golang tar gzip压缩，解压（含目录文件）

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转载：http://www.3fwork.com/b208/000119MYM031848/

golang tar gzip压缩，解压（含目录文件） tar是用于文件归档，gzip用于压缩。仅仅用tar的话，达不到压缩的目的。我们常见的tar.gz就是用gzip压缩生成的tar归档文件。

go实现tar压缩与解压与zip类似，区别在于tar需要使用gzip进行处理。tar与zip的Header不同。代码如下

package tartestimport ("archive/tar""compress/gzip""io""os""strings")//压缩 使用gzip压缩成tar.gzfunc Compress(files []*os.File, dest string) error {d, _ := os.Create(dest)defer d.Close()gw := gzip.NewWriter(d)defer gw.Close()tw := tar.NewWriter(gw)defer tw.Close()for _, file := range files {err := compress(file, "", tw)if err != nil {return err}}return nil}func compress(file *os.File, prefix string, tw *tar.Writer) error {info, err := file.Stat()if err != nil {return err}if info.IsDir() {prefix = prefix + "/" + info.Name()fileInfos, err := file.Readdir(-1)if err != nil {return err}for _, fi := range fileInfos {f, err := os.Open(file.Name() + "/" + fi.Name())if err != nil {return err}err = compress(f, prefix, tw)if err != nil {return err}}} else {header, err := tar.FileInfoHeader(info, "")header.Name = prefix + "/" + header.Nameif err != nil {return err}err = tw.WriteHeader(header)if err != nil {return err}_, err = io.Copy(tw, file)file.Close()if err != nil {return err}}return nil}//解压 tar.gzfunc DeCompress(tarFile, dest string) error {srcFile, err := os.Open(tarFile)if err != nil {return err}defer srcFile.Close()gr, err := gzip.NewReader(srcFile)if err != nil {return err}defer gr.Close()tr := tar.NewReader(gr)for {hdr, err := tr.Next()if err != nil {if err == io.EOF {break} else {return err}}filename := dest + hdr.Namefile, err := createFile(filename)if err != nil {return err}io.Copy(file, tr)}return nil}func createFile(name string) (*os.File, error) {err := os.MkdirAll(string([]rune(name)[0:strings.LastIndex(name, "/")]), 0755)if err != nil {return nil, err}return os.Create(name)}

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