simplemixpanel.rb

require 'rubygems'
require 'base64'
require 'json'
require 'httparty'

# based on https://mixpanel.com/docs/integration-libraries/ruby. Changed to use httpparty, rather than fork a process
module MixPanel
  include HTTParty
  TOKEN = "PUT YOUR TOKEN HERE"
  base_uri "https://api.mixpanel.com/"
  def self.track(event, properties={})
    properties[:token] = TOKEN
    params = {event: event, properties: properties}
    data = Base64.strict_encode64(JSON.generate(params))
    post URI.encode "/track?data=#{data}"
  end
end

data = {
  key: "value",
  user_agent: "chrome",
  content_type: "json"
}
MixPanel.track("now on the body", data)