server.js

var express = require('express');
var moment = require('moment');
var mongoose = require('mongoose');

// Constants
var PORT = 80;

// App
var app = express();


var port = process.env.MONGODB_PORT_27017_TCP_PORT;
var addr = process.env.MONGODB_PORT_27017_TCP_ADDR;
var instance = process.env.MONGODB_INSTANCE_NAME;
var password = process.env.MONGODB_PASSWORD;
var username = process.env.MONGODB_USERNAME;

// 'mongodb://user:pass@localhost:port/database'
mongoose.connect('mongodb://' + username + ':' + password +'@' + addr + ':' + port + '/' + instance);
var Records = mongoose.model('Records', { name: {type: String, default:'any'}, time: {type: Date, default: Date.now} });

app.get('/', function (req, res) {
  //res.send('Hello world\n');

  var record = new Records({ name: req.ip });
  record.save(function (err) {
    if (err) {
      console.log(err)
    } else {
      console.log('save');
    }
  });
  Records.find(function (err, docs) {
    if(err) {
      console.log(err);
    } else {
      var out = '<table border="1" align="center" width="50%"> <thead> <tr> <th> IP </th>  <th> time </th></tr></thead> <tbody> ';
      for (var i = 0,l = docs.length; i < l; i++){
        out = out + '<tr> <th>' + docs[i].name + '</th> <th>' + moment(docs[i].date).format() + '</th></tr>';
      }
      out = out + '</tbody> </table>'
      res.send(out);
    }
  });

});

app.get('/drop', function (req, res) {
  Records.remove({}, function(err) {
    if(err) {
      console.log(err);
      res.send('drop collection Records failed');
    } else {
      res.send('drop collection Records success');
      console.log('drop collection Records success');
    }
  });
});

app.listen(PORT);
console.log('Running on http://localhost:' + PORT);