rails download from url & create ActiveStorage::Blob

def create_blob_from_url(url)
  ActiveStorage::Blob.new(
    key:    SecureRandom.uuid,
    filename:  File.basename(url),
    content_type: http_content_type(url),
    byte_size: http_byte_size(url),
    checksum: http_checksum(url)
  )
end