caller.rb

require 'net/http'
require 'net/https'
require 'uri'
require 'profile'
require 'utils'
require 'logger'

# The module has a class and a wrapper method wrapping NET:HTTP methods to simplify calling PayPal APIs.

module PayPalSDKCallers
  class Caller
    include PayPalSDKProfiles
    include PayPalSDKUtils
    attr_reader :ssl_strict

    # to make long names shorter for easier access and to improve readability define the following variables
    @@profile = PayPalSDKProfiles::Profile

    # Proxy server information hash
    @@pi=@@profile.proxy_info

    # client information such as version, source hash
    @@ci=@@profile.client_info

    #@@PayPalLog=PayPalSDKUtils::Logger.getLogger('PayPal.log')

    # CTOR
    def initialize(ssl_verify_mode=false)
      @ssl_strict = ssl_verify_mode
      @@profile =PayPalSDKProfiles::Profile.new
    end

    # This method uses HTTP::Net library to talk to PayPal
    # WebServices. This is the method what merchants should mostly care
    # about.
    # It expects an hash arugment which has the method name and
    # paramater values of a particular PayPal API.
    # It assumes and uses the credentials of the merchant which is the
    # attribute value of credentials of profile class in
    # PayPalSDKProfiles module.
    # It assumes and uses the client information which is the
    # attribute value of client_info of profile class of
    # PayPalSDKProfiles module.
    # It will also work behind a proxy server. If the calls need be to
    # made via a proxy sever, set USE_PROXY flag to true and specify
    # proxy server and port information in the profile class.

    def headers
      @@profile.headers
    end

    def config
      @@profile.config
    end

    def call(requesth)
      req_data= "#{hash2cgiString(requesth)}"
      if (@@profile.m_use_proxy)
        #if( @@pi["USER"].nil? || @@pi["PASSWORD"].nil? )
        #  http = Net::HTTP::Proxy(@@pi["ADDRESS"],@@pi["PORT"]).new(@@profile.endpoints["serverURL"], @@pi["PORT"])
        #else
        #  http = Net::HTTP::Proxy(@@pi["ADDRESS"],@@pi["PORT"],@@pi["USER"], @@pi["PASSWORD"]).new(@@profile.endpoints["SERVER"], @@pi["PORT"])
        #end
      else
        http = Net::HTTP.new(@@profile.endpoints["SERVER"],
                             @@profile.endpoints["PORT"])
      end

      http.verify_mode    = OpenSSL::SSL::VERIFY_NONE #unless ssl_strict
      http.use_ssl = true;
      maskedrequest = mask_data(req_data)

      paypallog.info "\n"
      paypallog.info "#{Time.now.strftime("%a %m/%d/%y %H:%M %Z")}- SENT:"
      paypallog.info "#{CGI.unescape(maskedrequest)}"

      contents,unparseddata = http.post2(@@profile.endpoints["SERVICE"],
                                         req_data, headers)
      paypallog.info "\n"
      paypallog.info "#{Time.now.strftime("%a %m/%d/%y %H:%M %Z")}- RECEIVED:"
      paypallog.info "#{CGI.unescape(unparseddata)}"

      data = CGI::parse(unparseddata)
      transaction = Transaction.new(data)
    end

    def paypallog
      self.class.paypallog
    end

    def self.paypallog
      @@PayPalLog ||= Logger.new('log/PayPal.log')
    end
  end


  # Wrapper class to wrap response hash from PayPal as an object and
  # to provide nice helper methods
  class Transaction
    def initialize(data)
     @success = data["responseEnvelope.ack"].to_s != "Failure"
     @response = data
   end
    def success?
      @success
    end
    def response
      @response
    end
  end
end