// 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,
}
}
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
}
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,
}
}
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
}
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
}