i3-ipc.rb

#!/usr/bin/env ruby
# encoding: utf-8

require 'socket'
require 'json'
require 'pp'

I3_SOCKET_PATH = "/tmp/i3-ipc.sock"

message = "i3-ipc" + [0,1].pack("LL")

socket = UNIXSocket.new(I3_SOCKET_PATH)

len = socket.write(message)
buffer = socket.read(len)
abort('wrong answer') unless buffer[0, "i3-ipc".length]

len, type = buffer[6..-1].unpack("LL")
abort('wrong type returned') unless type == 1

ws = socket.read(len)
js_ws = JSON.parse(ws)

pp js_ws