curlopt_pipewait(3) [mojave man page]

CURLOPT_PIPEWAIT(3)					     curl_easy_setopt options					       CURLOPT_PIPEWAIT(3)

NAME

       CURLOPT_PIPEWAIT - wait for pipelining/multiplexing

SYNOPSIS

       #include <curl/curl.h>

       CURLcode curl_easy_setopt(CURL *handle, CURLOPT_PIPEWAIT, long wait);

DESCRIPTION

       Set  wait to 1L to tell libcurl to prefer to wait for a connection to confirm or deny that it can do pipelining or multiplexing before con-
       tinuing.

       When about to perform a new transfer that allows pipelining or multiplexing, libcurl will check for  existing  connections  to  re-use  and
       pipeline on. If no such connection exists it will immediately continue and create a fresh new connection to use.

       By  setting  this  option  to 1 - and having CURLMOPT_PIPELINING(3) enabled for the multi handle this transfer is associated with - libcurl
       will instead wait for the connection to reveal if it is possible to pipeline/multiplex on before it continues. This enables libcurl to much
       better keep the number of connections to a minimum when using pipelining or multiplexing protocols.

       The effect thus becomes that with this option set, libcurl prefers to wait and re-use an existing connection for pipelining rather than the
       opposite: prefer to open a new connection rather than waiting.

       The waiting time is as long as it takes for the connection to get up and for libcurl to get the necessary response  back  that  informs	it
       about its protocol and support level.

DEFAULT

       0 (off)

PROTOCOLS

       HTTP(S)

EXAMPLE

AVAILABILITY

       Added in 7.43.0

RETURN VALUE

       Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.

SEE ALSO

       CURLOPT_FORBID_REUSE(3), CURLOPT_FRESH_CONNECT(3), CURLMOPT_PIPELINING(3), CURLMOPT_MAX_HOST_CONNECTIONS(3),

libcurl 7.54.0							   May 01, 2016 					       CURLOPT_PIPEWAIT(3)

CURLMOPT_PIPELINING(3)					     curl_multi_setopt options					    CURLMOPT_PIPELINING(3)

NAME

       CURLMOPT_PIPELINING - enable HTTP pipelining and multiplexing

SYNOPSIS

       #include <curl/curl.h>

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

DESCRIPTION

       Pass in the bitmask parameter to instruct libcurl to enable HTTP pipelining and/or HTTP/2 multiplexing for this multi handle.

       When enabled, libcurl will attempt to use those protocol features when doing parallel requests to the same hosts.

       For pipelining, this means that if you add a second request that can use an already existing connection, the second request will be "piped"
       on the same connection rather than being executed in parallel.

       For multiplexing, this means that follow-up requests can re-use an existing connection and send the new request multiplexed  over  that	at
       the same time as other transfers are already using that single connection.

       There  are  several  other  related options that are interesting to tweak and adjust to alter how libcurl spreads out requests on different
       connections or not etc.

       Before 7.43.0, this option was set to 1 and 0 to enable and disable HTTP/1.1 pipelining.

       Starting in 7.43.0, bitmask's second bit also has a meaning, and you can ask for pipelining and multiplexing independently of each other by
       toggling the correct bits.

       CURLPIPE_NOTHING
       Default, which means doing no attempts at pipelining or multiplexing.

       CURLPIPE_HTTP1
	If this bit is set, libcurl will try to pipeline HTTP/1.1 requests on connections that are already established and in use to hosts.

       CURLPIPE_MULTIPLEX
	 If this bit is set, libcurl will try to multiplex the new transfer over an existing connection if possible. This requires HTTP/2.

DEFAULT

       0 (both pipeline and multiplexing are off)

PROTOCOLS

       HTTP(S)

EXAMPLE

       TODO

AVAILABILITY

       Added in 7.16.0. Multiplex support bit added in 7.43.0.

RETURN VALUE

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

SEE ALSO

       CURLMOPT_MAX_PIPELINE_LENGTH(3), 	  CURLMOPT_PIPELINING_SITE_BL(3),	   CURLMOPT_CONTENT_LENGTH_PENALTY_SIZE(3),	     CURL-
       MOPT_CHUNK_LENGTH_PENALTY_SIZE(3), CURLMOPT_MAX_HOST_CONNECTIONS(3), CURLMOPT_MAXCONNECTS(3), CURLMOPT_MAX_HOST_CONNECTIONS(3),

libcurl 7.54.0							September 01, 2016					    CURLMOPT_PIPELINING(3)