CODEWITHSUNDEEP
node.jsexpress
Jon Sud
Jon Sud

Reputation: 11641

It is possible to have two apps running on the same port with expressjs?

It is possible to have two apps running on the same port with expressjs?

node app1.js:

const app = express();

app.get('/api/v1/foo', (req, res) => { res.json(...); });

express.listen(3000);

node app2.js:

const app = express();

app.get('/api/v1/bar', (req, res) => { res.json(...); });

express.listen(3000);

The endpoints are not collapse. But node say "the port in use".

Is it possible?

Upvotes: 1

Views: 1046

Answers (3)

Titan XP
Titan XP

Reputation: 409

The answer from @Lalaluka is correct. I think the other way that you can run 2 apps in same port 3000, is by running 1 app using your IP address and the other one using localhost

app.listen(3000, "IP address") // http://ipaddress:3000/ for node app1.js
app.listen(3000) // http://localhost:3000/ for node app2.js

But only the app with IP address can be accessed in the network. Hope it helps. Thanks

Upvotes: 0

Felix G
Felix G

Reputation: 861

In addition to the correct reply from @Lalaluka:

If you want to run two applications on the same port and cannot put them in the same application for whatever reason, you can use a reverse proxy like NGINX. A reverse proxy is a server that sits in front of your web server (occupying the port) and directs traffic to the appropriate application.

https://docs.nginx.com/nginx/admin-guide/web-server/reverse-proxy/

Upvotes: 0

Lalaluka
Lalaluka

Reputation: 1015

You can put both in the same application like this:

const app = express();

app.get('/api/v1/bar', (req, res) => { res.json(...); });
app.get('/api/v1/foo', (req, res) => { res.json(...); });

express.listen(3000);

But you will not be able to run two applications on the same port. That's just how ports work.

Upvotes: 2

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