NAME

CURLINFO_CONDITION_UNMET - get info on unmet time conditional or 304 HTTP response.

SYNOPSIS

#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 will get 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

CURL *curl = curl_easy_init();
if(curl) {


  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.