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 will be 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 will be 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 will share DNS cache
              by default without using this option.

       CURL_LOCK_DATA_SSL_SESSION
              SSL session IDs will be shared across the easy handles using this shared object. This will  reduce
              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.

              Note  that  due  to  a  known  bug,  it is not safe to share connections this way 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  will
              share 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  will
              share PSL cache by default without using this option.

       CURL_LOCK_DATA_HSTS
              The in-memory HSTS cache.

              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

       CURLSHOPT_UNSHARE(3), curl_share_setopt(3), curl_share_cleanup(3), curl_share_init(3)

libcurl 7.81.0                                  November 12, 2021                             CURLSHOPT_SHARE(3)