dont.rb

require 'digest/md5'
class Hash  
  def to_query
    require 'uri'
    self.collect{ |k,v| k.to_s.downcase + '=' + URI::escape(v)}.join('&')
  end
end
caPin = "1234"
caSubDomain   = "track"
query = {
  :caOrderValue     => '0.00',
  :caOrderReference => 'blafoo',
  :caEventID        => 'somenumber',
  :caComment        => '',
  :caMultiple       => '1',
  :caItems          => '',
  :caCustomerID     => '',
  :caProductID      => '', 
  :caVoucherCode	 => '',
  :caSLang       => 'ruby',
  :caLang        => 'de_DE', 
  :caProgramID   => '5678', 
  :caVer     => '1.2', #version
}
query[:cachecksum] = Digest::MD5.hexdigest(caPin+query.to_query)
#i'm sure this could be better written server-side and serve up exactly what's
#needed
#it could also benefit from structure from URI::HTTP once that's done
#oh, and haml will make it pretty
caUri = '://'+caSubDomain+'.coolaffiliate.com/transaction.html?'+query.to_query;
puts '<script language="javascript" type="text/javascript">'
puts 'if (location.protocol.toLowerCase() == "https:"){caProtocol="https";}else{caProtocol="http";}'
puts 'caUri = caProtocol + "'+caUri+'" + "&caprotocol=" + caProtocol + "&calocation=" + location.href;'
puts 'document.write(\'<sc\'+\'ript language="JavaScript"  type="text/javascript" src="\'+caUri+\'"></sc\'+\'ript>\');'
puts '</script>'
puts '<noscript><img src="https://'+caSubDomain+'.coolaffiliate.com/transaction.html?'+query.to_query+'&caprotocol=https" alt="" width="1" height="1"/>'
puts '</noscript>'