HTTP protocol doesn't return body response when retrying

[arxeiss]

Description
If I send event with HTTP protocol (without retrying), in the Result I can see also body response. This is useful to understand what went wrong.

However, if I send event with HTTP Protocol and passing retry options via context like

Send(cloudevents.ContextWithRetriesExponentialBackoff(ctx, time.Second, 3), evt)

I'm getting back only status code. Not the body itself.

Source of bug
I believe the issue is on line 181 in ⬇️ because you are expecting err is type of http.Result. But after retrying, it is protocol.Result.

sdk-go/v2/protocol/http/protocol.go

Lines 179 to 197 in 44dff96

	if err != nil && !protocol.IsACK(err) {
	var res *Result
	if protocol.ResultAs(err, &res) {
	if message, ok := msg.(*Message); ok {
	buf := new(bytes.Buffer)
	buf.ReadFrom(message.BodyReader)
	errorStr := buf.String()
	// If the error is not wrapped, then append the original error string.
	if og, ok := err.(*Result); ok {
	og.Format = og.Format + "%s"
	og.Args = append(og.Args, errorStr)
	err = og
	} else {
	err = NewResult(res.StatusCode, "%w: %s", err, errorStr)
	}
	}
	}
	}
	return err