C++ cURL problems with csrf token - c++

Question

I want to post a query to leetcode/graphql and get problems' list in JSON. But I faced problems with csrf token. I'm pretty new at web stuffs and I can`t figure how to resolve the issue.
My code:
void request(bool isGet = true, std::string csrf = "") {
static std::string query =
"query allQuestionsRaw{"
"allQuestions: allQuestionsRaw {"
"title"
"titleSlug"
"translatedTitle"
"questionId"
"questionFrontendId"
"status"
"difficulty"
"isPaidOnly"
"categoryTitle"
"__typename"
"}"
"}";
std::string headers = "Content-Type: application/json";
curl_slist* hdrsl = NULL;
hdrsl = curl_slist_append(hdrsl, headers.c_str());
hdrsl = curl_slist_append(hdrsl, "User-agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko)
Chrome/103.0.0.0 Safari/537.36");
hdrsl = curl_slist_append(hdrsl, "Accept: */*");
hdrsl = curl_slist_append(hdrsl, "Host: leetcode.com");
CURL* curl;
curl = curl_easy_init();
FILE* fd = fopen("tasks.json", "w");
curl_easy_setopt(curl, CURLOPT_URL, "https://leetcode.com/graphql");
curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, FALSE);
if (!isGet)
{
curl_easy_setopt(curl, CURLOPT_POST, 1);
curl_easy_setopt(curl, CURLOPT_POSTFIELDS, query.c_str());
}
curl_easy_setopt(curl, CURLOPT_REFERER, "https://leetcode.com/problemset/all/?page=2");
if (!isGet)
{
curl_easy_setopt(curl, CURLOPT_HTTPHEADER, hdrsl);
}
curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, TRUE);
curl_easy_setopt(curl, CURLOPT_VERBOSE, TRUE);
curl_easy_setopt(curl, CURLOPT_COOKIESESSION, TRUE);
if (isGet)
{
curl_easy_setopt(curl, CURLOPT_COOKIEJAR, "csrftoken");
curl_easy_setopt(curl, CURLOPT_COOKIEFILE, "csrftoken");
}
else
{
curl_easy_setopt(curl, CURLOPT_COOKIE, "csrftoken=" + csrf);
}
curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, NULL);
curl_easy_setopt(curl, CURLOPT_WRITEDATA, fd);
curl_easy_perform(curl);
curl_easy_cleanup(curl);
}
At first I do GET request to receive csrf token. After that i parse token from the file and do POST request. But all response i get is: error 403, CSRF verification failed. Request aborted.
Any ideas how to resolve this? Thank you.