package debos import ( "fmt" "io" "log" "net/http" "os" ) // Function for downloading single file object with http(s) protocol func DownloadHttpUrl(url, filename string) error { log.Printf("Download started: '%s' -> '%s'\n", url, filename) // TODO: Proxy support? // Check if file object already exists. fi, err := os.Stat(filename) if !os.IsNotExist(err) && !fi.Mode().IsRegular() { return fmt.Errorf("Failed to download '%s': '%s' exists and it is not a regular file\n", url, filename) } resp, err := http.Get(url) if err != nil { return err } defer resp.Body.Close() if resp.StatusCode != http.StatusOK { return fmt.Errorf("Url '%s' returned status code %d (%s)\n", url, resp.StatusCode, http.StatusText(resp.StatusCode)) } // Output file output, err := os.Create(filename) if err != nil { return err } defer output.Close() if _, err := io.Copy(output, resp.Body); err != nil { return err } return nil }