drop.chapril.org-firefoxsend/server/routes/download.js

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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 {
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const meta = req.meta;
const contentLength = await storage.length(id);
res.writeHead(200, {
'Content-Disposition': 'attachment',
'Content-Type': 'application/octet-stream',
'Content-Length': contentLength,
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'WWW-Authenticate': `send-v1 ${req.nonce}`
});
const file_stream = storage.get(id);
let cancelled = false;
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req.on('close', () => {
cancelled = true;
file_stream.destroy();
});
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file_stream.on('end', async () => {
if (cancelled) {
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return;
}
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const dl = meta.dl + 1;
const dlimit = meta.dlimit;
try {
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if (dl >= dlimit) {
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await storage.del(id);
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} else {
await storage.setField(id, 'dl', dl);
}
} catch (e) {
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log.info('StorageError:', id);
}
});
file_stream.pipe(res);
} catch (e) {
res.sendStatus(404);
}
};