How to preserve filename when piping an s3 file download using pkgcloud and express

Question

How to preserve filename when piping an s3 file download using pkgcloud and express

I'm using an express server to proxy a file to download from amazon s3. How do I either preserve the filename in the header or set the filename info in the headers so that when a user downloads the filename it doesn't just say s3.jpeg but instead correctly says test.jpg?

 app.get("/s3", function(req, res) {
    var client;

    client = require('pkgcloud').storage.createClient({
      provider: "amazon",
      key: "test",
      keyId: "test"
    });
    return client.download({
      container: 'test',
      remote: 'test.jpg'
    }).pipe(res);
  });

node.js

Answer 1

Ok, seems easy enough

res.setHeader('Content-disposition', 'attachment; filename=test.jpg');

in coffeescript

app.get "/s3", (req, res) ->

    res.setHeader('Content-disposition', 'attachment; filename=test.jpg');

    client.download(
        container:'test'
        remote:'test.jpg'
    ).pipe res