CURLOPT_MAXLIFETIME_CONN - max lifetime (since creation) allowed for reusing a connection
#include <curl/curl.h> CURLcode curl_easy_setopt(CURL *handle, CURLOPT_MAXLIFETIME_CONN, long maxlifetime);
curl_easy_setopt options CURLOPT_MAXLIFETIME_CONN(3)
NAME
CURLOPT_MAXLIFETIME_CONN - max lifetime (since creation) allowed for
reusing a connection
SYNOPSIS
#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_MAXLIFETIME_CONN,
long maxlifetime);
DESCRIPTION
Pass a long as parameter containing maxlifetime - the maximum time in
seconds, since the creation of the connection, that you allow an exist-
ing connection to have to be considered for reuse for this request.
libcurl features a connection cache that holds previously used connec-
tions. When a new request is to be done, it will consider any connec-
tion that matches for reuse. The CURLOPT_MAXLIFETIME_CONN(3) limit pre-
vents 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 maxlifetime, 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.
DEFAULT
Default maxlifetime is 0 seconds (i.e., disabled).
PROTOCOLS
All
EXAMPLE
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);
}
AVAILABILITY
Added in 7.80.0
RETURN VALUE
Returns CURLE_OK.
ATTRIBUTES
See attributes(7) for descriptions of the following attributes:
+---------------+------------------+
|ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+---------------+------------------+
|Availability | web/curl |
+---------------+------------------+
|Stability | Uncommitted |
+---------------+------------------+
SEE ALSO
CURLOPT_TIMEOUT(3), CURLOPT_FORBID_REUSE(3), CURLOPT_FRESH_CONNECT(3),
CURLOPT_MAXAGE_CONN(3),
NOTES
Source code for open source software components in Oracle Solaris can
be found at https://www.oracle.com/downloads/opensource/solaris-source-
code-downloads.html.
This software was built from source available at
https://github.com/oracle/solaris-userland. The original community
source was downloaded from https://curl.se/down-
load/curl-7.83.1.tar.bz2.
Further information about this software can be found on the open source
community website at http://curl.haxx.se/.
libcurl 7.83.1 November 26, 2021
CURLOPT_MAXLIFETIME_CONN(3)