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curl/docs/cmdline-opts/no-npn.md

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docs/cmdline: change to .md for cmdline docs - switch all invidual files documenting command line options into .md, as the documentation is now markdown-looking. - made the parser treat 4-space indents as quotes - switch to building the curl.1 manpage using the "mainpage.idx" file, which lists the files to include to generate it, instead of using the previous page-footer/headers. Also, those files are now also .md ones, using the same format. I gave them underscore prefixes to make them sort separately: _NAME.md, _SYNOPSIS.md, _DESCRIPTION.md, _URL.md, _GLOBBING.md, _VARIABLES.md, _OUTPUT.md, _PROTOCOLS.md, _PROGRESS.md, _VERSION.md, _OPTIONS.md, _FILES.md, _ENVIRONMENT.md, _PROXYPREFIX.md, _EXITCODES.md, _BUGS.md, _AUTHORS.md, _WWW.md, _SEEALSO.md - updated test cases accordingly Closes #12751
2024-01-21 06:18:43 +08:00
---
copyright: update all copyright lines and remove year ranges - they are mostly pointless in all major jurisdictions - many big corporations and projects already don't use them - saves us from pointless churn - git keeps history for us - the year range is kept in COPYING checksrc is updated to allow non-year using copyright statements Closes #10205
2023-01-02 20:51:48 +08:00
c: Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
docs/cmdline-opts: add copyright and license identifier to each file gen.pl now insists on C: and SPDX-License-Identifier: fields to be present in all files. Closes #9002
2022-06-14 06:12:03 +08:00
SPDX-License-Identifier: curl
cmdline-opts: first test version of a new man page generator kit See MANPAGE.md for the description of how this works. Each command line option is now described in a separate .d file.
2016-11-14 06:40:12 +08:00
Long: no-npn
cmdline-docs: more conversion
2016-11-16 21:20:36 +08:00
Tags: Versions HTTP/2
cmdline-opts: first test version of a new man page generator kit See MANPAGE.md for the description of how this works. Each command line option is now described in a separate .d file.
2016-11-14 06:40:12 +08:00
Protocols: HTTPS
Added: 7.36.0
Mutexed:
Requires: TLS
cmdline-opts: support generating the --help output
2016-11-15 16:08:50 +08:00
Help: Disable the NPN TLS extension
curl: move more options to deprecated category --no-npn, --sslv2, --sslv3 Closes #14109
2024-07-05 23:14:58 +08:00
Category: deprecated
cmdline/docs: add a required 'multi' keyword for each option The keyword specifies how option works when specified multiple times: - single: the last provided value replaces the earlier ones - append: it supports being provided multiple times - boolean: on/off values - mutex: flag-like option that disable anoter flag The 'gen.pl' script then outputs the proper and unified language for each option's multi-use behavior in the generated man page. The multi: header is requires in each .d file and will cause build error if missing or set to an unknown value. Closes #9759
2022-10-18 16:39:43 +08:00
Multi: boolean
docs/cmdline: change to .md for cmdline docs - switch all invidual files documenting command line options into .md, as the documentation is now markdown-looking. - made the parser treat 4-space indents as quotes - switch to building the curl.1 manpage using the "mainpage.idx" file, which lists the files to include to generate it, instead of using the previous page-footer/headers. Also, those files are now also .md ones, using the same format. I gave them underscore prefixes to make them sort separately: _NAME.md, _SYNOPSIS.md, _DESCRIPTION.md, _URL.md, _GLOBBING.md, _VARIABLES.md, _OUTPUT.md, _PROTOCOLS.md, _PROGRESS.md, _VERSION.md, _OPTIONS.md, _FILES.md, _ENVIRONMENT.md, _PROXYPREFIX.md, _EXITCODES.md, _BUGS.md, _AUTHORS.md, _WWW.md, _SEEALSO.md - updated test cases accordingly Closes #12751
2024-01-21 06:18:43 +08:00
See-also:
- no-alpn
- http2
Example:
- --no-npn $URL
cmdline-opts: first test version of a new man page generator kit See MANPAGE.md for the description of how this works. Each command line option is now described in a separate .d file.
2016-11-14 06:40:12 +08:00
---
docs/cmdline: change to .md for cmdline docs - switch all invidual files documenting command line options into .md, as the documentation is now markdown-looking. - made the parser treat 4-space indents as quotes - switch to building the curl.1 manpage using the "mainpage.idx" file, which lists the files to include to generate it, instead of using the previous page-footer/headers. Also, those files are now also .md ones, using the same format. I gave them underscore prefixes to make them sort separately: _NAME.md, _SYNOPSIS.md, _DESCRIPTION.md, _URL.md, _GLOBBING.md, _VARIABLES.md, _OUTPUT.md, _PROTOCOLS.md, _PROGRESS.md, _VERSION.md, _OPTIONS.md, _FILES.md, _ENVIRONMENT.md, _PROXYPREFIX.md, _EXITCODES.md, _BUGS.md, _AUTHORS.md, _WWW.md, _SEEALSO.md - updated test cases accordingly Closes #12751
2024-01-21 06:18:43 +08:00
# `--no-npn`
cmdline-docs: make sure to phrase it as "added in ...." References to things that were added or changed in a specific version should be specified as "(added in [version]) for two reasons: 1 - consistency 2 - to allow gen.pl to strip them out if deemed referring to too old versions Closes #11821
2023-09-08 20:03:59 +08:00
curl never uses NPN, this option has no effect (added in 7.86.0).
NPN: remove support for and use of Next Protocol Negotiation is a TLS extension that was created and used for agreeing to use the SPDY protocol (the precursor to HTTP/2) for HTTPS. In the early days of HTTP/2, before the spec was finalized and shipped, the protocol could be enabled using this extension with some servers. curl supports the NPN extension with some TLS backends since then, with a command line option `--npn` and in libcurl with `CURLOPT_SSL_ENABLE_NPN`. HTTP/2 proper is made to use the ALPN (Application-Layer Protocol Negotiation) extension and the NPN extension has no purposes anymore. The HTTP/2 spec was published in May 2015. Today, use of NPN in the wild should be extremely rare and most likely totally extinct. Chrome removed NPN support in Chrome 51, shipped in June 2016. Removed in Firefox 53, April 2017. Closes #9307
2022-09-01 15:23:22 +08:00
cmdline-opts: first test version of a new man page generator kit See MANPAGE.md for the description of how this works. Each command line option is now described in a separate .d file.
2016-11-14 06:40:12 +08:00
Disable the NPN TLS extension. NPN is enabled by default if libcurl was built
with an SSL library that supports NPN. NPN is used by a libcurl that supports
HTTP/2 to negotiate HTTP/2 support with the server during https sessions.
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