-static const int DEFAULT_FETCH_RETRIES = 10;
-
-static CURL *curl;
-
-struct ucontent {
- char *data;
- size_t len;
-};
-
-static size_t cbk_curl(void *buffer, size_t size, size_t nmemb, void *userp)
-{
- size_t realsize = size * nmemb;
- struct ucontent *mem = (struct ucontent *)userp;
-
- mem->data = realloc(mem->data, mem->len + realsize + 1);
-
- memcpy(&(mem->data[mem->len]), buffer, realsize);
- mem->len += realsize;
- mem->data[mem->len] = 0;
-
- return realsize;
-}
-
-static void init()
-{
- if (!curl) {
- log_debug(_("initializing CURL"));
- curl_global_init(CURL_GLOBAL_ALL);
- curl = curl_easy_init();
- }
-
- if (!curl)
- exit(EXIT_FAILURE);
-}
-
-static char *fetch_url(const char *url)
-{
- struct ucontent *content = malloc(sizeof(struct ucontent));
- char *result;
- long code;
- int retries;
- unsigned int s;
-
- log_debug(_("fetch_url(): %s"), url);
-
- init();
-
- result = NULL;
-
- retries = DEFAULT_FETCH_RETRIES;
-
- retrieve:
- content->data = malloc(1);
- content->data[0] = '\0';
- content->len = 0;
-
- curl_easy_setopt(curl, CURLOPT_URL, url);
- curl_easy_setopt(curl, CURLOPT_VERBOSE, 0);
- curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, cbk_curl);
- curl_easy_setopt(curl, CURLOPT_WRITEDATA, content);
- curl_easy_setopt(curl, CURLOPT_USERAGENT, "ppastats/0.0");
-
- if (curl_easy_perform(curl) == CURLE_OK) {
- curl_easy_getinfo(curl, CURLINFO_RESPONSE_CODE, &code);
-
- switch (code) {
- case 200:
- result = content->data;
- break;
- case 500:
- case 502:
- case 503:
- case 504:
- log_err(_("Fetch failed with code %ld for URL %s"),
- code,
- url);
-
- if (retries) {
- s = 2 * (DEFAULT_FETCH_RETRIES - retries) + 2;
- log_debug(_("Wait %ds before retry"), s);
- sleep(s);
-
- free(content->data);
- retries--;
- goto retrieve;
- }
-
- break;
- default:
- log_err(_("Fetch failed with code %ld for URL %s"),
- code,
- url);
- }
- }
-
- if (!result)
- free(content->data);
-
- free(content);
-
- return result;
-}
-