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gzip.go
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gzip.go
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package utils
import (
"bytes"
"compress/gzip"
"compress/zlib"
"io"
)
func GzipCompress(i interface{}) ([]byte, error) {
var buf bytes.Buffer
var w = gzip.NewWriter(&buf)
switch ret := i.(type) {
case io.Reader:
_, err := io.Copy(w, ret)
w.Close()
if err != nil && err != io.EOF {
return buf.Bytes(), err
}
return buf.Bytes(), nil
default:
_, err := w.Write(InterfaceToBytes(ret))
if err != nil {
return nil, err
}
w.Flush()
w.Close()
return buf.Bytes(), nil
}
}
func ZlibCompress(i interface{}) ([]byte, error) {
var buf bytes.Buffer
var w = zlib.NewWriter(&buf)
switch ret := i.(type) {
case io.Reader:
_, err := io.Copy(w, ret)
w.Close()
if err != nil && err != io.EOF {
return buf.Bytes(), err
}
return buf.Bytes(), nil
default:
_, err := w.Write(InterfaceToBytes(ret))
if err != nil {
return nil, err
}
w.Flush()
w.Close()
return buf.Bytes(), nil
}
}
func GzipDeCompress(ret []byte) ([]byte, error) {
var reader *gzip.Reader
var err error
reader, err = gzip.NewReader(bytes.NewBuffer(ret))
if err != nil {
return nil, Errorf("create gzip reader failed: %s", err)
}
var bufBytes bytes.Buffer
_, err = io.Copy(&bufBytes, reader)
reader.Close()
if err != nil {
return bufBytes.Bytes(), Errorf("ungzip failed: %s", err)
}
return bufBytes.Bytes(), nil
}
func ZlibDeCompress(ret []byte) ([]byte, error) {
reader, err := zlib.NewReader(bytes.NewBuffer(ret))
if err != nil {
return nil, Errorf("create gzip reader failed: %s", err)
}
var bufBytes bytes.Buffer
_, err = io.Copy(&bufBytes, reader)
reader.Close()
if err != nil {
return bufBytes.Bytes(), Errorf("ungzip failed: %s", err)
}
return bufBytes.Bytes(), nil
}
func IsGzipBytes(i interface{}) bool {
switch ret := i.(type) {
case io.Reader:
_, err := gzip.NewReader(ret)
if err != nil {
return false
}
return true
default:
var buf = bytes.NewBuffer(InterfaceToBytes(i))
return IsGzipBytes(buf)
}
}