#!/usr/bin/perl

use File::Basename;
use strict;

my @files = (
    'http://server.com/subdir/index.html',
    'http://server.com/subdir/dist.tar.gz',
    'http://server.com/whatever.cgi?testing=1',
    'ftp://server.com/pub/whatever.zip',
    'file://local/subdir/testing.txt',
);


foreach my $file ( @files ){

    my $suffix = ( fileparse( $file, '\..*$' ) )[2];
    $suffix =~ s/(\.?[^.?]*)?\?.*?$/$1/;

    print $suffix, "\n";
}

##</code><code>##

my @valid_extensions = qw/ .tar.gz .html .zip /;

foreach my $file ( @files ){

    my $suffix = ( fileparse( $file, @valid_extensions ) )[2];

    print $suffix, "\n";
}