Download file

[pavelwitassek]

We are developing application with Nette and need we need to download file via AJAX, is possible to use standard ajax class and use Naja to this use case?

In some cases we need to show flash message via JS after file is downloaded, so it would be nice to support:
naja.makeRequest(...).then(showMessage(...))

[jiripudil]

Hi, I'm afraid Naja can't help you with that because it wasn't designed for that kind of use case.

I don't think downloads via AJAX are a good idea in general. It's better to redirect to the download URL (or open it in a new window) and let the browser handle the download (and the UI).

If you insist on an async download, you can use plain fetch() and then emulate the download via some URL.createObjectURL() incantations. The downside of this is that the browser has to put the entire file into the memory, so it's quite inefficient if the file is large.