Unable to download from URL from behind a corporate proxy server

[tk3369]

I'm unable to use the open from URL function when running Pluto behind a corporate proxy server. See related issue JuliaLang/julia#27043.

Idea: can we add a checkbox in the UI to allow user to disable SSL verification check? If you switch over to HTTP.download then you can just set the ssl_verification_check flag to false.

[fonsp]

It looks like this will be fixed in Julia 1.6.0! I like the simplicity of download(url). ssl_verification_flag sounds like:

1. something that should be on
2. something that I do not want to think about

[fonsp]

We could also consider downloading using the frontend and sending the notebook via the WS connection. This would also allow for pasting an entire notebook into the main menu and dragging+dropping a notebook to open it as a template (we don't know the path where it came from unfortunately).
We also still need the original feature, to make one-click binder work