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Some CURLOPT constants defined in the curl public headers were initially enums (= ints), or macros with bare numeric values. Recent curl releases upgraded them to `long` constants, to make them pass correctly to `curl_easy_setop()` by default, i.e. without requiring a `(long)` cast. This patch drops such casts from the examples embedded in the docs. At the same time it documents which curl release made them `long` types, to keep them useful when working with previous libcurl versions. Also: - drop a `(long)` cast that was never necessary. - CURLOPT_ALTSVC_CTRL.md: bump local copy of macros to long. - test1119: make it ignore symbols ending with an underscore, to skip wildcard, e.g. `**CURLAUTH_***`. Closes #18130
81 lines
1.9 KiB
Markdown
81 lines
1.9 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: 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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Protocol:
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- HTTP
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Added-in: 7.19.4
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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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# 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, 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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# RETURN VALUE
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curl_easy_getinfo(3) returns a CURLcode indicating success or error.
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CURLE_OK (0) means everything was OK, non-zero means an error occurred, see
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libcurl-errors(3).
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