72 lines
1.6 KiB
Markdown
72 lines
1.6 KiB
Markdown
---
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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_MAXAGE_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_MAXLIFETIME_CONN (3)
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- CURLOPT_TIMEOUT (3)
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---
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# NAME
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CURLOPT_MAXAGE_CONN - max idle time 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_MAXAGE_CONN, long age);
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~~~
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# DESCRIPTION
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Pass a long as parameter containing *age* - the maximum time in seconds
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allowed for an existing connection to have been idle to be considered for
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reuse for this request.
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The "connection cache" holds previously used connections. When a new request
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is to be done, libcurl considers any connection that matches for reuse. The
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CURLOPT_MAXAGE_CONN(3) limit prevents libcurl from trying too old
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connections for reuse, since old connections have a higher risk of not working
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and thus trying them is a performance loss and sometimes service loss due to
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the difficulties to figure out the situation. If a connection is found in the
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cache that is older than this set *age*, it is closed instead.
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# DEFAULT
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Default maximum age is set to 118 seconds.
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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 30 seconds idle time */
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curl_easy_setopt(curl, CURLOPT_MAXAGE_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 7.65.0
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# RETURN VALUE
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Returns CURLE_OK.
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