I wanna do first a call using cURL into a JSON and save the respond buffer body in array/memory and then to be able to loop thought this array/memory and get each saved line, then to do my comparisons, i tried to follow https://curl.se/libcurl/c/getinmemory.html cURL code example but im stuck in how to loop thought the saved ‘chunk.memory’ buffer to get each saved line, any help is appreciated.

I wanna do the loop under else { config_status("Received data: %*\n", chunk.memory); } where chunk.memory supposed to be the memory buffer there.

NOTE: I am a C beginner 😛

struct MemoryStruct {
  char *memory;
  size_t size;
};

static size_t WriteMemoryCallback(void *contents, size_t size, size_t nmemb, void *userp) {
  size_t realsize = size * nmemb;
  struct MemoryStruct *mem = (struct MemoryStruct *)userp;
 
  char *ptr = realloc(mem->memory, mem->size + realsize + 1);

  if (!ptr) {
    /* out of memory! */
    //printf("not enough memory (realloc returned NULL)\n");

    return 0;
  }
 
  mem->memory = ptr;

  memcpy(&(mem->memory[mem->size]), contents, realsize);

  mem->size += realsize;
  mem->memory[mem->size] = 0;
 
  return realsize;
}

int check_ip(char *ip) {
    CURL *curl;
    CURLcode res;

    struct MemoryStruct chunk;
 
    chunk.memory = malloc(1);
    chunk.size = 0;

    char *url = "http://proxycheck.io/v2/204.225.96.123?key=10i9s3-685432-3f2774-t14562&vpn=1&asn=1&risk=1&port=1&days=7";

    curl = curl_easy_init();

    if (curl) {
        curl_easy_setopt(curl, CURLOPT_URL, url);
        curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, 0);
        curl_easy_setopt(curl, CURLOPT_CUSTOMREQUEST, "GET");
        curl_easy_setopt(curl, CURLOPT_USERAGENT, "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:100.0) Gecko/20100101 Firefox/100.0");

        /*
        struct curl_slist *headers = NULL;

        headers = curl_slist_append(headers, "length: 20");
        headers = curl_slist_append(headers, "numbers: true");

        curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headers);
        */

        curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, WriteMemoryCallback);
        curl_easy_setopt(curl, CURLOPT_WRITEDATA, (void *)&chunk);

        res = curl_easy_perform(curl);

        if (res != CURLE_OK) { config_error("curl_easy_perform() failed: %s\n", curl_easy_strerror(res)); }
        else { config_status("Received data: %*\n", chunk.memory); }

        // response log file (by config_status() func)
        // Received data: {

        free(chunk.memory);      
    
        curl_easy_cleanup(curl);
    }

    return 0;
}