Infrastructure: Replace electron-download, improve download experience about fiddle

[erickzhao]

@malept Would probably be ideal to show progress using a Blueprint.js component in the Version Select right where the "Downloading" text is right now. As well, allow the download to be cancelled by hovering and clicking on the same area.

[malept]

As well, allow the download to be cancelled by hovering and clicking on the same area.

I'll need to think about how we can expose download cancellation so we can resolve #320. It seems problematic with the current implementation because we're using stream piping to write the HTTP response to a file.

[malept]

Improving is probably the better path but it might require splitting electron-download into multiple packages.

I'm interested in hearing what you think about what the new packages would be.

[felixrieseberg]

@malept I'd love a module that simply handles the download (or maybe even just getting correct url to use), which could then be consumed by electron-download (with shell UI & co).

[malept]

I'd love a module that simply handles the download [...], which could then be consumed by electron-download (with shell UI & co)

It sounds like a simple electron-download-core ➡️ electron-download split to me. I was already thinking of replacing nugget with got + progress (or whatever progress bar module is in vogue right now), this would abstract it further.

[MarshallOfSound]

@malept @felixrieseberg I've rewritten electron-download a few times (and once with got) and I can never reach feature parity (especially things like proxy support). Not sure if that should be a massive concern but it's quite hard to match that proxy stuff

[malept]

I think that once we resolve electron/get#148, we can (finally) start working on this issue.

I'm interested to hear what folks think about how we should show download progress.

[erickzhao]

Closed in #358, I believe.

We now use @electron/get and have a progress bar in our downloads.