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A stream may be shut without any HTX EOM reported. This is the case for QCS instances flagged with QC_SF_UNKNOWN_PL_LENGTH. In this case, shut is conducted with an empty FIN emission instead of a RESET_STREAM. This has been implemented since the following patch : 24962dd1784dd22babc8da09a5fc8769617f89e3 BUG/MEDIUM: mux-quic: do not emit RESET_STREAM for unknown length However, in case of HTTP/3, an empty FIN should only be done after a full message is emitted, which requires a HEADERS frame. If an empty FIN is emitted without it, client may interpret this as invalid and close the connection. To prevent this, fallback to a RESET_STREAM emission if not data were emitted on the stream. This was reproduced using ngtcp2-client with 10% loss (-r 0.1) on a remote host, with httpterm request "/?s=100k&C=1&b=0&P=400". An error ERR_H3_FRAME_UNEXPECTED is returned by ngtcp2-client when the bug occurs. Note that this change is incomplete. The message validity depends solely on the application protocol in use. As such, a new app_ops callback should be implemented to ensure the stream is closed accordingly. However, this first patch ensures that at least HTTP/3 case is valid while keeping a minimal backport process. This should be backported up to 2.8.
HAProxy
HAProxy is a free, very fast and reliable reverse-proxy offering high availability, load balancing, and proxying for TCP and HTTP-based applications.
Installation
The INSTALL file describes how to build HAProxy. A list of packages is also available on the wiki.
Getting help
The discourse and the mailing-list are available for questions or configuration assistance. You can also use the slack or IRC channel. Please don't use the issue tracker for these.
The issue tracker is only for bug reports or feature requests.
Documentation
The HAProxy documentation has been split into a number of different files for ease of use. It is available in text format as well as HTML. The wiki is also meant to replace the old architecture guide.
Please refer to the following files depending on what you're looking for:
- INSTALL for instructions on how to build and install HAProxy
- BRANCHES to understand the project's life cycle and what version to use
- LICENSE for the project's license
- CONTRIBUTING for the process to follow to submit contributions
The more detailed documentation is located into the doc/ directory:
- doc/intro.txt for a quick introduction on HAProxy
- doc/configuration.txt for the configuration's reference manual
- doc/lua.txt for the Lua's reference manual
- doc/SPOE.txt for how to use the SPOE engine
- doc/network-namespaces.txt for how to use network namespaces under Linux
- doc/management.txt for the management guide
- doc/regression-testing.txt for how to use the regression testing suite
- doc/peers.txt for the peers protocol reference
- doc/coding-style.txt for how to adopt HAProxy's coding style
- doc/internals for developer-specific documentation (not all up to date)
License
HAProxy is licensed under GPL 2 or any later version, the headers under LGPL 2.1. See the LICENSE file for a more detailed explanation.