server.js

//  OpenShift sample Node application
var express = require('express'),
    app     = express(),
    morgan  = require('morgan');
    
Object.assign=require('object-assign')

const dataVersion = "0.1";

//app.engine('html', require('ejs').renderFile);
app.use(morgan('combined'))

var port = process.env.PORT || process.env.OPENSHIFT_NODEJS_PORT || 8080,
    ip   = process.env.IP   || process.env.OPENSHIFT_NODEJS_IP || '0.0.0.0'//,
    //mongoURL = process.env.OPENSHIFT_MONGODB_DB_URL || process.env.MONGO_URL,
    //mongoURLLabel = "";

//if (mongoURL == null && process.env.DATABASE_SERVICE_NAME) {
//  var mongoServiceName = process.env.DATABASE_SERVICE_NAME.toUpperCase(),
//      mongoHost = process.env[mongoServiceName + '_SERVICE_HOST'],
//      mongoPort = process.env[mongoServiceName + '_SERVICE_PORT'],
//      mongoDatabase = process.env[mongoServiceName + '_DATABASE'],
//      mongoPassword = process.env[mongoServiceName + '_PASSWORD']
//      mongoUser = process.env[mongoServiceName + '_USER'];
//
//  if (mongoHost && mongoPort && mongoDatabase) {
//    mongoURLLabel = mongoURL = 'mongodb://';
//    if (mongoUser && mongoPassword) {
//      mongoURL += mongoUser + ':' + mongoPassword + '@';
//    }
//    // Provide UI label that excludes user id and pw
//    mongoURLLabel += mongoHost + ':' + mongoPort + '/' + mongoDatabase;
//    mongoURL += mongoHost + ':' +  mongoPort + '/' + mongoDatabase;
//
//  }
//}
//var db = null,
//    dbDetails = new Object();
//
//var initDb = function(callback) {
//  if (mongoURL == null) return;
//
//  var mongodb = require('mongodb');
//  if (mongodb == null) return;
//
//  mongodb.connect(mongoURL, function(err, conn) {
//    if (err) {
//      callback(err);
//      return;
//    }
//
//    db = conn;
//    dbDetails.databaseName = db.databaseName;
//    dbDetails.url = mongoURLLabel;
//    dbDetails.type = 'MongoDB';
//
//    console.log('Connected to MongoDB at: %s', mongoURL);
//  });
//};

app.param('year', function (year) {
	return !isNaN(parseInt(year)) && year >= new Date().getFullYear();
});
app.param('month', function (month) {
	return !isNaN(parseInt(month)) && month >= 1 && month <= 12;
});

var responseOk = function (req, res) {
	res.writeHead(200);
	res.end();
};
app.get('/', responseOk);
app.get('/health', responseOk);

app.get('/:version/:city/:year/:month', function (req, res) {
	var headerJson = JSON.stringify({ v: dataVersion });
	res.send(headerJson);// + "\n" + resultJson);
	return;
});

//app.get('/', function (req, res) {
//  // try to initialize the db on every request if it's not already
//  // initialized.
//  if (!db) {
//    initDb(function(err){});
//  }
//  if (db) {
//    var col = db.collection('counts');
//    // Create a document with request IP and current time of request
//    col.insert({ip: req.ip, date: Date.now()});
//    col.count(function(err, count){
//      res.render('index.html', { pageCountMessage : count, dbInfo: dbDetails });
//    });
//  } else {
//    res.render('index.html', { pageCountMessage : null});
//  }
//});
//
//app.get('/pagecount', function (req, res) {
//  // try to initialize the db on every request if it's not already
//  // initialized.
//  if (!db) {
//    initDb(function(err){});
//  }
//  if (db) {
//    db.collection('counts').count(function(err, count ){
//      res.send('{ pageCount: ' + count + '}');
//    });
//  } else {
//    res.send('{ pageCount: -1 }');
//  }
//});

// error handling
app.use(function(err, req, res, next){
  console.error(err.stack);
  res.status(500).send('Something bad happened!');
});

//initDb(function(err){
//  console.log('Error connecting to Mongo. Message:\n'+err);
//});

app.listen(port, ip);
console.log('Server running on http://%s:%s', ip, port);

module.exports = app ;