Upload Facebook profile image with Carrierwave - ruby

Question

I'm trying to use the Facebook profile image with Devise, uploading it to S3 with CarrierWave / fog, but the link I'm getting from Facebook provided in auth.info.image is a link to download the file, not an image that CarrierWave can use.
If you go to the link in a browser, it is a file download link. I've not seen any articles anywhere that address this. I thought I could use CarrierWave to download the file to /tmp, then upload it, but calls to CarrierWave::Uploader::Download do not work. Or I've seen other articles explaining that you can save the link provided by Facebook just use that in an = image_tag but that doesn't work, either.
In my User model:
def self.from_omniauth(auth)
where(provider: auth.provider, uid: auth.uid).first_or_create! do |user|
user.email = auth.info.email
user.provider = auth.provider
user.first_name = auth.info.first_name
user.last_name = auth.info.last_name
user.uid = auth.uid
user.password = Devise.friendly_token[0, 20]
user.password_confirmation = user.password
user.profile_image = auth.info.image
end
end
but user.profile_image is nil. I have no problem with CarrierWave - I've used it on several other projects to save to AWS with fog.
I would like to either a) save a link to the image that I can use in a Rails view, but as mentioned already, I do not have that - the link returned by Facebook is a link to download an image, so, b) is to download the file, save the filename to the User model and upload the file to AWS.

Answer 1

Use "#{auth.info.image}?type=large" instead of auth.info.image

Answer 2

Apparently CarrierWave has its own magic, whereby if you prepend the field name with remote_ and append it with _url it knows to download a file before uploading. So, my field name is profile_image, and (in my User model) self.from_omniauth(auth) method:
user.remote_profile_image_url = auth.info.image
just works. The field name has the correct filename saved to it, and the files (full size and thumbnail) are uploaded to S3.