A crude log parser for Factorio. Run this within a screen, or use the provided systemd example unit to monitor and parse your factorio log.

The script will output a status.json file containing the connected peers throughout the server sessions lifetime. (the list of peers will be reset every time the server/script is restarted).

While the script itself only provides the information it is up to you to use it in a creative way - for example by presenting the currently online peers on your server status page, or listing the most frequently re-connecting player this session?

The output file presents you with continous parsing result of the servers "current" state. Using this information we can see that since the server started, peer 3 desynced 6 times in short sequence - perhaps a temporary ban is in order? With both peer ip and port at hand you could easily parse this file and adjust your firewall rules to prevent peer 3 from reconnecting for a while.

Example:

{
"generated": "2015-08-13T11:07:24.635245+00:00",
"peers": {
 "1": {
  "connected": "2015-08-13T11:07:20.475868+00:00",
  "desyncs": [],
  "disconnected": "2015-08-13T11:07:20.481195+00:00",
  "online": false,
  "peer_ip": "X.X.X.X",
  "peer_port": 34198,
  "player_index": "0",
  "username": "RandomPlayer"
 },
 "2": {
  "connected": "2015-08-13T11:07:20.476307+00:00",
  "desyncs": [
   "2015-08-13T11:07:20.476866+00:00",
   "2015-08-13T11:07:20.477324+00:00"
  ],
  "disconnected": "2015-08-13T11:07:20.478208+00:00",
  "online": false,
  "peer_ip": "X.X.X.X",
  "peer_port": 51518,
  "player_index": "4",
  "username": "RandomGuy"
 },
 "3": {
  "connected": "2015-08-13T11:07:20.478347+00:00",
  "desyncs": [
   "2015-08-13T11:07:20.478886+00:00",
   "2015-08-13T11:07:20.479342+00:00",
   "2015-08-13T11:07:20.479851+00:00",
   "2015-08-13T11:07:20.480313+00:00",
   "2015-08-13T11:07:20.480766+00:00",
   "2015-08-13T11:07:20.481278+00:00"
  ],
  "disconnected": "2015-08-13T11:07:20.482085+00:00",
  "online": false,
  "peer_ip": "X.X.X.X",
  "peer_port": 34197,
  "player_index": "8",
  "username": "SomeOne"
 }
}
}

The code adheres to Semantic Versioning v2.0.0 http://semver.org/spec/v2.0.0.html A release is denoted by the github release system using git tags.

This code is realeased with the MIT license, see the LICENSE file.