This is a generate qrcode tool, resolve between pc and smart phone or pad translate tiny information.

qrcode

#! /usr/bin/env ruby

require "rqrcode"
require "uuid"
require "erb"

@qr = RQRCode::QRCode.new(ARGV[0])

file = File.expand_path($0)

begin
    io = ::IO.respond_to?(:binread) ? ::IO.binread(file) : ::IO.read(file)
    app, data = io.gsub("\r\n", "\n").split(/^__END__$/, 2)
rescue Errno::ENOENT
    app, data = nil
end

if !data
    puts "No template found."
    exit -1
end

TEMPLATE = ERB.new data

File.open("/tmp/qrcode-#{UUID.generate}.html", 'w+') do |output|
    content = TEMPLATE.result(binding)
    output.write content

    puts "Output path:\n#{output.path}"
    system("open -a safari #{output.path}")
end

__END__
<style type="text/css">
 table {
  border-width: 0;
  border-style: none;
  border-color: #0000ff;
  border-collapse: collapse;
 }
 td {
   border-width: 0;
   border-style: none;
   border-color: #0000ff;
   border-collapse: collapse;
   padding: 0;
   margin: 0;
   width: 10px;
   height: 10px;
 }
 td.black { background-color: #000; }
 td.white { background-color: #fff; }
</style>
 
<table>
 <% @qr.modules.each_index do |x|%>
   <tr>
   <% @qr.modules.each_index do |y|%>
    <% if @qr.dark?(x,y)%>
    <td class="black"/>
    <% else%>
    <td class="white"/>
    <% end%>
   <% end%>
   </tr>
 <% end%>
</table>