求帮忙

```go func getThumbMediaId(image_path string) (*mediaclient.MediaInfo, string) { fmt.Println("getThumbMediaId is running...") var media_client = mediaclient.NewClient(AccessTokenServer, nil) mediainfo, error := media_client.UploadThumb("../my/haishi_news/06-news/images/" + image_path) var err string if error != nil { fmt.Println("错误是：", error) err = fmt.Sprint(error) fmt.Println(err) } return mediainfo, err } ``` 上面这段代码，想把那个err输出给前台页面的，求指教。