express.js 4 and sockets with express router

Question

I\'m trying to create a really simple node API using express.js 4 but I need a few \'realtime\' events for which I added socket.io. I\'m fairly new to both so I\'m likely m

Answer 1

One more option is to use req.app.

app.js

const express = require('express');
const path = require('path');
const logger = require('morgan');
const api = require('./routes/api');

const app = express();
const io = require('socket.io').listen(app.listen(3000));

// Keep the io instance
app.io = io;

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

// ...

app.use('/api', api);

module.exports = app;

routes/api.js

const express = require('express');
const router = express.Router();

router.put('/foo', function(req, res) {
    /*
     * API
     */

    // Broadcast the updated foo..
    req.app.io.sockets.emit('update', foo);
});

module.exports = router;