How to get httpsession to follow redirects

[Fran-Rg]

I'm building a s3 web proxy. I'm trying to integrate it with aws cli.
The cli would be configured with:

[profile locals3]
output=json
endpoint_url=http://127.0.0.1:5000/

I want to be able to do aws s3 cp s3://BUCKET/FILE Y. This calls a GET request to: http://127.0.0.1:5000/BUCKET/FILE. I would like this request to redirect to a s3 presigned url. So the web proxy would return 302 -> PRESIGNED_URL.

However botocore calls urllib3.connectionpool but does not follow the redirect.

Digging in the code: https://github.com/boto/botocore/blob/develop/botocore/httpsession.py#L469
This is the call that makes the GET request, but with Retry(False) it won't follow any redirect:

    :param redirect:
       If True, automatically handle redirects (status codes 301, 302,
      303, 307, 308). Each redirect counts as a retry. Disabling retries
       will disable redirect, too.

Is there a way to change the send function being used? Or have another connection pool to follow redirects?

I also tried to change the httpsession.py code to have Retry(True) but that connection doesn't change url. On Redirect it went from http://127.0.0.1:5000/BUCKET/FILE -> http://127.0.0.1:5000/<REDIRECTION_URL>. This is because it's using a pool for a single host:

class HTTPConnectionPool(ConnectionPool, RequestMethods):
    """
    Thread-safe connection pool for one host.

Is botocore not supposed to handle any redirect?