diff --git a/weed/command/filer_copy.go b/weed/command/filer_copy.go
index b519afe86b4..0f4f96f1b14 100644
--- a/weed/command/filer_copy.go
+++ b/weed/command/filer_copy.go
@@ -15,7 +15,6 @@ import (
 	"github.com/chrislusf/seaweedfs/weed/util"
 	"io"
 	"net/http"
-	"path"
 	"strconv"
 	"time"
 )
@@ -165,7 +164,6 @@ func uploadFileAsOne(filerAddress, filerGrpcAddress string, urlFolder string, f
 	// upload the file content
 	fileName := filepath.Base(f.Name())
 	mimeType := detectMimeType(f)
-	isGzipped := isGzipped(fileName)
 
 	var chunks []*filer_pb.FileChunk
 
@@ -184,7 +182,7 @@ func uploadFileAsOne(filerAddress, filerGrpcAddress string, urlFolder string, f
 
 		targetUrl := "http://" + assignResult.Url + "/" + assignResult.Fid
 
-		uploadResult, err := operation.Upload(targetUrl, fileName, f, isGzipped, mimeType, nil, "")
+		uploadResult, err := operation.Upload(targetUrl, fileName, f, false, mimeType, nil, "")
 		if err != nil {
 			fmt.Printf("upload data %v to %s: %v\n", fileName, targetUrl, err)
 			return false
@@ -318,10 +316,6 @@ func uploadFileInChunks(filerAddress, filerGrpcAddress string, urlFolder string,
 	return true
 }
 
-func isGzipped(filename string) bool {
-	return strings.ToLower(path.Ext(filename)) == ".gz"
-}
-
 func detectMimeType(f *os.File) string {
 	head := make([]byte, 512)
 	f.Seek(0, 0)
diff --git a/weed/operation/submit.go b/weed/operation/submit.go
index b81f645936a..63ab694a775 100644
--- a/weed/operation/submit.go
+++ b/weed/operation/submit.go
@@ -18,7 +18,6 @@ type FilePart struct {
 	Reader      io.Reader
 	FileName    string
 	FileSize    int64
-	IsGzipped   bool
 	MimeType    string
 	ModTime     int64 //in seconds
 	Replication string
@@ -103,7 +102,6 @@ func newFilePart(fullPathFilename string) (ret FilePart, err error) {
 	ret.ModTime = fi.ModTime().UTC().Unix()
 	ret.FileSize = fi.Size()
 	ext := strings.ToLower(path.Ext(fullPathFilename))
-	ret.IsGzipped = ext == ".gz"
 	ret.FileName = fi.Name()
 	if ext != "" {
 		ret.MimeType = mime.TypeByExtension(ext)
@@ -193,7 +191,7 @@ func (fi FilePart) Upload(maxMB int, master string, secret security.Secret) (ret
 			cm.DeleteChunks(master)
 		}
 	} else {
-		ret, e := Upload(fileUrl, baseName, fi.Reader, fi.IsGzipped, fi.MimeType, nil, jwt)
+		ret, e := Upload(fileUrl, baseName, fi.Reader, false, fi.MimeType, nil, jwt)
 		if e != nil {
 			return 0, e
 		}
@@ -203,7 +201,7 @@ func (fi FilePart) Upload(maxMB int, master string, secret security.Secret) (ret
 }
 
 func upload_one_chunk(filename string, reader io.Reader, master,
-	fileUrl string, jwt security.EncodedJwt,
+fileUrl string, jwt security.EncodedJwt,
 ) (size uint32, e error) {
 	glog.V(4).Info("Uploading part ", filename, " to ", fileUrl, "...")
 	uploadResult, uploadError := Upload(fileUrl, filename, reader, false,
diff --git a/weed/storage/needle_parse_multipart.go b/weed/storage/needle_parse_multipart.go
index 8d5b96a2790..2ebf86d96cc 100644
--- a/weed/storage/needle_parse_multipart.go
+++ b/weed/storage/needle_parse_multipart.go
@@ -83,6 +83,9 @@ func parseMultipart(r *http.Request) (
 		}
 
 		if part.Header.Get("Content-Encoding") == "gzip" {
+			if unzipped, e := operation.UnGzipData(data); e == nil {
+				originalDataSize = len(unzipped)
+			}
 			isGzipped = true
 		} else if operation.IsGzippable(ext, mtype) {
 			if data, e = operation.GzipData(data); e != nil {
@@ -90,15 +93,6 @@ func parseMultipart(r *http.Request) (
 			}
 			isGzipped = true
 		}
-		if ext == ".gz" {
-			if strings.HasSuffix(fileName, ".css.gz") ||
-				strings.HasSuffix(fileName, ".html.gz") ||
-				strings.HasSuffix(fileName, ".txt.gz") ||
-				strings.HasSuffix(fileName, ".js.gz") {
-				fileName = fileName[:len(fileName)-3]
-				isGzipped = true
-			}
-		}
 	}
 
 	return