Express js req.body returns empty

Question

I\'ve tried the all solutions from some another stackoverflow posts but it didn\'t solved my issue.

Here is my app.js

var express = requ         


        

Answer 1

body-parser

The bodyParser object exposes various factories to create middlewares. All middlewares will populate the req.body property with the parsed body, or an empty object {} if there was no body to parse (or an error was returned).

---

app.use(bodyParser.urlencoded({ extended: true })); // for encoded bodies

A new body object containing the parsed data is populated on the request object after the middleware, req.body will contain the parsed data, this object will contain key-value pairs, where the value can be a string or array

The Content-Type is application/x-www-form-urlencoded

---

app.use(bodyParser.json()); // for json encoded bodies

A new body object containing the parsed data is populated on the request object after the middleware (i.e. req.body).

The Content-Type is application/json

---

application/json is used when you are posting the data {"test":"hello"} like this. www-form-url-encoded is used to get the data as key-value in object from the url when used the app.use(bodyParser.urlencoded({ extended: true }));. They both are different and have their own use cases

Answer 2

After removing the last 4 lines of code (to be sure you are configuring correctly the routes) and adding this test lines:

app.post('/ping', function (req,res) {
    console.log(req.body);
    res.send('ok ' + req.body.test);
});
let server = http.createServer(app);
server.listen(8899, function onstart() {
    console.log('server listening');
});

When I run:

curl -X POST http://localhost:8899/ping -d '{"test": 1234}'

I get ok undefined, like you did. After adding the proper content-type header:

curl -X POST http://localhost:8899/ping -d '{"test": 1234}' -H "content-type: application/json"

it works like a charm and I get ok 1234. So I think you are missing the "content-type: application/json" header in your postman.