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package putils
import (
"fmt"
"io"
"net/http"
"os"
"path/filepath"
"strconv"
"github.com/pterm/pterm"
)
// progressbarWriter counts the number of bytes written to it and adds those to a progressbar.
type progressbarWriter struct {
Total uint64
pb *pterm.ProgressbarPrinter
}
func (w *progressbarWriter) Write(p []byte) (int, error) {
n := len(p)
w.Total += uint64(n)
w.pb.Add(len(p))
return n, nil
}
// DownloadFileWithProgressbar downloads a file, by url, and writes it to outputPath.
// The download progress, will be reported via a progressbar.
func DownloadFileWithProgressbar(progressbar *pterm.ProgressbarPrinter, outputPath, url string, mode os.FileMode) error {
path := filepath.Clean(outputPath)
out, err := os.Create(path)
if err != nil {
return fmt.Errorf("could not create download path: %w", err)
}
resp, err := http.Get(url) //nolint:gosec
if err != nil {
out.Close()
return fmt.Errorf("error while downloading file: %w", err)
}
defer resp.Body.Close()
counter := &progressbarWriter{}
fileSize, err := strconv.Atoi(resp.Header.Get("Content-Length"))
if err != nil {
return fmt.Errorf("could not determine file size: %w", err)
}
counter.pb, _ = progressbar.WithTotal(fileSize).Start()
if _, err = io.Copy(out, io.TeeReader(resp.Body, counter)); err != nil {
out.Close()
return err
}
err = os.Chmod(path, mode)
if err != nil {
return fmt.Errorf("could not chmod file: %w", err)
}
out.Close()
return nil
}
// DownloadFileWithDefaultProgressbar downloads a file, by url, and writes it to outputPath.
// The download progress, will be reported via the default progressbar.
func DownloadFileWithDefaultProgressbar(title, outputPath, url string, mode os.FileMode) error {
return DownloadFileWithProgressbar(pterm.DefaultProgressbar.WithTitle(title), outputPath, url, mode)
}
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