diff --git a/server/http/cmd_bit.go b/server/http/cmd_bit.go
index e5d9965..538b3a9 100644
--- a/server/http/cmd_bit.go
+++ b/server/http/cmd_bit.go
@@ -14,7 +14,7 @@ func bgetCommand(db *ledis.DB, args ...string) (interface{}, error) {
 	if v, err := db.BGet([]byte(args[0])); err != nil {
 		return nil, err
 	} else {
-		return v, nil
+		return ledis.String(v), nil
 	}
 }
 
diff --git a/server/http/cmd_bit_test.go b/server/http/cmd_bit_test.go
new file mode 100644
index 0000000..21844db
--- /dev/null
+++ b/server/http/cmd_bit_test.go
@@ -0,0 +1,93 @@
+package http
+
+import (
+	//	"github.com/siddontang/ledisdb/ledis"
+	"testing"
+)
+
+func TestBgetCommand(t *testing.T) {
+	db := getTestDB()
+	db.BSetBit([]byte("test_bget"), 0, 1)
+	db.BSetBit([]byte("test_bget"), 1, 1)
+	db.BSetBit([]byte("test_bget"), 2, 1)
+
+	_, err := bgetCommand(db, "test_bget", "a", "b", "c")
+	if err == nil || err.Error() != "ERR wrong number of arguments for 'bget' command" {
+		t.Fatal("invalid err %v", err)
+	}
+
+	r, err := bgetCommand(db, "test_bget")
+	if err != nil {
+		t.Fatal(err.Error())
+	}
+	str := r.(string)
+	if str != "\x07" {
+		t.Fatal("wrong result of 'bget': %v", []byte(str))
+	}
+}
+
+func TestBDeleteCommand(t *testing.T) {
+	db := getTestDB()
+
+	_, err := bdeleteCommand(db, "test_bdelete", "a", "b", "c")
+	if err == nil || err.Error() != "ERR wrong number of arguments for 'bdelete' command" {
+		t.Fatalf("invalid err %v", err)
+	}
+
+	db.BSetBit([]byte("test_bdelete"), 0, 1)
+	db.BSetBit([]byte("test_bdelete"), 1, 1)
+	db.BSetBit([]byte("test_bdelete"), 2, 1)
+	n, err := bdeleteCommand(db, "test_bdelete")
+	if err != nil {
+		t.Fatal(err.Error())
+	}
+	if n.(int64) != 1 {
+		t.Fatalf("wrong result: %v", n)
+	}
+
+	n, err = bdeleteCommand(db, "test_bdelete_not_exit")
+	if err != nil {
+		t.Fatal(err.Error())
+	}
+	if n.(int64) != 0 {
+		t.Fatalf("wrong result: %v", n)
+	}
+}
+
+func TestBSetbitCommand(t *testing.T) {
+	db := getTestDB()
+	_, err := bsetbitCommand(db, "test_bsetbit", "a", "b", "c")
+	if err == nil || err.Error() != "ERR wrong number of arguments for 'bsetbit' command" {
+		t.Fatalf("invalid err %v", err)
+	}
+	n, err := bsetbitCommand(db, "test_bsetbit", "1", "1")
+	if err != nil {
+		t.Fatal(err.Error())
+	}
+	if n.(uint8) != 0 {
+		t.Fatal("wrong result: %v", n)
+	}
+	n, err = db.BGetBit([]byte("test_bsetbit"), 1)
+	if err != nil {
+		t.Fatal(err.Error())
+	}
+	if n.(uint8) != 1 {
+		t.Fatalf("wrong result: %v", n)
+	}
+}
+
+func TestBMsetbitCommand(t *testing.T) {
+	db := getTestDB()
+	_, err := bmsetbitCommand(db, "test_bmsetbit", "a", "b", "c")
+
+	if err == nil || err.Error() != "ERR wrong number of arguments for 'bmsetbit' command" {
+		t.Fatalf("invalid err %v", err)
+	}
+	n, err := bmsetbitCommand(db, "test_bmsetbit", "1", "1", "3", "1")
+	if err != nil {
+		t.Fatal(err.Error())
+	}
+	if n.(int64) != 2 {
+		t.Fatalf("wrong result: %v", n)
+	}
+}
diff --git a/server/http/handler.go b/server/http/handler.go
index 34aa24f..d395534 100644
--- a/server/http/handler.go
+++ b/server/http/handler.go
@@ -41,13 +41,16 @@ func (h *CmdHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 }
 
 func (h *CmdHandler) parseReqPath(path string) (db int, cmd string, args []string) {
+	/*
+	   the proper format of `path`  is /cmd/arg1/arg2/../argN  or  /db/cmd/arg1/arg2/../argN
+	   if `path` is the first kind, `db` will be 0
+	*/
 	substrings := strings.Split(strings.TrimLeft(path, "/"), "/")
 	if len(substrings) == 1 {
 		return 0, substrings[0], substrings[1:]
 	}
 	db, err := strconv.Atoi(substrings[0])
 	if err != nil {
-		//       db = 0
 		cmd = substrings[0]
 		args = substrings[1:]
 	} else {