REST API Redirected Query Forwarding Headers


I am using a REST API Resource to interact with my interface-less API backend and use Retool to build an administration section.


I want to let my Retool users download a file which is exposed behind a secured endpoint on my backend (through authorization header) which does a URL Redirection (HTTP 302) to a temporary public url.

HTTP Response of the REST API

curl -I -H 'Authorization: MyAuthorizationToken'

HTTP/1.1 302 Found
Server: Cowboy
Date: Mon, 22 Nov 2021 12:40:42 GMT
Referrer-Policy: strict-origin-when-cross-origin
Location: ⬅️ *A temporary public URL*


I encounter two problems here. The Query that I am building on Retool is automatically following the redirect and is leaking the authorization header by forwarding it to the redirect url.

Expected Behaviour

The headers are not forwarded
I can choose whether I want the query to follow the redirect or not and pick up the location myself in the metadata.

Help Needed

  • Am I missing something that might explain Retool's Query implementation choice of forwarding the headers ?
  • Am I missing a way to achieve my goal of requesting to my backend the generation of a temporary URL using the configured REST API Resource and access the response before the redirect ?

As a reference curl itself had this issue a few years back and fixed their implementation to clear the authorization header when the second host (the one redirected to) is different than the original host (the one requested that returned the HTTP 30X).