req.body undefined on server side - node.js

Question

I am working on app which uses node, express, mysql on server side. i have written serveral APIs on server.js file and when i am trying to access those using Postman then req.body is always undefined.
this is my server.js configuration.
var express = require('express');
var mysql = require('mysql');
var cors = require('cors');
var bodyParser = require('body-parser');
var wrench = require("wrench");
var fs = require('fs');
var path = require("path");
var mkdirp = require('mkdirp');
var walk = require('walk');
var fse = require('fs-extra');
var multipart = require('connect-multiparty');
var multipartMiddleware = multipart();
var crypto = require('crypto');
app.use(cors());
app.use(bodyParser.urlencoded({limit: '50mb',extended: false}));
app.use(bodyParser.json({limit: '50mb'}));
var connection = mysql.createConnection({
host: 'localhost',
user: 'root',
password: 'pass',
database: 'dbname'
});
connection.connect(function(err) {
if (!err) {
console.log("Database is connected ... \n\n");
} else {
console.log("Error connecting database ... \n\n");
}
});
app.post('/urlreq', function(req, res){
console.log(req.body);
}
app.listen(3000, function(){
console.log("Rest Demo Listening on port 3000");
});
When i am trying send something in body in Postman then req.body is coming empty on server side.

Answer 1

If you are sending multipart/form-data, it doesn't work because bodyparser doesn't handle this body type.
In this case adding the following line should fix it:
app.use(multipartMiddleware);
Form the docs:
multipart/form-data is the default encoding a web form uses to transfer data

Answer 2

Try add:
var express = require('express');
var app = express();
[...]
// Last stack
app.listen(3000, function(){
console.log("Rest Demo Listening on port 3000");
});

Answer 3

You can use as a middleware also. Also listen on a port. add following lines in your code -
var app = express();
app.use(function(req, res, next) {
console.log('Current User:', req.body);
next();
});
app.post('/url', function(req,res){
console.log(req.body)
});
app.listen(3000, function(){
console.log('Express server listening on port 3000');
});