Esempio n. 1
0
// ExtractTarStreamFromTarReader extracts files from a given tar stream.
// Times out if reading from the stream for any given file
// exceeds the value of timeout
func (t *stiTar) ExtractTarStreamFromTarReader(dir string, tarReader Reader, logger io.Writer) error {
	err := util.TimeoutAfter(t.timeout, "", func(timeoutTimer *time.Timer) error {
		for {
			header, err := tarReader.Next()
			if !timeoutTimer.Stop() {
				return &util.TimeoutError{}
			}
			timeoutTimer.Reset(t.timeout)
			if err == io.EOF {
				return nil
			}
			if err != nil {
				glog.Errorf("Error reading next tar header: %v", err)
				return err
			}
			if header.FileInfo().IsDir() {
				dirPath := filepath.Join(dir, header.Name)
				glog.V(3).Infof("Creating directory %s", dirPath)
				if err = os.MkdirAll(dirPath, 0700); err != nil {
					glog.Errorf("Error creating dir %q: %v", dirPath, err)
					return err
				}
			} else {
				fileDir := filepath.Dir(header.Name)
				dirPath := filepath.Join(dir, fileDir)
				glog.V(3).Infof("Creating directory %s", dirPath)
				if err = os.MkdirAll(dirPath, 0700); err != nil {
					glog.Errorf("Error creating dir %q: %v", dirPath, err)
					return err
				}
				if header.Typeflag == tar.TypeSymlink {
					if err := t.extractLink(dir, header, tarReader); err != nil {
						glog.Errorf("Error extracting link %q: %v", header.Name, err)
						return err
					}
					continue
				}
				logFile(logger, header.Name)
				if err := t.extractFile(dir, header, tarReader); err != nil {
					glog.Errorf("Error extracting file %q: %v", header.Name, err)
					return err
				}
			}
		}
	})

	if err != nil {
		glog.Error("Error extracting tar stream")
	} else {
		glog.V(2).Info("Done extracting tar stream")
	}

	if util.IsTimeoutError(err) {
		err = s2ierr.NewTarTimeoutError()
	}

	return err
}
Esempio n. 2
0
// ExtractTarStream extracts files from a given tar stream.
// Times out if reading from the stream for any given file
// exceeds the value of timeout
func (t *stiTar) ExtractTarStream(dir string, reader io.Reader) error {
	tarReader := tar.NewReader(reader)
	errorChannel := make(chan error)
	timeout := t.timeout
	timeoutTimer := time.NewTimer(timeout)
	go func() {
		for {
			header, err := tarReader.Next()
			timeoutTimer.Reset(timeout)
			if err == io.EOF {
				errorChannel <- nil
				break
			}
			if err != nil {
				glog.Errorf("Error reading next tar header: %v", err)
				errorChannel <- err
				break
			}
			if header.FileInfo().IsDir() {
				dirPath := filepath.Join(dir, header.Name)
				if err = os.MkdirAll(dirPath, 0700); err != nil {
					glog.Errorf("Error creating dir %s: %v", dirPath, err)
					errorChannel <- err
					break
				}
			} else {
				fileDir := filepath.Dir(header.Name)
				dirPath := filepath.Join(dir, fileDir)
				if err = os.MkdirAll(dirPath, 0700); err != nil {
					glog.Errorf("Error creating dir %s: %v", dirPath, err)
					errorChannel <- err
					break
				}
				if err := extractFile(dir, header, tarReader); err != nil {
					glog.Errorf("Error extracting file %s: %v", header.Name, err)
					errorChannel <- err
				}
			}
		}
	}()

	for {
		select {
		case err := <-errorChannel:
			if err != nil {
				glog.Errorf("Error extracting tar stream")
			} else {
				glog.V(2).Infof("Done extracting tar stream")
			}
			return err
		case <-timeoutTimer.C:
			return errors.NewTarTimeoutError()
		}
	}
}
Esempio n. 3
0
// ExtractTarStreamFromTarReader extracts files from a given tar stream.
// Times out if reading from the stream for any given file
// exceeds the value of timeout
func (t *stiTar) ExtractTarStreamFromTarReader(dir string, tarReader Reader, logger io.Writer) error {
	errorChannel := make(chan error, 1)
	timeoutTimer := time.NewTimer(t.timeout)
	go func() {
		for {
			header, err := tarReader.Next()
			if !timeoutTimer.Stop() {
				break
			}
			timeoutTimer.Reset(t.timeout)
			if err == io.EOF {
				errorChannel <- nil
				break
			}
			if err != nil {
				glog.Errorf("Error reading next tar header: %v", err)
				errorChannel <- err
				break
			}
			if header.FileInfo().IsDir() {
				dirPath := filepath.Join(dir, header.Name)
				glog.V(3).Infof("Creating directory %s", dirPath)
				if err = os.MkdirAll(dirPath, 0700); err != nil {
					glog.Errorf("Error creating dir %q: %v", dirPath, err)
					errorChannel <- err
					break
				}
			} else {
				fileDir := filepath.Dir(header.Name)
				dirPath := filepath.Join(dir, fileDir)
				glog.V(3).Infof("Creating directory %s", dirPath)
				if err = os.MkdirAll(dirPath, 0700); err != nil {
					glog.Errorf("Error creating dir %q: %v", dirPath, err)
					errorChannel <- err
					break
				}
				if header.Typeflag == tar.TypeSymlink {
					if err := extractLink(dir, header, tarReader); err != nil {
						glog.Errorf("Error extracting link %q: %v", header.Name, err)
						errorChannel <- err
						break
					}
					continue
				}
				logFile(logger, header.Name)
				if err := extractFile(dir, header, tarReader); err != nil {
					glog.Errorf("Error extracting file %q: %v", header.Name, err)
					errorChannel <- err
					break
				}
			}
		}
	}()

	for {
		select {
		case err := <-errorChannel:
			if err != nil {
				glog.Error("Error extracting tar stream")
			} else {
				glog.V(2).Info("Done extracting tar stream")
			}
			return err
		case <-timeoutTimer.C:
			return errors.NewTarTimeoutError()
		}
	}
}