Tells you your IP address and a xip.io address to the same for common Ruby app server ports

whatismyip.rb

#!/usr/bin/env ruby

require 'net/http'
require 'uri'
require 'fileutils'

class App
  # The website configured for this constant should serve text/plain with
  # nothing but the IP address. Feel free to substitute your own.
  IP_URL = 'http://wtfismyip.com/text'

  # "Main" application method; this runs on script execute
  def run
    public_ip = get_page(IP_URL).chomp
    app_name = pow_name ? "#{pow_name}." : nil

    puts "Public IP:"
    puts public_ip
    puts ""
    puts "App server URLs (click thrice to select):"
    puts "http://#{app_name}#{public_ip}.xip.io"
    puts "http://#{app_name}#{public_ip}.xip.io:3000"
    puts "http://#{app_name}#{public_ip}.xip.io:4567"
  end

  # Fetch a page from the internets, return the contents
  def get_page(url)
    Net::HTTP.get(URI.parse(url))
  end

  # Returns the name of the pow app or nil if none are found
  def pow_name
    pwd = Dir.pwd
    powfiles = Dir[File.join(ENV['HOME'], '.pow','*')]
    powfiles.select! do |powfile|
      File.realdirpath(powfile) == pwd
    end
    powfiles.first ? File.basename(powfiles.first) : nil
  end
end

App.new.run