73 lines
2.7 KiB
Groff
73 lines
2.7 KiB
Groff
.\" **************************************************************************
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.\" * _ _ ____ _
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.\" * Project ___| | | | _ \| |
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.\" * / __| | | | |_) | |
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.\" * | (__| |_| | _ <| |___
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.\" * \___|\___/|_| \_\_____|
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.\" *
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.\" * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
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.\" *
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.\" * This software is licensed as described in the file COPYING, which
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.\" * you should have received as part of this distribution. The terms
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.\" * are also available at https://curl.se/docs/copyright.html.
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.\" *
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.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
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.\" * copies of the Software, and permit persons to whom the Software is
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.\" * furnished to do so, under the terms of the COPYING file.
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.\" *
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.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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.\" * KIND, either express or implied.
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.\" *
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.\" * SPDX-License-Identifier: curl
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.\" *
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.\" **************************************************************************
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.\"
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.TH CURLOPT_MAXLIFETIME_CONN 3 "10 Nov 2021" libcurl libcurl
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.SH NAME
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CURLOPT_MAXLIFETIME_CONN \- max lifetime (since creation) allowed for reusing a connection
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.SH SYNOPSIS
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.nf
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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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.fi
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.SH DESCRIPTION
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Pass a long as parameter containing \fImaxlifetime\fP - 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 \fICURLOPT_MAXLIFETIME_CONN(3)\fP 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 \fImaxlifetime\fP, 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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.SH DEFAULT
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Default \fImaxlifetime\fP is 0 seconds (i.e., disabled).
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.SH PROTOCOLS
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All
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.SH EXAMPLE
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.nf
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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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.fi
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.SH AVAILABILITY
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Added in 7.80.0
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.SH RETURN VALUE
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Returns CURLE_OK.
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.SH "SEE ALSO"
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.BR CURLOPT_FORBID_REUSE (3),
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.BR CURLOPT_FRESH_CONNECT (3),
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.BR CURLOPT_MAXAGE_CONN (3),
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.BR CURLOPT_TIMEOUT (3)
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