mirror of https://github.com/curl/curl.git synced 2024-12-09 06:30:06 +08:00

Daniel Stenberg eefcc1bda4

docs: introduce "curldown" for libcurl man page format

curldown is this new file format for libcurl man pages. It is markdown
inspired with differences:

- Each file has a set of leading headers with meta-data
- Supports a small subset of markdown
- Uses .md file extensions for editors/IDE/GitHub to treat them nicely
- Generates man pages very similar to the previous ones
- Generates man pages that still convert nicely to HTML on the website
- Detects and highlights mentions of curl symbols automatically (when
  their man page section is specified)

tools:

- cd2nroff: converts from curldown to nroff man page
- nroff2cd: convert an (old) nroff man page to curldown
- cdall: convert many nroff pages to curldown versions
- cd2cd: verifies and updates a curldown to latest curldown

This setup generates .3 versions of all the curldown versions at build time.

CI:

Since the documentation is now technically markdown in the eyes of many
things, the CI runs many more tests and checks on this documentation,
including proselint, link checkers and tests that make sure we capitalize the
first letter after a period...

Closes #12730

2024-01-23 00:29:02 +01:00

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SPDX-License-Identifier

Title

Section

Source

See-also

curl

CURLOPT_PIPEWAIT

libcurl

CURLMOPT_MAX_HOST_CONNECTIONS (3)

CURLMOPT_PIPELINING (3)

CURLOPT_FORBID_REUSE (3)

CURLOPT_FRESH_CONNECT (3)

NAME

CURLOPT_PIPEWAIT - wait for 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 multiplexing before continuing.

When about to perform a new transfer that allows multiplexing, libcurl checks for existing connections to use. If no such connection exists it immediately continues and creates 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 instead waits for the connection to reveal if it is possible to multiplex on before it continues. This enables libcurl to much better keep the number of connections to a minimum when using multiplexing protocols.

With this option set, libcurl prefers to wait and reuse an existing connection for multiplexing 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

int main(void)
{
  CURL *curl = curl_easy_init();
  if(curl) {
    curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/");
    curl_easy_setopt(curl, CURLOPT_PIPEWAIT, 1L);

    /* now add this easy handle to the multi handle */
  }
}

AVAILABILITY

Added in 7.43.0

RETURN VALUE

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

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