NAME
flatulent : CAPTCHA for FIGLET.
SYNOPSIS
the flatulent gem provides brain dead simple to use, but internally cunning,
ascii art (figlet) captcha for ruby.
URI
http://codeforpeople.com/lib/ruby
http://rubyforge.org/projects/codeforpeople
HOW DO I GET FLATULENT?
gem install flatulent
HISTORY 0.0.3: - following are now all equivalent when posting (thanks botp)
0==o==O==Q (zero, oh's, and queue)
l==l (one and el)
2==z==Z (two and z's)
5==s==S (5 and s's)
- random horizontal and vertical displacement of each char
- vastly improved background noise based on figlet char shapes
- inputs are case sensitive (thanks john joyce, chris carter)
- expanded rails examples
0.0.2
- ajax gets stinky: Flatulent.ajax! the result of this new addition is
that the captcha itself doesn't appear in the source file at all
- blowfish encoding for timebomb and captcha fields
- auto server key configuration using hostname and mac address
- improved noise algorithm
- improved character placement (chars shared edges to make ocr'ing harder)
0.0.1
- initial version
RAILS EXAMPLES
REGULAR METHOD (LESS SECURE):
def controller_action
if params.has_key? 'flatulent'
Flatulent.validate! params
end
render :inline => " <html><body>\n \#{ Flatulent.form }\n </body></html>\n html\nend\n\nAJAX METHOD (MORE SECURE):\n\ndef controller_action\n if params.has_key? 'flatulent'\n Flatulent.validate! params\n end\n\n render :inline => <<-html\n <html>\n <head> <%= javascript_include_tag 'prototype' %> </head>\n <body>\n <form action='./' method='post'>\n <%= Flatulent.ajax %>\n <input type='submit' name='submit' value='submit' />\n </form>\n </body>\n </html>\n html\nend\n"
DOCS
see source in ./lib/*
see the example rails project in ./rails
ONLINE SAMPLES
http://drawohara.tumblr.com/post/4791838
http://drawohara.tumblr.com/post/4944987
http://drawohara.tumblr.com/post/4968766
ONLINE DEMO OF AJAX METHOD
http://fortytwo.merseine.nu:3000/flatulent/ajax -- try to break it!