c: Copyright (C) Daniel Stenberg, daniel@haxx.se, et al. SPDX-License-Identifier: curl Title: CURLMOPT_MAX_PIPELINE_LENGTH Section: 3 Source: libcurl See-also:

CURLMOPT_MAX_HOST_CONNECTIONS (3)
CURLMOPT_PIPELINING (3) Protocol:
All Added-in: 7.30.0 ---

NAME

CURLMOPT_MAX_PIPELINE_LENGTH - maximum number of requests in a pipeline

SYNOPSIS

#include <curl/curl.h>

CURLMcode curl_multi_setopt(CURLM *handle, CURLMOPT_MAX_PIPELINE_LENGTH,
                            long max);

DESCRIPTION

No function since pipelining was removed in 7.62.0.

Pass a long. The set max number is used as the maximum amount of outstanding requests in an HTTP/1.1 pipeline. This option is only used for HTTP/1.1 pipelining, not for HTTP/2 multiplexing.

When this limit is reached, libcurl creates 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).

DEFAULT

%PROTOCOLS%

EXAMPLE

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

%AVAILABILITY%

RETURN VALUE

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

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