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CURLINFO_C...TION_UNMET(3) Library Functions Manual CURLINFO_C...TION_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  pro-
       vided  in  the  previous	 request did not match (see CURLOPT_TIMECONDI-
       TION(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 gets a zero stored if the condition in-
       stead 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
       This functionality affects http only

EXAMPLE
       int main(void)
       {
	 CURL *curl = curl_easy_init();
	 if(curl) {
	   CURLcode res;

	   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	curl 7.19.4

RETURN VALUE
       curl_easy_getinfo(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
       CURLOPT_TIMECONDITION(3),  CURLOPT_TIMEVALUE(3),	 curl_easy_getinfo(3),
       curl_easy_setopt(3)

libcurl				  2025-06-03	    CURLINFO_C...TION_UNMET(3)

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