Weather Underground Ruby Sample; Show current temps in F, download radar animation gif and launch Safari to view it

wunderground_inquiry.rb

#!/usr/bin/env ruby
# See http://api.wunderground.com/weather/api/d/documentation.html
require 'open-uri'
require 'json'

zip=ARGV[0]||27571
apikey=YOURWUGAPIKEYHERE

open("http://api.wunderground.com/api/#{apikey}/conditions/forecast/q/#{zip}.json") do |f|
	json_string = f.read
	parsed_json = JSON.parse(json_string)
	location = parsed_json['current_observation']['display_location']['city']
	temp_f = parsed_json['current_observation']['temp_f']
	print "Current temperature in #{location} is: #{temp_f} deg F\n"
end

# Radar api:
open("http://api.wunderground.com/api/#{apikey}/animatedradar/q/#{zip}.gif?newmaps=1&timelabel=1&timelabel.y=10&num=5&delay=50") do |f|
  img_content = f.read
  begin
    fpath = "/tmp/wunderground_#{rand(100000)}.gif"
  end while File.exist? fpath
  nf = File.new(fpath,"w")
  trap("EXIT") { File.unlink(fpath); exit }
  nf.write(img_content)
  nf.close
  `open -a /Applications/Safari.app "#{fpath}"`
  sleep 3
end