In Node/Express, how to fetch the current route handler? - node.js

Question

How do I fetch the syntax/name of the current route handler, ignoring the current specific param values?
e.g.:
app.get('/users/:id', (req, res) => {
let route = ?
console.log(route) // --> "/users/:id"
})
(Question 2 - can I do this in a middleware function?)

Answer 1

The correct answer is req.route.path
e.g.
1. Call directly from main file (app.js / index.js):
app.get('/admin/:foo/:bar/:baz', async (req, res) => {
console.log(req.originalUrl);
console.log(req.url);
console.log(req.path);
console.log(req.route.path); // this one is your answer
console.log(req.baseUrl);
console.log(req.hostname);
res.sendStatus(200);
});
API call:
http://localhost:3000/admin/a/b/c
Output
/admin/a/b/c (originalUrl)
/admin/a/b/c (url)
/admin/a/b/c (path)
/admin/:foo/:bar/:baz (route.path)
<nothing> (baseUrl)
localhost (hostname)
2. Call from a module:
app.js
const express = require('express');
const app = express();
...
const users = require('./users');
app.use('/api/users', users);
users.js
const express = require('express');
const router = express.Router();
...
router.get('/admin/:foo/:bar/:baz', async (req, res) => {
console.log(req.originalUrl);
console.log(req.url);
console.log(req.path);
console.log(req.route.path); // this one is your answer
console.log(req.baseUrl);
console.log(req.hostname);
res.sendStatus(200);
});
API call:
http://localhost:3000/api/users/admin/a/b/c
Output
/api/users/admin/a/b/c (originalUrl)
/admin/a/b/c (url)
/admin/a/b/c (path)
/admin/:foo/:bar/:baz (route.path)
/api/users (baseUrl)
localhost (hostname)

Answer 2

You can see below example for information about req object that you get.
/users can be obtained from req.baseUrl and :id can be obtained from req.params.id
app.use('/admin', function (req, res, next) { // GET 'http://www.example.com/admin/new?a=b'
console.dir(req.originalUrl) // '/admin/new?a=b' (WARNING: beware query string)
console.dir(req.baseUrl) // '/admin'
console.dir(req.path) // '/new'
console.dir(req.baseUrl + req.path) // '/admin/new' (full path without query string)
next()
})