url_for_direct_upload

# File activestorage/lib/active_storage/service/disk_service.rb, line 75
    def url_for_direct_upload(key, expires_in,, content_type,, content_length,, checksum,, custom_metadata: {})
      instrument :url, key: key do |payload|
        verified_token_with_expiration = ActiveStorage.verifier.generate(
          {
            key: key,
            content_type: content_type,
            content_length: content_length,
            checksum: checksum,
            service_name: name
          },
          expires_in: expires_in,
          purpose: :blob_token
        )

        url_helpers.update_rails_disk_service_url(verified_token_with_expiration, url_options).tap do |generated_url|
          payload[:url] = generated_url
        end
      end
    end