Storing the file signatures should be easy to add, as I will
most likely add a stringification routine to the File::Signature
class; retrieving the signatures from a file would then mean parsing
the file back in - something which would get nasty with weird filenames -
here, either a small DBMS or a tied DB would be necessary to store the data,
not nice, but feasible.
Getting the difference between two signatures does not
always have a meaning, for example the difference between
two MD5 checksums. I could add the method to always
store the timestamps, but timestamps are not always
something you want to rely on - I'm thinking about NFS mounts
with jumping clock times. A method to tell the time since the
last update to the file-database is a responsibility of the
main program and not of the module.
perl -MHTTP::Daemon -MHTTP::Response -MLWP::Simple -e ' ; # The
$d = new HTTP::Daemon and fork and getprint $d->url and exit;#spider
($c = $d->accept())->get_request(); $c->send_response( new #in the
HTTP::Response(200,$_,$_,qq(Just another Perl hacker\n))); ' # web
