UUID Base64

uuid.rb

#!/usr/bin/ruby

require "securerandom"
require "base64"

100.times do

uuid = SecureRandom.uuid

puts "  UUID: #{uuid.inspect}"
puts "   HEX: #{(hex = uuid.gsub("-", "")).inspect}"
puts " BYTES: #{(bytes = [hex].pack('H*')).inspect}"

base64 = Base64.urlsafe_encode64(bytes, padding: false)

puts "BASE64: #{base64.inspect}"

puts " BYTES: #{(bytes2 = Base64.urlsafe_decode64(base64)).inspect}"
puts "   HEX: #{(hex2 = bytes2.unpack("H*")[0]).inspect}"
puts "  UUID: #{(uuid2 = [hex2[0..7], hex2[8..11], hex2[12..15], hex2[16..19], hex2[20..31]].join("-")).inspect}"
puts

raise unless uuid == uuid2
end