diff --git a/cpp/httpclientpool.cc b/cpp/httpclientpool.cc
index 44e03bd..f043dc4 100644
--- a/cpp/httpclientpool.cc
+++ b/cpp/httpclientpool.cc
@@ -51,6 +51,7 @@ namespace f8
         std::string url_params;
         std::string content;
         a8::XObject headers;
+        std::map<std::string, std::string> kv_params;
         AsyncHttpNode* nextnode = nullptr;
     };
 
@@ -162,9 +163,14 @@ namespace f8
             }
         }
 
+        void ProcSign(AsyncHttpNode* node)
+        {
+
+        }
 
         void ProcAsyncHttp(AsyncHttpNode* node)
         {
+            ProcSign(node);
             std::string finally_url;
             if (node->url.find('?') != std::string::npos) {
                 finally_url = node->url + node->url_params;
@@ -388,6 +394,7 @@ namespace f8
                 node->method = method;
                 node->url = url;
                 url_params.ToUrlEncodeStr(node->url_params);
+                //                url_params.ToKVList(node->kv_params);
                 node->content = std::string(content);
                 if (headers) {
                     headers->DeepCopy(node->headers);