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 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.

              It is not supported to share cookies between multiple concurrent threads.

       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.

              It is not supported to share SSL sessions between multiple concurrent threads.

       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/2 or HTTP/3 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  multiplexed 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

       This functionality affects all supported protocols

EXAMPLE

       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 curl 7.10.3

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_cleanup(3), curl_share_init(3), curl_share_setopt(3)