Golang gzip文件压缩解压实战教程

func compressFile(src, dst string) error {
    srcFile, err := os.Open(src)
    if err != nil {
        return err
    }
    defer srcFile.Close()

    dstFile, err := os.Create(dst)
    if err != nil {
        return err
    }
    defer dstFile.Close()

    gzWriter := gzip.NewWriter(dstFile)
    defer gzWriter.Close()

    _, err = io.Copy(gzWriter, srcFile)
    return err
}

func decompressFile(src, dst string) error {
    srcFile, err := os.Open(src)
    if err != nil {
        return err
    }
    defer srcFile.Close()

    gzReader, err := gzip.NewReader(srcFile)
    if err != nil {
        return err
    }
    defer gzReader.Close()

    dstFile, err := os.Create(dst)
    if err != nil {
        return err
    }
    defer dstFile.Close()

    _, err = io.Copy(dstFile, gzReader)
    return err
}

// 压缩字节流
func gzipData(data []byte) ([]byte, error) {
    var buf bytes.Buffer
    writer := gzip.NewWriter(&buf)
    _, err := writer.Write(data)
    if err != nil {
        return nil, err
    }
    writer.Close() // 必须调用
    return buf.Bytes(), nil
}

// 解压字节流
func gunzipData(data []byte) ([]byte, error) {
    reader, err := gzip.NewReader(bytes.NewReader(data))
    if err != nil {
        return nil, err
    }
    defer reader.Close()
    return io.ReadAll(reader)
}