qbwc_controller.rb

class QbwcController < ApplicationController
  session :off

  def api
    # respond successfully to a GET which some versions of the Web Connector send to verify the url
    if request.get?
      render :nothing => true
      return
    end
    
    # Examine raw post and determine which API call to process
    payload = Hpricot.uxs(request.raw_post)
    doc = Hpricot.XML(payload)
    api_call = doc.containers[0].containers[0].containers[0].name
  
    # process logic
    case api_call
    when 'serverVersion'
    when 'clientVersion'
    when 'authenticate'
      @token, @message = QbwcSupervisor.authenticate(doc)
    when 'sendRequestXML'
      @qbxml = QbwcSupervisor.sendRequestXML(doc)
    when 'receiveResponseXML'
      @result = QbwcSupervisor.receiveResponseXML(doc)
    when 'getLastError'
      @message = 'An error occurred'
    when 'connectionError'
      @message = 'done'
    when 'closeConnection'
      @message = QbwcSupervisor.closeConnection(doc)
    else
      ''
    end
    
    # render appropriate template
    render :template => "qbwc/#{api_call}.erb", :layout => false, :content_type => 'text/xml'
  end
end

qbwc_supervisor.rb

module QbwcSupervisor
  extend self
  
  def authenticate(doc)
    [ 'ticket', '' ]
  end
  
  def sendRequestXML(doc)
    <<-XML
    <?xml version="1.0" ?>
    <?qbxml version="5.0" ?>
    <QBXML>
      <QBXMLMsgsRq onError="continueOnError">
        <CustomerQueryRq requestID="1">
          <MaxReturned>10</MaxReturned>
          <IncludeRetElement>Name</IncludeRetElement>
        </CustomerQueryRq>
      </QBXMLMsgsRq>
    </QBXML>
    XML
  end

  def receiveResponseXML(doc)
    doc.search('CustomerRet').each do |node|
      puts "Customer: #{node.innerText.strip}"
    end
    100
  end

  def closeConnection(doc)
    'OK'
  end
end