Esempio n. 1
0
// getIoProgressReader returns a reader that wraps the HTTP response
// body, so it prints a pretty progress bar when reading data from it.
func getIoProgressReader(label string, res *http.Response) io.Reader {
	prefix := "Downloading " + label
	fmtBytesSize := 18
	barSize := int64(80 - len(prefix) - fmtBytesSize)
	bar := ioprogress.DrawTextFormatBarForW(barSize, os.Stderr)
	fmtfunc := func(progress, total int64) string {
		// Content-Length is set to -1 when unknown.
		if total == -1 {
			return fmt.Sprintf(
				"%s: %v of an unknown total size",
				prefix,
				ioprogress.ByteUnitStr(progress),
			)
		}
		return fmt.Sprintf(
			"%s: %s %s",
			prefix,
			bar(progress, total),
			ioprogress.DrawTextFormatBytes(progress, total),
		)
	}
	return &ioprogress.Reader{
		Reader:       res.Body,
		Size:         res.ContentLength,
		DrawFunc:     ioprogress.DrawTerminalf(os.Stderr, fmtfunc),
		DrawInterval: time.Second,
	}
}
Esempio n. 2
0
File: push.go Progetto: nyodas/cnt
func genProgressBar(file *os.File, label string) (io.Reader, error) {
	finfo, err := file.Stat()
	if err != nil {
		return nil, err
	}

	var prefix string
	if label != "" {
		prefix = "Uploading " + label
	} else {
		prefix = "Uploading"
	}
	fmtBytesSize := 18
	barSize := int64(80 - len(prefix) - fmtBytesSize)
	bar := ioprogress.DrawTextFormatBarForW(barSize, os.Stderr)
	fmtfunc := func(progress, total int64) string {
		// Content-Length is set to -1 when unknown.
		if total == -1 {
			return fmt.Sprintf(
				"%s: %v of an unknown total size",
				prefix,
				ioprogress.ByteUnitStr(progress),
			)
		}
		return fmt.Sprintf(
			"%s: %s %s",
			prefix,
			bar(progress, total),
			ioprogress.DrawTextFormatBytes(progress, total),
		)
	}
	return &ioprogress.Reader{
		Reader:       file,
		Size:         finfo.Size(),
		DrawFunc:     ioprogress.DrawTerminalf(os.Stderr, fmtfunc),
		DrawInterval: time.Second,
	}, nil
}
Esempio n. 3
0
func newIoprogress(label string, size int64, rdr io.Reader) io.Reader {
	prefix := "Downloading " + label
	fmtBytesSize := 18

	// if barSize < 2, drawing the bar will panic; 3 will at least give a spinny
	// thing.
	barSize := int64(80 - len(prefix) - fmtBytesSize)
	if barSize < 2 {
		barSize = 2
	}

	bar := ioprogress.DrawTextFormatBarForW(barSize, os.Stderr)
	fmtfunc := func(progress, total int64) string {
		// Content-Length is set to -1 when unknown.
		if total == -1 {
			return fmt.Sprintf(
				"%s: %v of an unknown total size",
				prefix,
				ioprogress.ByteUnitStr(progress),
			)
		}
		return fmt.Sprintf(
			"%s: %s %s",
			prefix,
			bar(progress, total),
			ioprogress.DrawTextFormatBytes(progress, total),
		)
	}

	return &ioprogress.Reader{
		Reader:       rdr,
		Size:         size,
		DrawFunc:     ioprogress.DrawTerminalf(os.Stderr, fmtfunc),
		DrawInterval: time.Second,
	}
}
Esempio n. 4
0
func (rb *RepositoryBackend) getLayerV1(imgID, registry string, repoData *RepoData, imgSize int64, tmpDir string) (*os.File, error) {
	client := util.GetTLSClient(rb.insecure.SkipVerify)
	req, err := http.NewRequest("GET", rb.schema+path.Join(registry, "images", imgID, "layer"), nil)
	if err != nil {
		return nil, err
	}

	setAuthTokenV1(req, repoData.Tokens)
	setCookieV1(req, repoData.Cookie)

	res, err := client.Do(req)
	if err != nil {
		return nil, err
	}
	defer res.Body.Close()

	if res.StatusCode != 200 {
		res.Body.Close()
		return nil, &httpStatusErr{res.StatusCode, req.URL}
	}

	// if we didn't receive the size via X-Docker-Size when we retrieved the
	// layer's json, try Content-Length
	if imgSize == -1 {
		if hdr := res.Header.Get("Content-Length"); hdr != "" {
			imgSize, err = strconv.ParseInt(hdr, 10, 64)
			if err != nil {
				return nil, err
			}
		}
	}

	prefix := "Downloading " + imgID[:12]
	fmtBytesSize := 18
	barSize := int64(80 - len(prefix) - fmtBytesSize)
	bar := ioprogress.DrawTextFormatBarForW(barSize, os.Stderr)
	fmtfunc := func(progress, total int64) string {
		return fmt.Sprintf(
			"%s: %s %s",
			prefix,
			bar(progress, total),
			ioprogress.DrawTextFormatBytes(progress, total),
		)
	}

	progressReader := &ioprogress.Reader{
		Reader:       res.Body,
		Size:         imgSize,
		DrawFunc:     ioprogress.DrawTerminalf(os.Stderr, fmtfunc),
		DrawInterval: 500 * time.Millisecond,
	}

	layerFile, err := ioutil.TempFile(tmpDir, "dockerlayer-")
	if err != nil {
		return nil, err
	}

	_, err = io.Copy(layerFile, progressReader)
	if err != nil {
		return nil, err
	}

	if err := layerFile.Sync(); err != nil {
		return nil, err
	}

	return layerFile, nil
}
Esempio n. 5
0
func (rb *RepositoryBackend) getLayerV2(layerID string, dockerURL *types.ParsedDockerURL, tmpDir string) (*os.File, error) {
	url := rb.schema + path.Join(dockerURL.IndexURL, "v2", dockerURL.ImageName, "blobs", layerID)
	req, err := http.NewRequest("GET", url, nil)
	if err != nil {
		return nil, err
	}

	rb.setBasicAuth(req)

	res, err := rb.makeRequest(req, dockerURL.ImageName)
	if err != nil {
		return nil, err
	}
	defer res.Body.Close()

	if res.StatusCode == http.StatusTemporaryRedirect || res.StatusCode == http.StatusFound {
		location := res.Header.Get("Location")
		if location != "" {
			req, err = http.NewRequest("GET", location, nil)
			if err != nil {
				return nil, err
			}
			res, err = rb.makeRequest(req, dockerURL.ImageName)
			if err != nil {
				return nil, err
			}
			defer res.Body.Close()
		}
	}

	if res.StatusCode != http.StatusOK {
		return nil, fmt.Errorf("HTTP code: %d. URL: %s", res.StatusCode, req.URL)
	}

	var in io.Reader
	in = res.Body

	if hdr := res.Header.Get("Content-Length"); hdr != "" {
		imgSize, err := strconv.ParseInt(hdr, 10, 64)
		if err != nil {
			return nil, err
		}

		prefix := "Downloading " + layerID[:18]
		fmtBytesSize := 18
		barSize := int64(80 - len(prefix) - fmtBytesSize)
		bar := ioprogress.DrawTextFormatBarForW(barSize, os.Stderr)
		fmtfunc := func(progress, total int64) string {
			return fmt.Sprintf(
				"%s: %s %s",
				prefix,
				bar(progress, total),
				ioprogress.DrawTextFormatBytes(progress, total),
			)
		}
		in = &ioprogress.Reader{
			Reader:       res.Body,
			Size:         imgSize,
			DrawFunc:     ioprogress.DrawTerminalf(os.Stderr, fmtfunc),
			DrawInterval: 500 * time.Millisecond,
		}
	}

	layerFile, err := ioutil.TempFile(tmpDir, "dockerlayer-")
	if err != nil {
		return nil, err
	}

	_, err = io.Copy(layerFile, in)
	if err != nil {
		return nil, err
	}

	if err := layerFile.Sync(); err != nil {
		return nil, err
	}

	return layerFile, nil
}