Manpages - CURLOPT_DNS_USE_GLOBAL_CACHE.3

CURLOPT_DNS_USE_GLOBAL_CACHE - global DNS cache

#include <curl/curl.h>

CURLcode curl_easy_setopt(CURL *handle, CURLOPT_DNS_USE_GLOBAL_CACHE, long enable);

Has no function since 7.62.0. Do not use!

Pass a long. If the enable value is 1, it tells curl to use a global DNS cache that will survive between easy handle creations and deletions. This is not thread-safe and this will use a global variable.

WARNING: this option is considered obsolete. Stop using it. Switch over to using the share interface instead! See CURLOPT_SHARE(3) and curl_share_init(3).

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  CURL *curl = curl_easy_init();
  if(curl) {
    CURLcode ret;
    curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/");
    /* switch off the use of a global, thread unsafe, cache */
    curl_easy_setopt(curl, CURLOPT_DNS_USE_GLOBAL_CACHE, 0L);
    ret = curl_easy_perform(curl);
    curl_easy_cleanup(curl);
  }

Deprecated since 7.62.0. Has no function.

Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.

*CURLOPT_SHARE*(3), *CURLOPT_DNS_CACHE_TIMEOUT*(3),