curl.cpp

#include <iostream>
#include <string>
#include <curl/curl.h>

static size_t WriteCallback(void *contents, size_t size, size_t nmemb, void *userp)
{
    ((std::string*)userp)->append((char*)contents, size * nmemb);
    return size * nmemb;
}

// https://curl.se/libcurl/c/libcurl-tutorial.html
// https://stackoverflow.com/questions/11600130/post-data-with-libcurl
// https://curl.se/libcurl/c/example.html
// https://dev.to/hi_artem/using-libcurl-in-c-c-application-4668
int main(void)
{
    CURL *curl;
    CURLcode res;
    std::string readBuffer;

    curl = curl_easy_init();
    if(curl) {
        curl_easy_setopt(curl, CURLOPT_URL, "http://www.google.com");
        curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, WriteCallback);
        curl_easy_setopt(curl, CURLOPT_WRITEDATA, &readBuffer);
        res = curl_easy_perform(curl);
        curl_easy_cleanup(curl);

        std::cout << readBuffer << std::endl;
    }
    return 0;
}