#!/usr/bin/perl -w

#
#Simple perl script to parse pastebin to alert on keywords of interest. 
#1)Install the the LWP and MIME perl modules
#2)Create two text files one called keywords.txt and tracker.txt
#2a)keywords.txt is where you need to enter keywords you wish to be alerted on, one per line.
#3)Edit the code below and enter your smtp server, from email address and to email address. 
#4)Cron it up and receive alerts in near real time
#


use LWP::Simple;
use LWP::UserAgent;
use MIME::Lite;
MIME::Lite->send('smtp','#enter_email_server_here', Timeout=>60);

my $ua = new LWP::UserAgent;
$ua->agent("Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1");

my $req = new HTTP::Request GET => 'http://pastebin.com/archive';
my $res = $ua->request($req);
my $pastebin = $res->content;

#date
my ($sec,$min,$hour,$mday,$mon,$year,$wday,$yday,$isdst) = localtime(time);
my $datestring = sprintf("%4d-%02d-%02d",($year + 1900),($mon+1),$mday-1);
my $dir = sprintf("%4d-%02d",($year + 1900),($mon+1));

#
open (MYFILE, 'keywords.txt');
my @keywords = <MYFILE>;
chomp(@keywords) ;
my $regex = join('|', @keywords);



my $tracking_file = 'tracker.txt';

my @links = getlinks();

if (@links) {
        foreach $line (@links){
                if  (checkurl($line) == 0){
                my $request = "http://pastebin.com/$line\n";
                my $link = $line;
                my $req = new HTTP::Request GET => "$request";
                my $res = $ua->request($req);
                my $content = $res->content;
                my @data = $content;
                foreach $line (@data){
                        if ($content =~ m/\<textarea.*?\)\"\>(.*?)\<\/textarea\>/sgm){
                        @data = $1;
                        foreach $line (@data){
                                if ($line =~ m/($regex)$/i){
                                storeurl($link);
                                print "$request $line\n";
                                my $msg = MIME::Lite->new(
                                        From    => '#enter from address',
                                        To      => '#enter to address;',
                                        Cc      => '',
                                        Subject => "Keyword Detected ($1) $request",
                                        Type    => 'multipart/mixed',
                                        Data     =>"",
                                        );
                                $msg->attach(
                                        Type     => 'TEXT',
                                        Data     => "\n\n$line\n\n",
                                        );
                                        $msg->send;
                                                }
                                        }
                                }
                        }
                }
        }
}


sub getlinks{
    my @results;
    if (defined $pastebin) {
        @data = $pastebin;
        foreach $line (@data){
            while ($line =~ m/\"icon\"\>\<a\shref\=\"\/(.*?)"\>/g){
                my $url = $1;
                push (@results, $url);
                        }
                }
        }

  return @results;
}

sub storeurl {
        my $url = shift;
        open (FILE,">> $tracking_file") or die("cannot open $tracking_file");
        print FILE $url."\n";
        close FILE;
}

sub checkurl {
        my $url = shift;
        open (FILE,"< $tracking_file") or die("cannot open $tracking_file");
        foreach my $line ( <FILE> ) {
                if ( $line =~ m/$url/i ) {
                        return 1;
                }
        }
        return 0;
}