JS "intro" Packer

JSIP takes any piece of "JavaScript" and packs into a 100% valid PNG image file, which is then "loaded" and "decoded" at run-time.

Unlike other similar "packers", it doesn't not rely on any custom PNG chunks or other "hacks", as a result you can expect the actual "compressed" size to be slightly larger than usual.

Wasting a few bytes, for better compatibility, is totally acceptable.

Please keep in mind, that even with the indirect "eval", there's quite a significant performance hit on the "evaluated" code.

Be sure to test the "result" in multiple browsers.

Usage

./jsip.rb 2k.js > 2k.html

or

ruby jsip.rb 2k.js > 2k.html

or as a "library"

require 'jsip'

File.open('hello_world.html', 'w') do |f|
  f.write(JSIP::HTML.format('hello world', JSIP::GrayScalePNG.new(JSIP::JS.clean('alert("hello world");'))))
end

Contribute

• Fork the project.
• Make your feature addition or bug fix.
• Do not bump the version number.
• Send me a pull request. Bonus points for topic branches.

License

Released into the Public Domain. No warranty implied. Use at your own risk.