// Copyright 2024 CoreOS, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package util

import (
	"bytes"
	"compress/gzip"
	"io"
	"net/http"
)

func TryUnzip(raw []byte) ([]byte, error) {
	if http.DetectContentType(raw) != "application/x-gzip" {
		return raw, nil
	}

	reader, err := gzip.NewReader(bytes.NewReader(raw))
	if err != nil {
		return nil, err
	}
	defer func() {
		_ = reader.Close()
	}()

	return io.ReadAll(reader)
}
