DokDok API access with HTTParty

dokdok-httparty.rb

# blog post: http://blog.slashpoundbang.com/post/3230523402/use-the-dokdok-api-from-ruby

require 'base64'
require 'openssl'
require 'httparty'

class DokDok
  include HTTParty
  base_uri 'api.dokdok.com'

  attr_reader :consumer_key, :consumer_secret

  def initialize(consumer_key, consumer_secret)
    @consumer_key    = consumer_key
    @consumer_secret = consumer_secret
  end

  def escape(string)
    # reserved character regexp, per http://oauth.net/core/1.0/#rfc.section.5.1
    URI.escape(string.to_s, /[^a-zA-Z0-9\-\.\_\~]/)
  end

  def get(method, params = {})
    path = "/1.0/#{method}.json"
    uri  = "#{self.class.base_uri}#{path}"

    params.merge!({
      :oauth_consumer_key     => consumer_key,
      :oauth_nonce            => Base64.encode64(OpenSSL::Random.random_bytes(32)).gsub(/\W/, ''), # @see OAuth::Helper.generate_key
      :oauth_signature_method => 'HMAC-SHA1',
      :oauth_timestamp        => Time.now.to_i.to_s,
      :oauth_version          => '1.0',
    })

    # http://oauth.net/core/1.0/#rfc.section.9.1.1
    query_string    = params.sort_by{|x| x[0] }.map{ |k,v| "#{escape(k)}=#{escape(v)}" }.join('&')
    base_string     = ['GET', uri, query_string].map{ |string| escape(string) }.join('&')
    oauth_signature = Base64.encode64(OpenSSL::HMAC.digest('sha1', "#{consumer_secret}&", base_string)).chomp
    self.class.get("#{path}?#{query_string}&oauth_signature=#{escape(oauth_signature)}")
  end
end

# example usage
DokDok.new('CONSUMER_KEY', 'CONSUMER_SECRET').get('imap/discover', :email => 'example@example.com')