CODEWITHSUNDEEP
node.jsexpress
Allen Haley
Allen Haley

Reputation: 657

Get client domain name from request in node.js & express.js on backend

I'd like to get a client's host domain on backend side. e.g.

On frontend side, send api request to backend using ajax.

$.get('http://localhost:4000/auth');

On backend side, I did like this.

// routes/auth.js

router.get('/', (req, res) => {
  console.log(req.headers.host);
...
});
...
module.exports = router;

this is my app.js in backend.

const express = require('express');
const app = express();
const authRoutes = require('./routes/auth.js');
...
app.use(bodyParser.json());
app.use(passport.initialize());
app.use(passport.session());
app.use('/auth', authRoutes);
...

Expected result:

localhost:3000

Current result:

localhost:4000

It shows backend url.

When I did console.log(req.headers), it's the following.

{ 'user-agent': 'PostmanRuntime/7.17.1',
  accept: '*/*',
  'cache-control': 'no-cache',
  'postman-token': '5eb5791e-3a5a-4285-83c9-33320d935a2e',
  host: 'localhost:4000',
  'accept-encoding': 'gzip, deflate',
  cookie:
   'connect.sid=s%3A5DIRzqn5HVL3vra410YJ6I56uo9qIj2M.6OWL8rKr1peEMz60sakejaeJJNgv5LQFUKypA6cCXLQ',
  connection: 'keep-alive' }

{ host: 'localhost:4000',
  accept: '*/*',
  'content-type': 'application/json' }

Is there something I did wrong? Please someone help me.

Upvotes: 1

Views: 2377

Answers (2)

tjarbo
tjarbo

Reputation: 946

It is not possible to receive the clients current URL as this is not inlcuded by default in the request header. The host header is pointing the target domain the request is intended for and not the current URL of the client application.

Instead, you need to add the current URL, also here called window.location to your request by defining a custom header:

// please be aware, that according to the documentation, you cannot use `$.get(...)` here. Use https://api.jquery.com/jQuery.ajax/ instead.
$.ajax({
    url: "http://localhost:4000/auth",
    headers: {"X-Window-Location": window.location}
});

And on the backend side:

router.get('/', (req, res) => {
  console.log(req.headers['X-Window-Location']);
...
});

Upvotes: 0

Sudhakar Ramasamy
Sudhakar Ramasamy

Reputation: 1759

create a custom header 'xyz' or any name of your choice and assign the url in client side while sending the request. In server access it like req.get('xyz').

with already available stuff, I wasn't able to get port.

req.protocol + '://' + req.host + req.originalUrl

Upvotes: 1

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