From e649432e7234dfe6905f4663bd0ce7b37ef2c5e7 Mon Sep 17 00:00:00 2001 From: Daniel Stenberg Date: Sun, 14 Apr 2019 23:20:01 +0200 Subject: CURLOPT_MAXAGE_CONN: set the maximum allowed age for conn reuse ... and disconnect too old ones instead of trying to reuse. Default max age is set to 118 seconds. Ref: #3722 Closes #3782 --- docs/libcurl/opts/CURLOPT_MAXAGE_CONN.3 | 65 +++++++++++++++++++++++++++++++++ 1 file changed, 65 insertions(+) create mode 100644 docs/libcurl/opts/CURLOPT_MAXAGE_CONN.3 (limited to 'docs/libcurl/opts/CURLOPT_MAXAGE_CONN.3') diff --git a/docs/libcurl/opts/CURLOPT_MAXAGE_CONN.3 b/docs/libcurl/opts/CURLOPT_MAXAGE_CONN.3 new file mode 100644 index 000000000..f91bf7a8d --- /dev/null +++ b/docs/libcurl/opts/CURLOPT_MAXAGE_CONN.3 @@ -0,0 +1,65 @@ +.\" ************************************************************************** +.\" * _ _ ____ _ +.\" * Project ___| | | | _ \| | +.\" * / __| | | | |_) | | +.\" * | (__| |_| | _ <| |___ +.\" * \___|\___/|_| \_\_____| +.\" * +.\" * Copyright (C) 2019, Daniel Stenberg, , et al. +.\" * +.\" * This software is licensed as described in the file COPYING, which +.\" * you should have received as part of this distribution. The terms +.\" * are also available at https://curl.haxx.se/docs/copyright.html. +.\" * +.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell +.\" * copies of the Software, and permit persons to whom the Software is +.\" * furnished to do so, under the terms of the COPYING file. +.\" * +.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY +.\" * KIND, either express or implied. +.\" * +.\" ************************************************************************** +.\" +.TH CURLOPT_MAXAGE_CONN 3 "18 Apr 2019" "libcurl 7.65.0" "curl_easy_setopt options" +.SH NAME +CURLOPT_MAXAGE_CONN \- max idle time allowed for reusing a connection +.SH SYNOPSIS +#include + +CURLcode curl_easy_setopt(CURL *handle, CURLOPT_MAXAGE_CONN, long maxage); +.SH DESCRIPTION +Pass a long as parameter containing \fImaxage\fP - the maximum time in seconds +that you allow an existing connection to have to be considered for reuse for +this request. + +The "connection cache" that holds previously used connections. When a new +request is to be done, it will consider any connection that matches for +reuse. The \fICURLOPT_MAXAGE_CONN(3)\fP limit prevents libcurl from trying +very old connections for reuse, since old connections have a high 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 \fImaxage\fP, it will instead be +closed. +.SH DEFAULT +Default maxage is 118 seconds. +.SH PROTOCOLS +All +.SH EXAMPLE +.nf +CURL *curl = curl_easy_init(); +if(curl) { + curl_easy_setopt(curl, CURLOPT_URL, "http://example.com"); + + /* only allow 30 seconds idle time */ + curl_easy_setopt(curl, CURLOPT_MAXAGE_CONN, 30L); + + curl_easy_perform(curl); +} +.fi +.SH AVAILABILITY +Added in libcurl 7.65.0 +.SH RETURN VALUE +Returns CURLE_OK. +.SH "SEE ALSO" +.BR CURLOPT_TIMEOUT "(3), " CURLOPT_FORBID_REUSE "(3), " +.BR CURLOPT_FRESH_CONNECT "(3), " -- cgit v1.2.3