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CURLMOPT_PIPELINING(3)     Library Functions Manual     CURLMOPT_PIPELINING(3)


NAME

       CURLMOPT_PIPELINING - enable HTTP multiplexing


SYNOPSIS

       #include <curl/curl.h>

       CURLMcode curl_multi_setopt(CURLM *handle, CURLMOPT_PIPELINING, long bitmask);


DESCRIPTION

       Pass in the correct value in the bitmask parameter to instruct libcurl
       to enable multiplexing for this multi handle.

       With multiplexing enabled, libcurl attempts to do multiple transfers
       over the same connection when doing parallel transfers to the same
       hosts.

       CURLPIPE_NOTHING (0)
              Make no attempts at multiplexing.

       CURLPIPE_HTTP1 (1)
              This bit is deprecated and has no effect since version 7.62.0.

       CURLPIPE_MULTIPLEX (2)
              If this bit is set, libcurl tries to multiplex the new transfer
              over an existing connection if possible. This requires HTTP/2 or
              HTTP/3.


DEFAULT

       CURLPIPE_MULTIPLEX


PROTOCOLS

       This functionality affects http only


EXAMPLE

       int main(void)
       {
         CURLM *m = curl_multi_init();
         /* try HTTP/2 multiplexing */
         curl_multi_setopt(m, CURLMOPT_PIPELINING, CURLPIPE_MULTIPLEX);
       }


HISTORY

       The multiplex support bit was added in 7.43.0. HTTP/1 Pipelining
       support was disabled in 7.62.0.

       Since 7.62.0, CURLPIPE_MULTIPLEX is enabled by default.

       Before that, default was CURLPIPE_NOTHING.


AVAILABILITY

       Added in curl 7.16.0


RETURN VALUE

       Returns CURLM_OK if the option is supported, and CURLM_UNKNOWN_OPTION
       if not.


SEE ALSO

       CURLMOPT_CHUNK_LENGTH_PENALTY_SIZE(3),
       CURLMOPT_CONTENT_LENGTH_PENALTY_SIZE(3), CURLMOPT_MAXCONNECTS(3),
       CURLMOPT_MAX_HOST_CONNECTIONS(3), CURLMOPT_MAX_PIPELINE_LENGTH(3),
       CURLMOPT_PIPELINING_SITE_BL(3)

libcurl                           2024-12-12            CURLMOPT_PIPELINING(3)

curl 8.11.1 - Generated Fri Dec 13 14:13:17 CST 2024
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