73 lines
1.5 KiB
Markdown
73 lines
1.5 KiB
Markdown
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---
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c: Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
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SPDX-License-Identifier: curl
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Title: CURLOPT_TIMECONDITION
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Section: 3
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Source: libcurl
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See-also:
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- CURLINFO_FILETIME (3)
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- CURLOPT_TIMEVALUE (3)
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---
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# NAME
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CURLOPT_TIMECONDITION - select condition for a time request
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# SYNOPSIS
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~~~c
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#include <curl/curl.h>
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CURLcode curl_easy_setopt(CURL *handle, CURLOPT_TIMECONDITION, long cond);
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~~~
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# DESCRIPTION
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Pass a long as parameter. This defines how the CURLOPT_TIMEVALUE(3) time
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value is treated. You can set this parameter to *CURL_TIMECOND_IFMODSINCE*
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or *CURL_TIMECOND_IFUNMODSINCE*.
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The last modification time of a file is not always known and in such instances
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this feature has no effect even if the given time condition would not have
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been met. curl_easy_getinfo(3) with the *CURLINFO_CONDITION_UNMET*
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option can be used after a transfer to learn if a zero-byte successful
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"transfer" was due to this condition not matching.
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# DEFAULT
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CURL_TIMECOND_NONE (0)
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# PROTOCOLS
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HTTP, FTP, RTSP, and FILE
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# EXAMPLE
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~~~c
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int main(void)
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{
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CURL *curl = curl_easy_init();
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if(curl) {
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curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
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/* January 1, 2020 is 1577833200 */
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curl_easy_setopt(curl, CURLOPT_TIMEVALUE, 1577833200L);
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/* If-Modified-Since the above time stamp */
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curl_easy_setopt(curl, CURLOPT_TIMECONDITION,
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(long)CURL_TIMECOND_IFMODSINCE);
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/* Perform the request */
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curl_easy_perform(curl);
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}
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}
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~~~
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# AVAILABILITY
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Always
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# RETURN VALUE
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Returns CURLE_OK
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