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136 lines
3.3 KiB
Go
136 lines
3.3 KiB
Go
// Copyright GoFrame Author(https://goframe.org). All Rights Reserved.
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//
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// This Source Code Form is subject to the terms of the MIT License.
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// If a copy of the MIT was not distributed with this file,
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// You can obtain one at https://github.com/gogf/gf.
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package gcompress
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import (
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"bytes"
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"compress/gzip"
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"io"
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"github.com/gogf/gf/v2/errors/gerror"
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"github.com/gogf/gf/v2/os/gfile"
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)
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// Gzip compresses `data` using gzip algorithm.
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// The optional parameter `level` specifies the compression level from
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// 1 to 9 which means from none to the best compression.
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//
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// Note that it returns error if given `level` is invalid.
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func Gzip(data []byte, level ...int) ([]byte, error) {
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var (
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writer *gzip.Writer
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buf bytes.Buffer
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err error
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)
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if len(level) > 0 {
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writer, err = gzip.NewWriterLevel(&buf, level[0])
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if err != nil {
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err = gerror.Wrapf(err, `gzip.NewWriterLevel failed for level "%d"`, level[0])
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return nil, err
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}
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} else {
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writer = gzip.NewWriter(&buf)
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}
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if _, err = writer.Write(data); err != nil {
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err = gerror.Wrap(err, `writer.Write failed`)
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return nil, err
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}
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if err = writer.Close(); err != nil {
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err = gerror.Wrap(err, `writer.Close failed`)
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return nil, err
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}
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return buf.Bytes(), nil
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}
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// GzipFile compresses the file `src` to `dst` using gzip algorithm.
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func GzipFile(srcFilePath, dstFilePath string, level ...int) (err error) {
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dstFile, err := gfile.Create(dstFilePath)
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if err != nil {
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return err
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}
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defer dstFile.Close()
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return GzipPathWriter(srcFilePath, dstFile, level...)
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}
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// GzipPathWriter compresses `filePath` to `writer` using gzip compressing algorithm.
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//
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// Note that the parameter `path` can be either a directory or a file.
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func GzipPathWriter(filePath string, writer io.Writer, level ...int) error {
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var (
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gzipWriter *gzip.Writer
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err error
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)
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srcFile, err := gfile.Open(filePath)
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if err != nil {
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return err
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}
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defer srcFile.Close()
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if len(level) > 0 {
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gzipWriter, err = gzip.NewWriterLevel(writer, level[0])
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if err != nil {
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return gerror.Wrap(err, `gzip.NewWriterLevel failed`)
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}
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} else {
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gzipWriter = gzip.NewWriter(writer)
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}
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defer gzipWriter.Close()
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if _, err = io.Copy(gzipWriter, srcFile); err != nil {
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err = gerror.Wrap(err, `io.Copy failed`)
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return err
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}
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return nil
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}
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// UnGzip decompresses `data` with gzip algorithm.
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func UnGzip(data []byte) ([]byte, error) {
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var buf bytes.Buffer
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reader, err := gzip.NewReader(bytes.NewReader(data))
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if err != nil {
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err = gerror.Wrap(err, `gzip.NewReader failed`)
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return nil, err
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}
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if _, err = io.Copy(&buf, reader); err != nil {
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err = gerror.Wrap(err, `io.Copy failed`)
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return nil, err
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}
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if err = reader.Close(); err != nil {
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err = gerror.Wrap(err, `reader.Close failed`)
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return buf.Bytes(), err
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}
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return buf.Bytes(), nil
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}
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// UnGzipFile decompresses srcFilePath `src` to `dst` using gzip algorithm.
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func UnGzipFile(srcFilePath, dstFilePath string) error {
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srcFile, err := gfile.Open(srcFilePath)
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if err != nil {
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return err
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}
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defer srcFile.Close()
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dstFile, err := gfile.Create(dstFilePath)
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if err != nil {
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return err
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}
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defer dstFile.Close()
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reader, err := gzip.NewReader(srcFile)
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if err != nil {
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err = gerror.Wrap(err, `gzip.NewReader failed`)
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return err
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}
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defer reader.Close()
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if _, err = io.Copy(dstFile, reader); err != nil {
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err = gerror.Wrap(err, `io.Copy failed`)
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return err
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}
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return nil
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}
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