tempFiles []*os.File) error { client := &http.Client{} req, err := http.NewRequest("GET", url, nil) if err != nil { return err } req.Header.Add("Range", fmt.Sprintf("bytes=%d-%d", s, e)) req.WithContext(ctx) resp, err := client.Do(req) if err != nil { return err } : func (c *Client) Get(url string) error { : eg, ctx := errgroup.WithContext(context.Background()) tempFiles := make([]*os.File, c.Parallel) : eg.Go(func() error { return rangeGet(ctx, url, s, e, i, tempFiles) }) } : Gopherಓ#1 LTେձ 2018/05/28 - Yoshima Takatada / @shiimaxx