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Merb plugin that provides recaptcha.net service helpers
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README.rdoc

merb-recaptcha

About

Merb-recaptcha is plugin for Merb web-framework. It provides view and controller helpers for Recaptcha service.

Installation

Install gem from github.com:

gem install merb-recaptcha --source=http://gemcutter.org

Add following line in config/dependencies.rb of your web application:

dependency "merb-recaptcha", "~> 1.0.0", :require_as => "merb-recaptcha"

Sign up at Recaptcha and get public and private keys. Add keys in config/init.rb:

Merb::BootLoader.after_app_loads do
  Merb::Plugins.config[:merb_recaptcha][:public_key] = "... here your public key ..."
  Merb::Plugins.config[:merb_recaptcha][:private_key] = "... here your private key ..."
end

Usage

Just add helper in your form:

<%= form_for @users, :action => resource(:users), :method => :post do %>
  .....
  <%= recaptcha_tags %>
  <%= submit "Send" %>
<% end %>

And then check captcha in controller:

class Users < Application
  ......
  def create(user)
    @user = User.new(user)
    if (captcha_correct = recaptcha_valid?) && @user.save
      redirect resource(@user)
    else
      unless captcha_correct
        @user.valid?
        @user.errors.add(:general, "Captcha code is incorrect")
      end
    end
    render :new
  end
  ......
end
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