Enabling SSL certificate on Mongo using Mongoose and Express - node.js

Question

I can't figure out how to add an SSL certificate to my server.js so I can access my API on the server through https.
var express = require('express'),
cors = require('cors'),
app = express(),
port = process.env.PORT || 3000,
mongoose = require('mongoose'),
Task = require('./api/models/todoListModel'), //created model loading here
bodyParser = require('body-parser'),
helmet = require('helmet');
// Test SSL connection
var MongoClient = require('mongodb').MongoClient;
// mongoose instance connection url connection
mongoose.Promise = global.Promise;
mongoose.connect('mongodb://localhost/Tododb'); // was tododb
app.use(bodyParser.urlencoded({ extended: true }));
app.use(bodyParser.json());
// adding Helmet to enhance your API's security
app.use(helmet());
// enabling CORS for all requests
app.use(cors());
app.get('/', (req, res) => res.send('Hello World!'))
var routes = require('./api/routes/todoListRoutes'); //importing route
routes(app); //register the route
app.listen(port);
console.log('Supporter RESTful API server started on: ' + port);
I have tried mongoose.connect('mongodb://localhost/Tododb&ssl=true'); but I don't really know what to do after that? I understand I have to add a reference to the key and certificate files that I have generated but I can't figure how I add those to the connection string.
I have been attempting to follow some of this https://docs.mongodb.com/manual/reference/connection-string/
What's the next step?

Answer 1

The next step is to provide ConnectionOptions to the mongoose.connect call. The mongoose documentation (at https://mongoosejs.com/docs/connections.html#options) specifies that it will pass on ssl specific options to the underlying MongoClient. The options for the MongoClient can be found at: http://mongodb.github.io/node-mongodb-native/2.2/api/MongoClient.html#connect
The ones you are interrested in are likely sslCert, sslKey, and maybe sslPass (along with some more of the ssl* settings). Note that the ones I listed here might require you to load in a file in code yourself. You might be able to use something like:
var fs = require('fs');
var options = {
...
sslCert: fs.readFileSync(path.join(__dirname, <relative path to the cert>))
};
mongoose.connect('mongodb://localhost/Tododb', options);