Method has_param

external/cpp-httplib/httplib.h:4533–4535

    }

    inline bool Request::has_param(const char* key) const {
        return params.find(key) != params.end();
    }

    inline std::string Request::get_param_value(const char* key, size_t id) const {
        auto rng = params.equal_range(key);