diff --git a/go/operation/chunked_file.go b/go/operation/chunked_file.go
index 0492d39a7..0e455e93a 100644
--- a/go/operation/chunked_file.go
+++ b/go/operation/chunked_file.go
@@ -22,9 +22,9 @@ var (
 )
 
 type ChunkInfo struct {
-	Fid    string `json:"fid,omitempty"`
-	Offset int64  `json:"offset,omitempty"`
-	Size   int64  `json:"size,omitempty"`
+	Fid    string `json:"fid"`
+	Offset int64  `json:"offset"`
+	Size   int64  `json:"size"`
 }
 
 type ChunkList []*ChunkInfo
@@ -52,7 +52,7 @@ func (s ChunkList) Swap(i, j int)      { s[i], s[j] = s[j], s[i] }
 
 func LoadChunkedManifest(buffer []byte) (*ChunkManifest, error) {
 	cm := ChunkManifest{}
-	if e := json.Unmarshal(buffer, cm); e != nil {
+	if e := json.Unmarshal(buffer, &cm); e != nil {
 		return nil, e
 	}
 	sort.Sort(cm.Chunks)
diff --git a/go/operation/submit.go b/go/operation/submit.go
index 8af36c722..65f20cf55 100644
--- a/go/operation/submit.go
+++ b/go/operation/submit.go
@@ -116,11 +116,12 @@ func (fi FilePart) Upload(maxMB int, master string, secret security.Secret) (ret
 	if closer, ok := fi.Reader.(io.Closer); ok {
 		defer closer.Close()
 	}
+	baseName := path.Base(fi.FileName)
 	if maxMB > 0 && fi.FileSize > int64(maxMB*1024*1024) {
 		chunkSize := int64(maxMB * 1024 * 1024)
 		chunks := fi.FileSize/chunkSize + 1
 		cm := ChunkManifest{
-			Name:   fi.FileName,
+			Name:   baseName,
 			Size:   fi.FileSize,
 			Mime:   fi.MimeType,
 			Chunks: make([]*ChunkInfo, 0, chunks),
@@ -128,7 +129,7 @@ func (fi FilePart) Upload(maxMB int, master string, secret security.Secret) (ret
 
 		for i := int64(0); i < chunks; i++ {
 			id, count, e := upload_one_chunk(
-				fi.FileName+"-"+strconv.FormatInt(i+1, 10),
+				baseName+"-"+strconv.FormatInt(i+1, 10),
 				io.LimitReader(fi.Reader, chunkSize),
 				master, fi.Replication, fi.Collection, fi.Ttl,
 				jwt)
@@ -152,7 +153,7 @@ func (fi FilePart) Upload(maxMB int, master string, secret security.Secret) (ret
 			cm.DeleteChunks(master)
 		}
 	} else {
-		ret, e := Upload(fileUrl, fi.FileName, fi.Reader, fi.IsGzipped, fi.MimeType, jwt)
+		ret, e := Upload(fileUrl, baseName, fi.Reader, fi.IsGzipped, fi.MimeType, jwt)
 		if e != nil {
 			return 0, e
 		}
diff --git a/go/weed/weed_server/volume_server_handlers_read.go b/go/weed/weed_server/volume_server_handlers_read.go
index d2375099f..6a7944d25 100644
--- a/go/weed/weed_server/volume_server_handlers_read.go
+++ b/go/weed/weed_server/volume_server_handlers_read.go
@@ -225,18 +225,22 @@ func (vs *VolumeServer) tryHandleChunkedFile(n *storage.Needle, fileName string,
 	if !n.IsChunkedManifest() {
 		return false
 	}
-	processed = true
 	raw, _ := strconv.ParseBool(r.FormValue("raw"))
 	if raw {
-		w.Header().Set("Content-Type", "application/json")
-		w.Header().Set("Content-Length", strconv.Itoa(len(n.Data)))
-		if _, e := w.Write(n.Data); e != nil {
-			glog.V(0).Infoln("response write error:", e)
+		return false
+	}
+	processed = true
+	if n.IsGzipped(){
+		var err error
+		if n.Data, err = storage.UnGzipData(n.Data); err != nil {
+			glog.V(0).Infoln("ungzip data error:", err, r.URL.Path)
+			return false
 		}
-		return true
 	}
+
 	chunkManifest, e := operation.LoadChunkedManifest(n.Data)
 	if e != nil {
+		glog.V(0).Infoln("load chunked manifest error:", e)
 		return false
 	}
 	ext := ""