Using nginx-s3-gateway for S3 PUT requests on multiple endpoints?

[smiba]

Hi,

I'm looking for a way to route a single S3 PUT request to the right S3 endpoint depending on the location of the file, like this:
PUT /bucket/europe/file
--> AWS host s3.nl-ams.scw.cloud
PUT /bucket/america/file
--> AWS host s3.us-ams.scw.cloud

I foolishly thought I could just proxy_pass requests through Nginx like this:

#NOTE: THIS DOES NOT WORK -- IF YOURE COMING HERE FROM GOOGLE THIS IS A NON WORKING CONFIG for S3 PUT reqs!
server {
  listen 127.0.0.1:8080;
  client_max_body_size 10G;

  location /bucket/america/ {
    proxy_pass https://s3.us-ams.scw.cloud;
  }

  location /bucket/europe/ {
    proxy_pass https://s3.nl-ams.scw.cloud;
  }

  location / {
    return 404; #Not our bucket?
  }
}

But this obviously doesn't work as the S3v4 signature is not valid because the host gets signed into the request
What I need is something that recalculates the S3v4 signature, this should be doable afaik as long as we use unsigned payloads (which is fine for us).
However is this something nginx-s3-gateway can do? If not, does anyone know of tooling that /can/ provide this?

Changes to the code of the software that makes the PUT requests is not possible unfortunately.

Thanks!

[smiba]

Got it working using https://github.com/smiba/lua-resty-aws to sign requests instead of this project