gauvainboiche
130 lines
3.8 KiB
JavaScript
130 lines
3.8 KiB
JavaScript
'use strict';
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const http = require('node:http');
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const fs = require('node:fs');
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const path = require('node:path');
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const { URL } = require('node:url');
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const { gregorianToRepublican } = require('./src/republicanCalendar');
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const PORT = process.env.PORT || 3000;
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const PUBLIC_DIR = path.join(__dirname, 'public');
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const LOCALES_DIR = path.join(__dirname, 'locales');
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const MIME_TYPES = {
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'.html': 'text/html; charset=utf-8',
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'.css': 'text/css; charset=utf-8',
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'.js': 'text/javascript; charset=utf-8',
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'.json': 'application/json; charset=utf-8',
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'.svg': 'image/svg+xml',
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'.png': 'image/png',
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'.ico': 'image/x-icon',
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};
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function sendJson(res, statusCode, payload) {
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const body = JSON.stringify(payload);
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res.writeHead(statusCode, {
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'Content-Type': 'application/json; charset=utf-8',
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'Content-Length': Buffer.byteLength(body),
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});
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res.end(body);
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}
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function nowUtc() {
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const now = new Date();
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return {
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year: now.getUTCFullYear(),
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month: now.getUTCMonth() + 1,
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day: now.getUTCDate(),
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};
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}
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function convertAndRespond(res, gregorianDate) {
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try {
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const republicanDate = gregorianToRepublican(gregorianDate);
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sendJson(res, 200, { ok: true, republicanDate });
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} catch (error) {
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if (error.message === 'BEFORE_EPOCH') {
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sendJson(res, 400, {
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ok: false,
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error: 'BEFORE_EPOCH',
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message: 'The Republican calendar begins on 22 September 1792.',
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});
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return;
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}
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sendJson(res, 400, {
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ok: false,
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error: 'INVALID_DATE',
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message: 'The given date does not exist in the Gregorian calendar.',
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});
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}
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}
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/** Serves a file from rootDir, rejecting any path that escapes it. */
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function serveStatic(res, rootDir, requestPath) {
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const decodedPath = decodeURIComponent(requestPath.split('?')[0]);
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const safeSuffix = path.normalize(decodedPath).replace(/^([.][.][/\\])+/, '');
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const filePath = path.resolve(rootDir, `.${path.sep}${safeSuffix}`);
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if (filePath !== rootDir && !filePath.startsWith(rootDir + path.sep)) {
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res.writeHead(403, { 'Content-Type': 'text/plain; charset=utf-8' });
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res.end('Forbidden');
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return;
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}
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fs.readFile(filePath, (readErr, content) => {
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if (readErr) {
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res.writeHead(404, { 'Content-Type': 'text/plain; charset=utf-8' });
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res.end('Not found');
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return;
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}
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const ext = path.extname(filePath).toLowerCase();
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res.writeHead(200, { 'Content-Type': MIME_TYPES[ext] || 'application/octet-stream' });
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res.end(content);
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});
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}
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const server = http.createServer((req, res) => {
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if (req.method !== 'GET') {
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res.writeHead(405, { 'Content-Type': 'text/plain; charset=utf-8' });
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res.end('Method not allowed');
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return;
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}
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const requestUrl = new URL(req.url, `http://${req.headers.host || 'localhost'}`);
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const pathname = requestUrl.pathname;
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if (pathname === '/api/today') {
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convertAndRespond(res, nowUtc());
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return;
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}
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if (pathname === '/api/convert') {
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const year = Number.parseInt(requestUrl.searchParams.get('year'), 10);
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const month = Number.parseInt(requestUrl.searchParams.get('month'), 10);
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const day = Number.parseInt(requestUrl.searchParams.get('day'), 10);
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if (!Number.isInteger(year) || !Number.isInteger(month) || !Number.isInteger(day)) {
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sendJson(res, 400, {
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ok: false,
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error: 'INVALID_DATE',
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message: 'year, month and day query parameters are required integers.',
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});
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return;
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}
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convertAndRespond(res, { year, month, day });
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return;
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}
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if (pathname.startsWith('/locales/')) {
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serveStatic(res, LOCALES_DIR, pathname.slice('/locales'.length));
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return;
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}
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serveStatic(res, PUBLIC_DIR, pathname === '/' ? '/index.html' : pathname);
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});
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server.listen(PORT, () => {
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console.log(`Calendrier republicain server listening on port ${PORT}`);
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});
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