func()

in lambda/handler.go [253:274]

• 20 lines of code
• 6 McCabe index (conditional complexity)

func (h handlerFunc) Invoke(ctx context.Context, payload []byte) ([]byte, error) {
	response, err := h(ctx, payload)
	if err != nil {
		return nil, err
	}
	// if the response needs to be closed (ex: net.Conn, os.File), ensure it's closed before the next invoke to prevent a resource leak
	if response, ok := response.(io.Closer); ok {
		defer response.Close()
	}
	// optimization: if the response is a *bytes.Buffer, a copy can be eliminated
	switch response := response.(type) {
	case *jsonOutBuffer:
		return response.Bytes(), nil
	case *bytes.Buffer:
		return response.Bytes(), nil
	}
	b, err := ioutil.ReadAll(response)
	if err != nil {
		return nil, err
	}
	return b, nil
}