How store an image from URL with Active Storage

Question

My question is about: How can i upload an image from URL when i'm using Active Storage. I used the code from other post here in Stackoverflow but passing through the model method, the param which i need to store in my table. The curiously situation is that i'm receiving the next error:

ActiveSupport::MessageVerifier::InvalidSignature in PostsController#update

But when i reload the show view, from this model, the images appears stored and deployed on my posts view.

Here my code in Post model:

class Post < ApplicationRecord
  require 'open-uri'

  has_one_attached :image_one
  has_one_attached :image_two
  has_one_attached :url_image

  before_save :grab_image

  
  def grab_image(url)
    downloaded_image = open(url)
    self.url_image.attach(io: downloaded_image, filename: "map.jpg", content_type:"image/jpg")
  end
  
end

This is my code in the Edit Action of my Controller:

  def update
    @posturl = params[:post][:url_image]
    @post.grab_image(@posturl)
    respond_to do |format|
      if @post.update!(post_params)
        format.html { redirect_to @post, notice: 'Post was successfully updated.' }
        format.json { render :show, status: :ok, location: @post }
      else
        format.html { render :edit }
        format.json { render json: @post.errors, status: :unprocessable_entity }
      end
    end
  end

I got the following links which talks about the chance to upload images from URLs but, i don´t know what else can i do:

Active Storage Overview - EdgeGuides

@omnilord/rails-5-2-activestorage-mitigating-adoption-pitfalls

Answer 1

Maybe this work for u:

file = open(url)
user.image.attach(io: file, filename: "temp.#{file.content_type_parse.first.split("/").last}", content_type: file.content_type_parse.first)

Answer 2

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

require 'open-uri'

url = URI.parse("https://your-url.com/abc.mp3")
filename = File.basename(url.path)
file = URI.open
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

Here is an example:

file_url = image[:image_url]
download = open(file_url)
IO.copy_stream(download,
user.image.attach(
  io: download,
  filename: image[:name],
  content_type: image[:content_type],
))