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CURLINFO_CONDITION_UNMET(3)         libcurl        CURLINFO_CONDITION_UNMET(3)

NAME
       CURLINFO_CONDITION_UNMET - get info on unmet time conditional or 304
       HTTP response.

SYNOPSIS
       #include <curl/curl.h>

       CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_CONDITION_UNMET,
                                  long *unmet);

DESCRIPTION
       Pass a pointer to a long to receive the number 1 if the condition
       provided in the previous request did not match (see
       CURLOPT_TIMECONDITION(3)). Alas, if this returns a 1 you know that the
       reason you did not get data in return is because it did not 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.

PROTOCOLS
       HTTP and some

EXAMPLE
       CURL *curl = curl_easy_init();
       if(curl) {
         curl_easy_setopt(curl, CURLOPT_URL, "https://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,
                          (long)CURL_TIMECOND_IFMODSINCE);

         /* Perform the request */
         res = curl_easy_perform(curl);

         if(!res) {
           /* check the time condition */
           long unmet;
           res = curl_easy_getinfo(curl, CURLINFO_CONDITION_UNMET, &unmet);
           if(!res) {
             printf("The time condition was %sfulfilled\n", unmet?"NOT":"");
           }
         }
       }

AVAILABILITY
       Added in 7.19.4

RETURN VALUE
       Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION
       if not.

SEE ALSO
       curl_easy_getinfo(3), curl_easy_setopt(3),

libcurl 8.1.2                   April 26, 2023     CURLINFO_CONDITION_UNMET(3)