Tf2Stats is a log file parser for Team Fortress 2, very similiar to http://tf2logs.com (checkout the website and barncow/tf2logparser.
It reads log files from competitive matches (mp_tournament 1) and extracts it's various information (kills, deaths, caps, heals, damages) in a much more accessible manner. To receive all mentioned stats, you have to install either tf2log's Supplemental Stats Plugin (SourceMod plugin) or Anakin's TFTrue (standalone) on your gameserver.
Add this line to your application's Gemfile:
gem 'tf2stats'
And then execute:
$ bundle
Or install it yourself as:
$ gem install tf2stats