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August 29, 2015 14:10
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Changes IP address CIDRs to varnish vcl regex.
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#!/usr/env/perl | |
use strict; | |
use warnings; | |
use Net::Netmask; | |
use Regexp::Assemble::Compressed; | |
print "Enter the filename to varnishize: "; | |
my $filename = <STDIN>; | |
chomp $filename; | |
exit 0 if ($filename eq "") or (! -e $filename); | |
my @output = (); | |
open (my $fh, '<', $filename) or die "cannot open < $filename : $!"; | |
while (<$fh>) { | |
# Strip it down to just numbers, dots and slashes | |
$_ =~ s/[^0-9.\/]+//g; | |
# Convert CIDRs to Varnish Regex | |
my $block = new2 Net::Netmask ($_); | |
if ($block) { | |
my $first = $block->first(); | |
my $last = $block->last(); | |
my @regex = (); | |
my @firstarray = split(/\./, $first); | |
my @lastarray = split(/\./, $last); | |
foreach my $index (0 .. $#firstarray) { | |
if ($firstarray[$index] == $lastarray[$index]) { | |
push @regex, $firstarray[$index]; | |
} | |
elsif ($firstarray[$index] == 0 && $lastarray[$index] == 255 && $index == 3) { | |
push @regex, "[0-9]+"; | |
} | |
else { | |
# Split the number up into individual arrays to compare each one. | |
if (length($firstarray[$index]) == length($lastarray[$index])) { | |
my @firstsection = split(//, $firstarray[$index]); | |
my @lastsection = split(//, $lastarray[$index]); | |
my @firstclone = @firstsection; | |
my @lastclone = @lastsection; | |
my $ra = Regexp::Assemble::Compressed->new; | |
my $startrange = join('', @firstsection); | |
my $endrange = join('', @lastsection); | |
my @range = $startrange .. $endrange; | |
for my $part (@range) { | |
$ra->add($part); | |
} | |
my $delicious_regex = $ra->re; | |
# Varnish doesn't need the fancy ?^: so we can remove them. | |
$delicious_regex =~ s/[?^:]//g; | |
push @regex, $delicious_regex; | |
} | |
} | |
} | |
my $single_line = join('\.', @regex) . '$'; | |
print "$block => $single_line\n"; | |
push @output, $single_line; | |
} | |
} | |
close $fh; | |
print "-" x 100; | |
print join('|', @output) . "\n"; | |
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