PesaPal Implementation in Ruby (test)

pesapal.rb

module PesaPal
  require 'active_support'
  include ActiveSupport::Configurable
 
  self.configure do |config|
    config.test_mode       = true
    config.consumer_key    = "<your key>"
    config.consumer_secret = "<your secret>"
  end
  
end
 
class TransactionUrl
    
  require 'oauth'
  require 'uri'
  require 'active_support/core_ext/object/to_query'
    
  attr_reader :post_data_xml, :callback_url, :token, :request_options
  
  HTTP_METHOD = 'get'
  API_ACTION = 'API/PostPesapalDirectOrderV4'
    
  def initialize(post_data_xml, callback_url)
    @post_data_xml   = URI.escape(post_data_xml)
    @callback_url    = callback_url
    @token           = nil
    @request_options = {}
  end
    
  def api_domain
    PesaPal.config[:test_mode] ? 'http://demo.pesapal.com/' : 'https://www.pesapal.com/'
  end
    
  def url
    "#{signed_request.path}&#{joined_params}"
  end
    
  def joined_params
    params.to_query
  end
    
  def consumer
    @consumer ||= begin
      OAuth::Consumer.new(PesaPal.config[:consumer_key], PesaPal.config[:consumer_secret], {
        site: api_domain, 
        scheme: :query_string,
        http_method: HTTP_METHOD,
        signature_method: 'HMAC-SHA1',
        oauth_version: '1.0'
      }
      )
    end
  end
 
  def signed_request
    consumer.create_signed_request(HTTP_METHOD, "#{api_domain}#{API_ACTION}", token, request_options, params)
  end
    
  def params
    @params = { 
      oauth_callback: URI.escape(callback_url),
      pesapal_request_data: post_data_xml,
    }
  end
 
end

XML = %{<?xml version="1.0" encoding="utf-8"?><PesapalDirectOrderInfo xmlns:xsi="http://www.w3.org/2001/XMLSchemainstance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" Amount="1000" Description="DateMe Kenya Subscription" Type="MERCHANT" Reference="asdjfaosidjfoa" FirstName="" LastName="" Email="[email protected]" xmlns="http://www.pesapal.com" />}
puts url = TransactionUrl.new(XML, "http://localhost:3000").url

For all who end up here looking for a solution ... I've started on a rubygem that works. Find it on RubyGems.org (here) and on GitHub (here).