Next.js - Error: only absolute urls are supported

Question

I\'m using express as my custom server for next.js. Everything is fine, when I click the products to the list of products

Step 1: I click the produc

Answer 1

Case 1. It's not an error. The isomorphic-unfetch is running by SSR mode, so Node.js needs to know the absolute url to fetch from it, because the back-end doesn't know your browser settings.

Case 2. Another scenario is to prevent the http host poisoning headers attack.

append secret keys and tokens to links containing it:

  (Django, Gallery, others)

....and even directly import scripts from it: