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package storage
import (
"bytes"
"github.com/aszxqw/weed-fs/go/glog"
"compress/flate"
"compress/gzip"
"io/ioutil"
"strings"
)
/*
* Default more not to gzip since gzip can be done on client side.
*/
func IsGzippable(ext, mtype string) bool {
if strings.HasPrefix(mtype, "text/") {
return true
}
switch ext {
case ".zip", ".rar", ".gz", ".bz2", ".xz":
return false
case ".pdf", ".txt", ".html", ".htm", ".css", ".js", ".json":
return true
}
if strings.HasPrefix(mtype, "application/") {
if strings.HasSuffix(mtype, "xml") {
return true
}
if strings.HasSuffix(mtype, "script") {
return true
}
}
return false
}
func GzipData(input []byte) ([]byte, error) {
buf := new(bytes.Buffer)
w, _ := gzip.NewWriterLevel(buf, flate.BestCompression)
if _, err := w.Write(input); err != nil {
glog.V(2).Infoln("error compressing data:", err)
return nil, err
}
if err := w.Close(); err != nil {
glog.V(2).Infoln("error closing compressed data:", err)
return nil, err
}
return buf.Bytes(), nil
}
func UnGzipData(input []byte) ([]byte, error) {
buf := bytes.NewBuffer(input)
r, _ := gzip.NewReader(buf)
defer r.Close()
output, err := ioutil.ReadAll(r)
if err != nil {
glog.V(2).Infoln("error uncompressing data:", err)
}
return output, err
}
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