downloads Popular Photos from 500px

500px.pl

#!/usr/bin/env perl
#
# 500px.pl - downloads Popular Photos from 500px
#
# Downloads 20 popular photos from 500px.com.
#
# Seungwon Jeong <[email protected]>
#
# Copyright (C) 2012 by Seungwon Jeong
#
# This program 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 3 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, see
# <http://www.gnu.org/licenses/>.

use perl5i::2;

use XML::LibXML;

use IO::All;

use Readonly;

my $doc
    = XML::LibXML->load_xml( location => 'http://feed.500px.com/500px-best' );

Readonly my $XML_FORMAT_ERROR_MESSAGE => 'XML file format error';

my @descriptions = $doc->findnodes('//item/description/text()');
Readonly my $NUM_ITEMS => 20;
die $XML_FORMAT_ERROR_MESSAGE if @descriptions != $NUM_ITEMS;

my $num = 1;
for my $description (@descriptions) {
    die $XML_FORMAT_ERROR_MESSAGE
        if $description !~ /img src="(?<image>.+?)"/;

    io( $LAST_PAREN_MATCH{image} ) > io( $num++ );
}