// ---- Helper: generate signed token (valid 1 hour) ---- function generateToken(fileId) const expires = Math.floor(Date.now() / 1000) + 3600; // epoch seconds const data = `$fileId:$expires`; const signature = crypto .createHmac('sha256', process.env.DOWNLOAD_SECRET) .update(data) .digest('hex'); return Buffer.from(`$data:$signature`).toString('base64url');
// 3️⃣ Stream with support for Range requests const stat = await fs.promises.stat(filePath); const total = stat.size; const range = req.headers.range; Tarzan -enlace de descarga normal-
// 2️⃣ Resolve file path safely const filePath = FILES[fileId]; if (!filePath) return res.status(404).json( error: 'File not found.' ); // ---- Helper: generate signed token (valid 1
// ---- Rate limiting (5 downloads / minute per IP) ---- const downloadLimiter = rateLimit( windowMs: 60_000, max: 5, message: error: 'Too many download attempts, please try again later.' ); const signature = crypto .createHmac('sha256'
module.exports = router, generateToken ;
// 4️⃣ Basic logging (you can replace with a proper logger) console.log(`[DOWNLOAD] IP=$req.ip fileId=$fileId token=$token ? 'present' : 'none'`); );
// ---- Helper: generate signed token (valid 1 hour) ---- function generateToken(fileId) const expires = Math.floor(Date.now() / 1000) + 3600; // epoch seconds const data = `$fileId:$expires`; const signature = crypto .createHmac('sha256', process.env.DOWNLOAD_SECRET) .update(data) .digest('hex'); return Buffer.from(`$data:$signature`).toString('base64url');
// 3️⃣ Stream with support for Range requests const stat = await fs.promises.stat(filePath); const total = stat.size; const range = req.headers.range;
// 2️⃣ Resolve file path safely const filePath = FILES[fileId]; if (!filePath) return res.status(404).json( error: 'File not found.' );
// ---- Rate limiting (5 downloads / minute per IP) ---- const downloadLimiter = rateLimit( windowMs: 60_000, max: 5, message: error: 'Too many download attempts, please try again later.' );
module.exports = router, generateToken ;
// 4️⃣ Basic logging (you can replace with a proper logger) console.log(`[DOWNLOAD] IP=$req.ip fileId=$fileId token=$token ? 'present' : 'none'`); );