Ruby Instagram Fetcher

instagram_fetcher.rb

require "rubygems"
require "json"
require "uri"
require "net/https"

class JSONError < StandardError; end

class InstagramFetcher

  ROOT_CA = "/etc/ssl/certs"
  HOST = "https://api.instagram.com/v1/users/self/media/recent?access_token="

  attr_reader :response

  def initialize
    @access_tokens = {
      :user1 => "101653xxxxxxxxxxxx.xxxxxxxxde40bf46df",
      :user2 => "109879xxxxxxxxxxxx.xxxxxxxxc865e5f975"
    }
  end
  
  def execute
    access_tokens.each do |name, token|
      response = fetch(token)
      begin
        json_response = response.body.to_json
        (`echo $HOME` =~ /dev_environment/) ? working_dir = '' : working_dir = '/home/user/production_env/instagram/'
        File.open("#{working_dir}#{name}_json.js", "w") do |f|
          f.write(json_response.strip)
        end
      rescue JSONError => e
        File.open("error_log", "w") do |f|
          f.write("#{Time.now} #{e.message}")
        end
      end
    end
  end

  def fetch(token)
    url = URI.parse "#{HOST}#{token}"
    http = Net::HTTP.new(url.host, url.port)
    http.use_ssl = (url.scheme == 'https')

    if File.directory? ROOT_CA
        http.ca_path = ROOT_CA
        http.verify_mode = OpenSSL::SSL::VERIFY_PEER
        http.verify_depth = 5
    else
        http.verify_mode = OpenSSL::SSL::VERIFY_NONE
    end
    request = Net::HTTP::Get.new("#{url.path}?#{url.query}")
    #request.basic_auth url.user, url.password
    http.request(request)
  end
  
  private

  attr_reader :access_tokens
end

i = InstagramFetcher.new
i.execute