2012-07-30 16:36:25 +08:00
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package storage
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import (
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2012-12-23 05:15:09 +08:00
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"bytes"
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2014-09-25 00:47:09 +08:00
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"github.com/aszxqw/weed-fs/go/glog"
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2012-12-23 05:15:09 +08:00
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"compress/flate"
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"compress/gzip"
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"io/ioutil"
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"strings"
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2012-07-30 16:36:25 +08:00
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)
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2012-12-23 05:15:09 +08:00
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/*
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* Default more not to gzip since gzip can be done on client side.
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2013-02-27 14:54:22 +08:00
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*/
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2012-10-24 01:59:40 +08:00
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func IsGzippable(ext, mtype string) bool {
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2013-01-17 16:56:56 +08:00
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if strings.HasPrefix(mtype, "text/") {
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2013-01-17 16:15:09 +08:00
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return true
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}
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2013-01-17 16:56:56 +08:00
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switch ext {
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case ".zip", ".rar", ".gz", ".bz2", ".xz":
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return false
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2014-07-09 00:32:55 +08:00
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case ".pdf", ".txt", ".html", ".htm", ".css", ".js", ".json":
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2012-12-23 05:15:09 +08:00
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return true
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}
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if strings.HasPrefix(mtype, "application/") {
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2013-01-17 16:15:09 +08:00
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if strings.HasSuffix(mtype, "xml") {
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return true
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}
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if strings.HasSuffix(mtype, "script") {
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2012-12-23 05:15:09 +08:00
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return true
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}
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}
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return false
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2012-07-30 16:36:25 +08:00
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}
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2013-01-17 16:56:56 +08:00
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func GzipData(input []byte) ([]byte, error) {
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2012-12-23 05:15:09 +08:00
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buf := new(bytes.Buffer)
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w, _ := gzip.NewWriterLevel(buf, flate.BestCompression)
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if _, err := w.Write(input); err != nil {
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2013-08-12 02:38:55 +08:00
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glog.V(2).Infoln("error compressing data:", err)
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2013-01-17 16:56:56 +08:00
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return nil, err
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2012-12-23 05:15:09 +08:00
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}
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if err := w.Close(); err != nil {
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2013-08-12 02:38:55 +08:00
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glog.V(2).Infoln("error closing compressed data:", err)
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2013-01-17 16:56:56 +08:00
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return nil, err
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2012-12-23 05:15:09 +08:00
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}
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2013-01-17 16:56:56 +08:00
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return buf.Bytes(), nil
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2012-07-30 16:36:25 +08:00
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}
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2013-01-17 16:56:56 +08:00
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func UnGzipData(input []byte) ([]byte, error) {
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2012-12-23 05:15:09 +08:00
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buf := bytes.NewBuffer(input)
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r, _ := gzip.NewReader(buf)
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defer r.Close()
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output, err := ioutil.ReadAll(r)
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if err != nil {
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2013-08-12 02:38:55 +08:00
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glog.V(2).Infoln("error uncompressing data:", err)
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2012-12-23 05:15:09 +08:00
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}
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2013-01-17 16:56:56 +08:00
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return output, err
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2012-07-30 16:52:11 +08:00
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}
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