func GetObject(c *oss.Client, fpath, opath string) {
bytes, err := c.GetObject(opath, -1, -1)
if err != nil {
log.Fatalln(err)
}
file, err := os.Create(fpath)
if err != nil {
log.Fatalln(err)
}
defer file.Close()
file.Write(bytes)
fmt.Println("Get object ok")
}
