I'm trying to make a post request passing json data. When the request arrives on my express server, it does not have a body. What am I doing wrong?

const http = require('http');
const req = http.request({
         hostname: 'localhost',
         port: 8080,
         path: '/',
         method: 'POST'
        }, (res) => {

    res.on('end', () => {
        // 
    });
});

req.write(JSON.stringify({ something: 'something' }));

req.end();

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

app.post('/', (req, res) => {
    console.log(req.body); // undefined
    res.send();
});

app.use(express.json());

app.listen(8080);

I have to use the http library of nodejs.

CodePudding user response：

You should:

• Move the line where you register the JSON parsing middleware so it appears before the line where you register the / handler. Handlers are called in order so with your current approach, the / will fire and end the chain without reaching the middleware.
• Add a Content-Type: application/json request header to the client-side code so that the body parser will not skip over it because it doesn't recognise the (un)declared data type.

CodePudding user response：

8bitIcon could be right. This behavior could be the result of not using a middle ware that parses the body of your request. Check out this post, might help you to solve the problem.

Thank you.