81 lines
1.9 KiB
Markdown
81 lines
1.9 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: CURLINFO_CONDITION_UNMET
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Section: 3
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Source: libcurl
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See-also:
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- CURLOPT_TIMECONDITION (3)
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- CURLOPT_TIMEVALUE (3)
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- curl_easy_getinfo (3)
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- curl_easy_setopt (3)
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---
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# NAME
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CURLINFO_CONDITION_UNMET - get info on unmet time conditional or 304 HTTP response.
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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_getinfo(CURL *handle, CURLINFO_CONDITION_UNMET,
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long *unmet);
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~~~
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# DESCRIPTION
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Pass a pointer to a long to receive the number 1 if the condition provided in
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the previous request did not match (see CURLOPT_TIMECONDITION(3)). Alas,
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if this returns a 1 you know that the reason you did not get data in return is
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because it did not fulfill the condition. The long this argument points to
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gets a zero stored if the condition instead was met. This can also return 1 if
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the server responded with a 304 HTTP status code, for example after sending a
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custom "If-Match-*" header.
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# PROTOCOLS
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HTTP and some
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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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CURLcode res;
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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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res = curl_easy_perform(curl);
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if(!res) {
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/* check the time condition */
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long unmet;
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res = curl_easy_getinfo(curl, CURLINFO_CONDITION_UNMET, &unmet);
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if(!res) {
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printf("The time condition was %sfulfilled\n", unmet?"NOT":"");
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}
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}
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}
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}
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~~~
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# AVAILABILITY
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Added in 7.19.4
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# RETURN VALUE
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Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
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