The trick is, that as far as it does exactly what I needed, this solution requires web server with PHP... and installing web server (not to mention PHP) is not really what I want on my logserver.
Mojolicious to the rescue!
Mojolicious is a very powerful Perl web framework that comes without bloat (almost unheard of these days!) - all you need is standard Perl interpreter and core Perl modules as they come preinstalled with your Linux distro and you can install Mojolicious - no other dependencies. On Debian systems installation is as simple as
apt-get install libmojolicious-perl
and we're up and running. Writing Mojolicious::Lite app is really simple and the best part is that it comes with it's own, built in web server (operating in several different modes if needed). Sounds like nice way to go - no dedicated web server on the machine, self-contained application, etc. One more thing - writing, testing and deploying the whole code to actual machine took less than 10 minutes!