I installed a simple application with Express.js v4.17.1. I put the all source code to the index.js file:
const express = require('express')
const app = express()
const port = 3000
app.get('/', (req, res) => {
res.send('Hello World!')
})
app.post('/apple', (req, res) => {
console.log(req.body)
res.send('Hello World!')
})
app.listen(port, () => {
console.log(`Example app listening at http://localhost:${port}`)
})
I ran this server and when sent the POST request (with primitive payload) to the /apple endpoint, I got this output:
r.akhromieiev@MacBook-Pro apple-shortcus % node index.js
Example app listening at http://localhost:3000
undefined
This output means that req.body is undefined, but it should contain my payload.
Step 1 : Because we are using Express@4 we need to install the body-parser package:
npm i body-parser --save
Step 2 : Then we need to require it in the index.js:
const bp = require('body-parser')
Step 3 : On this step we need to pass the bp.json() and the bp.urlencoded({ extended: true }) to the application-level middleware:
app.use(bp.json())
app.use(bp.urlencoded({ extended: true }))
These methods will parse the incoming requests and extract the body.
Step 4 : I restarted the app and now my output contained the payload:
r.akhromieiev@MacBook-Pro apple-shortcus % node index.js
Example app listening at http://localhost:3000
{ status: 'Ok' }
const express = require('express')
const bp = require('body-parser')
const app = express()
const port = 3000
app.use(bp.json())
app.use(bp.urlencoded({ extended: true }))
app.get('/', (req, res) => {
res.send('Hello World!')
})
app.post('/apple', (req, res) => {
console.log(req.body)
res.send('Hello World!')
})
app.listen(port, () => {
console.log(`Example app listening at http://localhost:${port}`)
})