.\" generated by cd2nroff 0.1 from CURLOPT_TIMECONDITION.md .TH CURLOPT_TIMECONDITION 3 "2024-11-07" libcurl .SH NAME CURLOPT_TIMECONDITION \- select condition for a time request .SH SYNOPSIS .nf #include CURLcode curl_easy_setopt(CURL *handle, CURLOPT_TIMECONDITION, long cond); .fi .SH DESCRIPTION Pass a long as parameter. This defines how the \fICURLOPT_TIMEVALUE(3)\fP time value is treated. You can set this parameter to \fICURL_TIMECOND_IFMODSINCE\fP or \fICURL_TIMECOND_IFUNMODSINCE\fP. 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. \fIcurl_easy_getinfo(3)\fP with the \fICURLINFO_CONDITION_UNMET\fP option can be used after a transfer to learn if a zero\-byte successful \&"transfer" was due to this condition not matching. .SH DEFAULT CURL_TIMECOND_NONE (0) .SH PROTOCOLS This functionality affects http only .SH EXAMPLE .nf 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); } } .fi .SH AVAILABILITY Added in curl 7.1 .SH RETURN VALUE Returns CURLE_OK .SH SEE ALSO .BR CURLINFO_FILETIME (3), .BR CURLOPT_TIMEVALUE (3)