Quick hack to fix it:

#!/usr/bin/perl -w
use strict;
use Data::Dumper;

my %alllines;            # hash: line => (arbitrary value)
my @enabled_lines;        # array: flat list

while (<DATA>) {
    next if /^\s*#/; # may as well skip commented out lines
    chomp;

    # not testing with defined as '0' couldn't be a valid url.

    my ($data) = /([^\s#]+)/;                    # this
    $alllines{$data} = 1 if $data;                    # works

    my ($enabled) = /([^#]+)#/;                    # this
    push @enabled_lines, trim($enabled) if $enabled;            # does
+n't work
}

print Dumper(\%alllines);
print Dumper(\@enabled_lines);

sub trim {
    $_ = shift;
    s/^\s+//;
    s/\s+$//;
    return $_;
}
__DATA__
astandardline

#acommentedoutline
 # alinewithspacesbeforeandafterthecommentcharacter
therealdata            # a subordinate comment, this contains whitespa
+ce as it should be ignored
    linewherethetabsshouldbeignored
alinewith        # multiple    # comment    # characters
[download]

Basically, I skip lines that start with comments and no data. I also assume that all sharps (#) in URIs will be encoded as %23. That's the only reason why the $enable regex works. Also, rather than try to complicate that regex, I created an easy to read trim() function to deal with the excess white space.

Cheers,
Ovid

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