get_lat_long

#!/usr/bin/env ruby

require 'open-uri'


class IpInfoDb
  attr_reader :source

  URI = "http://ipinfodb.com"

  def initialize
    @source = open(URI).read
  end

  def self.get_lat_long
    new.get_lat_long
  end

  def latitude
    @latitude ||= get("Latitude")
  end

  def longitude
    @longitude ||= get("Longitude")
  end

  def get_lat_long
    "#{latitude}:#{longitude}"
  end

  private
  def get(which)
    source.match(%r{<li>#{which} : (.*)</li>}) && $1
  end
end

puts IpInfoDb.get_lat_long

redshift.sh

#!/bin/bash
while ! get_lat_long >/dev/null; do
    echo "No connection, retrying in 5 seconds"
    sleep 5
done
redshift-gtk -l $(get_lat_long)