diff --git a/weed/filer2/filechunks.go b/weed/filer2/filechunks.go
index e47cb762f..b248a8c59 100644
--- a/weed/filer2/filechunks.go
+++ b/weed/filer2/filechunks.go
@@ -1,10 +1,10 @@
 package filer2
 
 import (
+	"fmt"
+	"hash/fnv"
 	"math"
 	"sort"
-	"hash/fnv"
-	"fmt"
 
 	"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
 )
diff --git a/weed/filesys/dirty_page.go b/weed/filesys/dirty_page.go
index dd080f721..3b55d5c0b 100644
--- a/weed/filesys/dirty_page.go
+++ b/weed/filesys/dirty_page.go
@@ -130,7 +130,6 @@ func (pages *ContinuousDirtyPages) saveExistingPagesToStorage(ctx context.Contex
 
 func (pages *ContinuousDirtyPages) saveToStorage(ctx context.Context, buf []byte, offset int64) (*filer_pb.FileChunk, error) {
 
-
 	var fileId, host string
 
 	if err := pages.f.wfs.withFilerClient(func(client filer_pb.SeaweedFilerClient) error {
diff --git a/weed/s3api/filer_multipart.go b/weed/s3api/filer_multipart.go
index d9cafae26..cfd46c9f8 100644
--- a/weed/s3api/filer_multipart.go
+++ b/weed/s3api/filer_multipart.go
@@ -2,17 +2,17 @@ package s3api
 
 import (
 	"fmt"
-	"time"
-	"strings"
-	"strconv"
 	"path/filepath"
+	"strconv"
+	"strings"
+	"time"
 
-	"github.com/aws/aws-sdk-go/service/s3"
 	"github.com/aws/aws-sdk-go/aws"
-	"github.com/satori/go.uuid"
+	"github.com/aws/aws-sdk-go/service/s3"
+	"github.com/chrislusf/seaweedfs/weed/filer2"
 	"github.com/chrislusf/seaweedfs/weed/glog"
 	"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
-	"github.com/chrislusf/seaweedfs/weed/filer2"
+	"github.com/satori/go.uuid"
 )
 
 func (s3a *S3ApiServer) createMultipartUpload(input *s3.CreateMultipartUploadInput) (output *s3.CreateMultipartUploadOutput, code ErrorCode) {
diff --git a/weed/s3api/s3api_object_multipart_handlers.go b/weed/s3api/s3api_object_multipart_handlers.go
index 042736856..d9baa9aae 100644
--- a/weed/s3api/s3api_object_multipart_handlers.go
+++ b/weed/s3api/s3api_object_multipart_handlers.go
@@ -1,16 +1,16 @@
 package s3api
 
 import (
-	"net/http"
-	"github.com/gorilla/mux"
-	"fmt"
-	"github.com/aws/aws-sdk-go/service/s3"
-	"github.com/aws/aws-sdk-go/aws"
-	"net/url"
-	"strconv"
-	"io/ioutil"
 	"encoding/xml"
+	"fmt"
+	"github.com/aws/aws-sdk-go/aws"
+	"github.com/aws/aws-sdk-go/service/s3"
+	"github.com/gorilla/mux"
+	"io/ioutil"
+	"net/http"
+	"net/url"
 	"sort"
+	"strconv"
 	"strings"
 )
 
diff --git a/weed/s3api/s3api_objects_list_handlers.go b/weed/s3api/s3api_objects_list_handlers.go
index e104b4c9e..d751a3b1d 100644
--- a/weed/s3api/s3api_objects_list_handlers.go
+++ b/weed/s3api/s3api_objects_list_handlers.go
@@ -11,10 +11,10 @@ import (
 
 	"github.com/aws/aws-sdk-go/aws"
 	"github.com/aws/aws-sdk-go/service/s3"
+	"github.com/chrislusf/seaweedfs/weed/filer2"
 	"github.com/chrislusf/seaweedfs/weed/glog"
 	"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
 	"github.com/gorilla/mux"
-	"github.com/chrislusf/seaweedfs/weed/filer2"
 )
 
 const (
diff --git a/weed/s3api/s3api_server.go b/weed/s3api/s3api_server.go
index efeeb34ce..a62b521de 100644
--- a/weed/s3api/s3api_server.go
+++ b/weed/s3api/s3api_server.go
@@ -37,7 +37,7 @@ func (s3a *S3ApiServer) registerRouter(router *mux.Router) {
 	apiRouter := router.PathPrefix("/").Subrouter()
 	var routers []*mux.Router
 	if s3a.option.DomainName != "" {
-		routers = append(routers, apiRouter.Host("{bucket:.+}."+ s3a.option.DomainName).Subrouter())
+		routers = append(routers, apiRouter.Host("{bucket:.+}."+s3a.option.DomainName).Subrouter())
 	}
 	routers = append(routers, apiRouter.PathPrefix("/{bucket}").Subrouter())