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.\" ************************************************************************** .\" * _ _ ____ _ .\" * Project ___| | | | _ \| | .\" * / __| | | | |_) | | .\" * | (__| |_| | _ <| |___ .\" * \___|\___/|_| \_\_____| .\" * .\" * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al. .\" * .\" * This software is licensed as described in the file COPYING, which .\" * you should have received as part of this distribution. The terms .\" * are also available at https://curl.se/docs/copyright.html. .\" * .\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell .\" * copies of the Software, and permit persons to whom the Software is .\" * furnished to do so, under the terms of the COPYING file. .\" * .\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY .\" * KIND, either express or implied. .\" * .\" * SPDX-License-Identifier: curl .\" * .\" ************************************************************************** .\" .TH CURLOPT_MAXLIFETIME_CONN 3 "January 02, 2023" "libcurl 7.88.1" "curl_easy_setopt options" .SH NAME CURLOPT_MAXLIFETIME_CONN \- max lifetime (since creation) allowed for reusing a connection .SH SYNOPSIS .nf #include <curl/curl.h> CURLcode curl_easy_setopt(CURL *handle, CURLOPT_MAXLIFETIME_CONN, long maxlifetime); .fi .SH DESCRIPTION Pass a long as parameter containing \fImaxlifetime\fP - the maximum time in seconds, since the creation of the connection, that you allow an existing connection to have to be considered for reuse for this request. libcurl features a connection cache that holds previously used connections. When a new request is to be done, it will consider any connection that matches for reuse. The \fICURLOPT_MAXLIFETIME_CONN(3)\fP limit prevents libcurl from trying too old connections for reuse. This can be used for client-side load balancing. If a connection is found in the cache that is older than this set \fImaxlifetime\fP, it will instead be closed once any in-progress transfers complete. If set to 0, this behavior is disabled: all connections are eligible for reuse. .SH DEFAULT Default \fImaxlifetime\fP is 0 seconds (i.e., disabled). .SH PROTOCOLS All .SH EXAMPLE .nf CURL *curl = curl_easy_init(); if(curl) { curl_easy_setopt(curl, CURLOPT_URL, "https://example.com"); /* only allow each connection to be reused for 30 seconds */ curl_easy_setopt(curl, CURLOPT_MAXLIFETIME_CONN, 30L); curl_easy_perform(curl); } .fi .SH AVAILABILITY Added in 7.80.0 .SH RETURN VALUE Returns CURLE_OK. .SH "SEE ALSO" .BR CURLOPT_TIMEOUT "(3), " CURLOPT_FORBID_REUSE "(3), " .BR CURLOPT_FRESH_CONNECT "(3), " CURLOPT_MAXAGE_CONN "(3), "