diff --git a/libs/meta/store.go b/libs/meta/store.go
index e32158c..f4d4887 100644
--- a/libs/meta/store.go
+++ b/libs/meta/store.go
@@ -7,6 +7,7 @@ import (
 	log "github.com/golang/glog"
 	"io/ioutil"
 	"net/http"
+	"time"
 )
 
 const (
@@ -27,6 +28,15 @@ const (
 	probeAPI = "http://%s/probe?vid=%d"
 )
 
+var (
+	_client = &http.Client{
+		Transport: &http.Transport{
+			DisableCompression: true,
+		},
+		Timeout: 2 * time.Second,
+	}
+)
+
 type StoreList []*Store
 
 func (sl StoreList) Len() int {
@@ -83,12 +93,17 @@ func (s *Store) probeAPI(vid int32) string {
 func (s *Store) Info() (vs []*Volume, err error) {
 	var (
 		body []byte
+		req  *http.Request
 		resp *http.Response
 		data = new(Volumes)
 		url  = s.statAPI()
 	)
-	if resp, err = http.Get(url); err != nil {
-		log.Warningf("http.Get(\"%s\") error(%v)", url, err)
+	if req, err = http.NewRequest("GET", url, nil); err != nil {
+		log.Info("http.NewRequest(GET,%s) error(%v)", url, err)
+		return
+	}
+	if resp, err = _client.Do(req); err != nil {
+		log.Errorf("_client.do(%s) error(%v)", url, err)
 		return
 	}
 	defer resp.Body.Close()
@@ -111,13 +126,20 @@ func (s *Store) Info() (vs []*Volume, err error) {
 // Head send a head request to store.
 func (s *Store) Head(vid int32) (err error) {
 	var (
+		req  *http.Request
 		resp *http.Response
 		url  string
 	)
 	url = s.probeAPI(vid)
-	if resp, err = http.Head(url); err != nil {
+	if req, err = http.NewRequest("HEAD", url, nil); err != nil {
+		log.Info("http.NewRequest(GET,%s) error(%v)", url, err)
+		return
+	}
+	if resp, err = _client.Do(req); err != nil {
+		log.Errorf("_client.do(%s) error(%v)", url, err)
 		return
 	}
+	defer resp.Body.Close()
 	if resp.StatusCode == http.StatusInternalServerError {
 		err = errors.ErrInternal
 	}
diff --git a/proxy/bfs/bfs.go b/proxy/bfs/bfs.go
index d5bb22b..4fa2b9f 100644
--- a/proxy/bfs/bfs.go
+++ b/proxy/bfs/bfs.go
@@ -116,8 +116,12 @@ func (b *Bfs) Get(bucket, filename string) (src io.ReadCloser, ctlen int, mtime
 		ctlen = int(resp.ContentLength)
 		break
 	}
-	if err == nil && resp.StatusCode == http.StatusServiceUnavailable {
-		err = errors.ErrStoreNotAvailable
+	if err == nil {
+		if resp.StatusCode == http.StatusServiceUnavailable {
+			err = errors.ErrStoreNotAvailable
+		} else if resp.StatusCode == http.StatusNotFound {
+			err = errors.ErrNeedleNotExist
+		}
 	}
 	return
 }
diff --git a/proxy/http_api.go b/proxy/http_api.go
index a995426..d2c67cf 100644
--- a/proxy/http_api.go
+++ b/proxy/http_api.go
@@ -157,8 +157,18 @@ func (s *server) parseURI(r *http.Request, upload bool) (bucket, file string, st
 
 // gentRI get uri by bucket and file.
 func (s *server) getURI(bucket, file string) (uri string) {
+	var (
+		item   *ibucket.Item
+		domain string
+	)
 	// http://domain/prefix/bucket/file
-	uri = s.c.Domain + path.Join(s.c.Prefix, bucket, file)
+	item, _ = s.bucket.Get(bucket)
+	if item.Domain != "" {
+		domain = item.Domain
+	} else {
+		domain = s.c.Domain
+	}
+	uri = domain + path.Join(s.c.Prefix, bucket, file)
 	return
 }
 
@@ -235,10 +245,16 @@ func (s *server) upload(item *ibucket.Item, bucket, file string, wr http.Respons
 		return
 	}
 	r.Body.Close()
-	if len(body) > s.c.MaxFileSize {
+	length := len(body)
+	if length > s.c.MaxFileSize {
 		status = http.StatusRequestEntityTooLarge
 		return
 	}
+	if length == 0 {
+		status = http.StatusBadRequest
+		log.Errorf("file size equals 0")
+		return
+	}
 	sha = sha1.Sum(body)
 	sha1sum = hex.EncodeToString(sha[:])
 	// if empty filename or endwith "/": dir