gistfile1.txt

lennart ~/workspace/graylog2/graylog2-web-interface(play)$ curl -XGET 'http://localhost:12900/tools/regex_tester?string=%3C10%3E%2007%20Aug%202013%20somesubsystem%3A%20this%20is%20my%20message%20for%20yo&regex=%5E.*somesubsystem%3A%20(.%2B)&pretty=true' -p0
{
  "regex" : "^.*somesubsystem: (.+)",
  "matched" : true,
  "string" : "<10> 07 Aug 2013 somesubsystem: this is my message for you",
  "match" : {
    "start" : 32,
    "match" : "this is my message for you",
    "end" : 58
  }
}