69 lines
1.3 KiB
Markdown
69 lines
1.3 KiB
Markdown
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---
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c: Copyright (C) Daniel Stenberg, <daniel.se>, et al.
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SPDX-License-Identifier: curl
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Title: CURLOPT_DNS_USE_GLOBAL_CACHE
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Section: 3
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Source: libcurl
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See-also:
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- CURLOPT_DNS_CACHE_TIMEOUT (3)
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- CURLOPT_SHARE (3)
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---
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# NAME
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CURLOPT_DNS_USE_GLOBAL_CACHE - global DNS cache
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# SYNOPSIS
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~~~c
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#include <curl/curl.h>
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CURLcode curl_easy_setopt(CURL *handle, CURLOPT_DNS_USE_GLOBAL_CACHE,
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long enable);
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~~~
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# DESCRIPTION
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Has no function since 7.62.0. Do not use!
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Pass a long. If the *enable* value is 1, it tells curl to use a global DNS
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cache that survives between easy handle creations and deletions. This is not
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thread-safe and this uses a global variable.
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See CURLOPT_SHARE(3) and curl_share_init(3) for the correct way to
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share DNS cache between transfers.
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# DEFAULT
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0
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# PROTOCOLS
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All
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# EXAMPLE
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~~~c
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int main(void)
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{
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CURL *curl = curl_easy_init();
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if(curl) {
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CURLcode ret;
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curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/");
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/* switch off the use of a global, thread unsafe, cache */
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curl_easy_setopt(curl, CURLOPT_DNS_USE_GLOBAL_CACHE, 0L);
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ret = curl_easy_perform(curl);
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curl_easy_cleanup(curl);
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}
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}
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~~~
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# AVAILABILITY
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Deprecated since 7.11.1. Function removed in 7.62.0.
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# RETURN VALUE
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Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
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