diff --git a/weed/pb/filer_pb/filer_client.pb.go b/weed/pb/filer_pb/filer_client.go
similarity index 72%
rename from weed/pb/filer_pb/filer_client.pb.go
rename to weed/pb/filer_pb/filer_client.go
index b2be614af..100e997b2 100644
--- a/weed/pb/filer_pb/filer_client.pb.go
+++ b/weed/pb/filer_pb/filer_client.go
@@ -92,3 +92,31 @@ func ReadDirAllEntries(filerClient FilerClient, fullDirPath util.FullPath, prefi
 
 	return
 }
+
+func Exists(filerClient FilerClient, parentDirectoryPath string, entryName string, isDirectory bool) (exists bool, err error) {
+
+	err = filerClient.WithFilerClient(func(client SeaweedFilerClient) error {
+
+		request := &LookupDirectoryEntryRequest{
+			Directory: parentDirectoryPath,
+			Name:      entryName,
+		}
+
+		glog.V(4).Infof("exists entry %v/%v: %v", parentDirectoryPath, entryName, request)
+		resp, err := LookupEntry(client, request)
+		if err != nil {
+			if err == ErrNotFound {
+				exists = false
+				return nil
+			}
+			glog.V(0).Infof("exists entry %v: %v", request, err)
+			return fmt.Errorf("exists entry %s/%s: %v", parentDirectoryPath, entryName, err)
+		}
+
+		exists = resp.Entry.IsDirectory == isDirectory
+
+		return nil
+	})
+
+	return
+}
diff --git a/weed/s3api/filer_util.go b/weed/s3api/filer_util.go
index be985c893..2e738af50 100644
--- a/weed/s3api/filer_util.go
+++ b/weed/s3api/filer_util.go
@@ -153,30 +153,8 @@ 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 {
+	return filer_pb.Exists(s3a, parentDirectoryPath, entryName, isDirectory)
 
-		request := &filer_pb.LookupDirectoryEntryRequest{
-			Directory: parentDirectoryPath,
-			Name:      entryName,
-		}
-
-		glog.V(4).Infof("exists entry %v/%v: %v", parentDirectoryPath, entryName, request)
-		resp, err := filer_pb.LookupEntry(client, request)
-		if err != nil {
-			if err == filer_pb.ErrNotFound {
-				exists = false
-				return nil
-			}
-			glog.V(0).Infof("exists entry %v: %v", request, err)
-			return fmt.Errorf("exists entry %s/%s: %v", parentDirectoryPath, entryName, err)
-		}
-
-		exists = resp.Entry.IsDirectory == isDirectory
-
-		return nil
-	})
-
-	return
 }
 
 func objectKey(key *string) *string {
diff --git a/weed/s3api/s3api_handlers.go b/weed/s3api/s3api_handlers.go
index d850cb088..05dd4b823 100644
--- a/weed/s3api/s3api_handlers.go
+++ b/weed/s3api/s3api_handlers.go
@@ -46,6 +46,10 @@ func (s3a *S3ApiServer) WithFilerClient(fn func(filer_pb.SeaweedFilerClient) err
 	}, s3a.option.FilerGrpcAddress, s3a.option.GrpcDialOption)
 
 }
+func (s3a *S3ApiServer) AdjustedUrl(hostAndPort string) string {
+	return hostAndPort
+}
+
 
 // If none of the http routes match respond with MethodNotAllowed
 func notFoundHandler(w http.ResponseWriter, r *http.Request) {