Method Open

reader.go:149–188

Open returns an [io.ReadCloser] that provides access to the [File]'s contents. Multiple files may be read concurrently.

()

// Open returns an [io.ReadCloser] that provides access to the [File]'s
// contents. Multiple files may be read concurrently.
func (f *File) Open() (io.ReadCloser, error) {
	if f.isEmptyStream || f.isEmptyFile {
		// Return empty reader for directory or empty file
		return io.NopCloser(bytes.NewReader(nil)), nil
	}

	rc, _ := f.zip.pool[f.folder].Get(f.offset)
	if rc == nil {
		var (
			encrypted bool
			err       error
		)

		rc, _, encrypted, err = f.zip.folderReader(f.zip.si, f.folder)
		if err != nil {
			return nil, &ReadError{
				Encrypted: encrypted,
				Err:       err,
			}
		}
	}

	if _, err := rc.Seek(f.offset, io.SeekStart); err != nil {
		e := &ReadError{
			Err: err,
		}

		if fr, ok := rc.(*folderReadCloser); ok {
			e.Encrypted = fr.hasEncryption
		}

		return nil, e
	}

	return &fileReader{
		rc: rc,
		f:  f,
		n:  int64(f.UncompressedSize), //nolint:gosec
	}, nil
}

func openReader(fs afero.Fs, name string) (io.ReaderAt, int64, []afero.File, error) {
	f, err := fs.Open(filepath.Clean(name))