keepAlive: heartbeat

keepAlive.js

(function(){
  var http = require('http');
  var hostUri = "http://XXX/gw/1.0/heartbeat";
  var interval = 5000;
  var postData = {
    "gw_key": "192.168.2.2",
    "heart-beat": {
      "type": "xxx",
      "totalclients": "12",
      "version":"4,1,1,0"
    }
  };
  var opt = {
    host: 'XXX',
    port: '80',
    path: '/gw/1.0/heartbeat',
    method: 'POST',
    headers: {
        'Content-Type': 'application/json'
    }
  };

  var heartbeat_fail_counter = 0;
  function post(data) {
    opt.headers['Content-Length'] = data.length;
    var req = http.request(opt, function(res) {
      res.setEncoding('utf8');
      res.on('data', function (chunk) {
        console.log('Response: ' + chunk);
      });
    });
    req.setTimeout(1000, function () {
      heartbeat_fail_counter++;
      console.log('WARNING: heartbeat timeout #', heartbeat_fail_counter);
    });
    req.end(data);
  }

  exports = module.exports = function () {
    return setInterval(function () {
      post(JSON.stringify(postData));
    }, interval);
  };
}());

// configure - http://projects.puppetlabs.com/projects/puppet/wiki/Puppet_augeas