Express.js – req.baseUrl Property

Express JSServer Side ProgrammingProgramming

The req.baseUrl property returns the router instance where this URL path is mounted. This property is similar to the mountpath property of the app object, except for the difference that app.mountpath returns the matched path patterns.

Syntax

req.baseUrl

Example 1

Create a file with the name "reqBaseUrl.js" and copy the following code snippet. After creating the file, use the command "node reqBaseUrl.js" to run this code as shown in the example below −

// req.baseUrl Property Demo Example
// Importing the express
var express = require('express');

// Initializing the express and port number
var app = express();

// Initializing the router from express
var router = express.Router();
var PORT = 3000;

// Defining an Endpoint
router.get('/api', function (req, res) {
   console.log(req.baseUrl);
   res.end();
})
app.use('/v1', router);
app.listen(PORT, function(err){
   if (err) console.log(err);
   console.log("Server listening on PORT", PORT);
});

Output

Hit the following Endpoint with a GET request: localhost:3000/v1/api

C:\home
ode>> node reqBaseUrl.js Server listening on PORT 3000 /v1

Example 2

Let's take a look at one more example.

// req.baseUrl Property Demo Example
// Importing the express
var express = require('express');

// Initializing the express and port number
var app = express();

// Initializing the router from express
var router = express.Router();
var PORT = 3000;
app.use('/employee', router);
// Defining an endpoint
router.get('/login', function (req, res) {
   if(req.baseUrl == '/employee') {
      console.log("Show Login Page");
      res.end();
   } else {
      console.log("Invalid Route")
      res.send("Invalid Route")
   }
})
app.use('/v1', router);
app.listen(PORT, function(err){
   if (err) console.log(err);
   console.log("Server listening on PORT", PORT);
});

Output

Hit the following Endpoint with a GET Request: localhost:3000/employee/login

C:\home
ode>> node reqBaseUrl.js Server listening on PORT 3000 Show Login Page
raja
Updated on 06-Apr-2022 08:13:49

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