Example to download a file from url and save on local
io.Copy()
read 32kb (maximum) from input and write to output reapeatly, so dont need worry about memory.
func DownloadFile(filepath string, url string) error {
// Create the file
out, err := os.Create(filepath)
if err != nil {
return err
}
defer out.Close()
// Get the data
resp, err := http.Get(url)
if err != nil {
return err
}
defer resp.Body.Close()
// Write the body to file
_, err = io.Copy(out, resp.Body)
if err != nil {
return err
}
return nil
}
reference: Code Example