NAME

       curl_easy_duphandle - Clone a libcurl session handle

SYNOPSIS

       #include <curl/curl.h>

       CURL *curl_easy_duphandle(CURL *handle);

DESCRIPTION

       This  function  returns a new curl handle, a duplicate, using all the options previously set in the input
       curl handle. Both handles can subsequently be used  independently  and  they  must  both  be  freed  with
       curl_easy_cleanup(3).

       Any  options  that the input handle has been told to point to (as opposed to copy) with previous calls to
       curl_easy_setopt(3), are pointed to by the new handle as well. You must therefore make sure to  keep  the
       data around until both handles have been cleaned up.

       The new handle does not inherit any state information, no connections, no SSL sessions and no cookies. It
       also  does  not  inherit  any  share  object states or options (created as if CURLOPT_SHARE(3) was set to
       NULL).

       If the source handle has HSTS or alt-svc enabled, the duplicate gets data read data from  the  main  file
       name to populate the cache.

       In  multi-threaded  programs, this function must be called in a synchronous way, the input handle may not
       be in use when cloned.

EXAMPLE

       int main(void)
       {
         CURL *curl = curl_easy_init();
         if(curl) {
           CURLcode res;
           CURL *nother;
           curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
           nother = curl_easy_duphandle(curl);
           res = curl_easy_perform(nother);
           curl_easy_cleanup(nother);
           curl_easy_cleanup(curl);
         }
       }

AVAILABILITY

       Added in 7.9

RETURN VALUE

       If this function returns NULL, something went wrong and no valid handle was returned.

SEE ALSO

       curl_easy_cleanup(3), curl_easy_init(3), curl_easy_reset(3), curl_global_init(3)

libcurl 8.5.0                                   December 04, 2023                         curl_easy_duphandle(3)