Reusing curl easy handles in C - c

Question

In a C project I want to reuse curl easy handles. The flow of program is like:
Client --> C Application --> Call URL1, do something, Call URL2, do something, Call URL3...
In short, for each client request, the same set of URLs are called.
I initially create the curl easy handle when the program starts. The main program creates a configurable number of child, so each child gets its own easy handle.
static int child_init(int rank) {
LM_NOTICE("init_child [%d] pid [%d]\n", rank, getpid());
pid = my_pid();
curl_global_init(CURL_GLOBAL_ALL);
// initialize curl handle
curl = curl_easy_init();
if (!curl) {
LM_ERR("Child %d: Curl initialization failed.\n", rank);
return -1;
}
//create some connections before actual requests come.
curl_head(URL);
return 0;
}
I created a C file where the functions are created to handle GET/POST/PUT etc requests:
int curl_head(const char* url) {
if (!url) {
LM_ERR("URL not provided. Returning with error.\n");
return -1;
}
CURLcode res;
int http_code = 0;
struct curl_slist *headers = NULL;
headers = curl_slist_append(headers, "charsets: utf-8");
/* set URL */
curl_easy_setopt(curl, CURLOPT_URL, url);
curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headers);
curl_easy_setopt(curl, CURLOPT_CUSTOMREQUEST, "HEAD");
curl_easy_setopt(curl, CURLOPT_NOBODY, 1L);
res = curl_easy_perform(curl);
if (res != CURLE_OK) {
LM_ERR("curl_easy_perform() failed: %s\n", curl_easy_strerror(res));
}
curl_easy_getinfo(curl, CURLINFO_RESPONSE_CODE, &http_code);
LM_DBG("HTTP return CODE %d\n", http_code);
curl_slist_free_all(headers);
curl_easy_reset(curl);
return http_code;
}
int curl_post(const char* url, char *postdata) {
if (!url) {
LM_ERR("URL not provided. Returning with error.\n");
return -1;
}
CURLcode res;
int http_code = 0;
struct curl_slist *headers = NULL;
headers = curl_slist_append(headers, "Accept: application/json");
headers = curl_slist_append(headers, "Content-Type: application/json");
headers = curl_slist_append(headers, "charsets: utf-8");
/* set URL */
curl_easy_setopt(curl, CURLOPT_URL, url);
curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headers);
curl_easy_setopt(curl, CURLOPT_POSTFIELDS, postdata);
curl_easy_setopt(curl, CURLOPT_USERAGENT, "libcrp/0.1");
res = curl_easy_perform(curl);
if (res != CURLE_OK) {
LM_ERR("curl_easy_perform() failed: %s\n", curl_easy_strerror(res));
}
curl_easy_getinfo(curl, CURLINFO_RESPONSE_CODE, &http_code);
curl_slist_free_all(headers);
curl_easy_reset(curl);
return http_code;
}
When somewhere in the program I want to call the WS I call the desired function as curl_post(url).
Am I doing this correctly or are there any flaws in this implementation?