Recording flight data from frightradar24

fr24.rb

#!/usr/bin/ruby

# 参考URL
# http://www.mk-mode.com/octopress/2016/02/08/fr24-getting-flight-info/

require 'json'
require 'open-uri'
require 'timeout'
require 'csv'

BALANCE_URL = 'http://www.flightradar24.com/balance.json'
URL = 'http://data-live.flightradar24.com/zones/fcgi/feed.js?bounds=34.300317,30.003735,128.861654,135.054609&adsb=1&air=1&array=1'

KYUSHU_SHIKOKU_AREA = {
  left_up:    {lat:34.300317, lon:128.861654},
  right_down: {lat:30.003735, lon:135.054609}
}

def get_json
  str = nil
  timeout(2) do
    str = open(URL, {"User-Agent" => "Magic Browser"}) { |f| f.read }
  end
  JSON.parse(str)
rescue => e
  raise
end

def save_csv(json)
  CSV.open("./flightdata/#{Time.now.utc.strftime("%Y%m%d")}.csv", "a") do |csv|
    json['aircraft'].each do |aircraft|
      aircraft[0], aircraft[11] = aircraft[11], aircraft[0] #先頭要素を時刻にする
      csv << aircraft
    end
  end
end

loop do
  save_csv(get_json)
  sleep 3
end

Thanks!