XML to JSON in Go the PostData Structure

handler.go

type PostData struct {
	Channel struct {
		Posts []struct {
			Title       string   `xml:"title"`
			Link        string   `xml:"link"`
			Category    []string `xml:"category"`
			Creator     string   `xml:"creator"`
			PubDate     string   `xml:"pubDate"`
			Updated     string   `xml:"updated"`
			License     string   `xml:"license"`
			Encoded     string   `xml:"encoded"`
			Description string   `xml:"description"`
		} `xml:"item"`
	} `xml:"channel"`
}

// Handle a serverless request
func Handle(req []byte) string {
  //...
}