x SuSE Linux 13.1-RELEASE x
x SuSE Linux 13.1-RELEASEx
CURLSHOPT_SHARE(3) libcurl CURLSHOPT_SHARE(3)
NAME
CURLSHOPT_SHARE - add data to share
SYNOPSIS
#include <curl/curl.h>
CURLSHcode curl_share_setopt(CURLSH *share, CURLSHOPT_SHARE, long type);
DESCRIPTION
The type parameter specifies what specific data that should be shared
and kept in the share object that was created with curl_share_init(3).
The given type must be be one of the values described below. You can
set CURLSHOPT_SHARE(3) multiple times with different data arguments to
have the share object share multiple types of data. Unset a type again
by setting CURLSHOPT_UNSHARE(3).
CURL_LOCK_DATA_COOKIE
Cookie data is shared across the easy handles using this shared
object. Note that this does not activate an easy handle's cookie
handling. You can do that separately by using CURLOPT_COOK-
IEFILE(3) for example.
CURL_LOCK_DATA_DNS
Cached DNS hosts are shared across the easy handles using this
shared object. Note that when you use the multi interface, all
easy handles added to the same multi handle share DNS cache by
default without using this option.
CURL_LOCK_DATA_SSL_SESSION
SSL session IDs are shared across the easy handles using this
shared object. This reduces the time spent in the SSL handshake
when reconnecting to the same server. Note SSL session IDs are
reused within the same easy handle by default. Note this symbol
was added in 7.10.3 but was not implemented until 7.23.0.
CURL_LOCK_DATA_CONNECT
Put the connection cache in the share object and make all easy
handles using this share object share the connection cache.
It is not supported to share connections between multiple con-
current threads.
Connections that are used for HTTP/1.1 Pipelining or HTTP/2 mul-
tiplexing only get additional transfers added to them if the
existing connection is held by the same multi or easy handle.
libcurl does not support doing HTTP/2 streams in different
threads using a shared connection.
Support for CURL_LOCK_DATA_CONNECT was added in 7.57.0, but the
symbol existed before this.
Note that when you use the multi interface, all easy handles
added to the same multi handle shares connection cache by
default without using this option.
CURL_LOCK_DATA_PSL
The Public Suffix List stored in the share object is made avail-
able to all easy handle bound to the later. Since the Public
Suffix List is periodically refreshed, this avoids updates in
too many different contexts.
Added in 7.61.0.
Note that when you use the multi interface, all easy handles
added to the same multi handle shares PSL cache by default with-
out using this option.
CURL_LOCK_DATA_HSTS
The in-memory HSTS cache.
It is not supported to share the HSTS between multiple concur-
rent threads.
Added in 7.88.0
PROTOCOLS
All
EXAMPLE
CURLSHcode sh;
share = curl_share_init();
sh = curl_share_setopt(share, CURLSHOPT_SHARE, CURL_LOCK_DATA_COOKIE);
if(sh)
printf("Error: %s\n", curl_share_strerror(sh));
AVAILABILITY
Added in 7.10
RETURN VALUE
CURLSHE_OK (zero) means that the option was set properly, non-zero
means an error occurred. See libcurl-errors(3) for the full list with
descriptions.
SEE ALSO
curl_share_cleanup(3), curl_share_init(3), curl_share_setopt(3), CURL-
SHOPT_UNSHARE(3)
ibcurl 8.4.0 September 26, 2023 CURLSHOPT_SHARE(3)
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