const storage = require('../storage'); const mozlog = require('../log'); const log = mozlog('send.download'); module.exports = async function(req, res) { const id = req.params.id; try { const meta = req.meta; const contentLength = await storage.length(id); res.writeHead(200, { 'Content-Disposition': 'attachment', 'Content-Type': 'application/octet-stream', 'Content-Length': contentLength, 'WWW-Authenticate': `send-v1 ${req.nonce}` }); const file_stream = storage.get(id); let sentBytes = 0; file_stream.on('data', c => (sentBytes += c.length)); file_stream.on('end', async () => { if (sentBytes < contentLength) { return; } const dl = meta.dl + 1; const dlimit = meta.dlimit; try { if (dl >= dlimit) { await storage.del(id); } else { await storage.setField(id, 'dl', dl); } } catch (e) { log.info('StorageError:', id); } }); file_stream.pipe(res); } catch (e) { res.sendStatus(404); } };