74 lines
1.7 KiB
Markdown
74 lines
1.7 KiB
Markdown
|
---
|
||
|
|
c: Copyright (C) Daniel Stenberg, <daniel.se>, et al.
|
||
|
|
SPDX-License-Identifier: curl
|
||
|
|
Title: CURLOPT_MAXLIFETIME_CONN
|
||
|
|
Section: 3
|
||
|
|
Source: libcurl
|
||
|
|
See-also:
|
||
|
|
- CURLOPT_FORBID_REUSE (3)
|
||
|
|
- CURLOPT_FRESH_CONNECT (3)
|
||
|
|
- CURLOPT_MAXAGE_CONN (3)
|
||
|
|
- CURLOPT_TIMEOUT (3)
|
||
|
|
---
|
||
|
|
|
||
|
|
# NAME
|
||
|
|
|
||
|
|
CURLOPT_MAXLIFETIME_CONN - max lifetime (since creation) allowed for reusing a connection
|
||
|
|
|
||
|
|
# SYNOPSIS
|
||
|
|
|
||
|
|
~~~c
|
||
|
|
#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 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, libcurl considers any connection that
|
||
|
|
matches for reuse. The CURLOPT_MAXLIFETIME_CONN(3) 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 *maxlifetime*, it is instead marked for closure.
|
||
|
|
|
||
|
|
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
|
||
|
|
|
||
|
|
~~~c
|
||
|
|
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 7.80.0
|
||
|
|
|
||
|
|
# RETURN VALUE
|
||
|
|
|
||
|
|
Returns CURLE_OK.
|