CURLOPT_MAXAGE_CONN - Man Page

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

Default maximum age is set to 118 seconds.

Protocols

All

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

Added in 7.65.0

Return Value

Returns CURLE_OK.

See Also

CURLOPT_FORBID_REUSE(3), CURLOPT_FRESH_CONNECT(3), CURLOPT_MAXLIFETIME_CONN(3), CURLOPT_TIMEOUT(3)

Referenced By

curl_easy_setopt(3), CURLOPT_DNS_CACHE_TIMEOUT(3), CURLOPT_FRESH_CONNECT(3), CURLOPT_MAXLIFETIME_CONN(3), CURLOPT_SSL_SESSIONID_CACHE(3), libcurl-symbols(3).

February 19 2024 libcurl