74 lines
1.7 KiB
Markdown
74 lines
1.7 KiB
Markdown
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---
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c: Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
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SPDX-License-Identifier: curl
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Title: CURLOPT_MAXLIFETIME_CONN
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Section: 3
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Source: libcurl
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See-also:
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- CURLOPT_FORBID_REUSE (3)
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- CURLOPT_FRESH_CONNECT (3)
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- CURLOPT_MAXAGE_CONN (3)
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- CURLOPT_TIMEOUT (3)
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---
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# NAME
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CURLOPT_MAXLIFETIME_CONN - max lifetime (since creation) allowed for reusing a connection
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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_MAXLIFETIME_CONN,
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long maxlifetime);
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~~~
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# DESCRIPTION
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Pass a long as parameter containing *maxlifetime* - the maximum time in
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seconds, since the creation of the connection, that you allow an existing
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connection to have to be considered for reuse for this request.
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libcurl features a connection cache that holds previously used connections.
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When a new request is to be done, libcurl considers any connection that
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matches for reuse. The CURLOPT_MAXLIFETIME_CONN(3) limit prevents
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libcurl from trying too old connections for reuse. This can be used for
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client-side load balancing. If a connection is found in the cache that is
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older than this set *maxlifetime*, it is instead marked for closure.
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If set to 0, this behavior is disabled: all connections are eligible for reuse.
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# DEFAULT
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Default *maxlifetime* is 0 seconds (i.e., disabled).
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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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curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
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/* only allow each connection to be reused for 30 seconds */
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curl_easy_setopt(curl, CURLOPT_MAXLIFETIME_CONN, 30L);
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curl_easy_perform(curl);
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}
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}
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~~~
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# AVAILABILITY
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Added in 7.80.0
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# RETURN VALUE
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Returns CURLE_OK.
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