server.js

// Configuration for express app

var express = require('express'),
  path = require('path'),
  app = express(),
  bodyParser = require('body-parser'),
  server = require('http').Server(app),
  mongoose = require('mongoose');

mongoose.connect('mongodb://localhost/grid');
// Mongoose Schema
var Schema = mongoose.Schema;
var ScoreSchema = new Schema({
  score: Number,
  player: String
}, {
  collection: 'score'
});
// Mongoose Model definition
var User = mongoose.model('score', ScoreSchema);

app.use(bodyParser.urlencoded({
  extended: true
}));
app.use(bodyParser.json());
app.set('views', __dirname + '/views/');
app.set('view engine', 'ejs');
// server static file

app.use(express.static(path.join(__dirname, 'public')));

app.post('/score', function(req, res) {
  var e = {
    score: parseInt(req.body.score, 10),
    player: req.body.player
  };
  var userDoc = new User(e);
  userDoc.save(function(err, result) {
    if (!err) {
      res.json(result);
    } else {
      res.status(404).send('nothing to see here...');
    }
  });
});

app.put('/score/:id', function(req, res) {
  var e = {
    score: req.body.score,
    player: req.body.player
  };

  var userDoc = new User(e);
  userDoc.update({
    _id: req.params.id
  }, function(err) {
    if (!err) {
      res.json(e);
    } else {
      res.status(404).send(err);
    }
  });
});

app.get('/score', function(req, res) {
  User.find(function(err, score) {
    if (err) {
      res.json({
        message: 'no result'
      });
    }
    res.json(score);
  });
});

app.get('/', function(req, res) {
  res.render('index.ejs', {
    message: 'coming from server'
  });
});

module.exports.http = server;