Get Steam player details, recently played games

steam.rb

#!/usr/bin/env ruby
# encoding: utf-8
require 'rubygems'
require 'json'
require 'open-uri'

class SteamAPI
  attr_reader :api_key, :user_id, :api_url

  def initialize api_key, user_id, api_url=nil
    @api_key = api_key
    @user_id = user_id
    @api_url = api_url || 'http://api.steampowered.com'
  end

  # https://developer.valvesoftware.com/wiki/Steam_Web_API#GetPlayerSummaries_.28v0002.29
  def get_player_summary
    url = "#@api_url/ISteamUser/GetPlayerSummaries/v0002/" +
          "?key=#@api_key&steamids=#@user_id"
    response = open(url).read
    json = JSON.parse(response)
    json['response']['players'].first
  end

  # https://developer.valvesoftware.com/wiki/Steam_Web_API#GetRecentlyPlayedGames_.28v0001.29
  def get_recently_played_games
    url = "#@api_url/IPlayerService/GetRecentlyPlayedGames/" +
          "v0001/?key=#@api_key&steamid=#@user_id&format=json"
    response = open(url).read
    json = JSON.parse(response)
    games = json['response']['games']
    games.map {|game|
      app_id = game['appid']
      icon_url = game['img_icon_url']
      if icon_url
        game['img_icon_url'] = 'http://media.steampowered.com/' +
                               'steamcommunity/public/images/' +
                               "apps/#{app_id}/#{icon_url}.jpg"
      end
      logo_url = game['img_logo_url']
      if logo_url
        game['img_logo_url'] = 'http://media.steampowered.com/' +
                               'steamcommunity/public/images/' +
                               "apps/#{app_id}/#{logo_url}.jpg"
      end
      game['url'] = "http://store.steampowered.com/app/#{app_id}"
      game
    }
  end
end

def print_json_object obj
  print JSON.generate(obj) + "\r\n"
end

# See http://steamcommunity.com/dev/registerkey
steam_web_api_key = 'your_steam_web_api_key_here'

# Your 64-bit Steam ID--see http://steamidconverter.com/
steam64_id = '76561198025023644' # cheshire137

print "Content-type: application/json\r\n\r\n"
begin
  steam = SteamAPI.new(steam_web_api_key, steam64_id)
  print_json_object({
    player: steam.get_player_summary,
    recent_games: steam.get_recently_played_games
  })
rescue => e
  print_json_object({error: e.message})
end