github.com/sealerio/sealer@v0.11.1-0.20240507115618-f4f89c5853ae/build/kubefile/parser/file_fetcher.go (about)

     1  // Copyright © 2022 Alibaba Group Holding Ltd.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package parser
    16  
    17  import (
    18  	"io"
    19  	"net/http"
    20  	"net/url"
    21  	"os"
    22  	"path"
    23  	"path/filepath"
    24  
    25  	"github.com/pkg/errors"
    26  	"github.com/sirupsen/logrus"
    27  )
    28  
    29  func getFileFromURL(src, rename, mountPoint string) (filePath string, err error) {
    30  	url, err := url.Parse(src)
    31  	if err != nil {
    32  		return "", err
    33  	}
    34  	response, err := http.Get(src) /* #nosec G107 */
    35  	if err != nil {
    36  		return "", err
    37  	}
    38  	defer func(Body io.ReadCloser) {
    39  		err := Body.Close()
    40  		if err != nil {
    41  			logrus.Warnf("failed to close http reader")
    42  		}
    43  	}(response.Body)
    44  	// Figure out what to name the new content.
    45  	name := rename
    46  	if name == "" {
    47  		name = path.Base(url.Path)
    48  	}
    49  	target := filepath.Clean(filepath.Join(mountPoint, name))
    50  	f, err := os.Create(target)
    51  	if err != nil {
    52  		return "", errors.Wrapf(err, "error creating file to target %s for %s", target, src)
    53  	}
    54  	defer func() {
    55  		_ = f.Close()
    56  	}()
    57  	_, err = io.Copy(f, response.Body)
    58  	if err != nil {
    59  		return "", errors.Wrapf(err, "error writing %q to temporary file %q", src, f.Name())
    60  	}
    61  	return target, nil
    62  }