NAME¶

CURLOPT_DNS_USE_GLOBAL_CACHE - 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 survives between easy handle creations and deletions. This is not thread-safe and this uses a global variable.

See CURLOPT_SHARE(3) and curl_share_init(3) for the correct way to share DNS cache between transfers.

DEFAULT¶

0

PROTOCOLS¶

This functionality affects all supported protocols

EXAMPLE¶

int main(void)
{


  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¶

Deprecated since 7.11.1. Functionality removed in 7.62.0.

AVAILABILITY¶

Added in curl 7.9.3

RETURN VALUE¶

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

SEE ALSO¶

CURLOPT_DNS_CACHE_TIMEOUT(3), CURLOPT_SHARE(3)