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#!/usr/bin/perl

##########################################################################
# pullrbllists - A script that pulls down lists that can be used with RBLD
# Copyright 2006, Bluehost, Inc.
#
# Authors and Contributers:
#
# Spencer Candland  <spencer@bluehost.com>
# Cade Ekblad-Frank <cade@bluehost.com>
# Robert Lawrence   <robert@bluehost.com>
# Jacob Bushman     <jacob@bluehost.com>
# Ryan Chaudhry     <rchaudhry@bluehost.com>
# Erick Cantwell    <erick@bluehost.com>
#
# http://www.bluehost.com
# https://github.com/bluehost/rbld
#
##########################################################################
#
# This file is part of rbld
#
# Rbld is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA02111-1307, USA.
#
##########################################################################

use strict;
use warnings;

use Getopt::Long;
use Data::Dumper;
use LWP::Simple;
use LWP::UserAgent;
use HTTP::Request::Common qw(GET);
use Proc::PID::File;
use File::Basename;
use File::Copy;
use YAML::Syck qw(LoadFile);

my $skip_sleep  = 0;
my $config_file = '/etc/rbld.d/pullrbllists.yml';
my $list        = {};
my $settings    = {};
my $pidpath;
my $home_dir;
my $listtype;
my $list_path;

# Get cli options
GetOptions (
    's|skip'        => \$skip_sleep,
    'c|config=s'    => \$config_file,
    'l|listpath=s'  => \$list_path,
    'd|homedir=s'   => \$home_dir,
    'r|pid=s'       => \$pidpath,
    't|type=s'      => \$listtype,
    'h|help'        => \&help,
) || &help;

# Read the configuration file
$settings = LoadFile($config_file);

# Merge configuration file with cli options
# cli options always win
if ($list_path) {
    $settings->{list_path} = $list_path;
}

if ($home_dir) {
    $settings->{home_dir} = $home_dir;
}

if ($pidpath) {
    $settings->{pid} = $pidpath;
}

# Validate that we have settings that we need
_validate_settings($settings);

# See if we can continue to run
my($pidfile, $piddir) = fileparse($settings->{pid});
exit 1 if Proc::PID::File->running(dir => $piddir, name => $pidfile);

# Delay requests to rbl list server to keep from overwhelming it
sleep int(rand(120)) unless ($skip_sleep);

# Loop through all of the lists and hopefully download them successfully
foreach my $ipurl (keys %{$settings->{lists}}) {
    if ($listtype) {
        unless ($settings->{lists}{$ipurl}{type} eq $listtype) {
            next;
        }
    }

my $url        = $settings->{lists}{$ipurl}{url};
    my $local_file = $settings->{lists}{$ipurl}{local_file};
    my $savepath   = "$settings->{list_path}/$local_file";

# See if we need to do basic authentication
    if ($settings->{lists}{$ipurl}{username}) {
        my $ua = LWP::UserAgent->new();
        my $req = GET "$url";
        $req->authorization_basic("$settings->{lists}{$ipurl}{username}", "$settings->{lists}{$ipurl}{password}");
        my $response = $ua->request($req);
        my $rc       = $response->code;
        if ($rc == 200) {
            my $body     = $response->content;
            open(TEMP, '>', "$savepath.temp");
            print TEMP $body;
            close(TEMP);
        } else {
            next;
        }
    } else {
        my $rc = getstore($url, "$savepath.temp");
        if ($rc != 200) {
            print STDERR "Could not download $url: Recieved $rc status\n";
            next;
        }
    }
    next if -z "$savepath.temp";
    move("$savepath.temp","$savepath") or ((print STDERR "Could not move file: $!\n") && (next));
}

# Help me
sub help {
  print <<EOF;

$0: Use this script to pull down preconfigured lists that can be used with rbld

usage:
        -s|--skip       Skip Random Sleep
        -c|--config     Path to configuration file (default is /etc/rbld.d/pullrbllists.yml)
        -l|--listpath   Final path to where lists should end up after being downloaded
        -d|--homedir    ENV HOME to use when looking for .wgetrc
        -r|--pid        Pidfile
        -t|--type       Only download lists of certain type
        -h|--help       Help
EOF
  exit;
}

# Method to handle configuration settings validation
sub _validate_settings {
    my $params = shift;

my @neededVals = qw(list_path home_dir pid);
    for my $val (@neededVals) {
        if ($params->{$val}) {
            chomp($params->{$val});
            next;
        } else {
            print STDERR "$val not present, not safe to proceed\n";
            exit 1;
        }
    }

# Make sure that we have lists
    unless ($params->{lists}) {
        print STDERR "No lists to download, not safe to proceed\n";
        exit 1;
    }
}