diff --git a/weed/s3api/s3api_bucket_handlers.go b/weed/s3api/s3api_bucket_handlers.go
index 7de1d5ebb..6f72e045f 100644
--- a/weed/s3api/s3api_bucket_handlers.go
+++ b/weed/s3api/s3api_bucket_handlers.go
@@ -135,7 +135,7 @@ func (s3a *S3ApiServer) PutBucketHandler(w http.ResponseWriter, r *http.Request)
 		s3err.WriteErrorResponse(w, r, s3err.ErrInternalError)
 		return
 	}
-	w.Header().Set("Location", "/" + bucket)
+	w.Header().Set("Location", "/"+bucket)
 	writeSuccessResponseEmpty(w, r)
 }
 
diff --git a/weed/s3api/s3api_object_multipart_handlers.go b/weed/s3api/s3api_object_multipart_handlers.go
index d2fa21c2e..d74867778 100644
--- a/weed/s3api/s3api_object_multipart_handlers.go
+++ b/weed/s3api/s3api_object_multipart_handlers.go
@@ -1,8 +1,8 @@
 package s3api
 
 import (
-	"encoding/xml"
 	"crypto/sha1"
+	"encoding/xml"
 	"fmt"
 	"github.com/chrislusf/seaweedfs/weed/glog"
 	xhttp "github.com/chrislusf/seaweedfs/weed/s3api/http"
diff --git a/weed/topology/topology.go b/weed/topology/topology.go
index aacdfa7d2..6d5b373e9 100644
--- a/weed/topology/topology.go
+++ b/weed/topology/topology.go
@@ -303,8 +303,8 @@ func (t *Topology) IncrementalSyncDataNodeRegistration(newVolumes, deletedVolume
 	return
 }
 
-func (t *Topology) DataNodeRegistration(dcName, rackName string ,dn *DataNode){
-	if dn.Parent() != nil{
+func (t *Topology) DataNodeRegistration(dcName, rackName string, dn *DataNode) {
+	if dn.Parent() != nil {
 		return
 	}
 	// registration to topo
@@ -312,4 +312,4 @@ func (t *Topology) DataNodeRegistration(dcName, rackName string ,dn *DataNode){
 	rack := dc.GetOrCreateRack(rackName)
 	rack.LinkChildNode(dn)
 	glog.Infof("[%s] reLink To topo  ", dn.Id())
-}
\ No newline at end of file
+}