81 lines
1.9 KiB
Markdown
81 lines
1.9 KiB
Markdown
|
---
|
||
|
|
c: Copyright (C) Daniel Stenberg, <daniel.se>, et al.
|
||
|
|
SPDX-License-Identifier: curl
|
||
|
|
Title: CURLINFO_CONDITION_UNMET
|
||
|
|
Section: 3
|
||
|
|
Source: libcurl
|
||
|
|
See-also:
|
||
|
|
- CURLOPT_TIMECONDITION (3)
|
||
|
|
- CURLOPT_TIMEVALUE (3)
|
||
|
|
- curl_easy_getinfo (3)
|
||
|
|
- curl_easy_setopt (3)
|
||
|
|
---
|
||
|
|
|
||
|
|
# NAME
|
||
|
|
|
||
|
|
CURLINFO_CONDITION_UNMET - get info on unmet time conditional or 304 HTTP response.
|
||
|
|
|
||
|
|
# SYNOPSIS
|
||
|
|
|
||
|
|
~~~c
|
||
|
|
#include <curl/curl.h>
|
||
|
|
|
||
|
|
CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_CONDITION_UNMET,
|
||
|
|
long *unmet);
|
||
|
|
~~~
|
||
|
|
|
||
|
|
# DESCRIPTION
|
||
|
|
|
||
|
|
Pass a pointer to a long to receive the number 1 if the condition provided in
|
||
|
|
the previous request did not match (see CURLOPT_TIMECONDITION(3)). Alas,
|
||
|
|
if this returns a 1 you know that the reason you did not get data in return is
|
||
|
|
because it did not fulfill the condition. The long this argument points to
|
||
|
|
gets a zero stored if the condition instead was met. This can also return 1 if
|
||
|
|
the server responded with a 304 HTTP status code, for example after sending a
|
||
|
|
custom "If-Match-*" header.
|
||
|
|
|
||
|
|
# PROTOCOLS
|
||
|
|
|
||
|
|
HTTP and some
|
||
|
|
|
||
|
|
# EXAMPLE
|
||
|
|
|
||
|
|
~~~c
|
||
|
|
int main(void)
|
||
|
|
{
|
||
|
|
CURL *curl = curl_easy_init();
|
||
|
|
if(curl) {
|
||
|
|
CURLcode res;
|
||
|
|
|
||
|
|
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
|
||
|
|
|
||
|
|
/* January 1, 2020 is 1577833200 */
|
||
|
|
curl_easy_setopt(curl, CURLOPT_TIMEVALUE, 1577833200L);
|
||
|
|
|
||
|
|
/* If-Modified-Since the above time stamp */
|
||
|
|
curl_easy_setopt(curl, CURLOPT_TIMECONDITION,
|
||
|
|
(long)CURL_TIMECOND_IFMODSINCE);
|
||
|
|
|
||
|
|
/* Perform the request */
|
||
|
|
res = curl_easy_perform(curl);
|
||
|
|
|
||
|
|
if(!res) {
|
||
|
|
/* check the time condition */
|
||
|
|
long unmet;
|
||
|
|
res = curl_easy_getinfo(curl, CURLINFO_CONDITION_UNMET, &unmet);
|
||
|
|
if(!res) {
|
||
|
|
printf("The time condition was %sfulfilled\n", unmet?"NOT":"");
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
~~~
|
||
|
|
|
||
|
|
# AVAILABILITY
|
||
|
|
|
||
|
|
Added in 7.19.4
|
||
|
|
|
||
|
|
# RETURN VALUE
|
||
|
|
|
||
|
|
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
|