52 lines
1.3 KiB
JavaScript
52 lines
1.3 KiB
JavaScript
const storage = require('../storage');
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const mozlog = require('../log');
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const log = mozlog('send.download');
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const { statDownloadEvent } = require('../amplitude');
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module.exports = async function(req, res) {
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const id = req.params.id;
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try {
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const meta = req.meta;
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const contentLength = await storage.length(id);
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const fileStream = await storage.get(id);
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let cancelled = false;
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req.on('aborted', () => {
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cancelled = true;
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fileStream.destroy();
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});
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res.writeHead(200, {
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'Content-Type': 'application/octet-stream',
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'Content-Length': contentLength
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});
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fileStream.pipe(res).on('finish', async () => {
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if (cancelled) {
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return;
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}
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const dl = meta.dl + 1;
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const dlimit = meta.dlimit;
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const ttl = await storage.ttl(id);
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statDownloadEvent({
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id,
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ip: req.ip,
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owner: meta.owner,
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download_count: dl,
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ttl,
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agent: req.ua.browser.name || req.ua.ua.substring(0, 6)
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});
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try {
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if (dl >= dlimit) {
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await storage.del(id);
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} else {
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await storage.incrementField(id, 'dl');
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}
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} catch (e) {
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log.info('StorageError:', id);
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}
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});
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} catch (e) {
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res.sendStatus(404);
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}
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};
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