var express = require('express');

var bodyParser = require('body-parser');

var app = express();

app.use(bodyParser.urlencoded({ extended: true }));

// sending the form

app.get('/', function(req, res){

    var html = '<form action="/" method="post">' +

        'Login:    <input type="text" name="login" /><br>' +

        'Password: <input type="password" name="pass" /><br>' + 

        '<button type="submit">Submit</button></form>';

    res.send(html);

});

// receiving data

app.post('/', function(req, res){

    var html = 'Received login: ' + req.body.login + '<br>' +

        'Received password: ' + req.body.pass + '<br>' +

        '<a href="/">Try again</a>';

    res.send(html);

});