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CURLOPT_MAXLIFETIME_CONN(3)

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CURLOPT_MA...ETIME_CONN(3) Library Functions Manual CURLOPT_MA...ETIME_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, libcurl considers 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 is instead marked for
       closure.

       If set to 0, this behavior is disabled: all  connections  are  eligible
       for reuse.

DEFAULT
       24  hours (since 8.17.0). Before that, the default was 0 seconds (i.e.,
       disabled)

PROTOCOLS
       This functionality affects all supported protocols

EXAMPLE
       int main(void)
       {
         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 curl 7.80.0

RETURN VALUE
       curl_easy_setopt(3) returns a CURLcode indicating success or error.

       CURLE_OK (0) means everything was OK, non-zero means an error occurred,
       see libcurl-errors(3).


ATTRIBUTES
       See attributes(7) for descriptions of the following attributes:

       box; cbp-1 | cbp-1 l | l .  ATTRIBUTE TYPE ATTRIBUTE VALUE = Availabil‐
       ity   web/curl = Stability Uncommitted

SEE ALSO
       CURLOPT_FORBID_REUSE(3),     CURLOPT_FRESH_CONNECT(3),     CURLOPT_MAX‐
       AGE_CONN(3), CURLOPT_TIMEOUT(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/download/curl-8.17.0.tar.bz2

       Further information about this software can be found on the open source
       community website at http://curl.haxx.se/.

libcurl                           2025-12-01        CURLOPT_MA...ETIME_CONN(3)
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