Esempio n. 1
1
func getTarFileBytes(file *os.File, path string) ([]byte, error) {
	_, err := file.Seek(0, 0)
	if err != nil {
		fmt.Errorf("error seeking file: %v", err)
	}

	var fileBytes []byte
	fileWalker := func(t *tarball.TarFile) error {
		if filepath.Clean(t.Name()) == path {
			fileBytes, err = ioutil.ReadAll(t.TarStream)
			if err != nil {
				return err
			}
		}

		return nil
	}

	tr := tar.NewReader(file)
	if err := tarball.Walk(*tr, fileWalker); err != nil {
		return nil, err
	}

	if fileBytes == nil {
		return nil, fmt.Errorf("file %q not found", path)
	}

	return fileBytes, nil
}
Esempio n. 2
0
func readLayer(r io.ReadSeeker, id string) (json, version []byte, layer *tar.Reader, err error) {
	if _, err = r.Seek(0, 0); err != nil {
		return
	}

	tr := tar.NewReader(r)
	for {
		var h *tar.Header
		h, err = tr.Next()
		if err == io.EOF {
			return nil, nil, nil, fmt.Errorf("layer not found")
		}
		if err != nil {
			return
		}
		if h.Typeflag != tar.TypeDir || h.Name != id+"/" {
			continue
		}
		if version, err = readFile(tr, id+"/VERSION"); err != nil {
			return
		}
		if json, err = readFile(tr, id+"/json"); err != nil {
			return
		}
		var r io.Reader
		r, err = nextFile(tr, id+"/layer.tar")
		if err != nil {
			return
		}
		layer = tar.NewReader(r)
		return
	}
}
Esempio n. 3
0
func (pa *PixelApi) UpdatePixel(w http.ResponseWriter, r *http.Request) {
	defer r.Body.Close()
	pixel := w.(httptools.VarsResponseWriter).Vars()["pixel"].(*Pixel)

	buf := &bytes.Buffer{}
	io.Copy(buf, r.Body)
	if buf.Len() <= 0 {
		http.Error(w, "Empty fs", http.StatusBadRequest)
		return
	}

	ctr, err := pa.cc.CreateContainer(tar.NewReader(bytes.NewReader(buf.Bytes())), nil)
	if err != nil {
		http.Error(w, err.Error(), http.StatusBadRequest)
		return
	}

	StopContainer(pixel.Container)
	pixel.Container = ctr
	pixel.Filesystem = fsObject(tar.NewReader(bytes.NewReader(buf.Bytes())))
	pixel.LastImage = &bytes.Buffer{}
	pixel.Broken = false
	io.Copy(pixel.LastImage, bytes.NewReader(blackPixel.Bytes()))

	pa.Messages <- &Message{
		Pixel: pixel.Id,
		Type:  TypeChange,
	}

	go pa.pixelListener(pixel)

	http.Error(w, pixel.Id, http.StatusCreated)
}
Esempio n. 4
0
// DetectArchiveCompression takes a source reader and will determine the
// compression type to use, if any. It will return a *tar.Reader that can be
// used to read the archive.
func DetectArchiveCompression(r io.Reader) (*tar.Reader, error) {
	var comp Decompressor

	// setup a buffered reader
	br := bufio.NewReader(r)

	// loop over the registered decompressors to find the right one
	for _, c := range decompressorTypes {
		if c.Detect(br) {
			comp = c
			break
		}
	}

	// Create the reader if a compression handler was found, else fall back on
	// using no compression.
	if comp != nil {
		// Create the reader
		arch, err := comp.NewReader(br)
		if err != nil {
			return nil, err
		}
		defer func() {
			if cl, ok := arch.(io.ReadCloser); ok {
				cl.Close()
			}
		}()
		return tar.NewReader(arch), nil
	}

	return tar.NewReader(br), nil
}
Esempio n. 5
0
// TarFileList ...
func TarFileList(filename string) ([]string, error) {
	reader, err := os.Open(filename)
	if err != nil {
		return nil, err
	}
	defer reader.Close()
	var tarReader *tar.Reader
	if strings.HasSuffix(filename, ".gz") ||
		strings.HasSuffix(filename, ".tgz") {
		gzipReader, err := gzip.NewReader(reader)
		if err != nil {
			return nil, err
		}
		tarReader = tar.NewReader(gzipReader)
	} else {
		tarReader = tar.NewReader(reader)
	}
	var files []string
	for {
		header, err := tarReader.Next()
		if err != nil {
			if err == io.EOF {
				break
			}
			return files, err
		}
		if header == nil {
			break
		}
		files = append(files, header.Name)
	}
	return files, nil
}
Esempio n. 6
0
func (t *TarInfo) Load(file io.ReadSeeker) {
	var reader *tar.Reader
	file.Seek(0, 0)
	gzipReader, err := gzip.NewReader(file)
	if err != nil {
		// likely not a gzip compressed file
		file.Seek(0, 0)
		reader = tar.NewReader(file)
	} else {
		reader = tar.NewReader(gzipReader)
	}
	for {
		header, err := reader.Next()
		if err == io.EOF {
			// end of tar file
			break
		} else if err != nil {
			// error occured
			logger.Debug("[TarInfoLoad] Error when reading tar stream tarsum. Disabling TarSum, TarFilesInfo. Error: %s", err.Error())
			t.Error = TarError(err.Error())
			return
		}
		t.TarSum.Append(header, reader)
		t.TarFilesInfo.Append(header)
	}
}
Esempio n. 7
0
File: extract.go Progetto: bvp/gtvm
func tarFilesCount(sourcefile string) int {
	flreader, _ := os.Open(sourcefile)
	defer flreader.Close()
	var fltarReader *tar.Reader
	var flReader io.ReadCloser = flreader

	if strings.HasSuffix(sourcefile, ".gz") ||
		strings.HasSuffix(sourcefile, ".tgz") {
		flgzipReader, err := gzip.NewReader(flreader)
		checkErr("In tarFilesCounter - NewReader", err)
		fltarReader = tar.NewReader(flgzipReader)
		defer flReader.Close()
	} else if strings.HasSuffix(sourcefile, ".bz2") {
		flbz2Reader := bzip2.NewReader(flreader)
		fltarReader = tar.NewReader(flbz2Reader)
	} else {
		fltarReader = tar.NewReader(flreader)
	}

	trfl := fltarReader
	counter := 0
	for {
		_, err := trfl.Next()
		if err != nil {
			if err == io.EOF {
				break
			}
			checkErr("Extract error::ReadTarArchive", err)
		}
		counter++
	}
	fmt.Println("Files in archive -", counter)
	return counter
}
Esempio n. 8
0
// getTarReader returns a TarReaderCloser associated with the specified io.Reader.
//
// Gzip/Bzip2/XZ detection is done by using the magic numbers:
// Gzip: the first two bytes should be 0x1f and 0x8b. Defined in the RFC1952.
// Bzip2: the first three bytes should be 0x42, 0x5a and 0x68. No RFC.
// XZ: the first three bytes should be 0xfd, 0x37, 0x7a, 0x58, 0x5a, 0x00. No RFC.
func getTarReader(r io.Reader) (*TarReadCloser, error) {
	br := bufio.NewReader(r)
	header, err := br.Peek(readLen)
	if err == nil {
		switch {
		case bytes.HasPrefix(header, gzipHeader):
			gr, err := gzip.NewReader(br)
			if err != nil {
				return nil, err
			}
			return &TarReadCloser{tar.NewReader(gr), gr}, nil
		case bytes.HasPrefix(header, bzip2Header):
			bzip2r := ioutil.NopCloser(bzip2.NewReader(br))
			return &TarReadCloser{tar.NewReader(bzip2r), bzip2r}, nil
		case bytes.HasPrefix(header, xzHeader):
			xzr, err := NewXzReader(br)
			if err != nil {
				return nil, err
			}
			return &TarReadCloser{tar.NewReader(xzr), xzr}, nil
		}
	}

	dr := ioutil.NopCloser(br)
	return &TarReadCloser{tar.NewReader(dr), dr}, nil
}
Esempio n. 9
0
func extractBz2(body []byte, location string) (string, error) {
	bodyCopy := make([]byte, len(body))
	copy(bodyCopy, body)
	tarFile := bzip2.NewReader(bytes.NewReader(body))
	tarReader := tar.NewReader(tarFile)

	var dirList []string

	for {
		header, err := tarReader.Next()
		if err == io.EOF {
			break
		}
		dirList = append(dirList, header.Name)
	}

	basedir := findBaseDir(dirList)

	tarFile = bzip2.NewReader(bytes.NewReader(bodyCopy))
	tarReader = tar.NewReader(tarFile)

	for {
		header, err := tarReader.Next()
		if err == io.EOF {
			break
		} else if err != nil {
			//return location, err
		}

		path := filepath.Join(location, strings.Replace(header.Name, basedir, "", -1))
		info := header.FileInfo()

		if info.IsDir() {
			if err = os.MkdirAll(path, info.Mode()); err != nil {
				return location, err
			}
			continue
		}

		if header.Typeflag == tar.TypeSymlink {
			err = os.Symlink(header.Linkname, path)
			continue
		}

		file, err := os.OpenFile(path, os.O_CREATE|os.O_TRUNC|os.O_WRONLY, info.Mode())
		if err == nil {
			defer file.Close()
		}
		_, err = io.Copy(file, tarReader)
		if err != nil {
			//return location, err
		}
	}
	return location, nil
}
Esempio n. 10
0
// Ungzip and untar from source file to destination directory
// you need check file exist before you call this function
func UnTarGz(srcFilePath string, destDirPath string) error {
	//fmt.Println("UnTarGzing " + srcFilePath + "...")
	// Create destination directory
	os.Mkdir(destDirPath, os.ModePerm)
	var tr *tar.Reader
	fr, err := os.Open(srcFilePath)
	if err != nil {
		return err
	}
	defer fr.Close()

	if strings.HasSuffix(srcFilePath, ".bz2") {
		br := bzip2.NewReader(fr)
		tr = tar.NewReader(br)
	} else {
		// Gzip reader
		gr, err := gzip.NewReader(fr)
		if err != nil {
			return err
		}
		defer gr.Close()
		// Tar reader
		tr = tar.NewReader(gr)
	}

	for {
		hdr, err := tr.Next()
		if err == io.EOF {
			// End of tar archive
			break
		}
		//handleError(err)
		//fmt.Println("UnTarGzing file..." + hdr.Name)
		// Check if it is diretory or file
		if hdr.Typeflag != tar.TypeDir {
			// Get files from archive
			// Create diretory before create file
			os.MkdirAll(destDirPath+"/"+path.Dir(hdr.Name), os.ModePerm)
			// Write data to file
			fw, _ := os.Create(destDirPath + "/" + hdr.Name)

			os.Chmod(destDirPath+"/"+hdr.Name, os.FileMode(hdr.Mode))

			if err != nil {
				return err
			}
			_, err = io.Copy(fw, tr)
			if err != nil {
				return err
			}
		}
	}
	//fmt.Println("Well done!")
	return nil
}
Esempio n. 11
0
// Extract unpacks the tar reader that was passed into New(). This is
// broken out from new to give the caller time to set various
// settings in the Untar object.
func (u *Untar) Extract() error {
	// check for detect mode before the main setup, we'll change compression
	// to the intended type and setup a new reader to re-read the header
	switch u.Compression {
	case NONE:
		u.archive = tar.NewReader(u.source)

	case DETECT:
		arch, err := DetectArchiveCompression(u.source)
		if err != nil {
			return err
		}
		u.archive = arch

	default:
		// Look up the compression handler
		comp, exists := decompressorTypes[string(u.Compression)]
		if !exists {
			return fmt.Errorf("unrecognized decompression type %q", u.Compression)
		}

		// Create the reader
		arch, err := comp.NewReader(u.source)
		if err != nil {
			return err
		}
		defer func() {
			if cl, ok := arch.(io.ReadCloser); ok {
				cl.Close()
			}
		}()
		u.archive = tar.NewReader(arch)
	}

	for {
		header, err := u.archive.Next()
		if err == io.EOF {
			// EOF, ok, break to return
			break
		}
		if err != nil {
			// See note on logging above.
			return err
		}

		err = u.processEntry(header)
		if err != nil {
			// See note on logging above.
			return err
		}
	}

	return nil
}
Esempio n. 12
0
func TestPortAssignment(t *testing.T) {
	buf := makeFs(map[string]interface{}{
		"main.go": `package main

		import (
			"fmt"
			"os"
		)

		func main() {
			fmt.Printf("127.0.0.1:%s", os.Getenv("PORT"))
		}`,
	})
	fs := tar.NewReader(bytes.NewReader(buf))

	ctr1, err := lcc.CreateContainer(fs, nil)
	if err != nil {
		t.Fatalf("Could not start container: %s", err)
	}
	go ctr1.Cleanup()

	timer := time.AfterFunc(1*time.Second, func() {
		t.Fatalf("Timeout occured")
	})
	ctr1.Wait()
	timer.Stop()

	fs = tar.NewReader(bytes.NewReader(buf))
	ctr2, err := lcc.CreateContainer(fs, nil)
	if err != nil {
		t.Fatalf("Could not start container: %s", err)
	}
	go ctr2.Cleanup()

	timer = time.AfterFunc(1*time.Second, func() {
		t.Fatalf("Timeout occured")
	})
	ctr2.Wait()
	timer.Stop()

	if ctr1.Logs() != ctr1.Address().String() {
		t.Fatalf("Specified and injected ports differ. Injected %s, got %s", ctr1.Address(), ctr1.Logs())
	}
	if ctr2.Logs() != ctr2.Address().String() {
		t.Fatalf("Specified and injected ports differ. Injected %s, got %s", ctr2.Address(), ctr2.Logs())
	}
	if ctr1.Logs() == ctr2.Logs() {
		t.Fatalf("Same port was assigned")
	}
}
Esempio n. 13
0
File: tar.go Progetto: kinvolk/clair
// getTarReader returns a tar.Reader associated with the specified io.Reader,
// optionally backed by a gzip.Reader if gzip compression is detected.
//
// Gzip detection is done by using the magic numbers defined in the RFC1952 :
// the first two bytes should be 0x1f and 0x8b..
func getTarReader(r io.Reader) (*tar.Reader, error) {
	br := bufio.NewReader(r)
	header, err := br.Peek(2)

	if err == nil && bytes.Equal(header, gzipHeader) {
		gr, err := gzip.NewReader(br)
		if err != nil {
			return nil, err
		}
		return tar.NewReader(gr), nil
	}

	return tar.NewReader(br), nil
}
Esempio n. 14
0
func ExampleClient_CopyFromContainer() {
	client, err := docker.NewClient("http://localhost:4243")
	if err != nil {
		log.Fatal(err)
	}
	cid := "a84849"
	var buf bytes.Buffer
	filename := "/tmp/output.txt"
	err = client.CopyFromContainer(docker.CopyFromContainerOptions{
		Container:    cid,
		Resource:     filename,
		OutputStream: &buf,
	})
	if err != nil {
		log.Fatalf("Error while copying from %s: %s\n", cid, err)
	}
	content := new(bytes.Buffer)
	r := bytes.NewReader(buf.Bytes())
	tr := tar.NewReader(r)
	tr.Next()
	if err != nil && err != io.EOF {
		log.Fatal(err)
	}
	if _, err := io.Copy(content, tr); err != nil {
		log.Fatal(err)
	}
	log.Println(buf.String())
}
Esempio n. 15
0
func fetchCamliSrc() {
	check(os.MkdirAll("/gopath/src/camlistore.org", 0777))
	check(os.Chdir("/gopath/src/camlistore.org"))

	res, err := http.Get("https://camlistore.googlesource.com/camlistore/+archive/" + *rev + ".tar.gz")
	check(err)
	defer res.Body.Close()
	gz, err := gzip.NewReader(res.Body)
	check(err)
	defer gz.Close()
	tr := tar.NewReader(gz)
	for {
		h, err := tr.Next()
		if err == io.EOF {
			break
		}
		check(err)
		if h.Typeflag == tar.TypeDir {
			check(os.MkdirAll(h.Name, os.FileMode(h.Mode)))
			continue
		}
		f, err := os.Create(h.Name)
		check(err)
		n, err := io.Copy(f, tr)
		if err != nil && err != io.EOF {
			log.Fatal(err)
		}
		if n != h.Size {
			log.Fatalf("Error when creating %v: wanted %v bytes, got %v bytes", h.Name, h.Size, n)
		}
		check(f.Close())
	}
}
Esempio n. 16
0
func testArchiveStr(t *testing.T, path string) []string {
	f, err := os.Open(path)
	if err != nil {
		t.Fatalf("err: %s", err)
	}
	defer f.Close()

	// Ungzip
	gzipR, err := gzip.NewReader(f)
	if err != nil {
		t.Fatalf("err: %s", err)
	}

	// Accumulator
	result := make([]string, 0, 10)

	// Untar
	tarR := tar.NewReader(gzipR)
	for {
		header, err := tarR.Next()
		if err == io.EOF {
			break
		}
		if err != nil {
			t.Fatalf("err: %s", err)
		}

		result = append(result, header.Name)
	}

	sort.Strings(result)
	return result
}
func (s *DockerSuite) TestContainerApiCopy(c *check.C) {
	testRequires(c, DaemonIsLinux)
	name := "test-container-api-copy"
	dockerCmd(c, "run", "--name", name, "busybox", "touch", "/test.txt")

	postData := types.CopyConfig{
		Resource: "/test.txt",
	}

	status, body, err := sockRequest("POST", "/containers/"+name+"/copy", postData)
	c.Assert(err, check.IsNil)
	c.Assert(status, check.Equals, http.StatusOK)

	found := false
	for tarReader := tar.NewReader(bytes.NewReader(body)); ; {
		h, err := tarReader.Next()
		if err != nil {
			if err == io.EOF {
				break
			}
			c.Fatal(err)
		}
		if h.Name == "test.txt" {
			found = true
			break
		}
	}
	c.Assert(found, check.Equals, true)
}
Esempio n. 18
0
func ImportTar(r io.Reader, ds dag.DAGService) (*dag.Node, error) {
	rall, err := ioutil.ReadAll(r)
	if err != nil {
		return nil, err
	}

	r = bytes.NewReader(rall)

	tr := tar.NewReader(r)

	root := new(dag.Node)
	root.Data = []byte("ipfs/tar")

	e := dagutil.NewDagEditor(root, ds)

	for {
		h, err := tr.Next()
		if err != nil {
			if err == io.EOF {
				break
			}
			return nil, err
		}

		header := new(dag.Node)

		headerBytes, err := marshalHeader(h)
		if err != nil {
			return nil, err
		}

		header.Data = headerBytes

		if h.Size > 0 {
			spl := chunk.NewRabin(tr, uint64(chunk.DefaultBlockSize))
			nd, err := importer.BuildDagFromReader(ds, spl)
			if err != nil {
				return nil, err
			}

			err = header.AddNodeLinkClean("data", nd)
			if err != nil {
				return nil, err
			}
		}

		_, err = ds.Add(header)
		if err != nil {
			return nil, err
		}

		path := escapePath(h.Name)
		err = e.InsertNodeAtPath(context.Background(), path, header, func() *dag.Node { return new(dag.Node) })
		if err != nil {
			return nil, err
		}
	}

	return e.Finalize(ds)
}
Esempio n. 19
0
func main() {
	var file *os.File
	var err error

	if file, err = os.Open("files/sample.tar.bz2"); err != nil {
		log.Fatalln(err)
	}
	defer file.Close()

	reader := tar.NewReader(bzip2.NewReader(file))

	var header *tar.Header
	for {
		header, err = reader.Next()
		if err == io.EOF {
			// ファイルの最後
			break
		}
		if err != nil {
			log.Fatalln(err)
		}

		buf := new(bytes.Buffer)
		if _, err = io.Copy(buf, reader); err != nil {
			log.Fatalln(err)
		}

		if err = ioutil.WriteFile("output/"+header.Name, buf.Bytes(), 0755); err != nil {
			log.Fatal(err)
		}
	}
}
Esempio n. 20
0
func (t *TapeArchive) Open(name string) (io.ReadCloser, int64, error) {
	f, err := os.Open(t.path)
	if err != nil {
		return nil, 0, err
	}

	r := tar.NewReader(f)

	for {
		h, err := r.Next()
		if err == io.EOF {
			break
		}
		if err != nil {
			return nil, 0, err
		}

		matched, err := filepath.Match(name, path.Base(h.Name))
		if err != nil {
			return nil, 0, err
		}

		if matched {
			return &TapeArchiveEntry{r, f}, h.Size, nil
		}
	}

	_ = f.Close()

	return nil, 0, os.ErrNotExist
}
func (s *DockerSuite) TestContainerApiGetExport(c *check.C) {
	name := "exportcontainer"
	runCmd := exec.Command(dockerBinary, "run", "--name", name, "busybox", "touch", "/test")
	out, _, err := runCommandWithOutput(runCmd)
	if err != nil {
		c.Fatalf("Error on container creation: %v, output: %q", err, out)
	}

	status, body, err := sockRequest("GET", "/containers/"+name+"/export", nil)
	c.Assert(status, check.Equals, http.StatusOK)
	c.Assert(err, check.IsNil)

	found := false
	for tarReader := tar.NewReader(bytes.NewReader(body)); ; {
		h, err := tarReader.Next()
		if err != nil {
			if err == io.EOF {
				break
			}
			c.Fatal(err)
		}
		if h.Name == "test" {
			found = true
			break
		}
	}

	if !found {
		c.Fatalf("The created test file has not been found in the exported image")
	}
}
Esempio n. 22
0
func prepareRepo(cacheKey string) (string, error) {
	path, err := ioutil.TempDir("", "repo-"+cacheKey)
	if err != nil {
		return "", err
	}

	res, err := http.Get(blobstoreCacheURL(cacheKey))
	if err != nil {
		return "", err
	}
	defer res.Body.Close()

	if res.StatusCode == 404 {
		return path, initRepo(path)
	}
	if res.StatusCode != 200 {
		return "", fmt.Errorf("unexpected error %d retrieving cached repo", res.StatusCode)
	}

	r := tar.NewReader(res.Body)
	if err := archiver.Untar(path, r); err != nil {
		return "", err
	}
	if err := writeRepoHook(path); err != nil {
		return "", err
	}

	return path, nil
}
Esempio n. 23
0
func checkToolsContent(c *gc.C, data []byte, uploaded string) {
	zr, err := gzip.NewReader(bytes.NewReader(data))
	c.Check(err, gc.IsNil)
	defer zr.Close()
	tr := tar.NewReader(zr)
	found := false
	for {
		hdr, err := tr.Next()
		if err == io.EOF {
			break
		}
		c.Check(err, gc.IsNil)
		if strings.ContainsAny(hdr.Name, "/\\") {
			c.Fail()
		}
		if hdr.Typeflag != tar.TypeReg {
			c.Fail()
		}
		content, err := ioutil.ReadAll(tr)
		c.Check(err, gc.IsNil)
		c.Check(string(content), gc.Equals, uploaded)
		found = true
	}
	c.Check(found, jc.IsTrue)
}
Esempio n. 24
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// guiVersion retrieves the GUI version from the juju-gui-* directory included
// in the bz2 archive at the given path.
func guiVersion(path string) (version.Number, error) {
	var number version.Number
	f, err := os.Open(path)
	if err != nil {
		return number, errors.Annotate(err, "cannot open Juju GUI archive")
	}
	defer f.Close()
	prefix := "jujugui-"
	r := tar.NewReader(bzip2.NewReader(f))
	for {
		hdr, err := r.Next()
		if err == io.EOF {
			break
		}
		if err != nil {
			return number, errors.New("cannot read Juju GUI archive")
		}
		info := hdr.FileInfo()
		if !info.IsDir() || !strings.HasPrefix(hdr.Name, prefix) {
			continue
		}
		n := info.Name()[len(prefix):]
		number, err = version.Parse(n)
		if err != nil {
			return number, errors.Errorf("cannot parse version %q", n)
		}
		return number, nil
	}
	return number, errors.New("cannot find Juju GUI version")
}
Esempio n. 25
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// Some tar have both GNU specific (huge uid) and Ustar specific (long name) things.
// Not supposed to happen (should use PAX instead of Ustar for long name) but it does and it should still work.
func TestUntarUstarGnuConflict(t *testing.T) {
	f, err := os.Open("testdata/broken.tar")
	if err != nil {
		t.Fatal(err)
	}
	defer f.Close()

	found := false
	tr := tar.NewReader(f)
	// Iterate through the files in the archive.
	for {
		hdr, err := tr.Next()
		if err == io.EOF {
			// end of tar archive
			break
		}
		if err != nil {
			t.Fatal(err)
		}
		if hdr.Name == "root/.cpanm/work/1395823785.24209/Plack-1.0030/blib/man3/Plack::Middleware::LighttpdScriptNameFix.3pm" {
			found = true
			break
		}
	}
	if !found {
		t.Fatalf("%s not found in the archive", "root/.cpanm/work/1395823785.24209/Plack-1.0030/blib/man3/Plack::Middleware::LighttpdScriptNameFix.3pm")
	}
}
Esempio n. 26
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File: file.go Progetto: matomesc/rkt
// NewCompressedTarReader creates a new TarReadCloser reading from the
// given ACI image.
// It is the caller's responsibility to call Close on the TarReadCloser
// when done.
func NewCompressedTarReader(rs io.ReadSeeker) (*TarReadCloser, error) {
	cr, err := NewCompressedReader(rs)
	if err != nil {
		return nil, err
	}
	return &TarReadCloser{tar.NewReader(cr), cr}, nil
}
Esempio n. 27
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func getParent(file *os.File, imgID string) (string, error) {
	var parent string

	_, err := file.Seek(0, 0)
	if err != nil {
		return "", fmt.Errorf("error seeking file: %v", err)
	}

	jsonPath := filepath.Join(imgID, "json")
	parentWalker := func(t *tarball.TarFile) error {
		if filepath.Clean(t.Name()) == jsonPath {
			jsonb, err := ioutil.ReadAll(t.TarStream)
			if err != nil {
				return fmt.Errorf("error reading layer json: %v", err)
			}

			var dockerData types.DockerImageData
			if err := json.Unmarshal(jsonb, &dockerData); err != nil {
				return fmt.Errorf("error unmarshaling layer data: %v", err)
			}

			parent = dockerData.Parent
		}

		return nil
	}

	tr := tar.NewReader(file)
	if err := tarball.Walk(*tr, parentWalker); err != nil {
		return "", err
	}

	return parent, nil
}
Esempio n. 28
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// Download pulls a file out of a container using `docker cp`. We have a source
// path and want to write to an io.Writer, not a file. We use - to make docker
// cp to write to stdout, and then copy the stream to our destination io.Writer.
func (c *Communicator) Download(src string, dst io.Writer) error {
	log.Printf("Downloading file from container: %s:%s", c.ContainerId, src)
	localCmd := exec.Command("docker", "cp", fmt.Sprintf("%s:%s", c.ContainerId, src), "-")

	pipe, err := localCmd.StdoutPipe()
	if err != nil {
		return fmt.Errorf("Failed to open pipe: %s", err)
	}

	if err = localCmd.Start(); err != nil {
		return fmt.Errorf("Failed to start download: %s", err)
	}

	// When you use - to send docker cp to stdout it is streamed as a tar; this
	// enables it to work with directories. We don't actually support
	// directories in Download() but we still need to handle the tar format.
	archive := tar.NewReader(pipe)
	_, err = archive.Next()
	if err != nil {
		return fmt.Errorf("Failed to read header from tar stream: %s", err)
	}

	numBytes, err := io.Copy(dst, archive)
	if err != nil {
		return fmt.Errorf("Failed to pipe download: %s", err)
	}
	log.Printf("Copied %d bytes for %s", numBytes, src)

	if err = localCmd.Wait(); err != nil {
		return fmt.Errorf("Failed to download '%s' from container: %s", src, err)
	}

	return nil
}
func (s *DockerSuite) TestContainerApiGetExport(c *check.C) {
	testRequires(c, DaemonIsLinux)
	name := "exportcontainer"
	dockerCmd(c, "run", "--name", name, "busybox", "touch", "/test")

	status, body, err := sockRequest("GET", "/containers/"+name+"/export", nil)
	c.Assert(err, check.IsNil)
	c.Assert(status, check.Equals, http.StatusOK)

	found := false
	for tarReader := tar.NewReader(bytes.NewReader(body)); ; {
		h, err := tarReader.Next()
		if err != nil {
			if err == io.EOF {
				break
			}
			c.Fatal(err)
		}
		if h.Name == "test" {
			found = true
			break
		}
	}

	if !found {
		c.Fatalf("The created test file has not been found in the exported image")
	}
}
Esempio n. 30
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// fetchFile fetches the specified directory from the given buildlet, and
// writes the first file it finds in that directory to dest.
func (b *Build) fetchFile(client *buildlet.Client, dest, dir string) error {
	b.logf("Downloading file from %q.", dir)
	tgz, err := client.GetTar(dir)
	if err != nil {
		return err
	}
	defer tgz.Close()
	zr, err := gzip.NewReader(tgz)
	if err != nil {
		return err
	}
	tr := tar.NewReader(zr)
	for {
		h, err := tr.Next()
		if err == io.EOF {
			return io.ErrUnexpectedEOF
		}
		if err != nil {
			return err
		}
		if !h.FileInfo().IsDir() {
			break
		}
	}
	return b.writeFile(dest, tr)
}