C/Visual C - obtener links de una página web des de C++

#include <iostream>

#include <string>

#include <vector>

#include <curl/curl.h>

#include <regex>

size_t WriteCallback(void* contents, size_t size, size_t nmemb, void* userp) {

    ((std::string*)userp)->append((char*)contents, size * nmemb);

    return size * nmemb;

}

std::vector<std::string> ExtractLinks(const std::string& html) {

    std::vector<std::string> links;

    std::regex url_regex(R"(<a\s+(?:[^>]*?\s+)?href="([^"]*)")");

    std::smatch url_match;

    std::string::const_iterator search_start(html.cbegin());

    while (std::regex_search(search_start, html.cend(), url_match, url_regex)) {

        links.push_back(url_match[1]);

        search_start = url_match.suffix().first;

    }

    return links;

}

int main() {

    CURL* curl;

    CURLcode res;

    std::string readBuffer;

    curl_global_init(CURL_GLOBAL_DEFAULT);

    curl = curl_easy_init();

    if (curl) {

        curl_easy_setopt(curl, CURLOPT_URL, "https://www.ejemplo.com");

        curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, WriteCallback);

        curl_easy_setopt(curl, CURLOPT_WRITEDATA, &readBuffer);

        res = curl_easy_perform(curl);

        curl_easy_cleanup(curl);

        if (res == CURLE_OK) {

            std::vector<std::string> links = ExtractLinks(readBuffer);

            std::cout << "Enlaces encontrados:\n";

            for (const auto& link : links) {

                std::cout << link << std::endl;

            }

        } else {

            std::cerr << "Error al realizar la solicitud: " << curl_easy_strerror(res) << std::endl;

        }

    }

    curl_global_cleanup();

    return 0;

}