/* zero-dependency static server with aggressive no-caching */
const http = require('http');
const fs = require('fs');
const path = require('path');
const ROOT = __dirname;
const MIME = { '.html': 'text/html; charset=utf-8', '.js': 'text/javascript; charset=utf-8', '.css': 'text/css; charset=utf-8', '.png': 'image/png', '.ico': 'image/x-icon', '.json': 'application/json' };
http.createServer((req, res) => {
  let p = decodeURIComponent((req.url || '/').split('?')[0]);
  if (p === '/') p = '/index.html';
  const file = path.normalize(path.join(ROOT, p));
  if (!file.startsWith(ROOT)) { res.writeHead(403); return res.end(); }
  fs.readFile(file, (err, data) => {
    if (err) { res.writeHead(404, { 'Cache-Control': 'no-store' }); return res.end('not found'); }
    res.writeHead(200, {
      'Content-Type': MIME[path.extname(file)] || 'application/octet-stream',
      'Cache-Control': 'no-store, no-cache, must-revalidate',
      'Pragma': 'no-cache',
      'Expires': '0'
    });
    res.end(data);
  });
}).listen(8917, '127.0.0.1', () => console.log('wulin serving on http://127.0.0.1:8917 (no-store)'));