diff --git a/include/server/response.h b/include/server/response.h
index e6ecfce..23f0c01 100644
--- a/include/server/response.h
+++ b/include/server/response.h
@@ -14,9 +14,9 @@ void res_not_exist(mg_connection* conn);
 void res_permission_denied(mg_connection* conn);
 void res_need_user_id(mg_connection* conn);
 void res_need_password(mg_connection* conn);
-void res_(mg_connection* conn);
-void res_(mg_connection* conn);
-void res_(mg_connection* conn);
+void res_need_action(mg_connection* conn);
+void res_bad_action(mg_connection* conn);
+void res_need_xxx(mg_connection* conn,const char* xxx);
 void res_(mg_connection* conn);
 
 
diff --git a/src/server/response.c b/src/server/response.c
index 4856937..6cf1de0 100644
--- a/src/server/response.c
+++ b/src/server/response.c
@@ -225,3 +225,30 @@ void res_repermission(mg_connection* conn)
               "Access-Control-Allow-Origin: *\r\n\r\n"
               "{\"success\":\"repermission success\"}");
 }
+void res_need_action(mg_connection* conn)
+{
+    mg_printf(conn,
+              "HTTP/1.1 400 Bad Request\r\n"
+              "Content-Type: application/json\r\n"
+              "Access-Control-Allow-Origin: *\r\n\r\n"
+              "{\"error\":\"need action specification\"}");
+}
+
+void res_bad_action(mg_connection* conn)
+{
+    mg_printf(conn,
+              "HTTP/1.1 400 Bad Request\r\n"
+              "Content-Type: application/json\r\n"
+              "Access-Control-Allow-Origin: *\r\n\r\n"
+              "{\"error\":\"bad action\"}");
+}
+
+void res_need_xxx(mg_connection* conn, const char* xxx)
+{
+    mg_printf(conn,
+              "HTTP/1.1 400 Bad Request\r\n"
+              "Content-Type: application/json\r\n"
+              "Access-Control-Allow-Origin: *\r\n\r\n"
+              "{\"error\":\"need %s\"}",
+              xxx);
+}