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3rd-party/curl-7.52.1/docs/libcurl/opts/CURLOPT_PIPEWAIT.3
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3rd-party/curl-7.52.1/docs/libcurl/opts/CURLOPT_PIPEWAIT.3
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.\" **************************************************************************
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.\" * Copyright (C) 1998 - 2016, Daniel Stenberg, <daniel@haxx.se>, et al.
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.\" **************************************************************************
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.\"
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.TH CURLOPT_PIPEWAIT 3 "12 May 2015" "libcurl 7.43.0" "curl_easy_setopt options"
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.SH NAME
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CURLOPT_PIPEWAIT \- wait for pipelining/multiplexing
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.SH SYNOPSIS
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#include <curl/curl.h>
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CURLcode curl_easy_setopt(CURL *handle, CURLOPT_PIPEWAIT, long wait);
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.SH DESCRIPTION
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Set \fIwait\fP to 1L to tell libcurl to prefer to wait for a connection to
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confirm or deny that it can do pipelining or multiplexing before continuing.
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When about to perform a new transfer that allows pipelining or multiplexing,
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libcurl will check for existing connections to re-use and pipeline on. If no
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such connection exists it will immediately continue and create a fresh new
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connection to use.
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By setting this option to 1 - and having \fICURLMOPT_PIPELINING(3)\fP enabled
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for the multi handle this transfer is associated with - libcurl will instead
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wait for the connection to reveal if it is possible to pipeline/multiplex on
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before it continues. This enables libcurl to much better keep the number of
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connections to a minimum when using pipelining or multiplexing protocols.
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The effect thus becomes that with this option set, libcurl prefers to wait and
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re-use an existing connection for pipelining rather than the opposite: prefer
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to open a new connection rather than waiting.
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The waiting time is as long as it takes for the connection to get up and for
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libcurl to get the necessary response back that informs it about its protocol
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and support level.
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.SH DEFAULT
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0 (off)
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.SH PROTOCOLS
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HTTP(S)
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.SH EXAMPLE
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.SH AVAILABILITY
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Added in 7.43.0
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.SH RETURN VALUE
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Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
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.SH "SEE ALSO"
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.BR CURLOPT_FORBID_REUSE "(3), " CURLOPT_FRESH_CONNECT "(3), "
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.BR CURLMOPT_PIPELINING "(3), " CURLMOPT_MAX_HOST_CONNECTIONS "(3), "
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