How to save an image from a url with rails active storage?

Question

I\'m looking to save a file (in this case an image) located on another http web server using rails 5.2 active storage.

I have an object with a string parameter for s

Answer 1

using the down gem to avoid the security issues of using open-uri:

image = Down.download(image_url)
user.image.attach(io: image, filename: "image.jpg")

Answer 2

The simplest way to do this without having to enter filename explicitly is:

url = URI.parse("https://your-url.com/abc.mp3")
filename = File.basename(url.path)
file = URI.open(url)
user = User.first
user.avatar.attach(io: file, filename: filename)

This automatically saves the avatar against that particular user object.

In case you are using a remote service like S3 the URL can be retrieved by:

user.avatar.service_url

Answer 3

Just found the answer to my own question. My first instinct was pretty close...

require 'open-uri'

class User < ApplicationRecord
  has_one_attached :avatar
  before_save :grab_image

  def grab_image
    downloaded_image = open("http://www.example.com/image.jpg")
    self.avatar.attach(io: downloaded_image  , filename: "foo.jpg")
  end

end