Function append_query_params

examples/server/httplib.h:4795–4802

}

inline std::string append_query_params(const std::string &path,
                                       const Params &params) {
  std::string path_with_query = path;
  const static std::regex re("[^?]+\\?.*");
  auto delm = std::regex_match(path, re) ? '&' : '?';
  path_with_query += delm + detail::params_to_query_str(params);
  return path_with_query;
}

// Header utilities
inline std::pair<std::string, std::string> make_range_header(Ranges ranges) {