NAME¶

CURLOPT_DNS_USE_GLOBAL_CACHE - enable/disable global DNS cache

SYNOPSIS¶

#include <curl/curl.h>

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

DESCRIPTION¶

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).

DEFAULT¶

0

PROTOCOLS¶

All

EXAMPLE¶

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);
}

AVAILABILITY¶

Deprecated since 7.62.0. Has no function.

RETURN VALUE¶

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

SEE ALSO¶

CURLOPT_SHARE(3), CURLOPT_DNS_CACHE_TIMEOUT(3),