send/server/routes/download.js

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const storage = require('../storage');
module.exports = async function(req, res) {
const id = req.params.id;
try {
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const { length, stream } = await storage.get(id);
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res.writeHead(200, {
'Content-Type': 'application/octet-stream',
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'Content-Length': length
});
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stream.pipe(res);
} catch (e) {
res.sendStatus(404);
}
};