Http Request / Redirect Clarification

[billygcode]

Hello, I am currently investigating automatic redirects in aws-sdk-go-v2. From what I can see from the source code, answered questions on here, debugging, and testing, the automatic redirect is for 307 and 308.

After looking at the source code and debugging, I noticed that the SDK creates a http.Request using smithy-go( https://github.com/aws/smithy-go/blob/v1.13.5/transport/http/request.go#L161 ) and then proceeds to send the request using the standard Golang library (https://github.com/golang/go/blob/master/src/net/http/client.go). Am I correct?

If this is correct, smithy-go creates a http.Request without the function variable getBody() which is checked when the request is 307 or 308 with the standard golang library.
if ireq.GetBody == nil && ireq.outgoingLength() != 0 { shouldRedirect = false }
(https://github.com/golang/go/blob/master/src/net/http/client.go#L522)

This means that ireq.GetBody is always nil, and will never redirect when the request has an outgoingLength that is not 0. So any request with a body (e.g. putObject()) will not redirect automatically, everything else should. All my tests show automatic redirect for all functions except for the ones with a body provided.

Is this correct? If not, how are the request created and sent out, where is the getBody() initialized?