Should anyone ask, I prefer my neighbours to see up-side down images.

It’s the silly season here and I noticed I had a couple more people using my wireless access points to check their email and surf the web. Since all traffic goes through a transparent proxy on my network I decided to have a little fun with the redirect_program directive in my squid.conf configuration file. I set it to:

redirect_program /home/simon/bin/redirect.pl

and then added the following to redirect.pl:

#!/usr/bin/perl
$|=1;
$count = 0;
$pid = $$;
while () {
chomp $_;
if ($_ =~ /(.*.jpg)/i) {
$url = $1;
system("/usr/bin/wget", "-q", "-O","/var/web/www.imaginator.com/squid/$pid-$count.jpg", "$url");
system("/usr/bin/mogrify", "-flip","/var/web/www.imaginator.com/squid/$pid-$count.jpg");
system("/bin/chmod", "a+r","/var/web/www.imaginator.com/squid/$pid-$count.jpg");
print "http://www.imaginator.com/squid/$pid-$count.jpgn";
}
elsif ($_ =~ /(.*.gif)/i) {
$url = $1;
system("/usr/bin/wget", "-q", "-O","/var/web/www.imaginator.com/squid/$pid-$count.gif", "$url");
system("/usr/bin/mogrify", "-flip","/var/web/www.imaginator.com/squid/$pid-$count.gif");
system("/bin/chmod", "a+r", "/var/web/www.imaginator.com/squid/$pid-$count.gif");
print "http://www.imaginator.com/squid/$pid-$count.gifn";
}
elsif ($_ =~ /(.*.png)/i) {
$url = $1;
system("/usr/bin/wget", "-q", "-O","/var/web/www.imaginator.com/squid/$pid-$count.png", "$url");
system("/usr/bin/mogrify", "-flip","/var/web/www.imaginator.com/squid/$pid-$count.png");
system("/bin/chmod", "a+r", "/var/web/www.imaginator.com/squid/$pid-$count.png");
print "http://www.imaginator.com/squid/$pid-$count.pngn";
}
else {
print "$_n";;
}
$count++;
}

Resulting in:

and an evil laugh.