MathCaptcha

TODO: Create form helpers

Validates your Model to be saved by a human (or very clever script) by asking the user to solve a very basic mathematical equation.

It does not use the session to store the secret, but uses AES from EzCrypto.

Requirements

• gem ezcrypto
• users who can calculate

Usage

In your Model < ActiveRecord::Base

  has_captcha

In your form view:

  <%= @model.captcha.task %> = ?
  <%= form.text_field :captcha_solution %>
  <%= form.hidden_field :captcha_secret %>

If you want to skip the validation (in tests/specs), you can

  Model.skip_captcha!   # or
  @model.skip_captcha!

and turn that off by

  Model.dont_skip_captcha!   # or
  @model.dont_skip_captcha!

Copyright (c) 2007 Pat Nakajima, released under the MIT license Copyright (c) 2009 Niklas Hofer, released under the MIT license