#!/usr/bin/perl -w
# 
# redirector: script for retrieving scientific articles
# 
# Copyright (C) 2006, 2007 Hendrik Weimer
# 
# 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 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., 51 Franklin Street, Fifth Floor, Boston, MA
# 02110-1301 USA

use strict;

$|=1;

my @urls = qw(http://scitation\.aip\.org/.*filetype=pdf 
	    http://prola\.aps\.org/pdf/
	    http://www\.iop\.org/EJ/.*pdf
	    http://epubs\.siam\.org/.*pdf
	    http://www\.nature\.com/nature/journal/.*pdf
            http://portal\.acm\.org/ft_gateway.cfm.*type=pdf
            http://www\.sciencemag\.org/cgi/reprint/.*.pdf);

my $httphost = 'localhost';

my ($line, $url);

my $regexp = join '|', @urls;

$regexp =~ s/\//\\\//g;

while ($line = <STDIN>)
{
    $url = (split / /, $line)[0];
    if($line =~ /^$regexp/o)
    {
	$url =~ s/\?/\%3F/g;
	$url =~ s/\&/\%26/g;
	print "http://$httphost/cgi-bin/get-paper?q=$url\n";
    }
    else
    {
	print "\n";
    }
}