quickjs-tart

quickjs-based runtime for wallet-core logic
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CURLINFO_CONDITION_UNMET.md (2016B)

      1 ---
      2 c: Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
      3 SPDX-License-Identifier: curl
      4 Title: CURLINFO_CONDITION_UNMET
      5 Section: 3
      6 Source: libcurl
      7 See-also:
      8   - CURLOPT_TIMECONDITION (3)
      9   - CURLOPT_TIMEVALUE (3)
     10   - curl_easy_getinfo (3)
     11   - curl_easy_setopt (3)
     12 Protocol:
     13   - HTTP
     14 Added-in: 7.19.4
     15 ---
     16 
     17 # NAME
     18 
     19 CURLINFO_CONDITION_UNMET - get info on unmet time conditional or 304 HTTP response.
     20 
     21 # SYNOPSIS
     22 
     23 ~~~c
     24 #include <curl/curl.h>
     25 
     26 CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_CONDITION_UNMET,
     27                            long *unmet);
     28 ~~~
     29 
     30 # DESCRIPTION
     31 
     32 Pass a pointer to a long to receive the number 1 if the condition provided in
     33 the previous request did not match (see CURLOPT_TIMECONDITION(3)). Alas,
     34 if this returns a 1 you know that the reason you did not get data in return is
     35 because it did not fulfill the condition. The long this argument points to
     36 gets a zero stored if the condition instead was met. This can also return 1 if
     37 the server responded with a 304 HTTP status code, for example after sending a
     38 custom "If-Match-*" header.
     39 
     40 # %PROTOCOLS%
     41 
     42 # EXAMPLE
     43 
     44 ~~~c
     45 int main(void)
     46 {
     47   CURL *curl = curl_easy_init();
     48   if(curl) {
     49     CURLcode res;
     50 
     51     curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
     52 
     53     /* January 1, 2020 is 1577833200 */
     54     curl_easy_setopt(curl, CURLOPT_TIMEVALUE, 1577833200L);
     55 
     56     /* If-Modified-Since the above time stamp */
     57     curl_easy_setopt(curl, CURLOPT_TIMECONDITION,
     58                      (long)CURL_TIMECOND_IFMODSINCE);
     59 
     60     /* Perform the request */
     61     res = curl_easy_perform(curl);
     62 
     63     if(!res) {
     64       /* check the time condition */
     65       long unmet;
     66       res = curl_easy_getinfo(curl, CURLINFO_CONDITION_UNMET, &unmet);
     67       if(!res) {
     68         printf("The time condition was %sfulfilled\n", unmet?"NOT":"");
     69       }
     70     }
     71   }
     72 }
     73 ~~~
     74 
     75 # %AVAILABILITY%
     76 
     77 # RETURN VALUE
     78 
     79 curl_easy_getinfo(3) returns a CURLcode indicating success or error.
     80 
     81 CURLE_OK (0) means everything was OK, non-zero means an error occurred, see
     82 libcurl-errors(3).