index.js

var circleNotifier = require('./circle');
var SparkStatus = require('./spark');

// later

app.use('/test', function(req,res,next){
  console.log(req);
  var ip = req.headers['x-forwarded-for'] || req.connection.remoteAddress;
  spark.write("Testing from:\n" + ip, function(err, retval){
    res.end(JSON.stringify({err: err, retval: retval}));
  });
  spark.testBacklight();
});