Ruby open "userinfo not supported": URL with basic auth - ruby

Question

I have a lot of URLs in the following format
ftp://user:pass#example.com/some_image.jpg
https://user:pass#example.com/some_image.jpg
When I try to load the image with ruby's open method, it throws the following error for https, but works for ftp
open(URI.parse("ftp://user:pass#example.com/some_image.jpg")) # works
open(URI.parse("https://user:pass#example.com/some_image.jpg")) # throws error:
# ArgumentError: userinfo not supported. [RFC3986]
I found (JSON parse from a Remote URL which requires a username and password) that you can provide open with basic auth parameter like this
url = URI.parse(url)
open(url, http_basic_authentication: [url.user,url.password])
But this still throws the error, because the url contains still the user / password info.
So, what would be an easy way to parse out the user / password info from the url? I tried it by concatenating the parts of the URL by myself like this:
uri = URI.parse(url)
uri_base = "#{uri.scheme}://#{uri.host}:#{uri.port}#{uri.path}"
uri_base += "?#{uri.query}" if uri.query
open(uri_base, http_basic_authentication: [uri.user,uri.password])
But this doesn't work for FTP, it throws an Net::FTPPermError: 530 User _ftp denied by SACL. error.
So is there an easy way to support open with optional http basic authentication for https AND ftp?
Update
I came up with the following solution, but it looks kinda hacky, and I think there must be a better way:
def download url
opts = {}
uri = URI.parse(url)
uri_base = "#{uri.scheme}://"
if uri.scheme=="ftp"
uri_base += "#{uri.user}:#{uri.password}#" if uri.user
else
opts[:http_basic_authentication] = [uri.user,uri.password] if uri.user
end
uri_base += "#{uri.host}:#{uri.port}/#{uri.path}"
uri_base += "?#{uri.query}" if uri.query
open(uri_base, opts)
end