COOKIES
  Some sites like to play games with cookies.  By default
  LWP ignores cookies provided by the servers it visits.
  LWP will collect cookies and respond to cookie requests
  if you set up a cookie jar.

  use LWP::UserAgent;
  use HTTP::Cookies;

  $ua = LWP::UserAgent->new;
  $ua->cookie_jar(HTTP::Cookies->new(file => "lwpcookies.txt",
                  autosave => 1));

  # and then send requests just as you used to do
  $res = $ua->request(HTTP::Request->new(GET => "http://www.yahoo.no"));
  print $res->status_line, "\n";

  As you visit sites that send you cookies to keep, then
  the file lwpcookies.txt" will grow.