CURLOPT_TIMECONDITION(3)   Library Functions Manual   CURLOPT_TIMECONDITION(3)

NAME
       CURLOPT_TIMECONDITION - select condition for a time request

SYNOPSIS
       #include <curl/curl.h>

       CURLcode curl_easy_setopt(CURL *handle, CURLOPT_TIMECONDITION, long cond);

DESCRIPTION
       Pass a long as parameter. This defines how the CURLOPT_TIMEVALUE(3)
       time value is treated. You can set this parameter to
       CURL_TIMECOND_IFMODSINCE or CURL_TIMECOND_IFUNMODSINCE.

       The last modification time of a file is not always known and in such
       instances this feature has no effect even if the given time condition
       would not have been met. curl_easy_getinfo(3) with the
       CURLINFO_CONDITION_UNMET option can be used after a transfer to learn
       if a zero-byte successful "transfer" was due to this condition not
       matching.

DEFAULT
       CURL_TIMECOND_NONE (0)

PROTOCOLS
       HTTP

EXAMPLE
       int main(void)
       {
         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 */
           curl_easy_perform(curl);
         }
       }

AVAILABILITY
       Always

RETURN VALUE
       Returns CURLE_OK

SEE ALSO
       CURLINFO_FILETIME(3), CURLOPT_TIMEVALUE(3)

libcurl                          April 26 2024        CURLOPT_TIMECONDITION(3)