eprescription generating url

def gen_url
    patient = Patient.find_by(:id => params[:patient_id])
    doctor = patient.user
    client = Savon.client(wsdl: 'https://test.mdtoolboxrx.net/rxws/rx.asmx?wsdl')
    hash = patient.hash_for_mdtoolbox
    hook_url = CGI::escape("#{ENV['BACKEND_SERVER']}api/eprescriptions/capture.json?patient_id=#{patient.id}")
    r = client.call(:update_data_for_screens, hash)
    r = r.body
    code = r[:update_data_for_screens_response][:update_data_for_screens_result]
    url = "https://test.mdtoolboxrx.net/rxtest/access1.aspx?code=#{code}&aid=5182&sid=#{doctor.practice.id}&user=#{doctor.email}&theme=blue&did=#{doctor.id}&page=rx&pid=#{patient.id}&post=#{hook_url}"
    render :json => {:url => url, :r => r}
  end