ParsedURI result;

auto value_or = [](const std::string& value, std::string&& deflt) -> std::string {

return (value.empty() ? deflt : value);

};

// Note: only "http", "https", "ws", and "wss" protocols are supported

static const std::regex PARSE_URL{R"((([httpsw]{2,5})://)?([^/ :]+)(:(\d+))?(/([^ ?]+)?)?/?\??([^/ ]+\=[^/ ]+)?)",

std::regex_constants::ECMAScript | std::regex_constants::icase};

std::smatch match;

if (std::regex_match(url, match, PARSE_URL) && match.size() == 9) {

result.protocol = value_or(boost::algorithm::to_lower_copy(std::string(match[2])), "http");

result.domain = match[3];

const bool is_sequre_protocol = (result.protocol == "https" || result.protocol == "wss");

result.port = value_or(match[5], (is_sequre_protocol) ? "443" : "80");

result.resource = value_or(match[6], "/");

result.query = match[8];

if (result.domain.empty()) {

throw std::invalid_argument("domain cannot be empty");

}

}

return result;