快递请求正文返回 null

Question

I have a problem with express POST request,

const express = require('express')
const app = express()

app.use(express.json())
app.use(express.urlencoded({extended: true}))


app.post('/movie/add', (req, res) => {
  console.log(req.body) // {}

  //
})

can someone tell me, why after sending some data like:

{
    "msg":"Hello"
}

then my req.body return me {} ? He should return me an object of my msg value but instead of I have an empty array:/

thanks for any help!

Answer 1

You need to do two things if you want to use the request body.

1.in request header include Content-type application/json

2.in code Use middleware to parse into json. app.use(express.json());

Note use  ​app.use(express.json()) before route declartion.

view example here

Bydefault body is undefined app.use(express.json()); help you to defined the data while content-type application/json allow you to pass json.if you did not include content-type application/json request.body will return define empty object { }.

Answer 2

I think you should use body-parser http://expressjs.com/en/resources/middleware/body-parser.html