curl/docs/libcurl/opts/CURLOPT_MAXAGE_CONN.md

c	SPDX-License-Identifier	Title	Section	Source	See-also	Protocol	Added-in
Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.	curl	CURLOPT_MAXAGE_CONN	3	libcurl	CURLOPT_FORBID_REUSE (3) CURLOPT_FRESH_CONNECT (3) CURLOPT_MAXLIFETIME_CONN (3) CURLOPT_TIMEOUT (3)	All	7.65.0

NAME

CURLOPT_MAXAGE_CONN - max idle time allowed for reusing a connection

SYNOPSIS

#include <curl/curl.h>

CURLcode curl_easy_setopt(CURL *handle, CURLOPT_MAXAGE_CONN, long age);

DESCRIPTION

Pass a long as parameter containing age - the maximum time in seconds allowed for an existing connection to have been idle to be considered for reuse for this request.

The "connection cache" holds previously used connections. When a new request is to be done, libcurl considers any connection that matches for reuse. The CURLOPT_MAXAGE_CONN(3) limit prevents libcurl from trying too old connections for reuse, since old connections have a higher risk of not working and thus trying them is a performance loss and sometimes service loss due to the difficulties to figure out the situation. If a connection is found in the cache that is older than this set age, it is closed instead.

DEFAULT

118 seconds

%PROTOCOLS%

EXAMPLE

int main(void)
{
  CURL *curl = curl_easy_init();
  if(curl) {
    curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");

    /* only allow 30 seconds idle time */
    curl_easy_setopt(curl, CURLOPT_MAXAGE_CONN, 30L);

    curl_easy_perform(curl);
  }
}

%AVAILABILITY%

RETURN VALUE

Returns CURLE_OK.