updated folder scanning code

src/client_backend/connect.h

@@ -1,6 +1,10 @@
 #pragma once
 #include <iostream>
+#include <iomanip>
+#include <sstream>
+#include <locale>
 #include <string>
 #include <curl/curl.h>
 int connect_to_srv(const char* url, char* out, int max_len, bool ignore_insecure);
-int download_file_from_srv(const char* url, const char* outputFileName);
+int download_file_from_srv(const char* url, const char* outputFileName);
+int call_srv(const char*, const char*,const char*);