

get  '/captcha', :controller => "captcha", :action => 'index'
post '/data'   , :controller => "data"   , :action => 'create'

Help

Looking for help?

email to me: lisukorin [at] gmail [dot] com,

don't forget write 'stupid captcha' in subject or my mail client will treat your message as spam.