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JavaScript Express Basics Deeper into Routing with Express Redirects

Daniel Hernandez
Daniel Hernandez
13,437 Points

res.redirect won't work and main website won't display typed cookie username

I have run into two problems. One is that res.redirect won't work, after submitting the form, the page stays at "/hello". And also my main page will not display the typed username, instead displaying absolutely nothing where the variable "name" is. Here is my code. Thanks ahead for any help you guys can give.

Here is the app.js file.

const express = require('express');
const bodyParser = require('body-parser');
const cookieParser = require('cookie-parser');
const app = express();

app.use(bodyParser.urlencoded({extended: false }));
app.use(cookieParser());
app.set('view engine', 'pug')

app.get('/', (req, res) =>{
  const name = req.cookies.username;
    res.render("index" , { name});
});


app.get('/cards', (req, res) =>{
    res.render('card', { prompt: "Who is buried under Grant's Tomb"});
});

app.get('/hello', (req, res) =>{
    res.render('hello');
});


app.post('/hello', (req, res) =>{
        res.cookie('username', req.body.username);
        res.redirect('/');
});


app.listen(3001, ()=> {
  console.log('The application is running on port 3000')
});

And here is the index.pug file

extends layout.pug

block content
  section#content
    h2 Welcome,#{name}!
Travis Lloyd
Travis Lloyd
9,479 Points

Looks like you accidentally set app.listen to port 3001 instead of 3000. Hope that helps! Cheers!

1 Answer

Kevin Gates
Kevin Gates
14,854 Points

For the redirect, the console for me said I needed to change what I sent, namely that I needed a status code. So I'm sending this now:

app.post('/hello', (req, res) => {
    res.cookie('username', req.body.username);
    res.redirect( '/', 302, {name: req.cookies.username});
});

The whole answer is: app.js

const express = require('express');
const bodyParser = require('body-parser');
const cookieParser = require('cookie-parser');

const app = express();
app.use(bodyParser.urlencoded({extended: false}));
app.use(cookieParser());

app.set('view engine', 'pug');

app.get('/', (req, res) => {
    const name = req.cookies.username;
    res.render('index', {name});
});

app.get('/hello', (req, res) => {
    res.render('hello');
});
app.post('/hello', (req, res) => {
    res.cookie('username', req.body.username);
    res.redirect( '/', 302, {name: req.cookies.username});
});

app.get('/cards', (req, res) => {
    res.locals.prompt = "Who is buried in Grant's tomb?";
    res.render('card', {});
});

app.listen(3000, ()=> {
    console.log('The application is running on localhost:3000!');
});

Which it does work for me now.

Presuming you updated index.pug to

extends layout.pug
block content
    section#content
        h2 Welcome, #{name}!