server.js

const express = require('express');
const app = express();

const path = require('path');
const bodyParser = require('body-parser');

const generateId = require('./lib/generate-id');

var redis = require("redis"),
  client = redis.createClient('6379');

app.use(express.static('static'));
app.use(bodyParser.urlencoded({ extended: true }));

app.set('view engine', 'jade');
app.set('port', process.env.PORT || 3000);

app.locals.title = 'Pizza Express'
app.locals.pizzas = {};

app.get('/', (request, response) => {
  response.render('index');
});

app.post('/pizzas', (request, response) => {
  if (!request.body.pizza) { return response.sendStatus(400); }

  var id = generateId();
  var pizza = request.body.pizza;
  pizza.id = id;

  app.locals.pizzas[id] = pizza;

  response.redirect('/pizzas/' + id);
});

app.get('/pizzas/:id', (request, response) => {
  var pizza = app.locals.pizzas[request.params.id];

  response.render('pizza', { pizza: pizza });
});

if (!module.parent) {
  app.listen(app.get('port'), () => {
    console.log(`${app.locals.title} is running on ${app.get('port')}.`);
    console.log(`putting key 'somekey' with value in redis and getting it: `);

    client.set("somekey", "successful test");
    client.get("somekey", function(err, reply) {
      // reply is null when the key is missing
      console.log(reply);
    });
  });
}

module.exports = app;