**************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) 1998 - 2019, Daniel Stenberg, <daniel@haxx.se>, et al.
*
* This software is licensed as described in the file COPYING, which
* you should have received as part of this distribution. The terms
* are also available at https://curl.haxx.se/docs/copyright.html.
*
* You may opt to use, copy, modify, merge, publish, distribute and/or sell
* copies of the Software, and permit persons to whom the Software is
* furnished to do so, under the terms of the COPYING file.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
**************************************************************************

CURLMOPT_MAX_PIPELINE_LENGTH - maximum number of requests in a pipeline #include <curl/curl.h> CURLMcode curl_multi_setopt(CURLM *handle, CURLMOPT_MAX_PIPELINE_LENGTH, long max); No function since pipelining was removed in 7.62.0. Pass a long. The set max number will be used as the maximum amount of outstanding requests in an HTTP/1.1 pipelined connection. This option is only used for HTTP/1.1 pipelining, not for HTTP/2 multiplexing. When this limit is reached, libcurl will use another connection to the same host (see CURLMOPT_MAX_HOST_CONNECTIONS(3)), or queue the request until one of the pipelines to the host is ready to accept a request. Thus, the total number of requests in-flight is CURLMOPT_MAX_HOST_CONNECTIONS(3) * CURLMOPT_MAX_PIPELINE_LENGTH(3). 5 HTTP(S)

CURLM *m = curl_multi_init();
/* set a more conservative pipe length */
curl_multi_setopt(m, CURLMOPT_MAX_PIPELINE_LENGTH, 3L);

Added in 7.30.0 Returns CURLM_OK if the option is supported, and CURLM_UNKNOWN_OPTION if not. CURLMOPT_PIPELINING "(3), " CURLMOPT_MAX_HOST_CONNECTIONS "(3), "