A basic ruby script to serve up NFC reader responses in json

omega-nfc-server.rb

#!/usr/bin/ruby
require 'json'
require 'webrick'

def get_nfc
  all = Array.new
  current = Hash.new
  `nfc-list`.split("\n").each do |line|
    if line =~ /ATQA.+:\s((:?[\da-f]{2}\s+)+)/
      current = Hash.new
      current['ATQA'] = $1.gsub(/\s+/,'')
    elsif line =~ /UID.+:\s((:?[\da-f]{2}\s+)+)/
      current['UID'] = $1.gsub(/\s+/,'')
    elsif line =~ /SAK.+:\s((:?[\da-f]{2}\s+)+)/
      current['SAK'] = $1.gsub(/\s+/,'')
      all << current
    end
  end

  all.to_json
end

server = WEBrick::HTTPServer.new :Port => 3000

server.mount_proc '/' do |req, res|
  res.status = 200
  res['Content-Type'] = 'application/json'
  res.body = get_nfc
end

server.start