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.TH CURLOPT_TIMECONDITION 3 "November 04, 2020" "libcurl 7.77.0" "curl_easy_setopt options"

.SH NAME
CURLOPT_TIMECONDITION \- select condition for a time request
.SH SYNOPSIS
#include <curl/curl.h>

CURLcode curl_easy_setopt(CURL *handle, CURLOPT_TIMECONDITION, long cond);
.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 will have 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
HTTP, FTP, RTSP, and FILE
.SH EXAMPLE
.nf
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, CURL_TIMECOND_IFMODSINCE);

  /* Perform the request */
  curl_easy_perform(curl);
}
.fi
.SH AVAILABILITY
Always
.SH RETURN VALUE
Returns CURLE_OK
.SH "SEE ALSO"
.BR CURLOPT_TIMEVALUE "(3), "
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