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e3fe020089
Remove the PROTOCOLS section from the source files completely and instead generate them based on the header data in the curldown files. It also generates TLS backend information for options marked for TLS as protocol. Closes #13175
70 lines
1.5 KiB
Markdown
70 lines
1.5 KiB
Markdown
---
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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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Protocol:
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- HTTP
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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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# 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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