The html source is created by your client. You can do a couple of things (not involving perl) like:

$ wget -O temp.html 'ftp://ftp.symantec.com/public/english_us_canada/a
+ntivirus_definitions/norton_antivirus_corp/'
[download]

or

$ lynx -source 'ftp://ftp.symantec.com/public/english_us_canada/antivi
+rus_definitions/norton_antivirus_corp/'>temp.html
[download]

and they will create the html source for you.

I tried using lwp-request but it just gave me the unix listing.