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|
package util
import (
"compress/gzip"
"fmt"
"io"
"sync"
)
var (
gzipReaderPool = sync.Pool{
New: func() interface{} {
return new(gzip.Reader)
//return gzip.NewReader()
},
}
gzipWriterPool = sync.Pool{
New: func() interface{} {
w, _ := gzip.NewWriterLevel(nil, gzip.BestSpeed)
return w
},
}
)
func GzipStream(w io.Writer, r io.Reader) (int64, error) {
gw, ok := gzipWriterPool.Get().(*gzip.Writer)
if !ok {
return 0, fmt.Errorf("gzip: new writer error")
}
gw.Reset(w)
defer func() {
gw.Close()
gzipWriterPool.Put(gw)
}()
return io.Copy(gw, r)
}
func GunzipStream(w io.Writer, r io.Reader) (int64, error) {
gr, ok := gzipReaderPool.Get().(*gzip.Reader)
if !ok {
return 0, fmt.Errorf("gzip: new reader error")
}
if err := gr.Reset(r); err != nil {
return 0, err
}
defer func() {
gr.Close()
gzipReaderPool.Put(gr)
}()
return io.Copy(w, gr)
}
|
