middleware.js

var gor = require("goreplay_middleware");
var statsd = require('dogstatsd-node').StatsD,
  client = new statsd();

gor.init();

gor.on("request", function(req) {

  // Don't process healthchecks
  if (gor.httpPath(req.http) != '/ping') {

    let http_host = req.http.toString().match(/^host: (.*)/m)[1].trim();
    let http_method = req.http.toString().match(/^(\w+)/m)[0].trim();
    let http_path = gor.httpPath(req.http).replace(/\?.*/, '').trim();

    let include_verticals = [
      'www.flowrestling.org',
      'www.flocheer.com',
      'www.flograppling.com',
      'www.flocombat.com',
      'www.flotrack.org'
    ];

    if (include_verticals.includes(http_host)) {
      client.increment('goreplay_core.capture', 1).tags([`'http-host:${http_host}'`,`'http-method:${http_method}'`,`'http-route:${http_path}'`]).send();
    }

  }

  // Return nothing - drops all requests from middleware output
})