2021-11-12 17:56:05 +08:00
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.\" **************************************************************************
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.\" * _ _ ____ _
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.\" * \___|\___/|_| \_\_____|
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.\" *
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.\" * Copyright (C) 1998 - 2021, Daniel Stenberg, <daniel@haxx.se>, et al.
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.\" * This software is licensed as described in the file COPYING, which
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.\" **************************************************************************
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.TH CURLSHOPT_SHARE 3 "8 Aug 2003" "libcurl 7.10.7" "libcurl Manual"
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.SH NAME
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CURLSHOPT_SHARE - add data to share
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.SH SYNOPSIS
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.nf
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#include <curl/curl.h>
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CURLSHcode curl_share_setopt(CURLSH *share, CURLSHOPT_SHARE, long type);
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.fi
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.SH DESCRIPTION
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The \fItype\fP parameter specifies what specific data that should be shared
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and kept in the share object that was created with \fIcurl_share_init(3)\fP.
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The given \fItype\fP must be be one of the values described below. You can set
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\fICURLSHOPT_SHARE(3)\fP multiple times with different data arguments to have
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the share object share multiple types of data. Unset a type again by setting
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\fICURLSHOPT_UNSHARE(3)\fP.
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.IP CURL_LOCK_DATA_COOKIE
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Cookie data will be shared across the easy handles using this shared object.
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Note that this does not activate an easy handle's cookie handling. You can do
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that separately by using \fICURLOPT_COOKIEFILE(3)\fP for example.
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.IP CURL_LOCK_DATA_DNS
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Cached DNS hosts will be shared across the easy handles using this shared
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object. Note that when you use the multi interface, all easy handles added to
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the same multi handle will share DNS cache by default without using this
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option.
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.IP CURL_LOCK_DATA_SSL_SESSION
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SSL session IDs will be shared across the easy handles using this shared
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object. This will reduce the time spent in the SSL handshake when reconnecting
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to the same server. Note SSL session IDs are reused within the same easy
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handle by default. Note this symbol was added in 7.10.3 but was not
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implemented until 7.23.0.
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.IP CURL_LOCK_DATA_CONNECT
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Put the connection cache in the share object and make all easy handles using
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this share object share the connection cache.
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Note that due to a known bug, it is not safe to share connections this way
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between multiple concurrent threads.
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Connections that are used for HTTP/1.1 Pipelining or HTTP/2 multiplexing only
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get additional transfers added to them if the existing connection is held by
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the same multi or easy handle. libcurl does not support doing HTTP/2 streams
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in different threads using a shared connection.
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Support for \fBCURL_LOCK_DATA_CONNECT\fP was added in 7.57.0, but the symbol
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existed before this.
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Note that when you use the multi interface, all easy handles added to the same
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multi handle will share connection cache by default without using this option.
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.IP CURL_LOCK_DATA_PSL
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The Public Suffix List stored in the share object is made available to all
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easy handle bound to the later. Since the Public Suffix List is periodically
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refreshed, this avoids updates in too many different contexts.
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Added in 7.61.0.
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Note that when you use the multi interface, all easy handles added to the same
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multi handle will share PSL cache by default without using this option.
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.SH PROTOCOLS
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All
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.SH EXAMPLE
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.nf
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2022-04-16 05:35:15 +08:00
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CURLSHcode sh;
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2021-11-12 17:56:05 +08:00
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share = curl_share_init();
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sh = curl_share_setopt(share, CURLSHOPT_SHARE, CURL_LOCK_DATA_COOKIE);
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if(sh)
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printf("Error: %s\\n", curl_share_strerror(sh));
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.fi
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.SH AVAILABILITY
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Added in 7.10
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.SH RETURN VALUE
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CURLSHE_OK (zero) means that the option was set properly, non-zero means an
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error occurred. See \fIlibcurl-errors(3)\fP for the full list with
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descriptions.
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.SH "SEE ALSO"
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.BR CURLSHOPT_UNSHARE "(3), "
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.BR curl_share_setopt "(3), " curl_share_cleanup "(3), " curl_share_init "(3)"
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