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61df5f466c
- curl_ntlm_core, smtp, schannel: fix comments.
- curl_setup.h: fix to undef before define.
- tool_doswin, server/sockfilt: reduce variables scopes.
- tool_doswin: drop an interim variable.
- windows: replace `SOCKET_ERROR` with `0` to align with rest of code.
- libssh2: rename variable to align with rest of code.
- gtls, unit1398: use `#if 0`.
- curl_trc.h, curlx/inet_ntop.h: add missing parentheses in macro
expressions.
- ldap.c: set empty macro to `do {} while(0)`.
- examples/crawler: rename a non-CURLcode `result` variable.
- CURLINFO_TLS_SESSION: drop stray colon.
- add `const` to casts where missing.
- drop unnecessary parentheses.
- fix indent.
- quote style.
- comment style.
- whitespace, newlines, fold/unfold.
Closes #20554
81 lines
2 KiB
Markdown
81 lines
2 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 - 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 result;
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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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result = curl_easy_perform(curl);
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if(result == CURLE_OK) {
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/* check the time condition */
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long unmet;
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result = curl_easy_getinfo(curl, CURLINFO_CONDITION_UNMET, &unmet);
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if(result == CURLE_OK) {
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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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