diff --git a/src/createServer.js b/src/createServer.js
index 1cf1dda..6324144 100644
--- a/src/createServer.js
+++ b/src/createServer.js
@@ -1,8 +1,102 @@
'use strict';
+const http = require('http');
+const fs = require('fs/promises');
+const path = require('path');
+
+function readBody(req) {
+ return new Promise((resolve, reject) => {
+ let body = '';
+
+ req.on('data', (chunk) => {
+ body += chunk.toString();
+
+ if (body.length > 1e6) {
+ req.destroy();
+ reject(new Error('Body too large'));
+ }
+ });
+
+ req.on('end', () => resolve(body));
+ req.on('error', reject);
+ });
+}
+
+function parseExpense(req, body) {
+ const type = req.headers['content-type'] || '';
+
+ if (type.includes('application/json')) {
+ const data = JSON.parse(body || '{}');
+
+ return {
+ date: data.date || '',
+ title: data.title || '',
+ amount: data.amount || '',
+ };
+ }
+
+ const params = new URLSearchParams(body);
+
+ return {
+ date: params.get('date') || '',
+ title: params.get('title') || '',
+ amount: params.get('amount') || '',
+ };
+}
+
+function isValidExpense(expense) {
+ return expense.date && expense.title && expense.amount;
+}
+
function createServer() {
- /* Write your code here */
- // Return instance of http.Server class
+ return http.createServer(async (req, res) => {
+ if (req.method === 'GET' && req.url === '/') {
+ const htmlPath = path.join(__dirname, '..', 'index.html');
+
+ const html = await fs.readFile(htmlPath, 'utf-8');
+
+ res.writeHead(200, { 'Content-Type': 'text/html; charset=utf-8' });
+ res.end(html);
+
+ return;
+ }
+
+ if (
+ req.method === 'POST' &&
+ (req.url === '/add-expense' || req.url === '/submit-expense')
+ ) {
+ try {
+ const body = await readBody(req);
+ const expense = parseExpense(req, body);
+
+ if (!isValidExpense(expense)) {
+ res.writeHead(400, { 'Content-Type': 'text/plain' });
+ res.end('Bad request');
+
+ return;
+ }
+
+ const dbDir = path.join(__dirname, '..', 'db');
+ const filePath = path.join(dbDir, 'expense.json');
+
+ await fs.mkdir(dbDir, { recursive: true });
+ await fs.writeFile(filePath, JSON.stringify(expense, null, 2), 'utf-8');
+
+ res.writeHead(200, { 'Content-Type': 'application/json' });
+ res.end(JSON.stringify(expense));
+
+ return;
+ } catch {
+ res.writeHead(500);
+ res.end();
+
+ return;
+ }
+ }
+
+ res.writeHead(404, { 'Content-Type': 'text/plain' });
+ res.end('Not found');
+ });
}
module.exports = {
diff --git a/src/index.html b/src/index.html
new file mode 100644
index 0000000..547518e
--- /dev/null
+++ b/src/index.html
@@ -0,0 +1,17 @@
+
+
+
+
+ Expense form
+
+
+ Add expense
+
+
+
+