Added new archive command

This commit is contained in:
bytedream 2022-03-22 19:39:43 +01:00
parent f65cef84ca
commit b239353039

View file

@ -0,0 +1,798 @@
package cmd
import (
"archive/tar"
"archive/zip"
"bufio"
"bytes"
"compress/gzip"
"context"
"fmt"
"github.com/ByteDream/crunchyroll-go"
"github.com/ByteDream/crunchyroll-go/utils"
"github.com/grafov/m3u8"
"github.com/spf13/cobra"
"io"
"os"
"os/exec"
"os/signal"
"path/filepath"
"regexp"
"runtime"
"sort"
"strconv"
"strings"
"sync"
"time"
)
var (
archiveLanguagesFlag []string
archiveDirectoryFlag string
archiveOutputFlag string
archiveMergeFlag string
archiveCompressFlag string
archiveResolutionFlag string
archiveGoroutinesFlag int
)
var archiveCmd = &cobra.Command{
Use: "archive",
Short: "Stores the given videos with all subtitles and multiple audios in a .mkv file",
Args: cobra.MinimumNArgs(1),
PreRunE: func(cmd *cobra.Command, args []string) error {
out.Debug("Validating arguments")
if !hasFFmpeg() {
return fmt.Errorf("ffmpeg is needed to run this command correctly")
}
out.Debug("FFmpeg detected")
if filepath.Ext(archiveOutputFlag) != ".mkv" {
return fmt.Errorf("currently only matroska / .mkv files are supported")
}
for _, locale := range archiveLanguagesFlag {
if !utils.ValidateLocale(crunchyroll.LOCALE(locale)) {
// if locale is 'all', match all known locales
if locale == "all" {
archiveLanguagesFlag = allLocalesAsStrings()
break
}
return fmt.Errorf("%s is not a valid locale. Choose from: %s", locale, strings.Join(allLocalesAsStrings(), ", "))
}
}
out.Debug("Using following audio locales: %s", strings.Join(archiveLanguagesFlag, ", "))
var found bool
for _, mode := range []string{"auto", "audio", "video"} {
if archiveMergeFlag == mode {
out.Debug("Using %s merge behavior", archiveMergeFlag)
found = true
break
}
}
if !found {
return fmt.Errorf("'%s' is no valid merge flag. Use 'auto', 'audio' or 'video'", archiveMergeFlag)
}
if archiveCompressFlag != "" {
found = false
for _, algo := range []string{".tar", ".tar.gz", ".tgz", ".zip"} {
if strings.HasSuffix(archiveCompressFlag, algo) {
out.Debug("Using %s compression", algo)
found = true
break
}
}
if !found {
return fmt.Errorf("'%s' is no valid compress algorithm. Valid algorithms / file endings are '.tar', '.tar.gz', '.zip'",
archiveCompressFlag)
}
}
switch archiveResolutionFlag {
case "1080p", "720p", "480p", "360p", "240p":
intRes, _ := strconv.ParseFloat(strings.TrimSuffix(archiveResolutionFlag, "p"), 84)
archiveResolutionFlag = fmt.Sprintf("%dx%s", int(intRes*(16/9)), strings.TrimSuffix(archiveResolutionFlag, "p"))
case "1920x1080", "1280x720", "640x480", "480x360", "428x240", "best", "worst":
default:
return fmt.Errorf("'%s' is not a valid resolution", archiveResolutionFlag)
}
out.Debug("Using resolution '%s'", archiveResolutionFlag)
return nil
},
RunE: func(cmd *cobra.Command, args []string) error {
loadCrunchy()
return archive(args)
},
}
func init() {
archiveCmd.Flags().StringSliceVarP(&archiveLanguagesFlag,
"language",
"l",
[]string{string(systemLocale(false)), string(crunchyroll.JP)},
"Audio locale which should be downloaded. Can be used multiple times")
cwd, _ := os.Getwd()
archiveCmd.Flags().StringVarP(&archiveDirectoryFlag,
"directory",
"d",
cwd,
"The directory to store the files into")
archiveCmd.Flags().StringVarP(&archiveOutputFlag,
"output",
"o",
"{title}.mkv",
"Name of the output file. If you use the following things in the name, the will get replaced:\n"+
"\t{title} » Title of the video\n"+
"\t{series_name} » Name of the series\n"+
"\t{season_name} » Name of the season\n"+
"\t{season_number} » Number of the season\n"+
"\t{episode_number} » Number of the episode\n"+
"\t{resolution} » Resolution of the video\n"+
"\t{fps} » Frame Rate of the video\n"+
"\t{audio} » Audio locale of the video\n"+
"\t{subtitle} » Subtitle locale of the video")
archiveCmd.Flags().StringVarP(&archiveMergeFlag,
"merge",
"m",
"auto",
"Sets the behavior of the stream merging. Valid behaviors are 'auto', 'audio', 'video'")
archiveCmd.Flags().StringVarP(&archiveCompressFlag,
"compress",
"c",
"",
"If is set, all output will be compresses into an archive (every url generates a new one). "+
"This flag sets the name of the compressed output file. The file ending specifies the compression algorithm. "+
"The following algorithms are supported: gzip, tar, zip")
archiveCmd.Flags().StringVarP(&archiveResolutionFlag,
"resolution",
"r",
"best",
"The video resolution. Can either be specified via the pixels, the abbreviation for pixels, or 'common-use' words\n"+
"\tAvailable pixels: 1920x1080, 1280x720, 640x480, 480x360, 428x240\n"+
"\tAvailable abbreviations: 1080p, 720p, 480p, 360p, 240p\n"+
"\tAvailable common-use words: best (best available resolution), worst (worst available resolution)")
archiveCmd.Flags().IntVarP(&archiveGoroutinesFlag,
"goroutines",
"g",
runtime.NumCPU(),
"Number of parallel segment downloads")
rootCmd.AddCommand(archiveCmd)
}
func archive(urls []string) error {
for i, url := range urls {
out.SetProgress("Parsing url %d", i+1)
episodes, err := archiveExtractEpisodes(url)
if err != nil {
out.StopProgress("Failed to parse url %d", i+1)
return err
}
out.StopProgress("Parsed url %d", i+1)
var compressFile *os.File
var c compress
if archiveCompressFlag != "" {
compressFile, err = os.Create(generateFilename(archiveCompressFlag, ""))
if err != nil {
return fmt.Errorf("failed to create archive file: %v", err)
}
if strings.HasSuffix(archiveCompressFlag, ".tar") {
c = newTarCompress(compressFile)
} else if strings.HasSuffix(archiveCompressFlag, ".tar.gz") || strings.HasSuffix(archiveCompressFlag, ".tgz") {
c = newGzipCompress(compressFile)
} else if strings.HasSuffix(archiveCompressFlag, ".zip") {
c = newZipCompress(compressFile)
}
}
for _, season := range episodes {
out.Info("%s Season %d", season[0].SeriesName, season[0].SeasonNumber)
for j, info := range season {
out.Info("\t%d. %s » %spx, %.2f FPS (S%02dE%02d)",
j+1,
info.Title,
info.Resolution,
info.FPS,
info.SeasonNumber,
info.EpisodeNumber)
}
}
out.Empty()
for _, season := range episodes {
for _, info := range season {
var filename string
var writeCloser io.WriteCloser
if c != nil {
filename = info.Format(archiveOutputFlag)
writeCloser, err = c.NewFile(info)
if err != nil {
return fmt.Errorf("failed to pre generate new archive file: %v", err)
}
} else {
dir := info.Format(downloadDirectoryFlag)
if _, err = os.Stat(dir); os.IsNotExist(err) {
if err = os.MkdirAll(dir, 0777); err != nil {
return fmt.Errorf("error while creating directory: %v", err)
}
}
filename = generateFilename(info.Format(archiveOutputFlag), dir)
writeCloser, err = os.Create(filename)
if err != nil {
return fmt.Errorf("failed to create new file: %v", err)
}
}
if err = archiveInfo(info, writeCloser, filename); err != nil {
writeCloser.Close()
if f, ok := writeCloser.(*os.File); ok {
os.Remove(f.Name())
} else {
c.Close()
compressFile.Close()
os.RemoveAll(compressFile.Name())
}
return err
}
writeCloser.Close()
}
}
if c != nil {
c.Close()
}
if compressFile != nil {
compressFile.Close()
}
}
return nil
}
func archiveInfo(info formatInformation, writeCloser io.WriteCloser, filename string) error {
out.Debug("Entering season %d, episode %d with %d additional formats", info.SeasonNumber, info.EpisodeNumber, len(info.additionalFormats))
downloadProgress, err := createArchiveProgress(info)
if err != nil {
return fmt.Errorf("error while setting up downloader: %v", err)
}
rootFile, err := os.CreateTemp("", fmt.Sprintf("%s_*.ts", strings.TrimSuffix(filepath.Base(filename), filepath.Ext(filename))))
if err != nil {
return fmt.Errorf("failed to create temp file: %v", err)
}
defer os.Remove(rootFile.Name())
defer rootFile.Close()
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
downloader := crunchyroll.NewDownloader(ctx, rootFile, downloadGoroutinesFlag, func(segment *m3u8.MediaSegment, current, total int, file *os.File) error {
// check if the context was cancelled.
// must be done in to not print any progress messages if ctrl+c was pressed
if ctx.Err() != nil {
return nil
}
if out.IsDev() {
downloadProgress.UpdateMessage(fmt.Sprintf("Downloading %d/%d (%.2f%%) » %s", current, total, float32(current)/float32(total)*100, segment.URI), false)
} else {
downloadProgress.Update()
}
if current == total {
downloadProgress.UpdateMessage("Merging segments", false)
}
return nil
})
sig := make(chan os.Signal, 1)
signal.Notify(sig, os.Interrupt)
go func() {
select {
case <-sig:
signal.Stop(sig)
out.Exit("Exiting... (may take a few seconds)")
out.Exit("To force exit press ctrl+c (again)")
cancel()
// os.Exit(1) is not called since an immediate exit after the cancel function does not let
// the download process enough time to stop gratefully. A result of this is that the temporary
// directory where the segments are downloaded to will not be deleted
case <-ctx.Done():
// this is just here to end the goroutine and prevent it from running forever without a reason
}
}()
out.Debug("Set up signal catcher")
var additionalDownloaderOpts []string
var mergeMessage string
switch archiveMergeFlag {
case "auto":
additionalDownloaderOpts = []string{"-vn"}
for _, format := range info.additionalFormats {
if format.Video.Bandwidth != info.format.Video.Bandwidth {
// revoke the changed FFmpegOpts above
additionalDownloaderOpts = []string{}
break
}
}
if len(additionalDownloaderOpts) > 0 {
mergeMessage = "merging audio for additional formats"
} else {
mergeMessage = "merging video for additional formats"
}
case "audio":
additionalDownloaderOpts = []string{"-vn"}
mergeMessage = "merging audio for additional formats"
case "video":
mergeMessage = "merging video for additional formats"
}
out.Info("Downloading episode `%s` to `%s` (%s)", info.Title, filepath.Base(filename), mergeMessage)
out.Info("\tEpisode: S%02dE%02d", info.SeasonNumber, info.EpisodeNumber)
out.Info("\tAudio: %s", info.Audio)
out.Info("\tSubtitle: %s", info.Subtitle)
out.Info("\tResolution: %spx", info.Resolution)
out.Info("\tFPS: %.2f", info.FPS)
var videoFiles, audioFiles, subtitleFiles []string
defer func() {
for _, f := range append(append(videoFiles, audioFiles...), subtitleFiles...) {
os.RemoveAll(f)
}
}()
var f []string
if f, err = archiveDownloadVideos(downloader, filepath.Base(filename), true, info.format); err != nil {
if err != ctx.Err() {
return fmt.Errorf("error while downloading: %v", err)
}
return err
}
videoFiles = append(videoFiles, f[0])
if len(additionalDownloaderOpts) == 0 {
var videos []string
downloader.FFmpegOpts = additionalDownloaderOpts
if videos, err = archiveDownloadVideos(downloader, filepath.Base(filename), true, info.additionalFormats...); err != nil {
return fmt.Errorf("error while downloading additional videos: %v", err)
}
downloader.FFmpegOpts = []string{}
videoFiles = append(videoFiles, videos...)
} else {
var audios []string
if audios, err = archiveDownloadVideos(downloader, filepath.Base(filename), false, info.additionalFormats...); err != nil {
return fmt.Errorf("error while downloading additional videos: %v", err)
}
audioFiles = append(audioFiles, audios...)
}
sort.Sort(utils.SubtitlesByLocale(info.format.Subtitles))
if len(archiveLanguagesFlag) > 0 && archiveLanguagesFlag[0] != "all" {
for j, language := range archiveLanguagesFlag {
locale := crunchyroll.LOCALE(language)
for k, subtitle := range info.format.Subtitles {
if subtitle.Locale == locale {
info.format.Subtitles = append(info.format.Subtitles[:k], info.format.Subtitles[k+1:]...)
info.format.Subtitles = append(info.format.Subtitles[:j], append([]*crunchyroll.Subtitle{subtitle}, info.format.Subtitles[j:]...)...)
break
}
}
}
}
var subtitles []string
if subtitles, err = archiveDownloadSubtitles(filepath.Base(filename), info.format.Subtitles...); err != nil {
return fmt.Errorf("error while downloading subtitles: %v", err)
}
subtitleFiles = append(subtitleFiles, subtitles...)
if err = archiveFFmpeg(ctx, writeCloser, videoFiles, audioFiles, subtitleFiles); err != nil {
return fmt.Errorf("failed to merge files: %v", err)
}
downloadProgress.UpdateMessage("Download finished", false)
signal.Stop(sig)
out.Debug("Stopped signal catcher")
out.Empty()
out.Empty()
return nil
}
func createArchiveProgress(info formatInformation) (*downloadProgress, error) {
var progressCount int
if err := info.format.InitVideo(); err != nil {
return nil, fmt.Errorf("error while initializing a video: %v", err)
}
// + number of segments a video has +1 is for merging
progressCount += int(info.format.Video.Chunklist.Count()) + 1
for _, f := range info.additionalFormats {
if f == info.format {
continue
}
if err := f.InitVideo(); err != nil {
return nil, err
}
// + number of segments a video has +1 is for merging
progressCount += int(f.Video.Chunklist.Count()) + 1
}
downloadProgress := &downloadProgress{
Prefix: out.InfoLog.Prefix(),
Message: "Downloading video",
// number of segments a video +1 is for the success message
Total: progressCount + 1,
Dev: out.IsDev(),
Quiet: out.IsQuiet(),
}
if out.IsDev() {
downloadProgress.Prefix = out.DebugLog.Prefix()
}
return downloadProgress, nil
}
func archiveDownloadVideos(downloader crunchyroll.Downloader, filename string, video bool, formats ...*crunchyroll.Format) ([]string, error) {
var files []string
for _, format := range formats {
var name string
if video {
name = fmt.Sprintf("%s_%s_video_*.ts", filename, format.AudioLocale)
} else {
name = fmt.Sprintf("%s_%s_audio_*.aac", filename, format.AudioLocale)
}
f, err := os.CreateTemp("", name)
if err != nil {
return nil, err
}
files = append(files, f.Name())
downloader.Writer = f
if err = format.Download(downloader); err != nil {
f.Close()
for _, file := range files {
os.Remove(file)
}
return nil, err
}
f.Close()
out.Debug("Downloaded '%s' video", format.AudioLocale)
}
return files, nil
}
func archiveDownloadSubtitles(filename string, subtitles ...*crunchyroll.Subtitle) ([]string, error) {
var files []string
for _, subtitle := range subtitles {
f, err := os.CreateTemp("", fmt.Sprintf("%s_%s_subtitle_*.ass", filename, subtitle.Locale))
if err != nil {
return nil, err
}
files = append(files, f.Name())
if err := subtitle.Save(f); err != nil {
f.Close()
for _, file := range files {
os.Remove(file)
}
return nil, err
}
f.Close()
out.Debug("Downloaded '%s' subtitles", subtitle.Locale)
}
return files, nil
}
func archiveFFmpeg(ctx context.Context, dst io.Writer, videoFiles, audioFiles, subtitleFiles []string) error {
var input, maps, metadata []string
re := regexp.MustCompile(`(?m)_([a-z]{2}-([A-Z]{2}|[0-9]{3}))_(video|audio|subtitle)`)
for i, video := range videoFiles {
input = append(input, "-i", video)
maps = append(maps, "-map", strconv.Itoa(i))
locale := crunchyroll.LOCALE(re.FindStringSubmatch(video)[1])
metadata = append(metadata, fmt.Sprintf("-metadata:s:v:%d", i), fmt.Sprintf("language=%s", utils.LocaleLanguage(locale)))
metadata = append(metadata, fmt.Sprintf("-metadata:s:a:%d", i), fmt.Sprintf("language=%s", utils.LocaleLanguage(locale)))
}
for i, audio := range audioFiles {
input = append(input, "-i", audio)
maps = append(maps, "-map", strconv.Itoa(i+len(videoFiles)))
locale := crunchyroll.LOCALE(re.FindStringSubmatch(audio)[1])
metadata = append(metadata, fmt.Sprintf("-metadata:s:a:%d", i), fmt.Sprintf("language=%s", utils.LocaleLanguage(locale)))
}
for i, subtitle := range subtitleFiles {
input = append(input, "-i", subtitle)
maps = append(maps, "-map", strconv.Itoa(i+len(videoFiles)+len(audioFiles)))
locale := crunchyroll.LOCALE(re.FindStringSubmatch(subtitle)[1])
metadata = append(metadata, fmt.Sprintf("-metadata:s:s:%d", i), fmt.Sprintf("title=%s", utils.LocaleLanguage(locale)))
}
commandOptions := []string{"-y"}
commandOptions = append(commandOptions, input...)
commandOptions = append(commandOptions, maps...)
commandOptions = append(commandOptions, metadata...)
// we have to create a temporary file here because it must be seekable
// for ffmpeg.
// ffmpeg could write to dst too, but this would require to re-encode
// the audio which results in much higher time and resource consumption
// (0-1 second with the temp file, ~20 seconds with re-encoding on my system)
file, err := os.CreateTemp("", "")
if err != nil {
return err
}
file.Close()
defer os.Remove(file.Name())
commandOptions = append(commandOptions, "-c", "copy", "-f", "matroska", file.Name())
// just a little nicer debug output to copy and paste the ffmpeg for debug reasons
if out.IsDev() {
var debugOptions []string
for _, option := range commandOptions {
if strings.HasPrefix(option, "title=") {
debugOptions = append(debugOptions, "title=\""+strings.TrimPrefix(option, "title=")+"\"")
} else if strings.HasPrefix(option, "language=") {
debugOptions = append(debugOptions, "language=\""+strings.TrimPrefix(option, "language=")+"\"")
} else if strings.Contains(option, " ") {
debugOptions = append(debugOptions, "\""+option+"\"")
} else {
debugOptions = append(debugOptions, option)
}
}
out.Debug("FFmpeg merge command: ffmpeg %s", strings.Join(debugOptions, " "))
}
var errBuf bytes.Buffer
cmd := exec.CommandContext(ctx, "ffmpeg", commandOptions...)
cmd.Stderr = &errBuf
if err = cmd.Run(); err != nil {
return fmt.Errorf(errBuf.String())
}
file, err = os.Open(file.Name())
if err != nil {
return err
}
defer file.Close()
_, err = bufio.NewWriter(dst).ReadFrom(file)
return err
}
func archiveExtractEpisodes(url string) ([][]formatInformation, error) {
var hasJapanese bool
languagesAsLocale := []crunchyroll.LOCALE{crunchyroll.JP}
for _, language := range archiveLanguagesFlag {
locale := crunchyroll.LOCALE(language)
if locale == crunchyroll.JP {
hasJapanese = true
} else {
languagesAsLocale = append(languagesAsLocale, locale)
}
}
episodes, err := extractEpisodes(url, languagesAsLocale...)
if err != nil {
return nil, err
}
if !hasJapanese && len(episodes[1:]) == 0 {
return nil, fmt.Errorf("no episodes found")
}
for i, eps := range episodes {
if len(eps) == 0 {
out.SetProgress("%s has no matching episodes", languagesAsLocale[i])
} else if len(episodes[0]) > len(eps) {
out.SetProgress("%s has %d less episodes than existing in japanese (%d)", languagesAsLocale[i], len(episodes[0])-len(eps), len(episodes[0]))
}
}
if !hasJapanese {
episodes = episodes[1:]
}
eps := make(map[int]map[int]*formatInformation)
for _, lang := range episodes {
for _, season := range utils.SortEpisodesBySeason(lang) {
if _, ok := eps[season[0].SeasonNumber]; !ok {
eps[season[0].SeasonNumber] = map[int]*formatInformation{}
}
for _, episode := range season {
format, err := episode.GetFormat(archiveResolutionFlag, "", false)
if err != nil {
return nil, fmt.Errorf("error while receiving format for %s: %v", episode.Title, err)
}
if _, ok := eps[episode.SeasonNumber][episode.EpisodeNumber]; !ok {
eps[episode.SeasonNumber][episode.EpisodeNumber] = &formatInformation{
format: format,
additionalFormats: make([]*crunchyroll.Format, 0),
Title: episode.Title,
SeriesName: episode.SeriesTitle,
SeasonName: episode.SeasonTitle,
SeasonNumber: episode.SeasonNumber,
EpisodeNumber: episode.EpisodeNumber,
Resolution: format.Video.Resolution,
FPS: format.Video.FrameRate,
Audio: format.AudioLocale,
}
} else {
eps[episode.SeasonNumber][episode.EpisodeNumber].additionalFormats = append(eps[episode.SeasonNumber][episode.EpisodeNumber].additionalFormats, format)
}
}
}
}
var infoFormat [][]formatInformation
for _, e := range eps {
var tmpFormatInfo []formatInformation
var keys []int
for episodeNumber := range e {
keys = append(keys, episodeNumber)
}
sort.Ints(keys)
for _, key := range keys {
tmpFormatInfo = append(tmpFormatInfo, *e[key])
}
infoFormat = append(infoFormat, tmpFormatInfo)
}
return infoFormat, nil
}
type compress interface {
io.Closer
NewFile(information formatInformation) (io.WriteCloser, error)
}
func newGzipCompress(file *os.File) *tarCompress {
gw := gzip.NewWriter(file)
return &tarCompress{
parent: gw,
dst: tar.NewWriter(gw),
}
}
func newTarCompress(file *os.File) *tarCompress {
return &tarCompress{
dst: tar.NewWriter(file),
}
}
type tarCompress struct {
compress
wg sync.WaitGroup
parent *gzip.Writer
dst *tar.Writer
}
func (tc *tarCompress) Close() error {
// we have to wait here in case the actual content isn't copied completely into the
// writer yet
tc.wg.Wait()
var err, err2 error
if tc.parent != nil {
err2 = tc.parent.Close()
}
err = tc.dst.Close()
if err != nil && err2 != nil {
// best way to show double errors at once that i've found
return fmt.Errorf("%v\n%v", err, err2)
} else if err == nil && err2 != nil {
err = err2
}
return err
}
func (tc *tarCompress) NewFile(information formatInformation) (io.WriteCloser, error) {
rp, wp := io.Pipe()
go func() {
tc.wg.Add(1)
defer tc.wg.Done()
var buf bytes.Buffer
io.Copy(&buf, rp)
header := &tar.Header{
Name: filepath.Join(fmt.Sprintf("S%2d", information.SeasonNumber), information.Title),
ModTime: time.Now(),
Mode: 0644,
Typeflag: tar.TypeReg,
// fun fact: i did not set the size for quiet some time because i thought that it isn't
// required. well because of this i debugged this part for multiple hours because without
// proper size information only a tiny amount gets copied into the tar (or zip) writer.
// this is also the reason why the file content is completely copied into a buffer before
// writing it to the writer. i could bypass this and save some memory but this requires
// some rewriting and im nearly at the (planned) finish for version 2 so nah in the future
// maybe
Size: int64(buf.Len()),
}
tc.dst.WriteHeader(header)
io.Copy(tc.dst, &buf)
}()
return wp, nil
}
func newZipCompress(file *os.File) *zipCompress {
return &zipCompress{
dst: zip.NewWriter(file),
}
}
type zipCompress struct {
compress
wg sync.WaitGroup
dst *zip.Writer
}
func (zc *zipCompress) Close() error {
zc.wg.Wait()
return zc.dst.Close()
}
func (zc *zipCompress) NewFile(information formatInformation) (io.WriteCloser, error) {
rp, wp := io.Pipe()
go func() {
zc.wg.Add(1)
defer zc.wg.Done()
var buf bytes.Buffer
io.Copy(&buf, rp)
header := &zip.FileHeader{
Name: filepath.Join(fmt.Sprintf("S%2d", information.SeasonNumber), information.Title),
Modified: time.Now(),
Method: zip.Deflate,
UncompressedSize64: uint64(buf.Len()),
}
header.SetMode(0644)
hw, _ := zc.dst.CreateHeader(header)
io.Copy(hw, &buf)
}()
return wp, nil
}