I got this script off the internet for scraping ebay and sending the results to an email addy. Every time I run the script I get the error "use of unitialized hash value".

This is in reference to the %data hash. I've tried playing around with it, but I can't seem to figure out what's wrong.

Here's the code:

use strict;
use LWP 5.64;
use URI;
use HTML::LinkExtor;
use HTML::HeadParser;
use Net::SMTP;
use MIME::Lite;

# Set too your country e.g. ebaycom.au
my $country = ".com";

my $base = "http://search.ebay".$country."/ws/search/SaleSearch";

# Title to search for
my $title = "learning perl";

# Catergory to search get from http://listings.ebay.co.uk
my $cat = "267"; #Books

#your email address
my $email = qw/emailaddy/;

#your mail server
my $mailsrv = qw/mailserver/;


# File to keep items number already seen
my $localfile = "listing.txt";

# declare some vars
my ($a,$b,$line, $itemnumber,@title,$results,%data,%olditems,$key);

#Set hash to nothing
%data = ();

my $browser = LWP::UserAgent->new;
# Un comment if you need to use a proxy - replace with real address an
+d port
#$browser->proxy(['http', 'ftp'], 'http://10.111.10.11:8080/');
my $url =URI->new($base);

$url->query_form(
    'satitle'=> $title,
    'sacat'=> $cat
    );

# set up the link handler sub
my $link_extor = HTML::LinkExtor->new(\&handle_links);

#get search results
my $response = $browser->get($url);

#get the links
$link_extor->parse($response->content);

#get items already seen in hash %olditems
%olditems=();
if (-s $localfile)
    {

    open (INFILE,"$localfile");
      while (<INFILE> )
        {
        chomp;
          next if $_ eq "";
        $olditems{$_}=1;
          }
    close (INFILE);
    }

# delete items from %data hash already seen
foreach $key (keys %olditems)
            {
            if (exists($data{$key}))
                {
                delete $data{$key};
                }
            }


# *** save any remaining new entries to file ***
open (OUTFILE,">>$localfile");
my $mailbody="";

  foreach $itemnumber (keys %data)
    {
    my $line=&get_title($data{$itemnumber});
    print OUTFILE $itemnumber."\n";
    #print "Line=".$line."\n";
    $mailbody=$mailbody.$line;
        }
close (OUTFILE);

#send mail
my $msg = MIME::Lite->new
        (
                  To      => $email,
                      From    => $email,
                  Subject =>"Ebay Search for [".$title."]",
                  Type    =>'multipart/related'
        );

            $msg->attach(Type => 'text/html', Data => qq{ $mailbody }
                 );

    MIME::Lite->send('smtp', $mailsrv, Timeout=>60);

    $msg->send if $mailbody ne "";


######################################
sub handle_links
{

    my ($tag, %links)=@_;
    my $key;
        if ($tag eq 'a')
            {
            foreach $key (keys %links)
                {
            #search for links with Viewitem
                if ($key eq 'href')
                    {
                    if ( $links{$key} =~ m/ViewItem/)
                        {
                        #get the item number from the link
                        $links{$key} =~ m/item=(\d+)/;

                        $data{$1}=$links{$key};
                        }
                    }
                }
            }
}

sub get_title($)
{

      my ($page)=@_;
    my $itempage = LWP::UserAgent->new;
      my $item_contents=$itempage->get($page);


     my $p = HTML::HeadParser->new;
     $p->parse($item_contents->content);
       my $link="<p><a href=\"$page\">".$p->header('Title')."</p>";
    return $link;


}
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