CURLINFO_CONDITION_UNMET − get info on unmet time conditional or 304 HTTP response.
CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_CONDITION_UNMET, long *unmet);
Pass a pointer to a long to receive the number 1 if the condition provided in the previous request didn’t match (see CURLOPT_TIMECONDITION(3)). Alas, if this returns a 1 you know that the reason you didn’t get data in return is because it didn’t fulfill the condition. The long this argument points to will get a zero stored if the condition instead was met. This can also return 1 if the server responded with a 304 HTTP status code, for example after sending a custom "If-Match-*" header.
HTTP and some
CURL *curl =
curl_easy_setopt(curl, CURLOPT_URL, "http://example.com");
/* January 1,
2020 is 1577833200 */
curl_easy_setopt(curl, CURLOPT_TIMEVALUE, 1577833200L);
If-Modified-Since the above time stamp */
curl_easy_setopt(curl, CURLOPT_TIMECONDITION, CURL_TIMECOND_IFMODSINCE);
/* Perform the
res = curl_easy_perform(curl);
/* check the time condition */
res = curl_easy_getinfo(curl, CURLINFO_CONDITION_UNMET, &unmet);
printf("The time condition was %sfulfilled\n", unmet?"NOT":"");
Added in 7.19.4
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.