#12

backend/app/controllers/preview_controller.rb

@@ -20,7 +20,7 @@ class PreviewController < ApplicationController
     return head :unauthorized unless current_user
 
     url = params[:url]
-    return head :bad_request unless url.present?
+    return head :bad_request if url.blank?
 
     path = Rails.root.join('tmp', "thumb_#{ SecureRandom.hex }.png")
     system("node #{ Rails.root }/lib/screenshot.js #{ Shellwords.escape(url) } #{ path }")