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cc-backend/internal/util/compress.go

78 lines
1.6 KiB
Go

// Copyright (C) NHR@FAU, University Erlangen-Nuremberg.
// All rights reserved.
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file.
package util
import (
"compress/gzip"
"io"
"os"
"github.com/ClusterCockpit/cc-backend/pkg/log"
)
func CompressFile(fileIn string, fileOut string) error {
originalFile, err := os.Open(fileIn)
if err != nil {
log.Errorf("CompressFile() error: %v", err)
return err
}
defer originalFile.Close()
gzippedFile, err := os.Create(fileOut)
if err != nil {
log.Errorf("CompressFile() error: %v", err)
return err
}
defer gzippedFile.Close()
gzipWriter := gzip.NewWriter(gzippedFile)
defer gzipWriter.Close()
_, err = io.Copy(gzipWriter, originalFile)
if err != nil {
log.Errorf("CompressFile() error: %v", err)
return err
}
gzipWriter.Flush()
if err := os.Remove(fileIn); err != nil {
log.Errorf("CompressFile() error: %v", err)
return err
}
return nil
}
func UncompressFile(fileIn string, fileOut string) error {
gzippedFile, err := os.Open(fileIn)
if err != nil {
log.Errorf("UncompressFile() error: %v", err)
return err
}
defer gzippedFile.Close()
gzipReader, _ := gzip.NewReader(gzippedFile)
defer gzipReader.Close()
uncompressedFile, err := os.Create(fileOut)
if err != nil {
log.Errorf("UncompressFile() error: %v", err)
return err
}
defer uncompressedFile.Close()
_, err = io.Copy(uncompressedFile, gzipReader)
if err != nil {
log.Errorf("UncompressFile() error: %v", err)
return err
}
if err := os.Remove(fileIn); err != nil {
log.Errorf("UncompressFile() error: %v", err)
return err
}
return nil
}