Function encode_query_param

external/cpp-httplib/httplib.h:2032–2052

        }

        inline std::string encode_query_param(const std::string& value) {
            std::ostringstream escaped;
            escaped.fill('0');
            escaped << std::hex;

            for (auto c : value) {
                if (std::isalnum(static_cast<uint8_t>(c)) || c == '-' || c == '_' ||
                    c == '.' || c == '!' || c == '~' || c == '*' || c == '\'' || c == '(' ||
                    c == ')') {
                    escaped << c;
                }
                else {
                    escaped << std::uppercase;
                    escaped << '%' << std::setw(2)
                        << static_cast<int>(static_cast<unsigned char>(c));
                    escaped << std::nouppercase;
                }
            }

            return escaped.str();
        }

        inline std::string encode_url(const std::string& s) {
            std::string result;