91 lines
1.7 KiB
Go
91 lines
1.7 KiB
Go
package fs
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import (
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"archive/zip"
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"io"
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"os"
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"strings"
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)
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// ZipFiles compresses one or many files into a single zip archive file.
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// Param 1: filename is the output zip file's name.
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// Param 2: files is a list of files to add to the zip.
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func Zip(filename string, files []string) error {
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newZipFile, err := os.Create(filename)
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if err != nil {
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return err
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}
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defer newZipFile.Close()
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zipWriter := zip.NewWriter(newZipFile)
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defer zipWriter.Close()
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// Add files to zip
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for _, file := range files {
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if err = AddToZip(zipWriter, file); err != nil {
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return err
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}
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}
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return nil
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}
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func AddToZip(zipWriter *zip.Writer, filename string) error {
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fileToZip, err := os.Open(filename)
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if err != nil {
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return err
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}
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defer fileToZip.Close()
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// Get the file information
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info, err := fileToZip.Stat()
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if err != nil {
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return err
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}
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header, err := zip.FileInfoHeader(info)
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if err != nil {
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return err
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}
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// Change to deflate to gain better compression
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// see http://golang.org/pkg/archive/zip/#pkg-constants
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header.Method = zip.Deflate
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writer, err := zipWriter.CreateHeader(header)
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if err != nil {
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return err
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}
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_, err = io.Copy(writer, fileToZip)
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return err
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}
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// Extract Zip file in destination directory
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func Unzip(src, dest string) (fileNames []string, err error) {
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r, err := zip.OpenReader(src)
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if err != nil {
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return fileNames, err
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}
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defer r.Close()
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for _, f := range r.File {
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// Skip directories like __OSX and potentially malicious file names containing "..".
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if strings.HasPrefix(f.Name, "__") || strings.Contains(f.Name, "..") {
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continue
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}
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fn, err := copyToFile(f, dest)
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if err != nil {
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return fileNames, err
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}
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fileNames = append(fileNames, fn)
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}
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return fileNames, nil
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}
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