bodyParser doesn't seems to work

Question

Sorry if this question may sounds \"simple\", but I can\'t get body-parser to work on this very simple example :

\"use strict\";

const PORT = 3000;         


        

Answer 1

You're installing bodyparser as middleware after the route definition. Generally you want to define pre-route middlewares before the routes or separate routes out to different files.

Simply re-arrange your code as follows:

'use strict'

const PORT = 3000
const express = require('express')
const bodyParser = require('body-parser')
const app = express()

app.use(bodyParser.json()) // note: this is before the route

app.post('/api/login', (req, res) => {
  console.log(req.body)
  if (!req.body) return res.sendStatus(400)
  res.send('welcome, ' + req.body.username)
})

app.use(express.json())

console.log(`Listen on port ${PORT}`)
app.listen(PORT)

If you wish to use bodyparser in a separate file as a middleware, the common use is as follows:

routes/someroute.js

const bodyParser = require('body-parser')
const jsonParser = bodyParser.json()

module.exports = (app) => {

  app.post('/a/route', jsonParser, (req,res) => {
      ...
  })

}