在golang中，如何在一系列重定向后确定最终的URL？

package mainimport (    "fmt"    "log"    "net/http")func main() {    resp, err := http.Get("http://stackoverflow.com/q/16784419/727643")    if err != nil {        log.Fatalf("http.Get => %v", err.Error())    }    // Your magic function. The Request in the Response is the last URL the    // client tried to access.    finalURL := resp.Request.URL.String()    fmt.Printf("The URL you ended up at is: %vn", finalURL)}

输出：

The URL you ended up at is: http://stackoverflow.com/questions/16784419/in-golang-how-to-determine-the-final-url-after-a-series-of-redirects