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solution #187

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8a685c5
solution
Nazarii-Lesniak Mar 22, 2026
cd2cbd7
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Nazarii-Lesniak Mar 22, 2026
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86 changes: 84 additions & 2 deletions src/createServer.js
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Original file line number Diff line number Diff line change
@@ -1,8 +1,90 @@
'use strict';

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

function createServer() {
/* Write your code here */
// Return instance of http.Server class
return http.createServer((request, response) => {
if (request.url === '/' && request.method === 'GET') {
const htmlPath = path.resolve(__dirname, 'index.html');

fs.readFile(htmlPath, 'utf-8', (error, data) => {
if (error) {
response.statusCode = 500;
response.end('Internal Server Error');

return;
}

response.statusCode = 200;
response.setHeader('Content-Type', 'text/html');
response.end(data);
});
} else if (request.url === '/add-expense' && request.method === 'POST') {
const chunks = [];

request.on('data', (chunk) => {
chunks.push(chunk);
});

request.on('end', () => {
try {
const bodyStr = Buffer.concat(chunks).toString();
let parsedData;

const contentType = request.headers['content-type'] || '';

if (contentType === 'application/json') {
parsedData = JSON.parse(bodyStr);
} else {
const params = new URLSearchParams(bodyStr);

parsedData = Object.fromEntries(params);
}

if (!parsedData.amount || !parsedData.title || !parsedData.date) {
response.statusCode = 400;
response.end('Invalid data');

return;
}

const dbPath = path.join(__dirname, '../db/expense.json');

fs.writeFile(dbPath, JSON.stringify(parsedData, null, 2), (error) => {
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@mateacademy-ai-mentor mateacademy-ai-mentor Mar 22, 2026

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Using fs.writeFile here overwrites the file with every new expense. The requirement is to save all expenses. You'll need to first read the contents of db/expense.json, parse it into an array, add the new expense to that array, and then write the entire updated array back to the file.

if (error) {
response.statusCode = 500;
response.end('Internal Server Error');

return;
}

const accept = request.headers.accept || '';

if (accept.includes('text/html')) {
response.statusCode = 200;
response.setHeader('Content-Type', 'text/html');

response.end(`
<pre>${JSON.stringify(parsedData, null, 2)}</pre>
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@mateacademy-ai-mentor mateacademy-ai-mentor Mar 22, 2026

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Great job wrapping the JSON in <pre> tags! However, the response should display all the expenses that are saved in the file, not just the one that was newly added. After you fix the file-saving logic, you should have the full array of expenses available to stringify and send here.

`);
} else {
response.statusCode = 200;
response.setHeader('Content-Type', 'application/json');
response.end(JSON.stringify(parsedData));
}
});
} catch (error) {
response.statusCode = 400;
response.end('Invalid data');
}
});
} else {
response.statusCode = 404;
response.end('Not Found');
}
});
}

module.exports = {
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16 changes: 16 additions & 0 deletions src/index.html
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Original file line number Diff line number Diff line change
@@ -0,0 +1,16 @@
<!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>
<form method="post" action="/add-expense">
<input type="text" name="title" placeholder="Title">
<input type="text" name="amount" placeholder="Amount">
<input type="text" name="date" placeholder="Date">
<button type="submit">Add Expense</button>
</form>
</body>
</html>
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