diff --git a/weed/s3api/filer_util.go b/weed/s3api/filer_util.go
index 2793ee71d..be985c893 100644
--- a/weed/s3api/filer_util.go
+++ b/weed/s3api/filer_util.go
@@ -13,7 +13,7 @@ import (
 )
 
 func (s3a *S3ApiServer) mkdir(parentDirectoryPath string, dirName string, fn func(entry *filer_pb.Entry)) error {
-	return s3a.withFilerClient(func(client filer_pb.SeaweedFilerClient) error {
+	return s3a.WithFilerClient(func(client filer_pb.SeaweedFilerClient) error {
 
 		entry := &filer_pb.Entry{
 			Name:        dirName,
@@ -47,7 +47,7 @@ func (s3a *S3ApiServer) mkdir(parentDirectoryPath string, dirName string, fn fun
 }
 
 func (s3a *S3ApiServer) mkFile(parentDirectoryPath string, fileName string, chunks []*filer_pb.FileChunk) error {
-	return s3a.withFilerClient(func(client filer_pb.SeaweedFilerClient) error {
+	return s3a.WithFilerClient(func(client filer_pb.SeaweedFilerClient) error {
 
 		entry := &filer_pb.Entry{
 			Name:        fileName,
@@ -79,7 +79,7 @@ func (s3a *S3ApiServer) mkFile(parentDirectoryPath string, fileName string, chun
 
 func (s3a *S3ApiServer) list(parentDirectoryPath, prefix, startFrom string, inclusive bool, limit int) (entries []*filer_pb.Entry, err error) {
 
-	err = s3a.withFilerClient(func(client filer_pb.SeaweedFilerClient) error {
+	err = s3a.WithFilerClient(func(client filer_pb.SeaweedFilerClient) error {
 
 		request := &filer_pb.ListEntriesRequest{
 			Directory:          parentDirectoryPath,
@@ -119,7 +119,7 @@ func (s3a *S3ApiServer) list(parentDirectoryPath, prefix, startFrom string, incl
 
 func (s3a *S3ApiServer) rm(parentDirectoryPath, entryName string, isDeleteData, isRecursive bool) error {
 
-	return s3a.withFilerClient(func(client filer_pb.SeaweedFilerClient) error {
+	return s3a.WithFilerClient(func(client filer_pb.SeaweedFilerClient) error {
 
 		err := doDeleteEntry(client, parentDirectoryPath, entryName, isDeleteData, isRecursive)
 		if err != nil {
@@ -153,7 +153,7 @@ func doDeleteEntry(client filer_pb.SeaweedFilerClient, parentDirectoryPath strin
 
 func (s3a *S3ApiServer) exists(parentDirectoryPath string, entryName string, isDirectory bool) (exists bool, err error) {
 
-	err = s3a.withFilerClient(func(client filer_pb.SeaweedFilerClient) error {
+	err = s3a.WithFilerClient(func(client filer_pb.SeaweedFilerClient) error {
 
 		request := &filer_pb.LookupDirectoryEntryRequest{
 			Directory: parentDirectoryPath,
diff --git a/weed/s3api/s3api_bucket_handlers.go b/weed/s3api/s3api_bucket_handlers.go
index 8efb46014..02a01e74f 100644
--- a/weed/s3api/s3api_bucket_handlers.go
+++ b/weed/s3api/s3api_bucket_handlers.go
@@ -79,7 +79,7 @@ func (s3a *S3ApiServer) DeleteBucketHandler(w http.ResponseWriter, r *http.Reque
 	vars := mux.Vars(r)
 	bucket := vars["bucket"]
 
-	err := s3a.withFilerClient(func(client filer_pb.SeaweedFilerClient) error {
+	err := s3a.WithFilerClient(func(client filer_pb.SeaweedFilerClient) error {
 
 		// delete collection
 		deleteCollectionRequest := &filer_pb.DeleteCollectionRequest{
@@ -109,7 +109,7 @@ func (s3a *S3ApiServer) HeadBucketHandler(w http.ResponseWriter, r *http.Request
 	vars := mux.Vars(r)
 	bucket := vars["bucket"]
 
-	err := s3a.withFilerClient(func(client filer_pb.SeaweedFilerClient) error {
+	err := s3a.WithFilerClient(func(client filer_pb.SeaweedFilerClient) error {
 
 		request := &filer_pb.LookupDirectoryEntryRequest{
 			Directory: s3a.option.BucketsPath,
diff --git a/weed/s3api/s3api_handlers.go b/weed/s3api/s3api_handlers.go
index d7212d5e3..d850cb088 100644
--- a/weed/s3api/s3api_handlers.go
+++ b/weed/s3api/s3api_handlers.go
@@ -38,7 +38,7 @@ func encodeResponse(response interface{}) []byte {
 	return bytesBuffer.Bytes()
 }
 
-func (s3a *S3ApiServer) withFilerClient(fn func(filer_pb.SeaweedFilerClient) error) error {
+func (s3a *S3ApiServer) WithFilerClient(fn func(filer_pb.SeaweedFilerClient) error) error {
 
 	return pb.WithCachedGrpcClient(func(grpcConnection *grpc.ClientConn) error {
 		client := filer_pb.NewSeaweedFilerClient(grpcConnection)
diff --git a/weed/s3api/s3api_object_handlers.go b/weed/s3api/s3api_object_handlers.go
index bb3ead6f2..6a1b67d27 100644
--- a/weed/s3api/s3api_object_handlers.go
+++ b/weed/s3api/s3api_object_handlers.go
@@ -169,7 +169,7 @@ func (s3a *S3ApiServer) DeleteMultipleObjectsHandler(w http.ResponseWriter, r *h
 	var deletedObjects []ObjectIdentifier
 	var deleteErrors []DeleteError
 
-	s3a.withFilerClient(func(client filer_pb.SeaweedFilerClient) error {
+	s3a.WithFilerClient(func(client filer_pb.SeaweedFilerClient) error {
 
 		for _, object := range deleteObjects.Objects {
 			lastSeparator := strings.LastIndex(object.ObjectName, "/")
diff --git a/weed/s3api/s3api_objects_list_handlers.go b/weed/s3api/s3api_objects_list_handlers.go
index 5006df6a0..4469c03a6 100644
--- a/weed/s3api/s3api_objects_list_handlers.go
+++ b/weed/s3api/s3api_objects_list_handlers.go
@@ -91,7 +91,7 @@ func (s3a *S3ApiServer) listFilerEntries(bucket, originalPrefix string, maxKeys
 	}
 
 	// check filer
-	err = s3a.withFilerClient(func(client filer_pb.SeaweedFilerClient) error {
+	err = s3a.WithFilerClient(func(client filer_pb.SeaweedFilerClient) error {
 
 		request := &filer_pb.ListEntriesRequest{
 			Directory:          fmt.Sprintf("%s/%s/%s", s3a.option.BucketsPath, bucket, dir),