Provided by: libcurl4-doc_8.9.1-2ubuntu2.1_all
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)