CoderDecorator 
It's a encoding/decoding library for Ruby designed with decorator pattern, which makes it more flexible, and can be wrapped infinitely using Ruby instantiation.
This gem can refers to this pull request.
Install
gem install 'coder_decorator'
Usage
Encode data with Marshal and Base64:
require 'coder_decorator'
include CoderDecorator
coder = Coders::Base64.new(Coders::Marshal.new)
encoded_data = coder.encode(data)
coder.decode(encoded_data)Encode data with JSON and Zip:
require 'coder_decorator'
include CoderDecorator
coder = Coders::Zip.new(Coders::JSON.new)
encoded_data = coder.encode(data)
coder.decode(encoded_data)Coders are listed in lib/coder_decorator/coders.
Integration with Rack
require 'rack'
require 'coder_decorator'
include CoderDecorator
app = lambda do |env|
session = env['rack.session']
session[:count] ||= 0
session[:count] += 1
[200, {}, [session[:count].to_s]]
end
coder = Coders::Rescue.new(
Coders::HMAC.new(
Coders::Cipher.new(
Coders::JSON.new,
secret: 'x' * 32
),
secret: 'y' * 32
)
)
app = Rack::Builder.app(app) do
use Rack::Session::Cookie, coder: coder, let_coder_handle_secure_encoding: true
end
Rack::Handler::WEBrick.run app