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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_IF-
       MODSINCE	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_CONDI-
       TION_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
       This functionality affects http only

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
       Added in	curl 7.1

RETURN VALUE
       curl_easy_setopt(3) returns a CURLcode indicating success or error.

       CURLE_OK	(0) means everything was OK, non-zero means an error occurred,
       see libcurl-errors(3).

SEE ALSO
       CURLINFO_FILETIME(3), CURLOPT_TIMEVALUE(3)

libcurl				  2025-06-03	      CURLOPT_TIMECONDITION(3)

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