Function Unmarshal

gzenv/gzenv.go:38–69

Unmarshal restores the gzenv format back into a Go object

(gzenv string, obj interface{})

// Unmarshal restores the gzenv format back into a Go object
func Unmarshal(gzenv string, obj interface{}) error {
	gzenv = strings.TrimSpace(gzenv)

	data, err := base64.URLEncoding.DecodeString(gzenv)
	if err != nil {
		return fmt.Errorf("unmarshal() base64 decoding: %w", err)
	}

	zlibReader := bytes.NewReader(data)
	w, err := zlib.NewReader(zlibReader)
	if err != nil {
		return fmt.Errorf("unmarshal() zlib opening: %w", err)
	}

	envData := bytes.NewBuffer([]byte{})
	// G110: Potential DoS vulnerability via decompression bomb (gosec)
	// #nosec
	_, err = io.Copy(envData, w)
	if err != nil {
		return fmt.Errorf("unmarshal() zlib decoding: %w", err)
	}
	if err := w.Close(); err != nil {
		log.Printf("Warning: failed to close zlib reader: %v", err)
	}

	err = json.Unmarshal(envData.Bytes(), &obj)
	if err != nil {
		return fmt.Errorf("unmarshal() json parsing: %w", err)
	}

	return nil
}