mirror of
https://gitee.com/johng/gf.git
synced 2024-11-30 19:27:46 +08:00
51 lines
1.1 KiB
Go
51 lines
1.1 KiB
Go
// Copyright 2017 gf Author(https://github.com/gogf/gf). All Rights Reserved.
|
|
//
|
|
// This Source Code Form is subject to the terms of the MIT License.
|
|
// If a copy of the MIT was not distributed with this file,
|
|
// You can obtain one at https://github.com/gogf/gf.
|
|
|
|
// Package gcompress provides kinds of compression algorithms for binary/bytes data.
|
|
package gcompress
|
|
|
|
import (
|
|
"bytes"
|
|
"compress/zlib"
|
|
"io"
|
|
)
|
|
|
|
// Zlib compresses <data> with zlib algorithm.
|
|
func Zlib(data []byte) ([]byte, error) {
|
|
if data == nil || len(data) < 13 {
|
|
return data, nil
|
|
}
|
|
var in bytes.Buffer
|
|
var err error
|
|
w := zlib.NewWriter(&in)
|
|
if _, err = w.Write(data); err != nil {
|
|
return nil, err
|
|
}
|
|
if err = w.Close(); err != nil {
|
|
return in.Bytes(), err
|
|
}
|
|
return in.Bytes(), nil
|
|
}
|
|
|
|
// UnZlib decompresses <data> with zlib algorithm.
|
|
func UnZlib(data []byte) ([]byte, error) {
|
|
if data == nil || len(data) < 13 {
|
|
return data, nil
|
|
}
|
|
|
|
b := bytes.NewReader(data)
|
|
var out bytes.Buffer
|
|
var err error
|
|
r, err := zlib.NewReader(b)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
if _, err = io.Copy(&out, r); err != nil {
|
|
return nil, err
|
|
}
|
|
return out.Bytes(), nil
|
|
}
|