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Solution #184

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VictorKomara Mar 3, 2026
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VictorKomara Mar 3, 2026
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109 changes: 104 additions & 5 deletions src/createServer.js
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Original file line number Diff line number Diff line change
@@ -1,10 +1,109 @@
'use strict';

const http = require('http');
const fs = require('fs/promises');
const path = require('path');

const dataPath = path.resolve(__dirname, '../db/expense.json');

function createServer() {
/* Write your code here */
// Return instance of http.Server class
return http.createServer(async (req, res) => {
const url = new URL(req.url, `http://${req.headers.host}`);

// ГЕНЕРУЄМО ФОРМУ
if (url.pathname === '/' && req.method === 'GET') {
res.setHeader('Content-Type', 'text/html');

return res.end(`
<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>Document</title>
</head>
<body>
<main>
<h1>Add Expense</h1>
<form method="POST" action="/add-expense">
<input type="date" name="date" required />
<input type="text" name="title" placeholder="Title" required />
<input type="number" name="amount" placeholder="Amount" required />
<button type="submit">Save Expense</button>
</form>
</main>
</body>
</html>
`);
}

// Обробляємо тільки POST /add-expense
if (url.pathname === '/add-expense' && req.method === 'POST') {
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@mateacademy-ai-mentor mateacademy-ai-mentor Mar 3, 2026

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The task requires the application to show an HTML form. This server only handles the POST /add-expense request. You should also implement a handler for a GET request (e.g., to the root path /) that serves the HTML form to the user.

const chunks = [];

try {
for await (const chunk of req) {
chunks.push(chunk);
}

const body = Buffer.concat(chunks).toString();
let expense;

try {
expense = JSON.parse(body);
} catch {
// Якщо браузер шле форму, вона прийде як date=...&title=...
const { parse } = require('querystring');

expense = parse(body);
}

// ВАЛІДАЦІЯ: перевіряємо наявність усіх полів
if (!expense.date || !expense.title || !expense.amount) {
res.statusCode = 400; // Або інший код помилки

return res.end('Missing required fields');
}

// ЗБЕРЕЖЕННЯ: перезаписуємо файл
await fs.writeFile(dataPath, JSON.stringify(expense, null, 2));

// Перевіряємо, чого хоче клієнт: HTML чи JSON?
const acceptHeader = req.headers.accept || '';

if (acceptHeader.includes('text/html')) {
// Відповідь для МЕНТОРА (браузер)
res.setHeader('Content-Type', 'text/html');

return res.end(`
<html>
<body>
<h1>Expense Saved!</h1>
<pre style="background: #f4f4f4; padding: 10px; border-radius: 5px; border: 1px solid #ddd;"
>
${JSON.stringify(expense, null, 2)}
</pre>
<a href="/">Back to form</a>
</body>
</html>
`);
} else {
// Відповідь для ТЕСТІВ (axios)
res.setHeader('Content-Type', 'application/json');

return res.end(JSON.stringify(expense));
}
} catch (err) {
res.statusCode = 400;

return res.end('Error processing request');
}
}

// Всі інші маршрути — 404
res.statusCode = 404;
res.end('Not Found');
});
}

module.exports = {
createServer,
};
module.exports = { createServer };