adding uncompressing support!

git-svn-id: https://weed-fs.googlecode.com/svn/trunk@61 282b0af5-e82d-9cf1-ede4-77906d7719d0

weed-fs/src/cmd/weedvolume/weedvolume.go

@@ -65,7 +65,11 @@ func GetHandler(w http.ResponseWriter, r *http.Request) {
     mtype := mime.TypeByExtension(ext)
 		w.Header().Set("Content-Type", mtype)
     if storage.IsCompressable(ext, mtype){
-      w.Header().Set("Content-Encoding", "gzip")
+      if strings.Contains(r.Header.Get("Accept-Encoding"), "gzip"){
+        w.Header().Set("Content-Encoding", "gzip")
+      }else{
+        n.Data = storage.UnGzipData(n.Data)
+      }
     }
 	}
 	w.Write(n.Data)

weed-fs/src/pkg/storage/compress.go

@@ -4,6 +4,7 @@ import (
   "bytes"
   "compress/flate"
   "compress/gzip"
+  "io/ioutil"
   "log"
   "strings"
 )
@@ -34,3 +35,13 @@ func GzipData(input []byte) []byte {
   }
   return buf.Bytes()
 }
+func UnGzipData(input []byte) []byte {
+  buf := bytes.NewBuffer(input)
+  r, _ := gzip.NewReader(buf)
+  defer r.Close()
+  output, err := ioutil.ReadAll(r)
+  if err!=nil {
+    log.Printf("error uncompressing data:%s\n", err)
+  }
+  return output
+}