gistfile1.txt

require 'rubygems'
require 'sinatra'
require 'sinatra/captcha'
require 'erb'
 
get '/' do
  erb :captcha
end
 
post '/' do
  halt(401, "invalid captcha") unless captcha_pass?
  "passed!"
end
 
__END__
 
@@ captcha
 
<form method="post" action="/">
<%= captcha_image_tag %>
<%= captcha_answer_tag %>	
<input type="submit" value="Submit!">  
</form>