From c62794269165275361c1475ff803fc24784836a4 Mon Sep 17 00:00:00 2001
From: "chris.lu@gmail.com"
 <chris.lu@gmail.com@282b0af5-e82d-9cf1-ede4-77906d7719d0>
Date: Mon, 30 Jul 2012 08:52:11 +0000
Subject: [PATCH] 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 |  6 +++++-
 weed-fs/src/pkg/storage/compress.go      | 11 +++++++++++
 2 files changed, 16 insertions(+), 1 deletion(-)

diff --git a/weed-fs/src/cmd/weedvolume/weedvolume.go b/weed-fs/src/cmd/weedvolume/weedvolume.go
index 1bd790946..e2ebfc53f 100644
--- a/weed-fs/src/cmd/weedvolume/weedvolume.go
+++ b/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)
diff --git a/weed-fs/src/pkg/storage/compress.go b/weed-fs/src/pkg/storage/compress.go
index 9e63a9fe8..74088a3c4 100644
--- a/weed-fs/src/pkg/storage/compress.go
+++ b/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
+}