118 lines
3.3 KiB
Markdown
118 lines
3.3 KiB
Markdown
|
---
|
||
|
|
c: Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
|
||
|
|
SPDX-License-Identifier: curl
|
||
|
|
Title: CURLSHOPT_SHARE
|
||
|
|
Section: 3
|
||
|
|
Source: libcurl
|
||
|
|
See-also:
|
||
|
|
- CURLSHOPT_UNSHARE (3)
|
||
|
|
- curl_share_cleanup (3)
|
||
|
|
- curl_share_init (3)
|
||
|
|
- curl_share_setopt (3)
|
||
|
|
---
|
||
|
|
|
||
|
|
# NAME
|
||
|
|
|
||
|
|
CURLSHOPT_SHARE - add data to share
|
||
|
|
|
||
|
|
# SYNOPSIS
|
||
|
|
|
||
|
|
~~~c
|
||
|
|
#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 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_COOKIEFILE(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 concurrent threads.
|
||
|
|
|
||
|
|
Connections that are used for HTTP/1.1 Pipelining or HTTP/2 multiplexing 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 available 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 without using this option.
|
||
|
|
|
||
|
|
## CURL_LOCK_DATA_HSTS
|
||
|
|
|
||
|
|
The in-memory HSTS cache.
|
||
|
|
|
||
|
|
It is not supported to share the HSTS between multiple concurrent threads.
|
||
|
|
|
||
|
|
Added in 7.88.0
|
||
|
|
|
||
|
|
# PROTOCOLS
|
||
|
|
|
||
|
|
All
|
||
|
|
|
||
|
|
# EXAMPLE
|
||
|
|
|
||
|
|
~~~c
|
||
|
|
int main(void)
|
||
|
|
{
|
||
|
|
CURLSHcode sh;
|
||
|
|
CURLSH *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.
|