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package storage
import (
"compress/zlib"
"io"
)
// decompressingReadCloser wraps zlib.NewReader to ensure that both the zlib
// reader and its underlying type are closed.
type decompressingReadCloser struct {
r io.ReadCloser
zr io.ReadCloser
}
// newDecompressingReadCloser creates a new wrapped zlib reader
func newDecompressingReadCloser(r io.ReadCloser) (io.ReadCloser, error) {
zr, err := zlib.NewReader(r)
if err != nil {
return nil, err
}
return &decompressingReadCloser{r: r, zr: zr}, nil
}
// Read implements io.ReadCloser.
func (d *decompressingReadCloser) Read(b []byte) (int, error) {
return d.zr.Read(b)
}
// Close implements io.ReadCloser.
func (d *decompressingReadCloser) Close() error {
if err := d.zr.Close(); err != nil {
return err
}
return d.r.Close()
}
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