Matcha

Mathcha is a horribly-named, arithmetic-based, text-driven captcha. Why you ask? For very few good reasons:

• I had never written a plugin.
• I wanted to play with a few bits of technology I hadn't touched:
  • git
  • github
  • gemcutter, gem packaging, jeweler
• I really like Recaptcha it's just that I've seen a few folk using simple math problems; I prefer it.
• I need this functionality across a few applications I've been working on.

Note

This thing is nascent, fledgling, and was produced in a matter of hours. I haven't thoroughly tested it yet so don't put too much faith in it. Please feel free to fork and dress up. I plan on staying on top of this over the next few weeks and getting something put together that I'm happy to push on my peers.

Installation

First, install the gem:

sudo gem install mathcha

Next, modify your config/environment.rb to reference the mathcha gem:

config.gem "mathcha", :source => "http://gemcutter.org"

Usage

In your view (this will dump the proper input and a hidden key field)

<%= mathcha_tag %>

In your controller

if (verify_mathcha(params))

Copyright (c) 2009 Cory Wilkerson, released under the MIT license