What’s wrong with my code though?
require(‘dotenv’).config();
const express = require(‘express’);
const cors = require(‘cors’);
const app = express();
const dns = require(‘dns’);
const urlparser = require(‘url’);
const port = process.env.PORT || 3000;
const urlDatabase = ;
let urlCounter = 1;
app.use(cors());
app.use(express.urlencoded({ extended: true }));
app.use(‘/public’, express.static(${process.cwd()}/public));
app.get(‘/’, function(req, res) {
res.sendFile(process.cwd() + ‘/views/index.html’);
});
app.post(‘/api/shorturl’, (req, res) => {
const originalUrl = req.body.url;
let parsedUrl;
try {
parsedUrl = new URL(originalUrl);
if (parsedUrl.protocol !== ‘http:’ && parsedUrl.protocol !== ‘https:’) {
return res.json({ error: ‘invalid url’ });
}
} catch (err) {
return res.json({ error: ‘invalid url’ });
}
dns.lookup(parsedUrl.hostname, (err) => {
if (err) {
return res.json({ error: 'invalid url' });
}
let existingEntry = urlDatabase.find(entry => entry.original_url === originalUrl);
if (existingEntry) {
return res.json({
original_url: existingEntry.original_url,
short_url: existingEntry.short_url
});
}
// Create and save new entry
const newEntry = {
original_url: originalUrl,
short_url: urlCounter++
};
urlDatabase.push(newEntry);
res.json(newEntry);
});
});
app.get(‘/api/shorturl/:short_url’, (req, res) => {
const shortUrlParam = req.params.short_url;
const shortUrlId = parseInt(shortUrlParam, 10);
const urlEntry = urlDatabase.find(entry => entry.short_url === shortUrlId);
if (urlEntry) {
return res.redirect(urlEntry.original_url);
} else {
return res.json({ error: ‘No short URL found for the given input’ });
}
});
app.listen(port, function() {
console.log(Listening on port ${port});
});
Sorry I don’t know how to add it correctly.
